Merge tag 'staging-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging

Pull staging/IIO driver updates from Greg KH:
 "Here is the large set of Staging and IIO driver patches for 5.9-rc1.

  Lots of churn here, but overall the size increase in lines added is
  small, while adding a load of new IIO drivers.

  Major things in here:

   - lots and lots of IIO new drivers and frameworks added

   - IIO driver fixes and updates

   - lots of tiny coding style cleanups for staging drivers

   - vc04_services major reworks and cleanups

  We had 3 set of drivers move out of staging in this round as well:

   - wilc1000 wireless driver moved out of staging

   - speakup moved out of staging

   - most USB driver moved out of staging

  Full details are in the shortlog.

  All of these have been in linux-next with no reported issues. The last
  few changes here were to resolve reported linux-next issues, and they
  seem to have resolved the problems"

* tag 'staging-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: (428 commits)
  staging: most: fix up movement of USB driver
  staging: rts5208: clear alignment style issues
  staging: r8188eu: replace rtw_netdev_priv define with inline function
  staging: netlogic: clear alignment style issues
  staging: android: ashmem: Fix lockdep warning for write operation
  drivers: most: add USB adapter driver
  staging: most: Use %pM format specifier for MAC addresses
  staging: ks7010: Use %pM format specifier for MAC addresses
  staging: qlge: qlge_dbg: removed comment repition
  staging: wfx: Use flex_array_size() helper in memcpy()
  staging: rtl8723bs: Align macro definitions
  staging: rtl8723bs: Clean up function declations
  staging: rtl8723bs: Fix coding style errors
  drivers: staging: audio: Fix the missing header file for helper file
  staging: greybus: audio: Enable GB codec, audio module compilation.
  staging: greybus: audio: Add helper APIs for dynamic audio modules
  staging: greybus: audio: Resolve compilation error in topology parser
  staging: greybus: audio: Resolve compilation errors for GB codec module
  staging: greybus: audio: Maintain jack list within GB Audio module
  staging: greybus: audio: Update snd_jack FW usage as per new APIs
  ...

103 files changed, 1328 insertions, 702 deletions

diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index ff3569635ce0..66d9cc073157 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -294,7 +294,7 @@ config ASPEED_ADC
 
 config AT91_ADC
 	tristate "Atmel AT91 ADC"
-	depends on ARCH_AT91
+	depends on ARCH_AT91 || COMPILE_TEST
 	depends on INPUT && SYSFS
 	select IIO_BUFFER
 	select IIO_TRIGGERED_BUFFER
@@ -500,6 +500,7 @@ config INA2XX_ADC
 config INGENIC_ADC
 	tristate "Ingenic JZ47xx SoCs ADC driver"
 	depends on MIPS || COMPILE_TEST
+	select IIO_BUFFER
 	help
 	  Say yes here to build support for the Ingenic JZ47xx SoCs ADC unit.
 
diff --git a/drivers/iio/adc/ab8500-gpadc.c b/drivers/iio/adc/ab8500-gpadc.c
index fd5b18d7f0c2..7fdc5d2d1d35 100644
--- a/drivers/iio/adc/ab8500-gpadc.c
+++ b/drivers/iio/adc/ab8500-gpadc.c
@@ -1163,8 +1163,6 @@ static int ab8500_gpadc_probe(struct platform_device *pdev)
 
 	pm_runtime_put(dev);
 
-	indio_dev->dev.parent = dev;
-	indio_dev->dev.of_node = np;
 	indio_dev->name = "ab8500-gpadc";
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &ab8500_gpadc_info;
diff --git a/drivers/iio/adc/ad7091r-base.c b/drivers/iio/adc/ad7091r-base.c
index 33c40357bd5e..63b4d6ea4566 100644
--- a/drivers/iio/adc/ad7091r-base.c
+++ b/drivers/iio/adc/ad7091r-base.c
@@ -224,7 +224,6 @@ int ad7091r_probe(struct device *dev, const char *name,
 	st->chip_info = chip_info;
 	st->map = map;
 
-	iio_dev->dev.parent = dev;
 	iio_dev->name = name;
 	iio_dev->info = &ad7091r_info;
 	iio_dev->modes = INDIO_DIRECT_MODE;
diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c
index a3c0647a5391..8dce06e9e69c 100644
--- a/drivers/iio/adc/ad7124.c
+++ b/drivers/iio/adc/ad7124.c
@@ -12,6 +12,7 @@
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
 
@@ -47,6 +48,15 @@
 #define AD7124_ADC_CTRL_MODE_MSK	GENMASK(5, 2)
 #define AD7124_ADC_CTRL_MODE(x)	FIELD_PREP(AD7124_ADC_CTRL_MODE_MSK, x)
 
+/* AD7124 ID */
+#define AD7124_DEVICE_ID_MSK		GENMASK(7, 4)
+#define AD7124_DEVICE_ID_GET(x)		FIELD_GET(AD7124_DEVICE_ID_MSK, x)
+#define AD7124_SILICON_REV_MSK		GENMASK(3, 0)
+#define AD7124_SILICON_REV_GET(x)	FIELD_GET(AD7124_SILICON_REV_MSK, x)
+
+#define CHIPID_AD7124_4			0x0
+#define CHIPID_AD7124_8			0x1
+
 /* AD7124_CHANNEL_X */
 #define AD7124_CHANNEL_EN_MSK		BIT(15)
 #define AD7124_CHANNEL_EN(x)		FIELD_PREP(AD7124_CHANNEL_EN_MSK, x)
@@ -120,6 +130,8 @@ static const char * const ad7124_ref_names[] = {
 };
 
 struct ad7124_chip_info {
+	const char *name;
+	unsigned int chip_id;
 	unsigned int num_inputs;
 };
 
@@ -165,9 +177,13 @@ static const struct iio_chan_spec ad7124_channel_template = {
 
 static struct ad7124_chip_info ad7124_chip_info_tbl[] = {
 	[ID_AD7124_4] = {
+		.name = "ad7127-4",
+		.chip_id = CHIPID_AD7124_4,
 		.num_inputs = 8,
 	},
 	[ID_AD7124_8] = {
+		.name = "ad7127-8",
+		.chip_id = CHIPID_AD7124_8,
 		.num_inputs = 16,
 	},
 };
@@ -503,6 +519,34 @@ static int ad7124_soft_reset(struct ad7124_state *st)
 	return -EIO;
 }
 
+static int ad7124_check_chip_id(struct ad7124_state *st)
+{
+	unsigned int readval, chip_id, silicon_rev;
+	int ret;
+
+	ret = ad_sd_read_reg(&st->sd, AD7124_ID, 1, &readval);
+	if (ret < 0)
+		return ret;
+
+	chip_id = AD7124_DEVICE_ID_GET(readval);
+	silicon_rev = AD7124_SILICON_REV_GET(readval);
+
+	if (chip_id != st->chip_info->chip_id) {
+		dev_err(&st->sd.spi->dev,
+			"Chip ID mismatch: expected %u, got %u\n",
+			st->chip_info->chip_id, chip_id);
+		return -ENODEV;
+	}
+
+	if (silicon_rev == 0) {
+		dev_err(&st->sd.spi->dev,
+			"Silicon revision empty. Chip may not be present\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
 static int ad7124_init_channel_vref(struct ad7124_state *st,
 				    unsigned int channel_number)
 {
@@ -665,26 +709,28 @@ static int ad7124_setup(struct ad7124_state *st)
 
 static int ad7124_probe(struct spi_device *spi)
 {
-	const struct spi_device_id *id;
+	const struct ad7124_chip_info *info;
 	struct ad7124_state *st;
 	struct iio_dev *indio_dev;
 	int i, ret;
 
+	info = of_device_get_match_data(&spi->dev);
+	if (!info)
+		return -ENODEV;
+
 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
 	if (!indio_dev)
 		return -ENOMEM;
 
 	st = iio_priv(indio_dev);
 
-	id = spi_get_device_id(spi);
-	st->chip_info = &ad7124_chip_info_tbl[id->driver_data];
+	st->chip_info = info;
 
 	ad_sd_init(&st->sd, indio_dev, spi, &ad7124_sigma_delta_info);
 
 	spi_set_drvdata(spi, indio_dev);
 
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->name = spi_get_device_id(spi)->name;
+	indio_dev->name = st->chip_info->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &ad7124_info;
 
@@ -722,6 +768,10 @@ static int ad7124_probe(struct spi_device *spi)
 	if (ret < 0)
 		goto error_clk_disable_unprepare;
 
+	ret = ad7124_check_chip_id(st);
+	if (ret)
+		goto error_clk_disable_unprepare;
+
 	ret = ad7124_setup(st);
 	if (ret < 0)
 		goto error_clk_disable_unprepare;
@@ -769,16 +819,11 @@ static int ad7124_remove(struct spi_device *spi)
 	return 0;
 }
 
-static const struct spi_device_id ad7124_id_table[] = {
-	{ "ad7124-4", ID_AD7124_4 },
-	{ "ad7124-8", ID_AD7124_8 },
-	{}
-};
-MODULE_DEVICE_TABLE(spi, ad7124_id_table);
-
 static const struct of_device_id ad7124_of_match[] = {
-	{ .compatible = "adi,ad7124-4" },
-	{ .compatible = "adi,ad7124-8" },
+	{ .compatible = "adi,ad7124-4",
+		.data = &ad7124_chip_info_tbl[ID_AD7124_4], },
+	{ .compatible = "adi,ad7124-8",
+		.data = &ad7124_chip_info_tbl[ID_AD7124_8], },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, ad7124_of_match);
@@ -790,7 +835,6 @@ static struct spi_driver ad71124_driver = {
 	},
 	.probe = ad7124_probe,
 	.remove	= ad7124_remove,
-	.id_table = ad7124_id_table,
 };
 module_spi_driver(ad71124_driver);
 
diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c
index 08ba1a8f05eb..2ed580521d81 100644
--- a/drivers/iio/adc/ad7192.c
+++ b/drivers/iio/adc/ad7192.c
@@ -908,15 +908,6 @@ static int ad7192_channels_config(struct iio_dev *indio_dev)
 	return 0;
 }
 
-static const struct of_device_id ad7192_of_match[] = {
-	{ .compatible = "adi,ad7190", .data = &ad7192_chip_info_tbl[ID_AD7190] },
-	{ .compatible = "adi,ad7192", .data = &ad7192_chip_info_tbl[ID_AD7192] },
-	{ .compatible = "adi,ad7193", .data = &ad7192_chip_info_tbl[ID_AD7193] },
-	{ .compatible = "adi,ad7195", .data = &ad7192_chip_info_tbl[ID_AD7195] },
-	{}
-};
-MODULE_DEVICE_TABLE(of, ad7192_of_match);
-
 static int ad7192_probe(struct spi_device *spi)
 {
 	struct ad7192_state *st;
@@ -970,7 +961,6 @@ static int ad7192_probe(struct spi_device *spi)
 
 	spi_set_drvdata(spi, indio_dev);
 	st->chip_info = of_device_get_match_data(&spi->dev);
-	indio_dev->dev.parent = &spi->dev;
 	indio_dev->name = st->chip_info->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
@@ -1050,6 +1040,15 @@ static int ad7192_remove(struct spi_device *spi)
 	return 0;
 }
 
+static const struct of_device_id ad7192_of_match[] = {
+	{ .compatible = "adi,ad7190", .data = &ad7192_chip_info_tbl[ID_AD7190] },
+	{ .compatible = "adi,ad7192", .data = &ad7192_chip_info_tbl[ID_AD7192] },
+	{ .compatible = "adi,ad7193", .data = &ad7192_chip_info_tbl[ID_AD7193] },
+	{ .compatible = "adi,ad7195", .data = &ad7192_chip_info_tbl[ID_AD7195] },
+	{}
+};
+MODULE_DEVICE_TABLE(of, ad7192_of_match);
+
 static struct spi_driver ad7192_driver = {
 	.driver = {
 		.name	= "ad7192",
diff --git a/drivers/iio/adc/ad7266.c b/drivers/iio/adc/ad7266.c
index c8524f098883..a8ec3efd659e 100644
--- a/drivers/iio/adc/ad7266.c
+++ b/drivers/iio/adc/ad7266.c
@@ -74,8 +74,6 @@ static int ad7266_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = {
 	.preenable = &ad7266_preenable,
-	.postenable = &iio_triggered_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
 	.postdisable = &ad7266_postdisable,
 };
 
@@ -437,8 +435,6 @@ static int ad7266_probe(struct spi_device *spi)
 	spi_set_drvdata(spi, indio_dev);
 	st->spi = spi;
 
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &ad7266_info;
diff --git a/drivers/iio/adc/ad7291.c b/drivers/iio/adc/ad7291.c
index b2b137fed246..62fde2aad282 100644
--- a/drivers/iio/adc/ad7291.c
+++ b/drivers/iio/adc/ad7291.c
@@ -502,8 +502,6 @@ static int ad7291_probe(struct i2c_client *client,
 	indio_dev->channels = ad7291_channels;
 	indio_dev->num_channels = ARRAY_SIZE(ad7291_channels);
 
-	indio_dev->dev.parent = &client->dev;
-	indio_dev->dev.of_node = client->dev.of_node;
 	indio_dev->info = &ad7291_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
diff --git a/drivers/iio/adc/ad7292.c b/drivers/iio/adc/ad7292.c
index 6595fd196288..2eafbe7ac7c7 100644
--- a/drivers/iio/adc/ad7292.c
+++ b/drivers/iio/adc/ad7292.c
@@ -304,7 +304,6 @@ static int ad7292_probe(struct spi_device *spi)
 		st->vref_mv = 1250;
 	}
 
-	indio_dev->dev.parent = &spi->dev;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &ad7292_info;
diff --git a/drivers/iio/adc/ad7298.c b/drivers/iio/adc/ad7298.c
index dc8d8c5f6ad3..48d43cb0f932 100644
--- a/drivers/iio/adc/ad7298.c
+++ b/drivers/iio/adc/ad7298.c
@@ -98,9 +98,9 @@ static const struct iio_chan_spec ad7298_channels[] = {
 	IIO_CHAN_SOFT_TIMESTAMP(8),
 };
 
-/**
+/*
  * ad7298_update_scan_mode() setup the spi transfer buffer for the new scan mask
- **/
+ */
 static int ad7298_update_scan_mode(struct iio_dev *indio_dev,
 	const unsigned long *active_scan_mask)
 {
@@ -144,12 +144,12 @@ static int ad7298_update_scan_mode(struct iio_dev *indio_dev,
 	return 0;
 }
 
-/**
+/*
  * ad7298_trigger_handler() bh of trigger launched polling to ring buffer
  *
  * Currently there is no option in this driver to disable the saving of
  * timestamps within the ring.
- **/
+ */
 static irqreturn_t ad7298_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
@@ -312,8 +312,6 @@ static int ad7298_probe(struct spi_device *spi)
 	st->spi = spi;
 
 	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = ad7298_channels;
 	indio_dev->num_channels = ARRAY_SIZE(ad7298_channels);
diff --git a/drivers/iio/adc/ad7476.c b/drivers/iio/adc/ad7476.c
index 4e816d714ad2..66c55ae67791 100644
--- a/drivers/iio/adc/ad7476.c
+++ b/drivers/iio/adc/ad7476.c
@@ -300,9 +300,6 @@ static int ad7476_probe(struct spi_device *spi)
 
 	st->spi = spi;
 
-	/* Establish that the iio_dev is a child of the spi device */
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = st->chip_info->channel;
diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index e4683a68522a..ee7b108688b3 100644
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -499,7 +499,6 @@ static int ad7606_buffer_postenable(struct iio_dev *indio_dev)
 {
 	struct ad7606_state *st = iio_priv(indio_dev);
 
-	iio_triggered_buffer_postenable(indio_dev);
 	gpiod_set_value(st->gpio_convst, 1);
 
 	return 0;
@@ -511,7 +510,7 @@ static int ad7606_buffer_predisable(struct iio_dev *indio_dev)
 
 	gpiod_set_value(st->gpio_convst, 0);
 
-	return iio_triggered_buffer_predisable(indio_dev);
+	return 0;
 }
 
 static const struct iio_buffer_setup_ops ad7606_buffer_ops = {
@@ -614,7 +613,6 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
 	if (ret)
 		return ret;
 
-	indio_dev->dev.parent = dev;
 	if (st->gpio_os) {
 		if (st->gpio_range)
 			indio_dev->info = &ad7606_info_os_and_range;
diff --git a/drivers/iio/adc/ad7766.c b/drivers/iio/adc/ad7766.c
index bc388ea41754..b6b6765be7b4 100644
--- a/drivers/iio/adc/ad7766.c
+++ b/drivers/iio/adc/ad7766.c
@@ -178,8 +178,6 @@ static const struct ad7766_chip_info ad7766_chip_info[] = {
 
 static const struct iio_buffer_setup_ops ad7766_buffer_setup_ops = {
 	.preenable = &ad7766_preenable,
-	.postenable = &iio_triggered_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
 	.postdisable = &ad7766_postdisable,
 };
 
@@ -242,7 +240,6 @@ static int ad7766_probe(struct spi_device *spi)
 	if (IS_ERR(ad7766->pd_gpio))
 		return PTR_ERR(ad7766->pd_gpio);
 
-	indio_dev->dev.parent = &spi->dev;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = ad7766_channels;
diff --git a/drivers/iio/adc/ad7768-1.c b/drivers/iio/adc/ad7768-1.c
index 0d132708c429..0e93b0766eb4 100644
--- a/drivers/iio/adc/ad7768-1.c
+++ b/drivers/iio/adc/ad7768-1.c
@@ -490,7 +490,6 @@ static int ad7768_buffer_postenable(struct iio_dev *indio_dev)
 {
 	struct ad7768_state *st = iio_priv(indio_dev);
 
-	iio_triggered_buffer_postenable(indio_dev);
 	/*
 	 * Write a 1 to the LSB of the INTERFACE_FORMAT register to enter
 	 * continuous read mode. Subsequent data reads do not require an
@@ -502,17 +501,12 @@ static int ad7768_buffer_postenable(struct iio_dev *indio_dev)
 static int ad7768_buffer_predisable(struct iio_dev *indio_dev)
 {
 	struct ad7768_state *st = iio_priv(indio_dev);
-	int ret;
 
 	/*
 	 * To exit continuous read mode, perform a single read of the ADC_DATA
 	 * reg (0x2C), which allows further configuration of the device.
 	 */
-	ret = ad7768_spi_reg_read(st, AD7768_REG_ADC_DATA, 3);
-	if (ret < 0)
-		return ret;
-
-	return iio_triggered_buffer_predisable(indio_dev);
+	return ad7768_spi_reg_read(st, AD7768_REG_ADC_DATA, 3);
 }
 
 static const struct iio_buffer_setup_ops ad7768_buffer_ops = {
@@ -584,7 +578,6 @@ static int ad7768_probe(struct spi_device *spi)
 
 	indio_dev->channels = ad7768_channels;
 	indio_dev->num_channels = ARRAY_SIZE(ad7768_channels);
-	indio_dev->dev.parent = &spi->dev;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->info = &ad7768_info;
 	indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_TRIGGERED;
diff --git a/drivers/iio/adc/ad7780.c b/drivers/iio/adc/ad7780.c
index b33fe6c3907e..42e7e8e595d1 100644
--- a/drivers/iio/adc/ad7780.c
+++ b/drivers/iio/adc/ad7780.c
@@ -320,7 +320,6 @@ static int ad7780_probe(struct spi_device *spi)
 
 	spi_set_drvdata(spi, indio_dev);
 
-	indio_dev->dev.parent = &spi->dev;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = &st->chip_info->channel;
diff --git a/drivers/iio/adc/ad7791.c b/drivers/iio/adc/ad7791.c
index 48432b6f6002..d57ad966e17c 100644
--- a/drivers/iio/adc/ad7791.c
+++ b/drivers/iio/adc/ad7791.c
@@ -425,8 +425,6 @@ static int ad7791_probe(struct spi_device *spi)
 
 	spi_set_drvdata(spi, indio_dev);
 
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = st->info->channels;
diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
index 808485f42415..5e980a06258e 100644
--- a/drivers/iio/adc/ad7793.c
+++ b/drivers/iio/adc/ad7793.c
@@ -818,8 +818,6 @@ static int ad7793_probe(struct spi_device *spi)
 
 	spi_set_drvdata(spi, indio_dev);
 
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = st->chip_info->channels;
diff --git a/drivers/iio/adc/ad7887.c b/drivers/iio/adc/ad7887.c
index c6a3428e950a..037bcb47693c 100644
--- a/drivers/iio/adc/ad7887.c
+++ b/drivers/iio/adc/ad7887.c
@@ -109,7 +109,7 @@ static int ad7887_ring_postdisable(struct iio_dev *indio_dev)
 	return spi_sync(st->spi, &st->msg[AD7887_CH0]);
 }
 
-/**
+/*
  * ad7887_trigger_handler() bh of trigger launched polling to ring buffer
  *
  * Currently there is no option in this driver to disable the saving of
@@ -136,8 +136,6 @@ done:
 
 static const struct iio_buffer_setup_ops ad7887_ring_setup_ops = {
 	.preenable = &ad7887_ring_preenable,
-	.postenable = &iio_triggered_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
 	.postdisable = &ad7887_ring_postdisable,
 };
 
@@ -264,9 +262,6 @@ static int ad7887_probe(struct spi_device *spi)
 	spi_set_drvdata(spi, indio_dev);
 	st->spi = spi;
 
-	/* Estabilish that the iio_dev is a child of the spi device */
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->info = &ad7887_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
diff --git a/drivers/iio/adc/ad7923.c b/drivers/iio/adc/ad7923.c
index 1d124c87c6ac..a2cc96658054 100644
--- a/drivers/iio/adc/ad7923.c
+++ b/drivers/iio/adc/ad7923.c
@@ -151,9 +151,9 @@ static const struct ad7923_chip_info ad7923_chip_info[] = {
 	},
 };
 
-/**
+/*
  * ad7923_update_scan_mode() setup the spi transfer buffer for the new scan mask
- **/
+ */
 static int ad7923_update_scan_mode(struct iio_dev *indio_dev,
 				   const unsigned long *active_scan_mask)
 {
@@ -192,12 +192,12 @@ static int ad7923_update_scan_mode(struct iio_dev *indio_dev,
 	return 0;
 }
 
-/**
+/*
  * ad7923_trigger_handler() bh of trigger launched polling to ring buffer
  *
  * Currently there is no option in this driver to disable the saving of
  * timestamps within the ring.
- **/
+ */
 static irqreturn_t ad7923_trigger_handler(int irq, void *p)
 {
 	struct iio_poll_func *pf = p;
@@ -315,8 +315,6 @@ static int ad7923_probe(struct spi_device *spi)
 	info = &ad7923_chip_info[spi_get_device_id(spi)->driver_data];
 
 	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = info->channels;
 	indio_dev->num_channels = info->num_channels;
diff --git a/drivers/iio/adc/ad7949.c b/drivers/iio/adc/ad7949.c
index 2c6f60edb7ce..d9566a83988a 100644
--- a/drivers/iio/adc/ad7949.c
+++ b/drivers/iio/adc/ad7949.c
@@ -3,7 +3,7 @@
  *
  * Copyright (C) 2018 CMC NV
  *
- * http://www.analog.com/media/en/technical-documentation/data-sheets/AD7949.pdf
+ * https://www.analog.com/media/en/technical-documentation/data-sheets/AD7949.pdf
  */
 
 #include <linux/delay.h>
@@ -243,8 +243,6 @@ static int ad7949_spi_probe(struct spi_device *spi)
 		return -ENOMEM;
 	}
 
-	indio_dev->dev.parent = dev;
-	indio_dev->dev.of_node = dev->of_node;
 	indio_dev->info = &ad7949_spi_info;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
diff --git a/drivers/iio/adc/ad799x.c b/drivers/iio/adc/ad799x.c
index ef013af1aec0..1575b7670207 100644
--- a/drivers/iio/adc/ad799x.c
+++ b/drivers/iio/adc/ad799x.c
@@ -182,7 +182,7 @@ static int ad799x_update_config(struct ad799x_state *st, u16 config)
 	return 0;
 }
 
-/**
+/*
  * ad799x_trigger_handler() bh of trigger launched polling to ring buffer
  *
  * Currently there is no option in this driver to disable the saving of
@@ -814,8 +814,6 @@ static int ad799x_probe(struct i2c_client *client,
 
 	st->client = client;
 
-	indio_dev->dev.parent = &client->dev;
-	indio_dev->dev.of_node = client->dev.of_node;
 	indio_dev->name = id->name;
 	indio_dev->info = st->chip_config->info;
 
diff --git a/drivers/iio/adc/ad_sigma_delta.c b/drivers/iio/adc/ad_sigma_delta.c
index dd3d54b3bc8b..86039e9ecaca 100644
--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -345,10 +345,6 @@ static int ad_sd_buffer_postenable(struct iio_dev *indio_dev)
 	unsigned int channel;
 	int ret;
 
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret < 0)
-		return ret;
-
 	channel = find_first_bit(indio_dev->active_scan_mask,
 				 indio_dev->masklength);
 	ret = ad_sigma_delta_set_channel(sigma_delta,
@@ -402,7 +398,6 @@ static irqreturn_t ad_sd_trigger_handler(int irq, void *p)
 	unsigned int reg_size;
 	unsigned int data_reg;
 	uint8_t data[16];
-	int ret;
 
 	memset(data, 0x00, 16);
 
@@ -419,14 +414,12 @@ static irqreturn_t ad_sd_trigger_handler(int irq, void *p)
 	case 4:
 	case 2:
 	case 1:
-		ret = ad_sd_read_reg_raw(sigma_delta, data_reg, reg_size,
-			&data[0]);
+		ad_sd_read_reg_raw(sigma_delta, data_reg, reg_size, &data[0]);
 		break;
 	case 3:
 		/* We store 24 bit samples in a 32 bit word. Keep the upper
 		 * byte set to zero. */
-		ret = ad_sd_read_reg_raw(sigma_delta, data_reg, reg_size,
-			&data[1]);
+		ad_sd_read_reg_raw(sigma_delta, data_reg, reg_size, &data[1]);
 		break;
 	}
 
@@ -441,7 +434,6 @@ static irqreturn_t ad_sd_trigger_handler(int irq, void *p)
 
 static const struct iio_buffer_setup_ops ad_sd_buffer_setup_ops = {
 	.postenable = &ad_sd_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
 	.postdisable = &ad_sd_buffer_postdisable,
 	.validate_scan_mask = &iio_validate_scan_mask_onehot,
 };
diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index 7af8f0510535..86b6b65916ee 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -435,7 +435,6 @@ static int adi_axi_adc_probe(struct platform_device *pdev)
 	}
 
 	indio_dev->info = &adi_axi_adc_info;
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->name = "adi-axi-adc";
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->num_channels = conv->chip_info->num_channels;
diff --git a/drivers/iio/adc/aspeed_adc.c b/drivers/iio/adc/aspeed_adc.c
index 1e5375235cfe..19efaa41bc34 100644
--- a/drivers/iio/adc/aspeed_adc.c
+++ b/drivers/iio/adc/aspeed_adc.c
@@ -252,7 +252,6 @@ static int aspeed_adc_probe(struct platform_device *pdev)
 
 	model_data = of_device_get_match_data(&pdev->dev);
 	indio_dev->name = model_data->model_name;
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->info = &aspeed_adc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = aspeed_adc_iio_channels;
diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c
index 9abbbdcc7420..de9583d6cddd 100644
--- a/drivers/iio/adc/at91-sama5d2_adc.c
+++ b/drivers/iio/adc/at91-sama5d2_adc.c
@@ -347,7 +347,7 @@ struct at91_adc_trigger {
 };
 
 /**
- * at91_adc_dma - at91-sama5d2 dma information struct
+ * struct at91_adc_dma - at91-sama5d2 dma information struct
  * @dma_chan:		the dma channel acquired
  * @rx_buf:		dma coherent allocated area
  * @rx_dma_buf:		dma handler for the buffer
@@ -369,7 +369,7 @@ struct at91_adc_dma {
 };
 
 /**
- * at91_adc_touch - at91-sama5d2 touchscreen information struct
+ * struct at91_adc_touch - at91-sama5d2 touchscreen information struct
  * @sample_period_val:		the value for periodic trigger interval
  * @touching:			is the pen touching the screen or not
  * @x_pos:			temporary placeholder for pressure computation
@@ -402,6 +402,7 @@ struct at91_adc_state {
 	wait_queue_head_t		wq_data_available;
 	struct at91_adc_dma		dma_st;
 	struct at91_adc_touch		touch_st;
+	struct iio_dev			*indio_dev;
 	u16				buffer[AT91_BUFFER_MAX_HWORDS];
 	/*
 	 * lock to prevent concurrent 'single conversion' requests through
@@ -642,13 +643,13 @@ static u16 at91_adc_touch_pos(struct at91_adc_state *st, int reg)
 	/* first half of register is the x or y, second half is the scale */
 	val = at91_adc_readl(st, reg);
 	if (!val)
-		dev_dbg(&iio_priv_to_dev(st)->dev, "pos is 0\n");
+		dev_dbg(&st->indio_dev->dev, "pos is 0\n");
 
 	pos = val & AT91_SAMA5D2_XYZ_MASK;
 	result = (pos << AT91_SAMA5D2_MAX_POS_BITS) - pos;
 	scale = (val >> 16) & AT91_SAMA5D2_XYZ_MASK;
 	if (scale == 0) {
-		dev_err(&iio_priv_to_dev(st)->dev, "scale is 0\n");
+		dev_err(&st->indio_dev->dev, "scale is 0\n");
 		return 0;
 	}
 	result /= scale;
@@ -937,14 +938,6 @@ static int at91_adc_buffer_preenable(struct iio_dev *indio_dev)
 	return 0;
 }
 
-static int at91_adc_buffer_postenable(struct iio_dev *indio_dev)
-{
-	if (at91_adc_current_chan_is_touch(indio_dev))
-		return 0;
-
-	return iio_triggered_buffer_postenable(indio_dev);
-}
-
 static int at91_adc_buffer_postdisable(struct iio_dev *indio_dev)
 {
 	struct at91_adc_state *st = iio_priv(indio_dev);
@@ -995,19 +988,9 @@ static int at91_adc_buffer_postdisable(struct iio_dev *indio_dev)
 	return 0;
 }
 
-static int at91_adc_buffer_predisable(struct iio_dev *indio_dev)
-{
-	if (at91_adc_current_chan_is_touch(indio_dev))
-		return 0;
-
-	return iio_triggered_buffer_predisable(indio_dev);
-}
-
 static const struct iio_buffer_setup_ops at91_buffer_setup_ops = {
 	.preenable = &at91_adc_buffer_preenable,
 	.postdisable = &at91_adc_buffer_postdisable,
-	.postenable = &at91_adc_buffer_postenable,
-	.predisable = &at91_adc_buffer_predisable,
 };
 
 static struct iio_trigger *at91_adc_allocate_trigger(struct iio_dev *indio,
@@ -1204,9 +1187,9 @@ static unsigned at91_adc_startup_time(unsigned startup_time_min,
 	return i;
 }
 
-static void at91_adc_setup_samp_freq(struct at91_adc_state *st, unsigned freq)
+static void at91_adc_setup_samp_freq(struct iio_dev *indio_dev, unsigned freq)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(st);
+	struct at91_adc_state *st = iio_priv(indio_dev);
 	unsigned f_per, prescal, startup, mr;
 
 	f_per = clk_get_rate(st->per_clk);
@@ -1275,9 +1258,9 @@ static void at91_adc_pen_detect_interrupt(struct at91_adc_state *st)
 	st->touch_st.touching = true;
 }
 
-static void at91_adc_no_pen_detect_interrupt(struct at91_adc_state *st)
+static void at91_adc_no_pen_detect_interrupt(struct iio_dev *indio_dev)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(st);
+	struct at91_adc_state *st = iio_priv(indio_dev);
 
 	at91_adc_writel(st, AT91_SAMA5D2_TRGR,
 			AT91_SAMA5D2_TRGR_TRGMOD_NO_TRIGGER);
@@ -1297,7 +1280,7 @@ static void at91_adc_workq_handler(struct work_struct *workq)
 					struct at91_adc_touch, workq);
 	struct at91_adc_state *st = container_of(touch_st,
 					struct at91_adc_state, touch_st);
-	struct iio_dev *indio_dev = iio_priv_to_dev(st);
+	struct iio_dev *indio_dev = st->indio_dev;
 
 	iio_push_to_buffers(indio_dev, st->buffer);
 }
@@ -1318,7 +1301,7 @@ static irqreturn_t at91_adc_interrupt(int irq, void *private)
 		at91_adc_pen_detect_interrupt(st);
 	} else if ((status & AT91_SAMA5D2_IER_NOPEN)) {
 		/* nopen detected IRQ */
-		at91_adc_no_pen_detect_interrupt(st);
+		at91_adc_no_pen_detect_interrupt(indio);
 	} else if ((status & AT91_SAMA5D2_ISR_PENS) &&
 		   ((status & rdy_mask) == rdy_mask)) {
 		/* periodic trigger IRQ - during pen sense */
@@ -1486,7 +1469,7 @@ static int at91_adc_write_raw(struct iio_dev *indio_dev,
 		    val > st->soc_info.max_sample_rate)
 			return -EINVAL;
 
-		at91_adc_setup_samp_freq(st, val);
+		at91_adc_setup_samp_freq(indio_dev, val);
 		return 0;
 	default:
 		return -EINVAL;
@@ -1624,8 +1607,10 @@ static int at91_adc_update_scan_mode(struct iio_dev *indio_dev,
 	return 0;
 }
 
-static void at91_adc_hw_init(struct at91_adc_state *st)
+static void at91_adc_hw_init(struct iio_dev *indio_dev)
 {
+	struct at91_adc_state *st = iio_priv(indio_dev);
+
 	at91_adc_writel(st, AT91_SAMA5D2_CR, AT91_SAMA5D2_CR_SWRST);
 	at91_adc_writel(st, AT91_SAMA5D2_IDR, 0xffffffff);
 	/*
@@ -1635,7 +1620,7 @@ static void at91_adc_hw_init(struct at91_adc_state *st)
 	at91_adc_writel(st, AT91_SAMA5D2_MR,
 			AT91_SAMA5D2_MR_TRANSFER(2) | AT91_SAMA5D2_MR_ANACH);
 
-	at91_adc_setup_samp_freq(st, st->soc_info.min_sample_rate);
+	at91_adc_setup_samp_freq(indio_dev, st->soc_info.min_sample_rate);
 
 	/* configure extended mode register */
 	at91_adc_config_emr(st);
@@ -1710,7 +1695,6 @@ static int at91_adc_probe(struct platform_device *pdev)
 	if (!indio_dev)
 		return -ENOMEM;
 
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->name = dev_name(&pdev->dev);
 	indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
 	indio_dev->info = &at91_adc_info;
@@ -1718,6 +1702,7 @@ static int at91_adc_probe(struct platform_device *pdev)
 	indio_dev->num_channels = ARRAY_SIZE(at91_adc_channels);
 
 	st = iio_priv(indio_dev);
+	st->indio_dev = indio_dev;
 
 	bitmap_set(&st->touch_st.channels_bitmask,
 		   AT91_SAMA5D2_TOUCH_X_CHAN_IDX, 1);
@@ -1829,7 +1814,7 @@ static int at91_adc_probe(struct platform_device *pdev)
 		goto vref_disable;
 	}
 
-	at91_adc_hw_init(st);
+	at91_adc_hw_init(indio_dev);
 
 	ret = clk_prepare_enable(st->per_clk);
 	if (ret)
@@ -1945,7 +1930,7 @@ static __maybe_unused int at91_adc_resume(struct device *dev)
 	if (ret)
 		goto vref_disable_resume;
 
-	at91_adc_hw_init(st);
+	at91_adc_hw_init(indio_dev);
 
 	/* reconfiguring trigger hardware state */
 	if (!iio_buffer_enabled(indio_dev))
diff --git a/drivers/iio/adc/at91_adc.c b/drivers/iio/adc/at91_adc.c
index 0368b6dc6d60..9b2c548fae95 100644
--- a/drivers/iio/adc/at91_adc.c
+++ b/drivers/iio/adc/at91_adc.c
@@ -157,7 +157,7 @@
  * struct at91_adc_reg_desc - Various informations relative to registers
  * @channel_base:	Base offset for the channel data registers
  * @drdy_mask:		Mask of the DRDY field in the relevant registers
-			(Interruptions registers mostly)
+ *			(Interruptions registers mostly)
  * @status_register:	Offset of the Interrupt Status Register
  * @trigger_register:	Offset of the Trigger setup register
  * @mr_prescal_mask:	Mask of the PRESCAL field in the adc MR register
@@ -287,13 +287,13 @@ static void handle_adc_eoc_trigger(int irq, struct iio_dev *idev)
 	}
 }
 
-static int at91_ts_sample(struct at91_adc_state *st)
+static int at91_ts_sample(struct iio_dev *idev)
 {
+	struct at91_adc_state *st = iio_priv(idev);
 	unsigned int xscale, yscale, reg, z1, z2;
 	unsigned int x, y, pres, xpos, ypos;
 	unsigned int rxp = 1;
 	unsigned int factor = 1000;
-	struct iio_dev *idev = iio_priv_to_dev(st);
 
 	unsigned int xyz_mask_bits = st->res;
 	unsigned int xyz_mask = (1 << xyz_mask_bits) - 1;
@@ -449,7 +449,7 @@ static irqreturn_t at91_adc_9x5_interrupt(int irq, void *private)
 
 		if (status & AT91_ADC_ISR_PENS) {
 			/* validate data by pen contact */
-			at91_ts_sample(st);
+			at91_ts_sample(idev);
 		} else {
 			/* triggered by event that is no pen contact, just read
 			 * them to clean the interrupt and discard all.
@@ -737,10 +737,10 @@ static int at91_adc_read_raw(struct iio_dev *idev,
 	return -EINVAL;
 }
 
-static int at91_adc_of_get_resolution(struct at91_adc_state *st,
+static int at91_adc_of_get_resolution(struct iio_dev *idev,
 				      struct platform_device *pdev)
 {
-	struct iio_dev *idev = iio_priv_to_dev(st);
+	struct at91_adc_state *st = iio_priv(idev);
 	struct device_node *np = pdev->dev.of_node;
 	int count, i, ret = 0;
 	char *res_name, *s;
@@ -866,10 +866,10 @@ static int at91_adc_probe_dt_ts(struct device_node *node,
 	}
 }
 
-static int at91_adc_probe_dt(struct at91_adc_state *st,
+static int at91_adc_probe_dt(struct iio_dev *idev,
 			     struct platform_device *pdev)
 {
-	struct iio_dev *idev = iio_priv_to_dev(st);
+	struct at91_adc_state *st = iio_priv(idev);
 	struct device_node *node = pdev->dev.of_node;
 	struct device_node *trig_node;
 	int i = 0, ret;
@@ -910,7 +910,7 @@ static int at91_adc_probe_dt(struct at91_adc_state *st,
 	}
 	st->vref_mv = prop;
 
-	ret = at91_adc_of_get_resolution(st, pdev);
+	ret = at91_adc_of_get_resolution(idev, pdev);
 	if (ret)
 		goto error_ret;
 
@@ -1010,9 +1010,9 @@ static void atmel_ts_close(struct input_dev *dev)
 		at91_adc_writel(st, AT91_ADC_IDR, AT91RL_ADC_IER_PEN);
 }
 
-static int at91_ts_hw_init(struct at91_adc_state *st, u32 adc_clk_khz)
+static int at91_ts_hw_init(struct iio_dev *idev, u32 adc_clk_khz)
 {
-	struct iio_dev *idev = iio_priv_to_dev(st);
+	struct at91_adc_state *st = iio_priv(idev);
 	u32 reg = 0;
 	u32 tssctim = 0;
 	int i = 0;
@@ -1085,11 +1085,11 @@ static int at91_ts_hw_init(struct at91_adc_state *st, u32 adc_clk_khz)
 	return 0;
 }
 
-static int at91_ts_register(struct at91_adc_state *st,
+static int at91_ts_register(struct iio_dev *idev,
 		struct platform_device *pdev)
 {
+	struct at91_adc_state *st = iio_priv(idev);
 	struct input_dev *input;
-	struct iio_dev *idev = iio_priv_to_dev(st);
 	int ret;
 
 	input = input_allocate_device();
@@ -1161,7 +1161,7 @@ static int at91_adc_probe(struct platform_device *pdev)
 	st = iio_priv(idev);
 
 	if (pdev->dev.of_node)
-		ret = at91_adc_probe_dt(st, pdev);
+		ret = at91_adc_probe_dt(idev, pdev);
 	else
 		ret = at91_adc_probe_pdata(st, pdev);
 
@@ -1172,7 +1172,6 @@ static int at91_adc_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, idev);
 
-	idev->dev.parent = &pdev->dev;
 	idev->name = dev_name(&pdev->dev);
 	idev->modes = INDIO_DIRECT_MODE;
 	idev->info = &at91_adc_info;
@@ -1301,11 +1300,11 @@ static int at91_adc_probe(struct platform_device *pdev)
 			goto error_disable_adc_clk;
 		}
 	} else {
-		ret = at91_ts_register(st, pdev);
+		ret = at91_ts_register(idev, pdev);
 		if (ret)
 			goto error_disable_adc_clk;
 
-		at91_ts_hw_init(st, adc_clk_khz);
+		at91_ts_hw_init(idev, adc_clk_khz);
 	}
 
 	ret = iio_device_register(idev);
diff --git a/drivers/iio/adc/axp20x_adc.c b/drivers/iio/adc/axp20x_adc.c
index 88059480da17..798ff2d89691 100644
--- a/drivers/iio/adc/axp20x_adc.c
+++ b/drivers/iio/adc/axp20x_adc.c
@@ -668,8 +668,6 @@ static int axp20x_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, indio_dev);
 
 	info->regmap = axp20x_dev->regmap;
-	indio_dev->dev.parent = &pdev->dev;
-	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
 	if (!pdev->dev.of_node) {
diff --git a/drivers/iio/adc/axp288_adc.c b/drivers/iio/adc/axp288_adc.c
index 8ea2aed6d6f5..5f5e8b39e4d2 100644
--- a/drivers/iio/adc/axp288_adc.c
+++ b/drivers/iio/adc/axp288_adc.c
@@ -271,7 +271,6 @@ static int axp288_adc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->name = pdev->name;
 	indio_dev->channels = axp288_adc_channels;
 	indio_dev->num_channels = ARRAY_SIZE(axp288_adc_channels);
diff --git a/drivers/iio/adc/bcm_iproc_adc.c b/drivers/iio/adc/bcm_iproc_adc.c
index 5e396104ac86..936da32faa9d 100644
--- a/drivers/iio/adc/bcm_iproc_adc.c
+++ b/drivers/iio/adc/bcm_iproc_adc.c
@@ -573,8 +573,6 @@ static int iproc_adc_probe(struct platform_device *pdev)
 	}
 
 	indio_dev->name = "iproc-static-adc";
-	indio_dev->dev.parent = &pdev->dev;
-	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->info = &iproc_adc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = iproc_adc_iio_channels;
diff --git a/drivers/iio/adc/berlin2-adc.c b/drivers/iio/adc/berlin2-adc.c
index 72d8fa94ab31..8b04b95b7b7a 100644
--- a/drivers/iio/adc/berlin2-adc.c
+++ b/drivers/iio/adc/berlin2-adc.c
@@ -321,7 +321,6 @@ static int berlin2_adc_probe(struct platform_device *pdev)
 	init_waitqueue_head(&priv->wq);
 	mutex_init(&priv->lock);
 
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->name = dev_name(&pdev->dev);
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &berlin2_adc_info;
diff --git a/drivers/iio/adc/cc10001_adc.c b/drivers/iio/adc/cc10001_adc.c
index fe9257624f16..e16ac935693b 100644
--- a/drivers/iio/adc/cc10001_adc.c
+++ b/drivers/iio/adc/cc10001_adc.c
@@ -334,7 +334,6 @@ static int cc10001_adc_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->name = dev_name(&pdev->dev);
 	indio_dev->info = &cc10001_adc_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
diff --git a/drivers/iio/adc/cpcap-adc.c b/drivers/iio/adc/cpcap-adc.c
index 5086a337f4c9..84a1733e5913 100644
--- a/drivers/iio/adc/cpcap-adc.c
+++ b/drivers/iio/adc/cpcap-adc.c
@@ -15,9 +15,9 @@
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_platform.h>
+#include <linux/mod_devicetable.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/regmap.h>
 
 #include <linux/iio/buffer.h>
@@ -82,7 +82,7 @@
 
 #define CPCAP_ADC_MAX_RETRIES		5	/* Calibration */
 
-/**
+/*
  * struct cpcap_adc_ato - timing settings for cpcap adc
  *
  * Unfortunately no cpcap documentation available, please document when
@@ -121,7 +121,7 @@ struct cpcap_adc {
 	bool done;
 };
 
-/**
+/*
  * enum cpcap_adc_channel - cpcap adc channels
  */
 enum cpcap_adc_channel {
@@ -152,7 +152,7 @@ enum cpcap_adc_channel {
 	CPCAP_ADC_CHANNEL_NUM,
 };
 
-/**
+/*
  * enum cpcap_adc_timing - cpcap adc timing options
  *
  * CPCAP_ADC_TIMING_IMM seems to be immediate with no timings.
@@ -955,22 +955,10 @@ MODULE_DEVICE_TABLE(of, cpcap_adc_id_table);
 
 static int cpcap_adc_probe(struct platform_device *pdev)
 {
-	const struct of_device_id *match;
 	struct cpcap_adc *ddata;
 	struct iio_dev *indio_dev;
 	int error;
 
-	match = of_match_device(of_match_ptr(cpcap_adc_id_table),
-				&pdev->dev);
-	if (!match)
-		return -EINVAL;
-
-	if (!match->data) {
-		dev_err(&pdev->dev, "no configuration data found\n");
-
-		return -ENODEV;
-	}
-
 	indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*ddata));
 	if (!indio_dev) {
 		dev_err(&pdev->dev, "failed to allocate iio device\n");
@@ -978,15 +966,15 @@ static int cpcap_adc_probe(struct platform_device *pdev)
 		return -ENOMEM;
 	}
 	ddata = iio_priv(indio_dev);
-	ddata->ato = match->data;
+	ddata->ato = device_get_match_data(&pdev->dev);
+	if (!ddata->ato)
+		return -ENODEV;
 	ddata->dev = &pdev->dev;
 
 	mutex_init(&ddata->lock);
 	init_waitqueue_head(&ddata->wq_data_avail);
 
 	indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
-	indio_dev->dev.parent = &pdev->dev;
-	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->channels = cpcap_adc_channels;
 	indio_dev->num_channels = ARRAY_SIZE(cpcap_adc_channels);
 	indio_dev->name = dev_name(&pdev->dev);
@@ -1029,7 +1017,7 @@ static int cpcap_adc_probe(struct platform_device *pdev)
 static struct platform_driver cpcap_adc_driver = {
 	.driver = {
 		.name = "cpcap_adc",
-		.of_match_table = of_match_ptr(cpcap_adc_id_table),
+		.of_match_table = cpcap_adc_id_table,
 	},
 	.probe = cpcap_adc_probe,
 };
diff --git a/drivers/iio/adc/da9150-gpadc.c b/drivers/iio/adc/da9150-gpadc.c
index ae8bcc32f63d..7a7a54a7ed76 100644
--- a/drivers/iio/adc/da9150-gpadc.c
+++ b/drivers/iio/adc/da9150-gpadc.c
@@ -354,8 +354,6 @@ static int da9150_gpadc_probe(struct platform_device *pdev)
 	}
 
 	indio_dev->name = dev_name(dev);
-	indio_dev->dev.parent = dev;
-	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->info = &da9150_gpadc_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = da9150_gpadc_channels;
diff --git a/drivers/iio/adc/dln2-adc.c b/drivers/iio/adc/dln2-adc.c
index 65c7c9329b1c..0d53ef18e045 100644
--- a/drivers/iio/adc/dln2-adc.c
+++ b/drivers/iio/adc/dln2-adc.c
@@ -524,10 +524,6 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
 	u16 conflict;
 	unsigned int trigger_chan;
 
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret)
-		return ret;
-
 	mutex_lock(&dln2->mutex);
 
 	/* Enable ADC */
@@ -541,7 +537,6 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
 				(int)conflict);
 			ret = -EBUSY;
 		}
-		iio_triggered_buffer_predisable(indio_dev);
 		return ret;
 	}
 
@@ -555,7 +550,6 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
 		mutex_unlock(&dln2->mutex);
 		if (ret < 0) {
 			dev_dbg(&dln2->pdev->dev, "Problem in %s\n", __func__);
-			iio_triggered_buffer_predisable(indio_dev);
 			return ret;
 		}
 	} else {
@@ -568,7 +562,7 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
 
 static int dln2_adc_triggered_buffer_predisable(struct iio_dev *indio_dev)
 {
-	int ret, ret2;
+	int ret;
 	struct dln2_adc *dln2 = iio_priv(indio_dev);
 
 	mutex_lock(&dln2->mutex);
@@ -586,10 +580,6 @@ static int dln2_adc_triggered_buffer_predisable(struct iio_dev *indio_dev)
 	if (ret < 0)
 		dev_dbg(&dln2->pdev->dev, "Problem in %s\n", __func__);
 
-	ret2 = iio_triggered_buffer_predisable(indio_dev);
-	if (ret == 0)
-		ret = ret2;
-
 	return ret;
 }
 
@@ -652,7 +642,6 @@ static int dln2_adc_probe(struct platform_device *pdev)
 	IIO_CHAN_SOFT_TIMESTAMP_ASSIGN(dln2->iio_channels[i], i);
 
 	indio_dev->name = DLN2_ADC_MOD_NAME;
-	indio_dev->dev.parent = dev;
 	indio_dev->info = &dln2_adc_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = dln2->iio_channels;
diff --git a/drivers/iio/adc/envelope-detector.c b/drivers/iio/adc/envelope-detector.c
index 28f3d6758eb5..2a4fd3bb64cf 100644
--- a/drivers/iio/adc/envelope-detector.c
+++ b/drivers/iio/adc/envelope-detector.c
@@ -343,8 +343,6 @@ static int envelope_detector_probe(struct platform_device *pdev)
 	INIT_DELAYED_WORK(&env->comp_timeout, envelope_detector_timeout);
 
 	indio_dev->name = dev_name(dev);
-	indio_dev->dev.parent = dev;
-	indio_dev->dev.of_node = dev->of_node;
 	indio_dev->info = &envelope_detector_info;
 	indio_dev->channels = &envelope_detector_iio_channel;
 	indio_dev->num_channels = 1;
diff --git a/drivers/iio/adc/ep93xx_adc.c b/drivers/iio/adc/ep93xx_adc.c
index 5c97e8a511f2..c08ab3c6dfaf 100644
--- a/drivers/iio/adc/ep93xx_adc.c
+++ b/drivers/iio/adc/ep93xx_adc.c
@@ -170,7 +170,6 @@ static int ep93xx_adc_probe(struct platform_device *pdev)
 		return PTR_ERR(priv->base);
 	}
 
-	iiodev->dev.parent = &pdev->dev;
 	iiodev->name = dev_name(&pdev->dev);
 	iiodev->modes = INDIO_DIRECT_MODE;
 	iiodev->info = &ep93xx_adc_info;
diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c
index 6bda4f4d89fe..7d23b6c33284 100644
--- a/drivers/iio/adc/exynos_adc.c
+++ b/drivers/iio/adc/exynos_adc.c
@@ -867,8 +867,6 @@ static int exynos_adc_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, indio_dev);
 
 	indio_dev->name = dev_name(&pdev->dev);
-	indio_dev->dev.parent = &pdev->dev;
-	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->info = &exynos_adc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = exynos_adc_iio_channels;
diff --git a/drivers/iio/adc/fsl-imx25-gcq.c b/drivers/iio/adc/fsl-imx25-gcq.c
index b0a4dc88ba9b..8cb51cf7a816 100644
--- a/drivers/iio/adc/fsl-imx25-gcq.c
+++ b/drivers/iio/adc/fsl-imx25-gcq.c
@@ -350,7 +350,6 @@ static int mx25_gcq_probe(struct platform_device *pdev)
 		goto err_clk_unprepare;
 	}
 
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->channels = mx25_gcq_channels;
 	indio_dev->num_channels = ARRAY_SIZE(mx25_gcq_channels);
 	indio_dev->info = &mx25_gcq_iio_info;
diff --git a/drivers/iio/adc/hi8435.c b/drivers/iio/adc/hi8435.c
index 8da45bf36d36..074c30970465 100644
--- a/drivers/iio/adc/hi8435.c
+++ b/drivers/iio/adc/hi8435.c
@@ -15,9 +15,7 @@
 #include <linux/iio/triggered_event.h>
 #include <linux/interrupt.h>
 #include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
-#include <linux/of_gpio.h>
+#include <linux/mod_devicetable.h>
 #include <linux/spi/spi.h>
 #include <linux/gpio/consumer.h>
 
@@ -488,8 +486,6 @@ static int hi8435_probe(struct spi_device *spi)
 	spi_set_drvdata(spi, idev);
 	mutex_init(&priv->lock);
 
-	idev->dev.parent	= &spi->dev;
-	idev->dev.of_node	= spi->dev.of_node;
 	idev->name		= spi_get_device_id(spi)->name;
 	idev->modes		= INDIO_DIRECT_MODE;
 	idev->info		= &hi8435_info;
@@ -542,7 +538,7 @@ MODULE_DEVICE_TABLE(spi, hi8435_id);
 static struct spi_driver hi8435_driver = {
 	.driver	= {
 		.name		= DRV_NAME,
-		.of_match_table	= of_match_ptr(hi8435_dt_ids),
+		.of_match_table	= hi8435_dt_ids,
 	},
 	.probe		= hi8435_probe,
 	.id_table	= hi8435_id,
diff --git a/drivers/iio/adc/hx711.c b/drivers/iio/adc/hx711.c
index c8686558429b..6a173531d355 100644
--- a/drivers/iio/adc/hx711.c
+++ b/drivers/iio/adc/hx711.c
@@ -551,7 +551,6 @@ static int hx711_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, indio_dev);
 
 	indio_dev->name = "hx711";
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->info = &hx711_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = hx711_chan_spec;
diff --git a/drivers/iio/adc/imx7d_adc.c b/drivers/iio/adc/imx7d_adc.c
index 2a2fbf788e95..4969a5f941e3 100644
--- a/drivers/iio/adc/imx7d_adc.c
+++ b/drivers/iio/adc/imx7d_adc.c
@@ -515,7 +515,6 @@ static int imx7d_adc_probe(struct platform_device *pdev)
 	init_completion(&info->completion);
 
 	indio_dev->name = dev_name(dev);
-	indio_dev->dev.parent = dev;
 	indio_dev->info = &imx7d_adc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = imx7d_adc_iio_channels;
diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
index bdd7cba6f6b0..5ed63e874292 100644
--- a/drivers/iio/adc/ina2xx-adc.c
+++ b/drivers/iio/adc/ina2xx-adc.c
@@ -273,7 +273,7 @@ static int ina2xx_read_raw(struct iio_dev *indio_dev,
  * Available averaging rates for ina226. The indices correspond with
  * the bit values expected by the chip (according to the ina226 datasheet,
  * table 3 AVG bit settings, found at
- * http://www.ti.com/lit/ds/symlink/ina226.pdf.
+ * https://www.ti.com/lit/ds/symlink/ina226.pdf.
  */
 static const int ina226_avg_tab[] = { 1, 4, 16, 64, 128, 256, 512, 1024 };
 
@@ -1015,8 +1015,6 @@ static int ina2xx_probe(struct i2c_client *client,
 	}
 
 	indio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
-	indio_dev->dev.parent = &client->dev;
-	indio_dev->dev.of_node = client->dev.of_node;
 	if (id->driver_data == ina226) {
 		indio_dev->channels = ina226_channels;
 		indio_dev->num_channels = ARRAY_SIZE(ina226_channels);
diff --git a/drivers/iio/adc/ingenic-adc.c b/drivers/iio/adc/ingenic-adc.c
index 39c0a609fc94..92b25083e23f 100644
--- a/drivers/iio/adc/ingenic-adc.c
+++ b/drivers/iio/adc/ingenic-adc.c
@@ -8,11 +8,14 @@
 
 #include <dt-bindings/iio/adc/ingenic,adc.h>
 #include <linux/clk.h>
+#include <linux/iio/buffer.h>
 #include <linux/iio/iio.h>
+#include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/iopoll.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/mod_devicetable.h>
 #include <linux/mutex.h>
 #include <linux/platform_device.h>
 
@@ -20,19 +23,46 @@
 #define JZ_ADC_REG_CFG			0x04
 #define JZ_ADC_REG_CTRL			0x08
 #define JZ_ADC_REG_STATUS		0x0c
+#define JZ_ADC_REG_ADSAME		0x10
+#define JZ_ADC_REG_ADWAIT		0x14
 #define JZ_ADC_REG_ADTCH		0x18
 #define JZ_ADC_REG_ADBDAT		0x1c
 #define JZ_ADC_REG_ADSDAT		0x20
+#define JZ_ADC_REG_ADCMD		0x24
 #define JZ_ADC_REG_ADCLK		0x28
 
 #define JZ_ADC_REG_ENABLE_PD		BIT(7)
 #define JZ_ADC_REG_CFG_AUX_MD		(BIT(0) | BIT(1))
 #define JZ_ADC_REG_CFG_BAT_MD		BIT(4)
+#define JZ_ADC_REG_CFG_SAMPLE_NUM(n)	((n) << 10)
+#define JZ_ADC_REG_CFG_PULL_UP(n)	((n) << 16)
+#define JZ_ADC_REG_CFG_CMD_SEL		BIT(22)
+#define JZ_ADC_REG_CFG_TOUCH_OPS_MASK	(BIT(31) | GENMASK(23, 10))
 #define JZ_ADC_REG_ADCLK_CLKDIV_LSB	0
 #define JZ4725B_ADC_REG_ADCLK_CLKDIV10US_LSB	16
 #define JZ4770_ADC_REG_ADCLK_CLKDIV10US_LSB	8
 #define JZ4770_ADC_REG_ADCLK_CLKDIVMS_LSB	16
 
+#define JZ_ADC_REG_ADCMD_YNADC		BIT(7)
+#define JZ_ADC_REG_ADCMD_YPADC		BIT(8)
+#define JZ_ADC_REG_ADCMD_XNADC		BIT(9)
+#define JZ_ADC_REG_ADCMD_XPADC		BIT(10)
+#define JZ_ADC_REG_ADCMD_VREFPYP	BIT(11)
+#define JZ_ADC_REG_ADCMD_VREFPXP	BIT(12)
+#define JZ_ADC_REG_ADCMD_VREFPXN	BIT(13)
+#define JZ_ADC_REG_ADCMD_VREFPAUX	BIT(14)
+#define JZ_ADC_REG_ADCMD_VREFPVDD33	BIT(15)
+#define JZ_ADC_REG_ADCMD_VREFNYN	BIT(16)
+#define JZ_ADC_REG_ADCMD_VREFNXP	BIT(17)
+#define JZ_ADC_REG_ADCMD_VREFNXN	BIT(18)
+#define JZ_ADC_REG_ADCMD_VREFAUX	BIT(19)
+#define JZ_ADC_REG_ADCMD_YNGRU		BIT(20)
+#define JZ_ADC_REG_ADCMD_XNGRU		BIT(21)
+#define JZ_ADC_REG_ADCMD_XPGRU		BIT(22)
+#define JZ_ADC_REG_ADCMD_YPSUP		BIT(23)
+#define JZ_ADC_REG_ADCMD_XNSUP		BIT(24)
+#define JZ_ADC_REG_ADCMD_XPSUP		BIT(25)
+
 #define JZ_ADC_AUX_VREF				3300
 #define JZ_ADC_AUX_VREF_BITS			12
 #define JZ_ADC_BATTERY_LOW_VREF			2500
@@ -44,6 +74,14 @@
 #define JZ4770_ADC_BATTERY_VREF			6600
 #define JZ4770_ADC_BATTERY_VREF_BITS		12
 
+#define JZ_ADC_IRQ_AUX			BIT(0)
+#define JZ_ADC_IRQ_BATTERY		BIT(1)
+#define JZ_ADC_IRQ_TOUCH		BIT(2)
+#define JZ_ADC_IRQ_PEN_DOWN		BIT(3)
+#define JZ_ADC_IRQ_PEN_UP		BIT(4)
+#define JZ_ADC_IRQ_PEN_DOWN_SLEEP	BIT(5)
+#define JZ_ADC_IRQ_SLEEP		BIT(7)
+
 struct ingenic_adc;
 
 struct ingenic_adc_soc_data {
@@ -55,6 +93,8 @@ struct ingenic_adc_soc_data {
 	size_t battery_scale_avail_size;
 	unsigned int battery_vref_mode: 1;
 	unsigned int has_aux2: 1;
+	const struct iio_chan_spec *channels;
+	unsigned int num_channels;
 	int (*init_clk_div)(struct device *dev, struct ingenic_adc *adc);
 };
 
@@ -67,13 +107,67 @@ struct ingenic_adc {
 	bool low_vref_mode;
 };
 
+static void ingenic_adc_set_adcmd(struct iio_dev *iio_dev, unsigned long mask)
+{
+	struct ingenic_adc *adc = iio_priv(iio_dev);
+
+	mutex_lock(&adc->lock);
+
+	/* Init ADCMD */
+	readl(adc->base + JZ_ADC_REG_ADCMD);
+
+	if (mask & 0x3) {
+		/* Second channel (INGENIC_ADC_TOUCH_YP): sample YP vs. GND */
+		writel(JZ_ADC_REG_ADCMD_XNGRU
+		       | JZ_ADC_REG_ADCMD_VREFNXN | JZ_ADC_REG_ADCMD_VREFPVDD33
+		       | JZ_ADC_REG_ADCMD_YPADC,
+		       adc->base + JZ_ADC_REG_ADCMD);
+
+		/* First channel (INGENIC_ADC_TOUCH_XP): sample XP vs. GND */
+		writel(JZ_ADC_REG_ADCMD_YNGRU
+		       | JZ_ADC_REG_ADCMD_VREFNYN | JZ_ADC_REG_ADCMD_VREFPVDD33
+		       | JZ_ADC_REG_ADCMD_XPADC,
+		       adc->base + JZ_ADC_REG_ADCMD);
+	}
+
+	if (mask & 0xc) {
+		/* Fourth channel (INGENIC_ADC_TOUCH_YN): sample YN vs. GND */
+		writel(JZ_ADC_REG_ADCMD_XNGRU
+		       | JZ_ADC_REG_ADCMD_VREFNXN | JZ_ADC_REG_ADCMD_VREFPVDD33
+		       | JZ_ADC_REG_ADCMD_YNADC,
+		       adc->base + JZ_ADC_REG_ADCMD);
+
+		/* Third channel (INGENIC_ADC_TOUCH_XN): sample XN vs. GND */
+		writel(JZ_ADC_REG_ADCMD_YNGRU
+		       | JZ_ADC_REG_ADCMD_VREFNYN | JZ_ADC_REG_ADCMD_VREFPVDD33
+		       | JZ_ADC_REG_ADCMD_XNADC,
+		       adc->base + JZ_ADC_REG_ADCMD);
+	}
+
+	if (mask & 0x30) {
+		/* Sixth channel (INGENIC_ADC_TOUCH_YD): sample YP vs. YN */
+		writel(JZ_ADC_REG_ADCMD_VREFNYN | JZ_ADC_REG_ADCMD_VREFPVDD33
+		       | JZ_ADC_REG_ADCMD_YPADC,
+		       adc->base + JZ_ADC_REG_ADCMD);
+
+		/* Fifth channel (INGENIC_ADC_TOUCH_XD): sample XP vs. XN */
+		writel(JZ_ADC_REG_ADCMD_VREFNXN | JZ_ADC_REG_ADCMD_VREFPVDD33
+		       | JZ_ADC_REG_ADCMD_XPADC,
+		       adc->base + JZ_ADC_REG_ADCMD);
+	}
+
+	/* We're done */
+	writel(0, adc->base + JZ_ADC_REG_ADCMD);
+
+	mutex_unlock(&adc->lock);
+}
+
 static void ingenic_adc_set_config(struct ingenic_adc *adc,
 				   uint32_t mask,
 				   uint32_t val)
 {
 	uint32_t cfg;
 
-	clk_enable(adc->clk);
 	mutex_lock(&adc->lock);
 
 	cfg = readl(adc->base + JZ_ADC_REG_CFG) & ~mask;
@@ -81,7 +175,6 @@ static void ingenic_adc_set_config(struct ingenic_adc *adc,
 	writel(cfg, adc->base + JZ_ADC_REG_CFG);
 
 	mutex_unlock(&adc->lock);
-	clk_disable(adc->clk);
 }
 
 static void ingenic_adc_enable(struct ingenic_adc *adc,
@@ -124,6 +217,8 @@ static int ingenic_adc_write_raw(struct iio_dev *iio_dev,
 				 long m)
 {
 	struct ingenic_adc *adc = iio_priv(iio_dev);
+	struct device *dev = iio_dev->dev.parent;
+	int ret;
 
 	switch (m) {
 	case IIO_CHAN_INFO_SCALE:
@@ -131,6 +226,14 @@ static int ingenic_adc_write_raw(struct iio_dev *iio_dev,
 		case INGENIC_ADC_BATTERY:
 			if (!adc->soc_data->battery_vref_mode)
 				return -EINVAL;
+
+			ret = clk_enable(adc->clk);
+			if (ret) {
+				dev_err(dev, "Failed to enable clock: %d\n",
+					ret);
+				return ret;
+			}
+
 			if (val > JZ_ADC_BATTERY_LOW_VREF) {
 				ingenic_adc_set_config(adc,
 						       JZ_ADC_REG_CFG_BAT_MD,
@@ -142,6 +245,9 @@ static int ingenic_adc_write_raw(struct iio_dev *iio_dev,
 						       JZ_ADC_REG_CFG_BAT_MD);
 				adc->low_vref_mode = true;
 			}
+
+			clk_disable(adc->clk);
+
 			return 0;
 		default:
 			return -EINVAL;
@@ -251,6 +357,127 @@ static int jz4770_adc_init_clk_div(struct device *dev, struct ingenic_adc *adc)
 	return 0;
 }
 
+static const struct iio_chan_spec jz4740_channels[] = {
+	{
+		.extend_name = "aux",
+		.type = IIO_VOLTAGE,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE),
+		.indexed = 1,
+		.channel = INGENIC_ADC_AUX,
+		.scan_index = -1,
+	},
+	{
+		.extend_name = "battery",
+		.type = IIO_VOLTAGE,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE),
+		.info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW) |
+						BIT(IIO_CHAN_INFO_SCALE),
+		.indexed = 1,
+		.channel = INGENIC_ADC_BATTERY,
+		.scan_index = -1,
+	},
+};
+
+static const struct iio_chan_spec jz4770_channels[] = {
+	{
+		.type = IIO_VOLTAGE,
+		.indexed = 1,
+		.channel = INGENIC_ADC_TOUCH_XP,
+		.scan_index = 0,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 12,
+			.storagebits = 16,
+		},
+	},
+	{
+		.type = IIO_VOLTAGE,
+		.indexed = 1,
+		.channel = INGENIC_ADC_TOUCH_YP,
+		.scan_index = 1,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 12,
+			.storagebits = 16,
+		},
+	},
+	{
+		.type = IIO_VOLTAGE,
+		.indexed = 1,
+		.channel = INGENIC_ADC_TOUCH_XN,
+		.scan_index = 2,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 12,
+			.storagebits = 16,
+		},
+	},
+	{
+		.type = IIO_VOLTAGE,
+		.indexed = 1,
+		.channel = INGENIC_ADC_TOUCH_YN,
+		.scan_index = 3,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 12,
+			.storagebits = 16,
+		},
+	},
+	{
+		.type = IIO_VOLTAGE,
+		.indexed = 1,
+		.channel = INGENIC_ADC_TOUCH_XD,
+		.scan_index = 4,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 12,
+			.storagebits = 16,
+		},
+	},
+	{
+		.type = IIO_VOLTAGE,
+		.indexed = 1,
+		.channel = INGENIC_ADC_TOUCH_YD,
+		.scan_index = 5,
+		.scan_type = {
+			.sign = 'u',
+			.realbits = 12,
+			.storagebits = 16,
+		},
+	},
+	{
+		.extend_name = "aux",
+		.type = IIO_VOLTAGE,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE),
+		.indexed = 1,
+		.channel = INGENIC_ADC_AUX,
+		.scan_index = -1,
+	},
+	{
+		.extend_name = "battery",
+		.type = IIO_VOLTAGE,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE),
+		.info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW) |
+						BIT(IIO_CHAN_INFO_SCALE),
+		.indexed = 1,
+		.channel = INGENIC_ADC_BATTERY,
+		.scan_index = -1,
+	},
+	{
+		.extend_name = "aux2",
+		.type = IIO_VOLTAGE,
+		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+				      BIT(IIO_CHAN_INFO_SCALE),
+		.indexed = 1,
+		.channel = INGENIC_ADC_AUX2,
+		.scan_index = -1,
+	},
+};
+
 static const struct ingenic_adc_soc_data jz4725b_adc_soc_data = {
 	.battery_high_vref = JZ4725B_ADC_BATTERY_HIGH_VREF,
 	.battery_high_vref_bits = JZ4725B_ADC_BATTERY_HIGH_VREF_BITS,
@@ -260,6 +487,8 @@ static const struct ingenic_adc_soc_data jz4725b_adc_soc_data = {
 	.battery_scale_avail_size = ARRAY_SIZE(jz4725b_adc_battery_scale_avail),
 	.battery_vref_mode = true,
 	.has_aux2 = false,
+	.channels = jz4740_channels,
+	.num_channels = ARRAY_SIZE(jz4740_channels),
 	.init_clk_div = jz4725b_adc_init_clk_div,
 };
 
@@ -272,6 +501,8 @@ static const struct ingenic_adc_soc_data jz4740_adc_soc_data = {
 	.battery_scale_avail_size = ARRAY_SIZE(jz4740_adc_battery_scale_avail),
 	.battery_vref_mode = true,
 	.has_aux2 = false,
+	.channels = jz4740_channels,
+	.num_channels = ARRAY_SIZE(jz4740_channels),
 	.init_clk_div = NULL, /* no ADCLK register on JZ4740 */
 };
 
@@ -284,6 +515,8 @@ static const struct ingenic_adc_soc_data jz4770_adc_soc_data = {
 	.battery_scale_avail_size = ARRAY_SIZE(jz4770_adc_battery_scale_avail),
 	.battery_vref_mode = false,
 	.has_aux2 = true,
+	.channels = jz4770_channels,
+	.num_channels = ARRAY_SIZE(jz4770_channels),
 	.init_clk_div = jz4770_adc_init_clk_div,
 };
 
@@ -312,11 +545,19 @@ static int ingenic_adc_read_avail(struct iio_dev *iio_dev,
 	};
 }
 
-static int ingenic_adc_read_chan_info_raw(struct ingenic_adc *adc,
+static int ingenic_adc_read_chan_info_raw(struct iio_dev *iio_dev,
 					  struct iio_chan_spec const *chan,
 					  int *val)
 {
 	int bit, ret, engine = (chan->channel == INGENIC_ADC_BATTERY);
+	struct ingenic_adc *adc = iio_priv(iio_dev);
+
+	ret = clk_enable(adc->clk);
+	if (ret) {
+		dev_err(iio_dev->dev.parent, "Failed to enable clock: %d\n",
+			ret);
+		return ret;
+	}
 
 	/* We cannot sample AUX/AUX2 in parallel. */
 	mutex_lock(&adc->aux_lock);
@@ -325,7 +566,6 @@ static int ingenic_adc_read_chan_info_raw(struct ingenic_adc *adc,
 		ingenic_adc_set_config(adc, JZ_ADC_REG_CFG_AUX_MD, bit);
 	}
 
-	clk_enable(adc->clk);
 	ret = ingenic_adc_capture(adc, engine);
 	if (ret)
 		goto out;
@@ -342,8 +582,8 @@ static int ingenic_adc_read_chan_info_raw(struct ingenic_adc *adc,
 
 	ret = IIO_VAL_INT;
 out:
-	clk_disable(adc->clk);
 	mutex_unlock(&adc->aux_lock);
+	clk_disable(adc->clk);
 
 	return ret;
 }
@@ -358,7 +598,7 @@ static int ingenic_adc_read_raw(struct iio_dev *iio_dev,
 
 	switch (m) {
 	case IIO_CHAN_INFO_RAW:
-		return ingenic_adc_read_chan_info_raw(adc, chan, val);
+		return ingenic_adc_read_chan_info_raw(iio_dev, chan, val);
 	case IIO_CHAN_INFO_SCALE:
 		switch (chan->channel) {
 		case INGENIC_ADC_AUX:
@@ -383,6 +623,21 @@ static int ingenic_adc_read_raw(struct iio_dev *iio_dev,
 	}
 }
 
+static int ingenic_adc_of_xlate(struct iio_dev *iio_dev,
+				const struct of_phandle_args *iiospec)
+{
+	int i;
+
+	if (!iiospec->args_count)
+		return -EINVAL;
+
+	for (i = 0; i < iio_dev->num_channels; ++i)
+		if (iio_dev->channels[i].channel == iiospec->args[0])
+			return i;
+
+	return -EINVAL;
+}
+
 static void ingenic_adc_clk_cleanup(void *data)
 {
 	clk_unprepare(data);
@@ -392,44 +647,92 @@ static const struct iio_info ingenic_adc_info = {
 	.write_raw = ingenic_adc_write_raw,
 	.read_raw = ingenic_adc_read_raw,
 	.read_avail = ingenic_adc_read_avail,
+	.of_xlate = ingenic_adc_of_xlate,
 };
 
-static const struct iio_chan_spec ingenic_channels[] = {
-	{
-		.extend_name = "aux",
-		.type = IIO_VOLTAGE,
-		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
-				      BIT(IIO_CHAN_INFO_SCALE),
-		.indexed = 1,
-		.channel = INGENIC_ADC_AUX,
-	},
-	{
-		.extend_name = "battery",
-		.type = IIO_VOLTAGE,
-		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
-				      BIT(IIO_CHAN_INFO_SCALE),
-		.info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW) |
-						BIT(IIO_CHAN_INFO_SCALE),
-		.indexed = 1,
-		.channel = INGENIC_ADC_BATTERY,
-	},
-	{ /* Must always be last in the array. */
-		.extend_name = "aux2",
-		.type = IIO_VOLTAGE,
-		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
-				      BIT(IIO_CHAN_INFO_SCALE),
-		.indexed = 1,
-		.channel = INGENIC_ADC_AUX2,
-	},
+static int ingenic_adc_buffer_enable(struct iio_dev *iio_dev)
+{
+	struct ingenic_adc *adc = iio_priv(iio_dev);
+	int ret;
+
+	ret = clk_enable(adc->clk);
+	if (ret) {
+		dev_err(iio_dev->dev.parent, "Failed to enable clock: %d\n",
+			ret);
+		return ret;
+	}
+
+	/* It takes significant time for the touchscreen hw to stabilize. */
+	msleep(50);
+	ingenic_adc_set_config(adc, JZ_ADC_REG_CFG_TOUCH_OPS_MASK,
+			       JZ_ADC_REG_CFG_SAMPLE_NUM(4) |
+			       JZ_ADC_REG_CFG_PULL_UP(4));
+
+	writew(80, adc->base + JZ_ADC_REG_ADWAIT);
+	writew(2, adc->base + JZ_ADC_REG_ADSAME);
+	writeb((u8)~JZ_ADC_IRQ_TOUCH, adc->base + JZ_ADC_REG_CTRL);
+	writel(0, adc->base + JZ_ADC_REG_ADTCH);
+
+	ingenic_adc_set_config(adc, JZ_ADC_REG_CFG_CMD_SEL,
+			       JZ_ADC_REG_CFG_CMD_SEL);
+	ingenic_adc_set_adcmd(iio_dev, iio_dev->active_scan_mask[0]);
+
+	ingenic_adc_enable(adc, 2, true);
+
+	return 0;
+}
+
+static int ingenic_adc_buffer_disable(struct iio_dev *iio_dev)
+{
+	struct ingenic_adc *adc = iio_priv(iio_dev);
+
+	ingenic_adc_enable(adc, 2, false);
+
+	ingenic_adc_set_config(adc, JZ_ADC_REG_CFG_CMD_SEL, 0);
+
+	writeb(0xff, adc->base + JZ_ADC_REG_CTRL);
+	writeb(0xff, adc->base + JZ_ADC_REG_STATUS);
+	ingenic_adc_set_config(adc, JZ_ADC_REG_CFG_TOUCH_OPS_MASK, 0);
+	writew(0, adc->base + JZ_ADC_REG_ADSAME);
+	writew(0, adc->base + JZ_ADC_REG_ADWAIT);
+	clk_disable(adc->clk);
+
+	return 0;
+}
+
+static const struct iio_buffer_setup_ops ingenic_buffer_setup_ops = {
+	.postenable = &ingenic_adc_buffer_enable,
+	.predisable = &ingenic_adc_buffer_disable
 };
 
+static irqreturn_t ingenic_adc_irq(int irq, void *data)
+{
+	struct iio_dev *iio_dev = data;
+	struct ingenic_adc *adc = iio_priv(iio_dev);
+	unsigned long mask = iio_dev->active_scan_mask[0];
+	unsigned int i;
+	u32 tdat[3];
+
+	for (i = 0; i < ARRAY_SIZE(tdat); mask >>= 2, i++) {
+		if (mask & 0x3)
+			tdat[i] = readl(adc->base + JZ_ADC_REG_ADTCH);
+		else
+			tdat[i] = 0;
+	}
+
+	iio_push_to_buffers(iio_dev, tdat);
+	writeb(JZ_ADC_IRQ_TOUCH, adc->base + JZ_ADC_REG_STATUS);
+
+	return IRQ_HANDLED;
+}
+
 static int ingenic_adc_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct iio_dev *iio_dev;
 	struct ingenic_adc *adc;
 	const struct ingenic_adc_soc_data *soc_data;
-	int ret;
+	int irq, ret;
 
 	soc_data = device_get_match_data(dev);
 	if (!soc_data)
@@ -444,6 +747,17 @@ static int ingenic_adc_probe(struct platform_device *pdev)
 	mutex_init(&adc->aux_lock);
 	adc->soc_data = soc_data;
 
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	ret = devm_request_irq(dev, irq, ingenic_adc_irq, 0,
+			       dev_name(dev), iio_dev);
+	if (ret < 0) {
+		dev_err(dev, "Failed to request irq: %d\n", ret);
+		return ret;
+	}
+
 	adc->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(adc->base))
 		return PTR_ERR(adc->base);
@@ -481,14 +795,11 @@ static int ingenic_adc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	iio_dev->dev.parent = dev;
 	iio_dev->name = "jz-adc";
-	iio_dev->modes = INDIO_DIRECT_MODE;
-	iio_dev->channels = ingenic_channels;
-	iio_dev->num_channels = ARRAY_SIZE(ingenic_channels);
-	/* Remove AUX2 from the list of supported channels. */
-	if (!adc->soc_data->has_aux2)
-		iio_dev->num_channels -= 1;
+	iio_dev->modes = INDIO_DIRECT_MODE | INDIO_BUFFER_SOFTWARE;
+	iio_dev->setup_ops = &ingenic_buffer_setup_ops;
+	iio_dev->channels = soc_data->channels;
+	iio_dev->num_channels = soc_data->num_channels;
 	iio_dev->info = &ingenic_adc_info;
 
 	ret = devm_iio_device_register(dev, iio_dev);
@@ -498,7 +809,6 @@ static int ingenic_adc_probe(struct platform_device *pdev)
 	return ret;
 }
 
-#ifdef CONFIG_OF
 static const struct of_device_id ingenic_adc_of_match[] = {
 	{ .compatible = "ingenic,jz4725b-adc", .data = &jz4725b_adc_soc_data, },
 	{ .compatible = "ingenic,jz4740-adc", .data = &jz4740_adc_soc_data, },
@@ -506,12 +816,11 @@ static const struct of_device_id ingenic_adc_of_match[] = {
 	{ },
 };
 MODULE_DEVICE_TABLE(of, ingenic_adc_of_match);
-#endif
 
 static struct platform_driver ingenic_adc_driver = {
 	.driver = {
 		.name = "ingenic-adc",
-		.of_match_table = of_match_ptr(ingenic_adc_of_match),
+		.of_match_table = ingenic_adc_of_match,
 	},
 	.probe = ingenic_adc_probe,
 };
diff --git a/drivers/iio/adc/intel_mrfld_adc.c b/drivers/iio/adc/intel_mrfld_adc.c
index a6d2e1f27e76..75394350eb4c 100644
--- a/drivers/iio/adc/intel_mrfld_adc.c
+++ b/drivers/iio/adc/intel_mrfld_adc.c
@@ -207,7 +207,6 @@ static int mrfld_adc_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, indio_dev);
 
-	indio_dev->dev.parent = dev;
 	indio_dev->name = pdev->name;
 
 	indio_dev->channels = mrfld_adc_channels;
diff --git a/drivers/iio/adc/lp8788_adc.c b/drivers/iio/adc/lp8788_adc.c
index c1fc1b678e0f..8fb57e375529 100644
--- a/drivers/iio/adc/lp8788_adc.c
+++ b/drivers/iio/adc/lp8788_adc.c
@@ -198,14 +198,12 @@ static int lp8788_adc_probe(struct platform_device *pdev)
 	adc->lp = lp;
 	platform_set_drvdata(pdev, indio_dev);
 
-	indio_dev->dev.of_node = pdev->dev.of_node;
 	ret = lp8788_iio_map_register(indio_dev, lp->pdata, adc);
 	if (ret)
 		return ret;
 
 	mutex_init(&adc->lock);
 
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->name = pdev->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &lp8788_adc_info;
diff --git a/drivers/iio/adc/lpc18xx_adc.c b/drivers/iio/adc/lpc18xx_adc.c
index 4c6ac6644dc0..3566990ae87d 100644
--- a/drivers/iio/adc/lpc18xx_adc.c
+++ b/drivers/iio/adc/lpc18xx_adc.c
@@ -152,7 +152,6 @@ static int lpc18xx_adc_probe(struct platform_device *pdev)
 	}
 
 	indio_dev->name = dev_name(&pdev->dev);
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->info = &lpc18xx_adc_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = lpc18xx_adc_iio_channels;
diff --git a/drivers/iio/adc/lpc32xx_adc.c b/drivers/iio/adc/lpc32xx_adc.c
index b896f7ff4572..b56ce15255cf 100644
--- a/drivers/iio/adc/lpc32xx_adc.c
+++ b/drivers/iio/adc/lpc32xx_adc.c
@@ -14,6 +14,7 @@
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/module.h>
+#include <linux/mod_devicetable.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 
@@ -196,7 +197,6 @@ static int lpc32xx_adc_probe(struct platform_device *pdev)
 	init_completion(&st->completion);
 
 	iodev->name = LPC32XXAD_NAME;
-	iodev->dev.parent = &pdev->dev;
 	iodev->info = &lpc32xx_adc_iio_info;
 	iodev->modes = INDIO_DIRECT_MODE;
 	iodev->num_channels = ARRAY_SIZE(lpc32xx_adc_iio_channels);
@@ -210,19 +210,17 @@ static int lpc32xx_adc_probe(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_OF
 static const struct of_device_id lpc32xx_adc_match[] = {
 	{ .compatible = "nxp,lpc3220-adc" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, lpc32xx_adc_match);
-#endif
 
 static struct platform_driver lpc32xx_adc_driver = {
 	.probe		= lpc32xx_adc_probe,
 	.driver		= {
 		.name	= LPC32XXAD_NAME,
-		.of_match_table = of_match_ptr(lpc32xx_adc_match),
+		.of_match_table = lpc32xx_adc_match,
 	},
 };
 
diff --git a/drivers/iio/adc/ltc2471.c b/drivers/iio/adc/ltc2471.c
index 55fab612843a..0e0fe881a8e6 100644
--- a/drivers/iio/adc/ltc2471.c
+++ b/drivers/iio/adc/ltc2471.c
@@ -116,7 +116,6 @@ static int ltc2471_i2c_probe(struct i2c_client *client,
 	data = iio_priv(indio_dev);
 	data->client = client;
 
-	indio_dev->dev.parent = &client->dev;
 	indio_dev->name = id->name;
 	indio_dev->info = &ltc2471_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
diff --git a/drivers/iio/adc/ltc2485.c b/drivers/iio/adc/ltc2485.c
index c418466d51fd..37c762f8218c 100644
--- a/drivers/iio/adc/ltc2485.c
+++ b/drivers/iio/adc/ltc2485.c
@@ -108,7 +108,6 @@ static int ltc2485_probe(struct i2c_client *client,
 	i2c_set_clientdata(client, indio_dev);
 	data->client = client;
 
-	indio_dev->dev.parent = &client->dev;
 	indio_dev->name = id->name;
 	indio_dev->info = &ltc2485_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
diff --git a/drivers/iio/adc/ltc2496.c b/drivers/iio/adc/ltc2496.c
index 88a30156a849..dd956a7c216e 100644
--- a/drivers/iio/adc/ltc2496.c
+++ b/drivers/iio/adc/ltc2496.c
@@ -14,7 +14,7 @@
 #include <linux/iio/iio.h>
 #include <linux/iio/driver.h>
 #include <linux/module.h>
-#include <linux/of.h>
+#include <linux/mod_devicetable.h>
 
 #include "ltc2497.h"
 
@@ -96,7 +96,7 @@ MODULE_DEVICE_TABLE(of, ltc2496_of_match);
 static struct spi_driver ltc2496_driver = {
 	.driver = {
 		.name = "ltc2496",
-		.of_match_table = of_match_ptr(ltc2496_of_match),
+		.of_match_table = ltc2496_of_match,
 	},
 	.probe = ltc2496_probe,
 	.remove = ltc2496_remove,
diff --git a/drivers/iio/adc/ltc2497-core.c b/drivers/iio/adc/ltc2497-core.c
index f5f7039caacc..9b8fd9c32364 100644
--- a/drivers/iio/adc/ltc2497-core.c
+++ b/drivers/iio/adc/ltc2497-core.c
@@ -169,7 +169,6 @@ int ltc2497core_probe(struct device *dev, struct iio_dev *indio_dev)
 	struct ltc2497core_driverdata *ddata = iio_priv(indio_dev);
 	int ret;
 
-	indio_dev->dev.parent = dev;
 	indio_dev->name = dev_name(dev);
 	indio_dev->info = &ltc2497core_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
diff --git a/drivers/iio/adc/ltc2497.c b/drivers/iio/adc/ltc2497.c
index 5db63d7c6bc5..1adddf5a88a9 100644
--- a/drivers/iio/adc/ltc2497.c
+++ b/drivers/iio/adc/ltc2497.c
@@ -11,7 +11,7 @@
 #include <linux/iio/iio.h>
 #include <linux/iio/driver.h>
 #include <linux/module.h>
-#include <linux/of.h>
+#include <linux/mod_devicetable.h>
 
 #include "ltc2497.h"
 
@@ -98,7 +98,7 @@ MODULE_DEVICE_TABLE(of, ltc2497_of_match);
 static struct i2c_driver ltc2497_driver = {
 	.driver = {
 		.name = "ltc2497",
-		.of_match_table = of_match_ptr(ltc2497_of_match),
+		.of_match_table = ltc2497_of_match,
 	},
 	.probe = ltc2497_probe,
 	.remove = ltc2497_remove,
diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c
index 02834ca3e1ce..ca1dff3924ff 100644
--- a/drivers/iio/adc/max1027.c
+++ b/drivers/iio/adc/max1027.c
@@ -14,6 +14,7 @@
 
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/mod_devicetable.h>
 #include <linux/spi/spi.h>
 #include <linux/delay.h>
 
@@ -79,7 +80,6 @@ static const struct spi_device_id max1027_id[] = {
 };
 MODULE_DEVICE_TABLE(spi, max1027_id);
 
-#ifdef CONFIG_OF
 static const struct of_device_id max1027_adc_dt_ids[] = {
 	{ .compatible = "maxim,max1027" },
 	{ .compatible = "maxim,max1029" },
@@ -90,7 +90,6 @@ static const struct of_device_id max1027_adc_dt_ids[] = {
 	{},
 };
 MODULE_DEVICE_TABLE(of, max1027_adc_dt_ids);
-#endif
 
 #define MAX1027_V_CHAN(index, depth)					\
 	{								\
@@ -440,8 +439,6 @@ static int max1027_probe(struct spi_device *spi)
 	mutex_init(&st->lock);
 
 	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->info = &max1027_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = st->info->channels;
@@ -520,7 +517,7 @@ static int max1027_probe(struct spi_device *spi)
 static struct spi_driver max1027_driver = {
 	.driver = {
 		.name	= "max1027",
-		.of_match_table = of_match_ptr(max1027_adc_dt_ids),
+		.of_match_table = max1027_adc_dt_ids,
 	},
 	.probe		= max1027_probe,
 	.id_table	= max1027_id,
diff --git a/drivers/iio/adc/max11100.c b/drivers/iio/adc/max11100.c
index 3440539cfdba..6cf21758ca66 100644
--- a/drivers/iio/adc/max11100.c
+++ b/drivers/iio/adc/max11100.c
@@ -8,6 +8,7 @@
  */
 #include <linux/delay.h>
 #include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
 #include <linux/regulator/consumer.h>
 #include <linux/spi/spi.h>
@@ -37,7 +38,7 @@ struct max11100_state {
 	u8 buffer[3] ____cacheline_aligned;
 };
 
-static struct iio_chan_spec max11100_channels[] = {
+static const struct iio_chan_spec max11100_channels[] = {
 	{ /* [0] */
 		.type = IIO_VOLTAGE,
 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
@@ -115,8 +116,6 @@ static int max11100_probe(struct spi_device *spi)
 	state = iio_priv(indio_dev);
 	state->spi = spi;
 
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = "max11100";
 	indio_dev->info = &max11100_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
@@ -163,7 +162,7 @@ MODULE_DEVICE_TABLE(of, max11100_ids);
 static struct spi_driver max11100_driver = {
 	.driver = {
 		.name	= "max11100",
-		.of_match_table = of_match_ptr(max11100_ids),
+		.of_match_table = max11100_ids,
 	},
 	.probe		= max11100_probe,
 	.remove		= max11100_remove,
diff --git a/drivers/iio/adc/max1118.c b/drivers/iio/adc/max1118.c
index 0c5d7aaf6826..01b20e420ac4 100644
--- a/drivers/iio/adc/max1118.c
+++ b/drivers/iio/adc/max1118.c
@@ -18,6 +18,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/mod_devicetable.h>
 #include <linux/spi/spi.h>
 #include <linux/iio/iio.h>
 #include <linux/iio/buffer.h>
@@ -225,7 +226,6 @@ static int max1118_probe(struct spi_device *spi)
 	spi_set_drvdata(spi, indio_dev);
 
 	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->dev.parent = &spi->dev;
 	indio_dev->info = &max1118_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = max1118_channels;
@@ -281,8 +281,6 @@ static const struct spi_device_id max1118_id[] = {
 };
 MODULE_DEVICE_TABLE(spi, max1118_id);
 
-#ifdef CONFIG_OF
-
 static const struct of_device_id max1118_dt_ids[] = {
 	{ .compatible = "maxim,max1117" },
 	{ .compatible = "maxim,max1118" },
@@ -291,12 +289,10 @@ static const struct of_device_id max1118_dt_ids[] = {
 };
 MODULE_DEVICE_TABLE(of, max1118_dt_ids);
 
-#endif
-
 static struct spi_driver max1118_spi_driver = {
 	.driver = {
 		.name = "max1118",
-		.of_match_table = of_match_ptr(max1118_dt_ids),
+		.of_match_table = max1118_dt_ids,
 	},
 	.probe = max1118_probe,
 	.remove = max1118_remove,
diff --git a/drivers/iio/adc/max1241.c b/drivers/iio/adc/max1241.c
index 541939c7abca..0cbbb3c56d08 100644
--- a/drivers/iio/adc/max1241.c
+++ b/drivers/iio/adc/max1241.c
@@ -192,7 +192,6 @@ static int max1241_probe(struct spi_device *spi)
 		dev_dbg(dev, "no shutdown pin passed, low-power mode disabled");
 
 	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->dev.parent = dev;
 	indio_dev->info = &max1241_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = max1241_channels;
diff --git a/drivers/iio/adc/max1363.c b/drivers/iio/adc/max1363.c
index 9d92017c79b2..f2b576c69949 100644
--- a/drivers/iio/adc/max1363.c
+++ b/drivers/iio/adc/max1363.c
@@ -22,8 +22,8 @@
 #include <linux/slab.h>
 #include <linux/err.h>
 #include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/property.h>
 
 #include <linux/iio/iio.h>
 #include <linux/iio/sysfs.h>
@@ -150,7 +150,7 @@ struct max1363_chip_info {
  * @current_mode:	the scan mode of this chip
  * @requestedmask:	a valid requested set of channels
  * @reg:		supply regulator
- * @lock		lock to ensure state is consistent
+ * @lock:		lock to ensure state is consistent
  * @monitor_on:		whether monitor mode is enabled
  * @monitor_speed:	parameter corresponding to device monitor speed setting
  * @mask_high:		bitmask for enabled high thresholds
@@ -1529,8 +1529,6 @@ done:
 	return IRQ_HANDLED;
 }
 
-#ifdef CONFIG_OF
-
 #define MAX1363_COMPATIBLE(of_compatible, cfg) {		\
 			.compatible = of_compatible,		\
 			.data = &max1363_chip_info_tbl[cfg],	\
@@ -1578,7 +1576,6 @@ static const struct of_device_id max1363_of_match[] = {
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, max1363_of_match);
-#endif
 
 static int max1363_probe(struct i2c_client *client,
 			 const struct i2c_device_id *id)
@@ -1593,7 +1590,6 @@ static int max1363_probe(struct i2c_client *client,
 	if (!indio_dev)
 		return -ENOMEM;
 
-	indio_dev->dev.of_node = client->dev.of_node;
 	ret = iio_map_array_register(indio_dev, client->dev.platform_data);
 	if (ret < 0)
 		return ret;
@@ -1614,7 +1610,7 @@ static int max1363_probe(struct i2c_client *client,
 	/* this is only used for device removal purposes */
 	i2c_set_clientdata(client, indio_dev);
 
-	st->chip_info = of_device_get_match_data(&client->dev);
+	st->chip_info = device_get_match_data(&client->dev);
 	if (!st->chip_info)
 		st->chip_info = &max1363_chip_info_tbl[id->driver_data];
 	st->client = client;
@@ -1652,9 +1648,6 @@ static int max1363_probe(struct i2c_client *client,
 	if (ret)
 		goto error_disable_reg;
 
-	/* Establish that the iio_dev is a child of the i2c device */
-	indio_dev->dev.parent = &client->dev;
-	indio_dev->dev.of_node = client->dev.of_node;
 	indio_dev->name = id->name;
 	indio_dev->channels = st->chip_info->channels;
 	indio_dev->num_channels = st->chip_info->num_channels;
@@ -1760,7 +1753,7 @@ MODULE_DEVICE_TABLE(i2c, max1363_id);
 static struct i2c_driver max1363_driver = {
 	.driver = {
 		.name = "max1363",
-		.of_match_table = of_match_ptr(max1363_of_match),
+		.of_match_table = max1363_of_match,
 	},
 	.probe = max1363_probe,
 	.remove = max1363_remove,
diff --git a/drivers/iio/adc/max9611.c b/drivers/iio/adc/max9611.c
index 04d5ff7d2c8e..052ab23f10b2 100644
--- a/drivers/iio/adc/max9611.c
+++ b/drivers/iio/adc/max9611.c
@@ -110,7 +110,7 @@ enum max9611_conf_ids {
 	CONF_TEMP,
 };
 
-/**
+/*
  * max9611_mux_conf - associate ADC mux configuration with register address
  *		      where data shall be read from
  */
@@ -133,7 +133,7 @@ enum max9611_csa_gain_params {
 	CSA_GAIN_OFFS_RAW,
 };
 
-/**
+/*
  * max9611_csa_gain_conf - associate gain multiplier with LSB and
  *			   offset values.
  *
@@ -545,8 +545,6 @@ static int max9611_probe(struct i2c_client *client,
 	if (ret)
 		return ret;
 
-	indio_dev->dev.parent	= &client->dev;
-	indio_dev->dev.of_node	= client->dev.of_node;
 	indio_dev->name		= of_id->data;
 	indio_dev->modes	= INDIO_DIRECT_MODE;
 	indio_dev->info		= &indio_info;
diff --git a/drivers/iio/adc/mcp320x.c b/drivers/iio/adc/mcp320x.c
index 2c0eb5de110c..8d1cff28cae0 100644
--- a/drivers/iio/adc/mcp320x.c
+++ b/drivers/iio/adc/mcp320x.c
@@ -27,13 +27,13 @@
  * MCP3553
  *
  * Datasheet can be found here:
- * http://ww1.microchip.com/downloads/en/DeviceDoc/21293C.pdf  mcp3001
- * http://ww1.microchip.com/downloads/en/DeviceDoc/21294E.pdf  mcp3002
- * http://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf  mcp3004/08
+ * https://ww1.microchip.com/downloads/en/DeviceDoc/21293C.pdf  mcp3001
+ * https://ww1.microchip.com/downloads/en/DeviceDoc/21294E.pdf  mcp3002
+ * https://ww1.microchip.com/downloads/en/DeviceDoc/21295d.pdf  mcp3004/08
  * http://ww1.microchip.com/downloads/en/DeviceDoc/21290D.pdf  mcp3201
  * http://ww1.microchip.com/downloads/en/DeviceDoc/21034D.pdf  mcp3202
  * http://ww1.microchip.com/downloads/en/DeviceDoc/21298c.pdf  mcp3204/08
- * http://ww1.microchip.com/downloads/en/DeviceDoc/21700E.pdf  mcp3301
+ * https://ww1.microchip.com/downloads/en/DeviceDoc/21700E.pdf  mcp3301
  * http://ww1.microchip.com/downloads/en/DeviceDoc/21950D.pdf  mcp3550/1/3
  */
 
@@ -41,6 +41,7 @@
 #include <linux/delay.h>
 #include <linux/spi/spi.h>
 #include <linux/module.h>
+#include <linux/mod_devicetable.h>
 #include <linux/iio/iio.h>
 #include <linux/regulator/consumer.h>
 
@@ -384,8 +385,6 @@ static int mcp320x_probe(struct spi_device *spi)
 	adc = iio_priv(indio_dev);
 	adc->spi = spi;
 
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &mcp320x_info;
@@ -471,7 +470,6 @@ static int mcp320x_remove(struct spi_device *spi)
 	return 0;
 }
 
-#if defined(CONFIG_OF)
 static const struct of_device_id mcp320x_dt_ids[] = {
 	/* NOTE: The use of compatibles with no vendor prefix is deprecated. */
 	{ .compatible = "mcp3001" },
@@ -499,7 +497,6 @@ static const struct of_device_id mcp320x_dt_ids[] = {
 	{ }
 };
 MODULE_DEVICE_TABLE(of, mcp320x_dt_ids);
-#endif
 
 static const struct spi_device_id mcp320x_id[] = {
 	{ "mcp3001", mcp3001 },
@@ -522,7 +519,7 @@ MODULE_DEVICE_TABLE(spi, mcp320x_id);
 static struct spi_driver mcp320x_driver = {
 	.driver = {
 		.name = "mcp320x",
-		.of_match_table = of_match_ptr(mcp320x_dt_ids),
+		.of_match_table = mcp320x_dt_ids,
 	},
 	.probe = mcp320x_probe,
 	.remove = mcp320x_remove,
diff --git a/drivers/iio/adc/mcp3422.c b/drivers/iio/adc/mcp3422.c
index d86c0b5d80a3..5f1706d1c3c0 100644
--- a/drivers/iio/adc/mcp3422.c
+++ b/drivers/iio/adc/mcp3422.c
@@ -6,8 +6,8 @@
  * Author: Angelo Compagnucci <angelo.compagnucci@gmail.com>
  *
  * Datasheet: http://ww1.microchip.com/downloads/en/devicedoc/22088b.pdf
- *            http://ww1.microchip.com/downloads/en/DeviceDoc/22226a.pdf
- *            http://ww1.microchip.com/downloads/en/DeviceDoc/22072b.pdf
+ *            https://ww1.microchip.com/downloads/en/DeviceDoc/22226a.pdf
+ *            https://ww1.microchip.com/downloads/en/DeviceDoc/22072b.pdf
  *
  * This driver exports the value of analog input voltage to sysfs, the
  * voltage unit is nV.
@@ -16,9 +16,9 @@
 #include <linux/err.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
+#include <linux/mod_devicetable.h>
 #include <linux/delay.h>
 #include <linux/sysfs.h>
-#include <linux/of.h>
 #include <asm/unaligned.h>
 
 #include <linux/iio/iio.h>
@@ -347,8 +347,6 @@ static int mcp3422_probe(struct i2c_client *client,
 
 	mutex_init(&adc->lock);
 
-	indio_dev->dev.parent = &client->dev;
-	indio_dev->dev.of_node = client->dev.of_node;
 	indio_dev->name = dev_name(&client->dev);
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &mcp3422_info;
@@ -404,18 +402,16 @@ static const struct i2c_device_id mcp3422_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, mcp3422_id);
 
-#ifdef CONFIG_OF
 static const struct of_device_id mcp3422_of_match[] = {
 	{ .compatible = "mcp3422" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, mcp3422_of_match);
-#endif
 
 static struct i2c_driver mcp3422_driver = {
 	.driver = {
 		.name = "mcp3422",
-		.of_match_table = of_match_ptr(mcp3422_of_match),
+		.of_match_table = mcp3422_of_match,
 	},
 	.probe = mcp3422_probe,
 	.id_table = mcp3422_id,
diff --git a/drivers/iio/adc/mcp3911.c b/drivers/iio/adc/mcp3911.c
index dd52f08ec82e..e573da5397bb 100644
--- a/drivers/iio/adc/mcp3911.c
+++ b/drivers/iio/adc/mcp3911.c
@@ -293,8 +293,6 @@ static int mcp3911_probe(struct spi_device *spi)
 	if (ret)
 		goto clk_disable;
 
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &mcp3911_info;
diff --git a/drivers/iio/adc/men_z188_adc.c b/drivers/iio/adc/men_z188_adc.c
index 196c8226381e..42ea8bc7e780 100644
--- a/drivers/iio/adc/men_z188_adc.c
+++ b/drivers/iio/adc/men_z188_adc.c
@@ -110,7 +110,6 @@ static int men_z188_probe(struct mcb_device *dev,
 
 	adc = iio_priv(indio_dev);
 	indio_dev->name = "z188-adc";
-	indio_dev->dev.parent = &dev->dev;
 	indio_dev->info = &z188_adc_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = z188_adc_iio_channels;
diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
index 22a470db9ef8..93c2252c0b89 100644
--- a/drivers/iio/adc/meson_saradc.c
+++ b/drivers/iio/adc/meson_saradc.c
@@ -1208,8 +1208,6 @@ static int meson_sar_adc_probe(struct platform_device *pdev)
 	priv->param = match_data->param;
 
 	indio_dev->name = match_data->name;
-	indio_dev->dev.parent = &pdev->dev;
-	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &meson_sar_adc_iio_info;
 
diff --git a/drivers/iio/adc/mt6577_auxadc.c b/drivers/iio/adc/mt6577_auxadc.c
index a4776d924f3a..ac415cb089cd 100644
--- a/drivers/iio/adc/mt6577_auxadc.c
+++ b/drivers/iio/adc/mt6577_auxadc.c
@@ -245,7 +245,6 @@ static int mt6577_auxadc_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	adc_dev = iio_priv(indio_dev);
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->name = dev_name(&pdev->dev);
 	indio_dev->info = &mt6577_auxadc_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
diff --git a/drivers/iio/adc/mxs-lradc-adc.c b/drivers/iio/adc/mxs-lradc-adc.c
index 9d2f74c2489a..30e29f44ebd2 100644
--- a/drivers/iio/adc/mxs-lradc-adc.c
+++ b/drivers/iio/adc/mxs-lradc-adc.c
@@ -568,8 +568,6 @@ static bool mxs_lradc_adc_validate_scan_mask(struct iio_dev *iio,
 
 static const struct iio_buffer_setup_ops mxs_lradc_adc_buffer_ops = {
 	.preenable = &mxs_lradc_adc_buffer_preenable,
-	.postenable = &iio_triggered_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
 	.postdisable = &mxs_lradc_adc_buffer_postdisable,
 	.validate_scan_mask = &mxs_lradc_adc_validate_scan_mask,
 };
@@ -722,7 +720,6 @@ static int mxs_lradc_adc_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, iio);
 
 	iio->name = pdev->name;
-	iio->dev.parent = dev;
 	iio->dev.of_node = dev->parent->of_node;
 	iio->info = &mxs_lradc_adc_iio_info;
 	iio->modes = INDIO_DIRECT_MODE;
diff --git a/drivers/iio/adc/nau7802.c b/drivers/iio/adc/nau7802.c
index 572579139fba..07c85434b568 100644
--- a/drivers/iio/adc/nau7802.c
+++ b/drivers/iio/adc/nau7802.c
@@ -430,8 +430,6 @@ static int nau7802_probe(struct i2c_client *client,
 
 	i2c_set_clientdata(client, indio_dev);
 
-	indio_dev->dev.parent = &client->dev;
-	indio_dev->dev.of_node = client->dev.of_node;
 	indio_dev->name = dev_name(&client->dev);
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &nau7802_info;
diff --git a/drivers/iio/adc/npcm_adc.c b/drivers/iio/adc/npcm_adc.c
index 83bad2d5575d..d9d105920001 100644
--- a/drivers/iio/adc/npcm_adc.c
+++ b/drivers/iio/adc/npcm_adc.c
@@ -261,7 +261,6 @@ static int npcm_adc_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, indio_dev);
 	indio_dev->name = dev_name(&pdev->dev);
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->info = &npcm_adc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = npcm_adc_iio_channels;
diff --git a/drivers/iio/adc/palmas_gpadc.c b/drivers/iio/adc/palmas_gpadc.c
index 46e595eb889f..1ca6570be66a 100644
--- a/drivers/iio/adc/palmas_gpadc.c
+++ b/drivers/iio/adc/palmas_gpadc.c
@@ -76,7 +76,7 @@ static struct palmas_gpadc_info palmas_gpadc_info[] = {
 	PALMAS_ADC_INFO(IN15, 0, 0, 0, 0, INVALID, INVALID, true),
 };
 
-/**
+/*
  * struct palmas_gpadc - the palmas_gpadc structure
  * @ch0_current:	channel 0 current source setting
  *			0: 0 uA
@@ -94,7 +94,6 @@ static struct palmas_gpadc_info palmas_gpadc_info[] = {
  * This is the palmas_gpadc structure to store run-time information
  * and pointers for this driver instance.
  */
-
 struct palmas_gpadc {
 	struct device			*dev;
 	struct palmas			*palmas;
@@ -593,7 +592,6 @@ static int palmas_gpadc_probe(struct platform_device *pdev)
 	adc->extended_delay = gpadc_pdata->extended_delay;
 
 	indio_dev->name = MOD_NAME;
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->info = &palmas_gpadc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = palmas_gpadc_iio_channel;
diff --git a/drivers/iio/adc/qcom-pm8xxx-xoadc.c b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
index c599ffa45a04..7e108da7d255 100644
--- a/drivers/iio/adc/qcom-pm8xxx-xoadc.c
+++ b/drivers/iio/adc/qcom-pm8xxx-xoadc.c
@@ -120,7 +120,7 @@
 #define ADC_ARB_USRP_DATA0			0x19D
 #define ADC_ARB_USRP_DATA1			0x19C
 
-/**
+/*
  * Physical channels which MUST exist on all PM variants in order to provide
  * proper reference points for calibration.
  *
@@ -388,6 +388,7 @@ struct pm8xxx_chan_info {
  * struct pm8xxx_xoadc - state container for the XOADC
  * @dev: pointer to device
  * @map: regmap to access registers
+ * @variant: XOADC variant characteristics
  * @vref: reference voltage regulator
  * characteristics of the channels, and sensible default settings
  * @nchans: number of channels, configured by the device tree
@@ -933,8 +934,6 @@ static int pm8xxx_xoadc_probe(struct platform_device *pdev)
 		goto out_disable_vref;
 	}
 
-	indio_dev->dev.parent = dev;
-	indio_dev->dev.of_node = np;
 	indio_dev->name = variant->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &pm8xxx_xoadc_info;
diff --git a/drivers/iio/adc/qcom-spmi-adc5.c b/drivers/iio/adc/qcom-spmi-adc5.c
index 21fdcde77883..b4b73c9920b4 100644
--- a/drivers/iio/adc/qcom-spmi-adc5.c
+++ b/drivers/iio/adc/qcom-spmi-adc5.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
- * Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2018, 2020, The Linux Foundation. All rights reserved.
  */
 
 #include <linux/bitops.h>
@@ -23,6 +23,7 @@
 
 #define ADC5_USR_REVISION1			0x0
 #define ADC5_USR_STATUS1			0x8
+#define ADC5_USR_STATUS1_CONV_FAULT		BIT(7)
 #define ADC5_USR_STATUS1_REQ_STS		BIT(1)
 #define ADC5_USR_STATUS1_EOC			BIT(0)
 #define ADC5_USR_STATUS1_REQ_STS_EOC_MASK	0x3
@@ -65,6 +66,9 @@
 
 #define ADC5_USR_IBAT_DATA1			0x53
 
+#define ADC_CHANNEL_OFFSET			0x8
+#define ADC_CHANNEL_MASK			GENMASK(7, 0)
+
 /*
  * Conversion time varies based on the decimation, clock rate, fast average
  * samples and measurements queued across different VADC peripherals.
@@ -79,6 +83,11 @@
 #define ADC5_HW_SETTLE_DIFF_MINOR		3
 #define ADC5_HW_SETTLE_DIFF_MAJOR		5
 
+/* For PMIC7 */
+#define ADC_APP_SID				0x40
+#define ADC_APP_SID_MASK			GENMASK(3, 0)
+#define ADC7_CONV_TIMEOUT			msecs_to_jiffies(10)
+
 enum adc5_cal_method {
 	ADC5_NO_CAL = 0,
 	ADC5_RATIOMETRIC_CAL,
@@ -96,6 +105,7 @@ enum adc5_cal_val {
  * @cal_method: calibration method.
  * @cal_val: calibration value
  * @decimation: sampling rate supported for the channel.
+ * @sid: slave id of PMIC owning the channel, for PMIC7.
  * @prescale: channel scaling performed on the input signal.
  * @hw_settle_time: the time between AMUX being configured and the
  *	start of conversion.
@@ -110,6 +120,7 @@ struct adc5_channel_prop {
 	enum adc5_cal_method	cal_method;
 	enum adc5_cal_val	cal_val;
 	unsigned int		decimation;
+	unsigned int		sid;
 	unsigned int		prescale;
 	unsigned int		hw_settle_time;
 	unsigned int		avg_samples;
@@ -165,6 +176,11 @@ static int adc5_write(struct adc5_chip *adc, u16 offset, u8 *data, int len)
 	return regmap_bulk_write(adc->regmap, adc->base + offset, data, len);
 }
 
+static int adc5_masked_write(struct adc5_chip *adc, u16 offset, u8 mask, u8 val)
+{
+	return regmap_update_bits(adc->regmap, adc->base + offset, mask, val);
+}
+
 static int adc5_prescaling_from_dt(u32 num, u32 den)
 {
 	unsigned int pre;
@@ -230,11 +246,11 @@ static int adc5_read_voltage_data(struct adc5_chip *adc, u16 *data)
 	*data = (rslt_msb << 8) | rslt_lsb;
 
 	if (*data == ADC5_USR_DATA_CHECK) {
-		pr_err("Invalid data:0x%x\n", *data);
+		dev_err(adc->dev, "Invalid data:0x%x\n", *data);
 		return -EINVAL;
 	}
 
-	pr_debug("voltage raw code:0x%x\n", *data);
+	dev_dbg(adc->dev, "voltage raw code:0x%x\n", *data);
 
 	return 0;
 }
@@ -285,7 +301,7 @@ static int adc5_configure(struct adc5_chip *adc,
 
 	/* Read registers 0x42 through 0x46 */
 	ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
-	if (ret < 0)
+	if (ret)
 		return ret;
 
 	/* Digital param selection */
@@ -314,6 +330,47 @@ static int adc5_configure(struct adc5_chip *adc,
 	return adc5_write(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
 }
 
+static int adc7_configure(struct adc5_chip *adc,
+			struct adc5_channel_prop *prop)
+{
+	int ret;
+	u8 conv_req = 0, buf[4];
+
+	ret = adc5_masked_write(adc, ADC_APP_SID, ADC_APP_SID_MASK, prop->sid);
+	if (ret)
+		return ret;
+
+	ret = adc5_read(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
+	if (ret)
+		return ret;
+
+	/* Digital param selection */
+	adc5_update_dig_param(adc, prop, &buf[0]);
+
+	/* Update fast average sample value */
+	buf[1] &= ~ADC5_USR_FAST_AVG_CTL_SAMPLES_MASK;
+	buf[1] |= prop->avg_samples;
+
+	/* Select ADC channel */
+	buf[2] = prop->channel;
+
+	/* Select HW settle delay for channel */
+	buf[3] &= ~ADC5_USR_HW_SETTLE_DELAY_MASK;
+	buf[3] |= prop->hw_settle_time;
+
+	/* Select CONV request */
+	conv_req = ADC5_USR_CONV_REQ_REQ;
+
+	if (!adc->poll_eoc)
+		reinit_completion(&adc->complete);
+
+	ret = adc5_write(adc, ADC5_USR_DIG_PARAM, buf, sizeof(buf));
+	if (ret)
+		return ret;
+
+	return adc5_write(adc, ADC5_USR_CONV_REQ, &conv_req, 1);
+}
+
 static int adc5_do_conversion(struct adc5_chip *adc,
 			struct adc5_channel_prop *prop,
 			struct iio_chan_spec const *chan,
@@ -325,24 +382,24 @@ static int adc5_do_conversion(struct adc5_chip *adc,
 
 	ret = adc5_configure(adc, prop);
 	if (ret) {
-		pr_err("ADC configure failed with %d\n", ret);
+		dev_err(adc->dev, "ADC configure failed with %d\n", ret);
 		goto unlock;
 	}
 
 	if (adc->poll_eoc) {
 		ret = adc5_poll_wait_eoc(adc);
-		if (ret < 0) {
-			pr_err("EOC bit not set\n");
+		if (ret) {
+			dev_err(adc->dev, "EOC bit not set\n");
 			goto unlock;
 		}
 	} else {
 		ret = wait_for_completion_timeout(&adc->complete,
 							ADC5_CONV_TIMEOUT);
 		if (!ret) {
-			pr_debug("Did not get completion timeout.\n");
+			dev_dbg(adc->dev, "Did not get completion timeout.\n");
 			ret = adc5_poll_wait_eoc(adc);
-			if (ret < 0) {
-				pr_err("EOC bit not set\n");
+			if (ret) {
+				dev_err(adc->dev, "EOC bit not set\n");
 				goto unlock;
 			}
 		}
@@ -355,6 +412,48 @@ unlock:
 	return ret;
 }
 
+static int adc7_do_conversion(struct adc5_chip *adc,
+			struct adc5_channel_prop *prop,
+			struct iio_chan_spec const *chan,
+			u16 *data_volt, u16 *data_cur)
+{
+	int ret;
+	u8 status;
+
+	mutex_lock(&adc->lock);
+
+	ret = adc7_configure(adc, prop);
+	if (ret) {
+		dev_err(adc->dev, "ADC configure failed with %d\n", ret);
+		goto unlock;
+	}
+
+	/* No support for polling mode at present */
+	wait_for_completion_timeout(&adc->complete, ADC7_CONV_TIMEOUT);
+
+	ret = adc5_read(adc, ADC5_USR_STATUS1, &status, 1);
+	if (ret)
+		goto unlock;
+
+	if (status & ADC5_USR_STATUS1_CONV_FAULT) {
+		dev_err(adc->dev, "Unexpected conversion fault\n");
+		ret = -EIO;
+		goto unlock;
+	}
+
+	ret = adc5_read_voltage_data(adc, data_volt);
+
+unlock:
+	mutex_unlock(&adc->lock);
+
+	return ret;
+}
+
+typedef int (*adc_do_conversion)(struct adc5_chip *adc,
+			struct adc5_channel_prop *prop,
+			struct iio_chan_spec const *chan,
+			u16 *data_volt, u16 *data_cur);
+
 static irqreturn_t adc5_isr(int irq, void *dev_id)
 {
 	struct adc5_chip *adc = dev_id;
@@ -377,9 +476,25 @@ static int adc5_of_xlate(struct iio_dev *indio_dev,
 	return -EINVAL;
 }
 
-static int adc5_read_raw(struct iio_dev *indio_dev,
+static int adc7_of_xlate(struct iio_dev *indio_dev,
+				const struct of_phandle_args *iiospec)
+{
+	struct adc5_chip *adc = iio_priv(indio_dev);
+	int i, v_channel;
+
+	for (i = 0; i < adc->nchannels; i++) {
+		v_channel = (adc->chan_props[i].sid << ADC_CHANNEL_OFFSET) |
+			adc->chan_props[i].channel;
+		if (v_channel == iiospec->args[0])
+			return i;
+	}
+
+	return -EINVAL;
+}
+
+static int adc_read_raw_common(struct iio_dev *indio_dev,
 			 struct iio_chan_spec const *chan, int *val, int *val2,
-			 long mask)
+			 long mask, adc_do_conversion do_conv)
 {
 	struct adc5_chip *adc = iio_priv(indio_dev);
 	struct adc5_channel_prop *prop;
@@ -390,8 +505,8 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_PROCESSED:
-		ret = adc5_do_conversion(adc, prop, chan,
-				&adc_code_volt, &adc_code_cur);
+		ret = do_conv(adc, prop, chan,
+					&adc_code_volt, &adc_code_cur);
 		if (ret)
 			return ret;
 
@@ -406,8 +521,22 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
 	default:
 		return -EINVAL;
 	}
+}
 
-	return 0;
+static int adc5_read_raw(struct iio_dev *indio_dev,
+			 struct iio_chan_spec const *chan, int *val, int *val2,
+			 long mask)
+{
+	return adc_read_raw_common(indio_dev, chan, val, val2,
+				mask, adc5_do_conversion);
+}
+
+static int adc7_read_raw(struct iio_dev *indio_dev,
+			 struct iio_chan_spec const *chan, int *val, int *val2,
+			 long mask)
+{
+	return adc_read_raw_common(indio_dev, chan, val, val2,
+				mask, adc7_do_conversion);
 }
 
 static const struct iio_info adc5_info = {
@@ -415,6 +544,11 @@ static const struct iio_info adc5_info = {
 	.of_xlate = adc5_of_xlate,
 };
 
+static const struct iio_info adc7_info = {
+	.read_raw = adc7_read_raw,
+	.of_xlate = adc7_of_xlate,
+};
+
 struct adc5_channels {
 	const char *datasheet_name;
 	unsigned int prescale_index;
@@ -477,6 +611,39 @@ static const struct adc5_channels adc5_chans_pmic[ADC5_MAX_CHANNEL] = {
 					SCALE_HW_CALIB_PM5_SMB_TEMP)
 };
 
+static const struct adc5_channels adc7_chans_pmic[ADC5_MAX_CHANNEL] = {
+	[ADC7_REF_GND]		= ADC5_CHAN_VOLT("ref_gnd", 0,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC7_1P25VREF]		= ADC5_CHAN_VOLT("vref_1p25", 0,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC7_VPH_PWR]		= ADC5_CHAN_VOLT("vph_pwr", 1,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC7_VBAT_SNS]		= ADC5_CHAN_VOLT("vbat_sns", 3,
+					SCALE_HW_CALIB_DEFAULT)
+	[ADC7_DIE_TEMP]		= ADC5_CHAN_TEMP("die_temp", 0,
+					SCALE_HW_CALIB_PMIC_THERM_PM7)
+	[ADC7_AMUX_THM1_100K_PU] = ADC5_CHAN_TEMP("amux_thm1_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_AMUX_THM2_100K_PU] = ADC5_CHAN_TEMP("amux_thm2_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_AMUX_THM3_100K_PU] = ADC5_CHAN_TEMP("amux_thm3_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_AMUX_THM4_100K_PU] = ADC5_CHAN_TEMP("amux_thm4_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_AMUX_THM5_100K_PU] = ADC5_CHAN_TEMP("amux_thm5_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_AMUX_THM6_100K_PU] = ADC5_CHAN_TEMP("amux_thm6_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_GPIO1_100K_PU]	= ADC5_CHAN_TEMP("gpio1_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_GPIO2_100K_PU]	= ADC5_CHAN_TEMP("gpio2_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_GPIO3_100K_PU]	= ADC5_CHAN_TEMP("gpio3_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+	[ADC7_GPIO4_100K_PU]	= ADC5_CHAN_TEMP("gpio4_pu2", 0,
+					SCALE_HW_CALIB_THERM_100K_PU_PM7)
+};
+
 static const struct adc5_channels adc5_chans_rev2[ADC5_MAX_CHANNEL] = {
 	[ADC5_REF_GND]		= ADC5_CHAN_VOLT("ref_gnd", 0,
 					SCALE_HW_CALIB_DEFAULT)
@@ -511,6 +678,7 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 {
 	const char *name = node->name, *channel_name;
 	u32 chan, value, varr[2];
+	u32 sid = 0;
 	int ret;
 	struct device *dev = adc->dev;
 
@@ -520,6 +688,15 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 		return ret;
 	}
 
+	/* Value read from "reg" is virtual channel number */
+
+	/* virtual channel number = sid << 8 | channel number */
+
+	if (adc->data->info == &adc7_info) {
+		sid = chan >> ADC_CHANNEL_OFFSET;
+		chan = chan & ADC_CHANNEL_MASK;
+	}
+
 	if (chan > ADC5_PARALLEL_ISENSE_VBAT_IDATA ||
 	    !data->adc_chans[chan].datasheet_name) {
 		dev_err(dev, "%s invalid channel number %d\n", name, chan);
@@ -528,11 +705,12 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 
 	/* the channel has DT description */
 	prop->channel = chan;
+	prop->sid = sid;
 
 	channel_name = of_get_property(node,
 				"label", NULL) ? : node->name;
 	if (!channel_name) {
-		pr_err("Invalid channel name\n");
+		dev_err(dev, "Invalid channel name\n");
 		return -EINVAL;
 	}
 	prop->datasheet_name = channel_name;
@@ -570,16 +748,17 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 
 		ret = adc5_read(adc, ADC5_USR_REVISION1, dig_version,
 							sizeof(dig_version));
-		if (ret < 0) {
+		if (ret) {
 			dev_err(dev, "Invalid dig version read %d\n", ret);
 			return ret;
 		}
 
-		pr_debug("dig_ver:minor:%d, major:%d\n", dig_version[0],
+		dev_dbg(dev, "dig_ver:minor:%d, major:%d\n", dig_version[0],
 						dig_version[1]);
 		/* Digital controller >= 5.3 have hw_settle_2 option */
-		if (dig_version[0] >= ADC5_HW_SETTLE_DIFF_MINOR &&
-			dig_version[1] >= ADC5_HW_SETTLE_DIFF_MAJOR)
+		if ((dig_version[0] >= ADC5_HW_SETTLE_DIFF_MINOR &&
+			dig_version[1] >= ADC5_HW_SETTLE_DIFF_MAJOR) ||
+			adc->data->info == &adc7_info)
 			ret = adc5_hw_settle_time_from_dt(value,
 							data->hw_settle_2);
 		else
@@ -629,6 +808,7 @@ static const struct adc5_data adc5_data_pmic = {
 	.full_scale_code_volt = 0x70e4,
 	.full_scale_code_cur = 0x2710,
 	.adc_chans = adc5_chans_pmic,
+	.info = &adc5_info,
 	.decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
 				{250, 420, 840},
 	.hw_settle_1 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
@@ -639,10 +819,23 @@ static const struct adc5_data adc5_data_pmic = {
 				1, 2, 4, 8, 16, 32, 64, 128},
 };
 
+static const struct adc5_data adc7_data_pmic = {
+	.full_scale_code_volt = 0x70e4,
+	.adc_chans = adc7_chans_pmic,
+	.info = &adc7_info,
+	.decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
+				{85, 340, 1360},
+	.hw_settle_2 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
+				{15, 100, 200, 300, 400, 500, 600, 700,
+				1000, 2000, 4000, 8000, 16000, 32000,
+				64000, 128000},
+};
+
 static const struct adc5_data adc5_data_pmic_rev2 = {
 	.full_scale_code_volt = 0x4000,
 	.full_scale_code_cur = 0x1800,
 	.adc_chans = adc5_chans_rev2,
+	.info = &adc5_info,
 	.decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
 				{256, 512, 1024},
 	.hw_settle_1 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
@@ -659,6 +852,10 @@ static const struct of_device_id adc5_match_table[] = {
 		.data = &adc5_data_pmic,
 	},
 	{
+		.compatible = "qcom,spmi-adc7",
+		.data = &adc7_data_pmic,
+	},
+	{
 		.compatible = "qcom,spmi-adc-rev2",
 		.data = &adc5_data_pmic_rev2,
 	},
@@ -752,12 +949,13 @@ static int adc5_probe(struct platform_device *pdev)
 	adc->regmap = regmap;
 	adc->dev = dev;
 	adc->base = reg;
+
 	init_completion(&adc->complete);
 	mutex_init(&adc->lock);
 
 	ret = adc5_get_dt_data(adc, node);
 	if (ret) {
-		pr_err("adc get dt data failed\n");
+		dev_err(dev, "adc get dt data failed\n");
 		return ret;
 	}
 
@@ -773,11 +971,9 @@ static int adc5_probe(struct platform_device *pdev)
 			return ret;
 	}
 
-	indio_dev->dev.parent = dev;
-	indio_dev->dev.of_node = node;
 	indio_dev->name = pdev->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
-	indio_dev->info = &adc5_info;
+	indio_dev->info = adc->data->info;
 	indio_dev->channels = adc->iio_chans;
 	indio_dev->num_channels = adc->nchannels;
 
diff --git a/drivers/iio/adc/qcom-spmi-iadc.c b/drivers/iio/adc/qcom-spmi-iadc.c
index 46858eddf1c3..acbda6636dc5 100644
--- a/drivers/iio/adc/qcom-spmi-iadc.c
+++ b/drivers/iio/adc/qcom-spmi-iadc.c
@@ -553,8 +553,6 @@ static int iadc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	indio_dev->dev.parent = dev;
-	indio_dev->dev.of_node = node;
 	indio_dev->name = pdev->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &iadc_info;
diff --git a/drivers/iio/adc/qcom-spmi-vadc.c b/drivers/iio/adc/qcom-spmi-vadc.c
index 203ad59da336..b0388f8a69f4 100644
--- a/drivers/iio/adc/qcom-spmi-vadc.c
+++ b/drivers/iio/adc/qcom-spmi-vadc.c
@@ -907,8 +907,6 @@ static int vadc_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	indio_dev->dev.parent = dev;
-	indio_dev->dev.of_node = node;
 	indio_dev->name = pdev->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &vadc_info;
diff --git a/drivers/iio/adc/qcom-vadc-common.c b/drivers/iio/adc/qcom-vadc-common.c
index 2bb78d1c4daa..5113aaa6ba67 100644
--- a/drivers/iio/adc/qcom-vadc-common.c
+++ b/drivers/iio/adc/qcom-vadc-common.c
@@ -89,6 +89,195 @@ static const struct vadc_map_pt adcmap_100k_104ef_104fb_1875_vref[] = {
 	{ 46,	125000 },
 };
 
+static const struct vadc_map_pt adcmap7_die_temp[] = {
+	{ 433700, 1967},
+	{ 473100, 1964},
+	{ 512400, 1957},
+	{ 551500, 1949},
+	{ 590500, 1940},
+	{ 629300, 1930},
+	{ 667900, 1921},
+	{ 706400, 1910},
+	{ 744600, 1896},
+	{ 782500, 1878},
+	{ 820100, 1859},
+	{ 857300, 0},
+};
+
+/*
+ * Resistance to temperature table for 100k pull up for NTCG104EF104.
+ */
+static const struct vadc_map_pt adcmap7_100k[] = {
+	{ 4250657, -40960 },
+	{ 3962085, -39936 },
+	{ 3694875, -38912 },
+	{ 3447322, -37888 },
+	{ 3217867, -36864 },
+	{ 3005082, -35840 },
+	{ 2807660, -34816 },
+	{ 2624405, -33792 },
+	{ 2454218, -32768 },
+	{ 2296094, -31744 },
+	{ 2149108, -30720 },
+	{ 2012414, -29696 },
+	{ 1885232, -28672 },
+	{ 1766846, -27648 },
+	{ 1656598, -26624 },
+	{ 1553884, -25600 },
+	{ 1458147, -24576 },
+	{ 1368873, -23552 },
+	{ 1285590, -22528 },
+	{ 1207863, -21504 },
+	{ 1135290, -20480 },
+	{ 1067501, -19456 },
+	{ 1004155, -18432 },
+	{ 944935, -17408 },
+	{ 889550, -16384 },
+	{ 837731, -15360 },
+	{ 789229, -14336 },
+	{ 743813, -13312 },
+	{ 701271, -12288 },
+	{ 661405, -11264 },
+	{ 624032, -10240 },
+	{ 588982, -9216 },
+	{ 556100, -8192 },
+	{ 525239, -7168 },
+	{ 496264, -6144 },
+	{ 469050, -5120 },
+	{ 443480, -4096 },
+	{ 419448, -3072 },
+	{ 396851, -2048 },
+	{ 375597, -1024 },
+	{ 355598, 0 },
+	{ 336775, 1024 },
+	{ 319052, 2048 },
+	{ 302359, 3072 },
+	{ 286630, 4096 },
+	{ 271806, 5120 },
+	{ 257829, 6144 },
+	{ 244646, 7168 },
+	{ 232209, 8192 },
+	{ 220471, 9216 },
+	{ 209390, 10240 },
+	{ 198926, 11264 },
+	{ 189040, 12288 },
+	{ 179698, 13312 },
+	{ 170868, 14336 },
+	{ 162519, 15360 },
+	{ 154622, 16384 },
+	{ 147150, 17408 },
+	{ 140079, 18432 },
+	{ 133385, 19456 },
+	{ 127046, 20480 },
+	{ 121042, 21504 },
+	{ 115352, 22528 },
+	{ 109960, 23552 },
+	{ 104848, 24576 },
+	{ 100000, 25600 },
+	{ 95402, 26624 },
+	{ 91038, 27648 },
+	{ 86897, 28672 },
+	{ 82965, 29696 },
+	{ 79232, 30720 },
+	{ 75686, 31744 },
+	{ 72316, 32768 },
+	{ 69114, 33792 },
+	{ 66070, 34816 },
+	{ 63176, 35840 },
+	{ 60423, 36864 },
+	{ 57804, 37888 },
+	{ 55312, 38912 },
+	{ 52940, 39936 },
+	{ 50681, 40960 },
+	{ 48531, 41984 },
+	{ 46482, 43008 },
+	{ 44530, 44032 },
+	{ 42670, 45056 },
+	{ 40897, 46080 },
+	{ 39207, 47104 },
+	{ 37595, 48128 },
+	{ 36057, 49152 },
+	{ 34590, 50176 },
+	{ 33190, 51200 },
+	{ 31853, 52224 },
+	{ 30577, 53248 },
+	{ 29358, 54272 },
+	{ 28194, 55296 },
+	{ 27082, 56320 },
+	{ 26020, 57344 },
+	{ 25004, 58368 },
+	{ 24033, 59392 },
+	{ 23104, 60416 },
+	{ 22216, 61440 },
+	{ 21367, 62464 },
+	{ 20554, 63488 },
+	{ 19776, 64512 },
+	{ 19031, 65536 },
+	{ 18318, 66560 },
+	{ 17636, 67584 },
+	{ 16982, 68608 },
+	{ 16355, 69632 },
+	{ 15755, 70656 },
+	{ 15180, 71680 },
+	{ 14628, 72704 },
+	{ 14099, 73728 },
+	{ 13592, 74752 },
+	{ 13106, 75776 },
+	{ 12640, 76800 },
+	{ 12192, 77824 },
+	{ 11762, 78848 },
+	{ 11350, 79872 },
+	{ 10954, 80896 },
+	{ 10574, 81920 },
+	{ 10209, 82944 },
+	{ 9858, 83968 },
+	{ 9521, 84992 },
+	{ 9197, 86016 },
+	{ 8886, 87040 },
+	{ 8587, 88064 },
+	{ 8299, 89088 },
+	{ 8023, 90112 },
+	{ 7757, 91136 },
+	{ 7501, 92160 },
+	{ 7254, 93184 },
+	{ 7017, 94208 },
+	{ 6789, 95232 },
+	{ 6570, 96256 },
+	{ 6358, 97280 },
+	{ 6155, 98304 },
+	{ 5959, 99328 },
+	{ 5770, 100352 },
+	{ 5588, 101376 },
+	{ 5412, 102400 },
+	{ 5243, 103424 },
+	{ 5080, 104448 },
+	{ 4923, 105472 },
+	{ 4771, 106496 },
+	{ 4625, 107520 },
+	{ 4484, 108544 },
+	{ 4348, 109568 },
+	{ 4217, 110592 },
+	{ 4090, 111616 },
+	{ 3968, 112640 },
+	{ 3850, 113664 },
+	{ 3736, 114688 },
+	{ 3626, 115712 },
+	{ 3519, 116736 },
+	{ 3417, 117760 },
+	{ 3317, 118784 },
+	{ 3221, 119808 },
+	{ 3129, 120832 },
+	{ 3039, 121856 },
+	{ 2952, 122880 },
+	{ 2868, 123904 },
+	{ 2787, 124928 },
+	{ 2709, 125952 },
+	{ 2633, 126976 },
+	{ 2560, 128000 },
+	{ 2489, 129024 },
+	{ 2420, 130048 }
+};
+
 static int qcom_vadc_scale_hw_calib_volt(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
@@ -97,6 +286,10 @@ static int qcom_vadc_scale_hw_calib_therm(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
 				u16 adc_code, int *result_mdec);
+static int qcom_vadc7_scale_hw_calib_therm(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec);
 static int qcom_vadc_scale_hw_smb_temp(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
@@ -109,12 +302,20 @@ static int qcom_vadc_scale_hw_calib_die_temp(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
 				u16 adc_code, int *result_mdec);
+static int qcom_vadc7_scale_hw_calib_die_temp(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec);
 
 static struct qcom_adc5_scale_type scale_adc5_fn[] = {
 	[SCALE_HW_CALIB_DEFAULT] = {qcom_vadc_scale_hw_calib_volt},
 	[SCALE_HW_CALIB_THERM_100K_PULLUP] = {qcom_vadc_scale_hw_calib_therm},
 	[SCALE_HW_CALIB_XOTHERM] = {qcom_vadc_scale_hw_calib_therm},
+	[SCALE_HW_CALIB_THERM_100K_PU_PM7] = {
+					qcom_vadc7_scale_hw_calib_therm},
 	[SCALE_HW_CALIB_PMIC_THERM] = {qcom_vadc_scale_hw_calib_die_temp},
+	[SCALE_HW_CALIB_PMIC_THERM_PM7] = {
+					qcom_vadc7_scale_hw_calib_die_temp},
 	[SCALE_HW_CALIB_PM5_CHG_TEMP] = {qcom_vadc_scale_hw_chg5_temp},
 	[SCALE_HW_CALIB_PM5_SMB_TEMP] = {qcom_vadc_scale_hw_smb_temp},
 };
@@ -291,6 +492,32 @@ static int qcom_vadc_scale_code_voltage_factor(u16 adc_code,
 	return (int) voltage;
 }
 
+static int qcom_vadc7_scale_hw_calib_therm(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec)
+{
+	s64 resistance = adc_code;
+	int ret, result;
+
+	if (adc_code >= RATIO_MAX_ADC7)
+		return -EINVAL;
+
+	/* (ADC code * R_PULLUP (100Kohm)) / (full_scale_code - ADC code)*/
+	resistance *= R_PU_100K;
+	resistance = div64_s64(resistance, RATIO_MAX_ADC7 - adc_code);
+
+	ret = qcom_vadc_map_voltage_temp(adcmap7_100k,
+				 ARRAY_SIZE(adcmap7_100k),
+				 resistance, &result);
+	if (ret)
+		return ret;
+
+	*result_mdec = result;
+
+	return 0;
+}
+
 static int qcom_vadc_scale_hw_calib_volt(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
@@ -330,6 +557,41 @@ static int qcom_vadc_scale_hw_calib_die_temp(
 	return 0;
 }
 
+static int qcom_vadc7_scale_hw_calib_die_temp(
+				const struct vadc_prescale_ratio *prescale,
+				const struct adc5_data *data,
+				u16 adc_code, int *result_mdec)
+{
+
+	int voltage, vtemp0, temp, i;
+
+	voltage = qcom_vadc_scale_code_voltage_factor(adc_code,
+				prescale, data, 1);
+
+	if (adcmap7_die_temp[0].x > voltage) {
+		*result_mdec = DIE_TEMP_ADC7_SCALE_1;
+		return 0;
+	}
+
+	if (adcmap7_die_temp[ARRAY_SIZE(adcmap7_die_temp) - 1].x <= voltage) {
+		*result_mdec = DIE_TEMP_ADC7_MAX;
+		return 0;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(adcmap7_die_temp); i++)
+		if (adcmap7_die_temp[i].x > voltage)
+			break;
+
+	vtemp0 = adcmap7_die_temp[i - 1].x;
+	voltage = voltage - vtemp0;
+	temp = div64_s64(voltage * DIE_TEMP_ADC7_SCALE_FACTOR,
+		adcmap7_die_temp[i - 1].y);
+	temp += DIE_TEMP_ADC7_SCALE_1 + (DIE_TEMP_ADC7_SCALE_2 * (i - 1));
+	*result_mdec = temp;
+
+	return 0;
+}
+
 static int qcom_vadc_scale_hw_smb_temp(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
diff --git a/drivers/iio/adc/qcom-vadc-common.h b/drivers/iio/adc/qcom-vadc-common.h
index e074902a24cc..17b2fc4d8bf2 100644
--- a/drivers/iio/adc/qcom-vadc-common.h
+++ b/drivers/iio/adc/qcom-vadc-common.h
@@ -49,6 +49,14 @@
 #define ADC5_FULL_SCALE_CODE			0x70e4
 #define ADC5_USR_DATA_CHECK			0x8000
 
+#define R_PU_100K				100000
+#define RATIO_MAX_ADC7				BIT(14)
+
+#define DIE_TEMP_ADC7_SCALE_1			-60000
+#define DIE_TEMP_ADC7_SCALE_2			20000
+#define DIE_TEMP_ADC7_SCALE_FACTOR		1000
+#define DIE_TEMP_ADC7_MAX			160000
+
 /**
  * struct vadc_map_pt - Map the graph representation for ADC channel
  * @x: Represent the ADC digitized code.
@@ -110,8 +118,12 @@ struct vadc_prescale_ratio {
  *	lookup table. The hardware applies offset/slope to adc code.
  * SCALE_HW_CALIB_XOTHERM: Returns XO thermistor voltage in millidegC using
  *	100k pullup. The hardware applies offset/slope to adc code.
+ * SCALE_HW_CALIB_THERM_100K_PU_PM7: Returns temperature in millidegC using
+ *	lookup table for PMIC7. The hardware applies offset/slope to adc code.
  * SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade.
  *	The hardware applies offset/slope to adc code.
+ * SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade.
+ *	The hardware applies offset/slope to adc code. This is for PMIC7.
  * SCALE_HW_CALIB_PM5_CHG_TEMP: Returns result in millidegrees for PMIC5
  *	charger temperature.
  * SCALE_HW_CALIB_PM5_SMB_TEMP: Returns result in millidegrees for PMIC5
@@ -126,7 +138,9 @@ enum vadc_scale_fn_type {
 	SCALE_HW_CALIB_DEFAULT,
 	SCALE_HW_CALIB_THERM_100K_PULLUP,
 	SCALE_HW_CALIB_XOTHERM,
+	SCALE_HW_CALIB_THERM_100K_PU_PM7,
 	SCALE_HW_CALIB_PMIC_THERM,
+	SCALE_HW_CALIB_PMIC_THERM_PM7,
 	SCALE_HW_CALIB_PM5_CHG_TEMP,
 	SCALE_HW_CALIB_PM5_SMB_TEMP,
 	SCALE_HW_CALIB_INVALID,
@@ -136,6 +150,7 @@ struct adc5_data {
 	const u32	full_scale_code_volt;
 	const u32	full_scale_code_cur;
 	const struct adc5_channels *adc_chans;
+	const struct iio_info *info;
 	unsigned int	*decimation;
 	unsigned int	*hw_settle_1;
 	unsigned int	*hw_settle_2;
diff --git a/drivers/iio/adc/rcar-gyroadc.c b/drivers/iio/adc/rcar-gyroadc.c
index 63ce743ee7af..d2c1419e72a0 100644
--- a/drivers/iio/adc/rcar-gyroadc.c
+++ b/drivers/iio/adc/rcar-gyroadc.c
@@ -516,8 +516,6 @@ static int rcar_gyroadc_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, indio_dev);
 
 	indio_dev->name = DRIVER_NAME;
-	indio_dev->dev.parent = dev;
-	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->info = &rcar_gyroadc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
diff --git a/drivers/iio/adc/rn5t618-adc.c b/drivers/iio/adc/rn5t618-adc.c
index f21027e4e26a..7010c4276947 100644
--- a/drivers/iio/adc/rn5t618-adc.c
+++ b/drivers/iio/adc/rn5t618-adc.c
@@ -218,7 +218,6 @@ static int rn5t618_adc_probe(struct platform_device *pdev)
 	init_completion(&adc->conv_completion);
 
 	iio_dev->name = dev_name(&pdev->dev);
-	iio_dev->dev.parent = &pdev->dev;
 	iio_dev->info = &rn5t618_adc_iio_info;
 	iio_dev->modes = INDIO_DIRECT_MODE;
 	iio_dev->channels = rn5t618_adc_iio_channels;
diff --git a/drivers/iio/adc/rockchip_saradc.c b/drivers/iio/adc/rockchip_saradc.c
index 582ba047c4a6..1f3d7d639d37 100644
--- a/drivers/iio/adc/rockchip_saradc.c
+++ b/drivers/iio/adc/rockchip_saradc.c
@@ -15,7 +15,10 @@
 #include <linux/delay.h>
 #include <linux/reset.h>
 #include <linux/regulator/consumer.h>
+#include <linux/iio/buffer.h>
 #include <linux/iio/iio.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
 
 #define SARADC_DATA			0x00
 
@@ -32,9 +35,9 @@
 #define SARADC_DLY_PU_SOC_MASK		0x3f
 
 #define SARADC_TIMEOUT			msecs_to_jiffies(100)
+#define SARADC_MAX_CHANNELS		6
 
 struct rockchip_saradc_data {
-	int				num_bits;
 	const struct iio_chan_spec	*channels;
 	int				num_channels;
 	unsigned long			clk_rate;
@@ -49,8 +52,37 @@ struct rockchip_saradc {
 	struct reset_control	*reset;
 	const struct rockchip_saradc_data *data;
 	u16			last_val;
+	const struct iio_chan_spec *last_chan;
 };
 
+static void rockchip_saradc_power_down(struct rockchip_saradc *info)
+{
+	/* Clear irq & power down adc */
+	writel_relaxed(0, info->regs + SARADC_CTRL);
+}
+
+static int rockchip_saradc_conversion(struct rockchip_saradc *info,
+				   struct iio_chan_spec const *chan)
+{
+	reinit_completion(&info->completion);
+
+	/* 8 clock periods as delay between power up and start cmd */
+	writel_relaxed(8, info->regs + SARADC_DLY_PU_SOC);
+
+	info->last_chan = chan;
+
+	/* Select the channel to be used and trigger conversion */
+	writel(SARADC_CTRL_POWER_CTRL
+			| (chan->channel & SARADC_CTRL_CHN_MASK)
+			| SARADC_CTRL_IRQ_ENABLE,
+		   info->regs + SARADC_CTRL);
+
+	if (!wait_for_completion_timeout(&info->completion, SARADC_TIMEOUT))
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
 static int rockchip_saradc_read_raw(struct iio_dev *indio_dev,
 				    struct iio_chan_spec const *chan,
 				    int *val, int *val2, long mask)
@@ -62,22 +94,11 @@ static int rockchip_saradc_read_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_RAW:
 		mutex_lock(&indio_dev->mlock);
 
-		reinit_completion(&info->completion);
-
-		/* 8 clock periods as delay between power up and start cmd */
-		writel_relaxed(8, info->regs + SARADC_DLY_PU_SOC);
-
-		/* Select the channel to be used and trigger conversion */
-		writel(SARADC_CTRL_POWER_CTRL
-				| (chan->channel & SARADC_CTRL_CHN_MASK)
-				| SARADC_CTRL_IRQ_ENABLE,
-		       info->regs + SARADC_CTRL);
-
-		if (!wait_for_completion_timeout(&info->completion,
-						 SARADC_TIMEOUT)) {
-			writel_relaxed(0, info->regs + SARADC_CTRL);
+		ret = rockchip_saradc_conversion(info, chan);
+		if (ret) {
+			rockchip_saradc_power_down(info);
 			mutex_unlock(&indio_dev->mlock);
-			return -ETIMEDOUT;
+			return ret;
 		}
 
 		*val = info->last_val;
@@ -91,7 +112,7 @@ static int rockchip_saradc_read_raw(struct iio_dev *indio_dev,
 		}
 
 		*val = ret / 1000;
-		*val2 = info->data->num_bits;
+		*val2 = chan->scan_type.realbits;
 		return IIO_VAL_FRACTIONAL_LOG2;
 	default:
 		return -EINVAL;
@@ -104,10 +125,9 @@ static irqreturn_t rockchip_saradc_isr(int irq, void *dev_id)
 
 	/* Read value */
 	info->last_val = readl_relaxed(info->regs + SARADC_DATA);
-	info->last_val &= GENMASK(info->data->num_bits - 1, 0);
+	info->last_val &= GENMASK(info->last_chan->scan_type.realbits - 1, 0);
 
-	/* Clear irq & power down adc */
-	writel_relaxed(0, info->regs + SARADC_CTRL);
+	rockchip_saradc_power_down(info);
 
 	complete(&info->completion);
 
@@ -118,51 +138,55 @@ static const struct iio_info rockchip_saradc_iio_info = {
 	.read_raw = rockchip_saradc_read_raw,
 };
 
-#define ADC_CHANNEL(_index, _id) {				\
+#define SARADC_CHANNEL(_index, _id, _res) {			\
 	.type = IIO_VOLTAGE,					\
 	.indexed = 1,						\
 	.channel = _index,					\
 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),		\
 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),	\
 	.datasheet_name = _id,					\
+	.scan_index = _index,					\
+	.scan_type = {						\
+		.sign = 'u',					\
+		.realbits = _res,				\
+		.storagebits = 16,				\
+		.endianness = IIO_CPU,				\
+	},							\
 }
 
 static const struct iio_chan_spec rockchip_saradc_iio_channels[] = {
-	ADC_CHANNEL(0, "adc0"),
-	ADC_CHANNEL(1, "adc1"),
-	ADC_CHANNEL(2, "adc2"),
+	SARADC_CHANNEL(0, "adc0", 10),
+	SARADC_CHANNEL(1, "adc1", 10),
+	SARADC_CHANNEL(2, "adc2", 10),
 };
 
 static const struct rockchip_saradc_data saradc_data = {
-	.num_bits = 10,
 	.channels = rockchip_saradc_iio_channels,
 	.num_channels = ARRAY_SIZE(rockchip_saradc_iio_channels),
 	.clk_rate = 1000000,
 };
 
 static const struct iio_chan_spec rockchip_rk3066_tsadc_iio_channels[] = {
-	ADC_CHANNEL(0, "adc0"),
-	ADC_CHANNEL(1, "adc1"),
+	SARADC_CHANNEL(0, "adc0", 12),
+	SARADC_CHANNEL(1, "adc1", 12),
 };
 
 static const struct rockchip_saradc_data rk3066_tsadc_data = {
-	.num_bits = 12,
 	.channels = rockchip_rk3066_tsadc_iio_channels,
 	.num_channels = ARRAY_SIZE(rockchip_rk3066_tsadc_iio_channels),
 	.clk_rate = 50000,
 };
 
 static const struct iio_chan_spec rockchip_rk3399_saradc_iio_channels[] = {
-	ADC_CHANNEL(0, "adc0"),
-	ADC_CHANNEL(1, "adc1"),
-	ADC_CHANNEL(2, "adc2"),
-	ADC_CHANNEL(3, "adc3"),
-	ADC_CHANNEL(4, "adc4"),
-	ADC_CHANNEL(5, "adc5"),
+	SARADC_CHANNEL(0, "adc0", 10),
+	SARADC_CHANNEL(1, "adc1", 10),
+	SARADC_CHANNEL(2, "adc2", 10),
+	SARADC_CHANNEL(3, "adc3", 10),
+	SARADC_CHANNEL(4, "adc4", 10),
+	SARADC_CHANNEL(5, "adc5", 10),
 };
 
 static const struct rockchip_saradc_data rk3399_saradc_data = {
-	.num_bits = 10,
 	.channels = rockchip_rk3399_saradc_iio_channels,
 	.num_channels = ARRAY_SIZE(rockchip_rk3399_saradc_iio_channels),
 	.clk_rate = 1000000,
@@ -183,7 +207,7 @@ static const struct of_device_id rockchip_saradc_match[] = {
 };
 MODULE_DEVICE_TABLE(of, rockchip_saradc_match);
 
-/**
+/*
  * Reset SARADC Controller.
  */
 static void rockchip_saradc_reset_controller(struct reset_control *reset)
@@ -193,6 +217,67 @@ static void rockchip_saradc_reset_controller(struct reset_control *reset)
 	reset_control_deassert(reset);
 }
 
+static void rockchip_saradc_clk_disable(void *data)
+{
+	struct rockchip_saradc *info = data;
+
+	clk_disable_unprepare(info->clk);
+}
+
+static void rockchip_saradc_pclk_disable(void *data)
+{
+	struct rockchip_saradc *info = data;
+
+	clk_disable_unprepare(info->pclk);
+}
+
+static void rockchip_saradc_regulator_disable(void *data)
+{
+	struct rockchip_saradc *info = data;
+
+	regulator_disable(info->vref);
+}
+
+static irqreturn_t rockchip_saradc_trigger_handler(int irq, void *p)
+{
+	struct iio_poll_func *pf = p;
+	struct iio_dev *i_dev = pf->indio_dev;
+	struct rockchip_saradc *info = iio_priv(i_dev);
+	/*
+	 * @values: each channel takes an u16 value
+	 * @timestamp: will be 8-byte aligned automatically
+	 */
+	struct {
+		u16 values[SARADC_MAX_CHANNELS];
+		int64_t timestamp;
+	} data;
+	int ret;
+	int i, j = 0;
+
+	mutex_lock(&i_dev->mlock);
+
+	for_each_set_bit(i, i_dev->active_scan_mask, i_dev->masklength) {
+		const struct iio_chan_spec *chan = &i_dev->channels[i];
+
+		ret = rockchip_saradc_conversion(info, chan);
+		if (ret) {
+			rockchip_saradc_power_down(info);
+			goto out;
+		}
+
+		data.values[j] = info->last_val;
+		j++;
+	}
+
+	iio_push_to_buffers_with_timestamp(i_dev, &data, iio_get_time_ns(i_dev));
+out:
+	mutex_unlock(&i_dev->mlock);
+
+	iio_trigger_notify_done(i_dev->trig);
+
+	return IRQ_HANDLED;
+}
+
 static int rockchip_saradc_probe(struct platform_device *pdev)
 {
 	struct rockchip_saradc *info = NULL;
@@ -221,6 +306,12 @@ static int rockchip_saradc_probe(struct platform_device *pdev)
 
 	info->data = match->data;
 
+	/* Sanity check for possible later IP variants with more channels */
+	if (info->data->num_channels > SARADC_MAX_CHANNELS) {
+		dev_err(&pdev->dev, "max channels exceeded");
+		return -EINVAL;
+	}
+
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	info->regs = devm_ioremap_resource(&pdev->dev, mem);
 	if (IS_ERR(info->regs))
@@ -291,56 +382,55 @@ static int rockchip_saradc_probe(struct platform_device *pdev)
 		dev_err(&pdev->dev, "failed to enable vref regulator\n");
 		return ret;
 	}
+	ret = devm_add_action_or_reset(&pdev->dev,
+				       rockchip_saradc_regulator_disable, info);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register devm action, %d\n",
+			ret);
+		return ret;
+	}
 
 	ret = clk_prepare_enable(info->pclk);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to enable pclk\n");
-		goto err_reg_voltage;
+		return ret;
+	}
+	ret = devm_add_action_or_reset(&pdev->dev,
+				       rockchip_saradc_pclk_disable, info);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register devm action, %d\n",
+			ret);
+		return ret;
 	}
 
 	ret = clk_prepare_enable(info->clk);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to enable converter clock\n");
-		goto err_pclk;
+		return ret;
+	}
+	ret = devm_add_action_or_reset(&pdev->dev,
+				       rockchip_saradc_clk_disable, info);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register devm action, %d\n",
+			ret);
+		return ret;
 	}
 
 	platform_set_drvdata(pdev, indio_dev);
 
 	indio_dev->name = dev_name(&pdev->dev);
-	indio_dev->dev.parent = &pdev->dev;
-	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->info = &rockchip_saradc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
 	indio_dev->channels = info->data->channels;
 	indio_dev->num_channels = info->data->num_channels;
-
-	ret = iio_device_register(indio_dev);
+	ret = devm_iio_triggered_buffer_setup(&indio_dev->dev, indio_dev, NULL,
+					      rockchip_saradc_trigger_handler,
+					      NULL);
 	if (ret)
-		goto err_clk;
-
-	return 0;
-
-err_clk:
-	clk_disable_unprepare(info->clk);
-err_pclk:
-	clk_disable_unprepare(info->pclk);
-err_reg_voltage:
-	regulator_disable(info->vref);
-	return ret;
-}
-
-static int rockchip_saradc_remove(struct platform_device *pdev)
-{
-	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
-	struct rockchip_saradc *info = iio_priv(indio_dev);
-
-	iio_device_unregister(indio_dev);
-	clk_disable_unprepare(info->clk);
-	clk_disable_unprepare(info->pclk);
-	regulator_disable(info->vref);
+		return ret;
 
-	return 0;
+	return devm_iio_device_register(&pdev->dev, indio_dev);
 }
 
 #ifdef CONFIG_PM_SLEEP
@@ -383,7 +473,6 @@ static SIMPLE_DEV_PM_OPS(rockchip_saradc_pm_ops,
 
 static struct platform_driver rockchip_saradc_driver = {
 	.probe		= rockchip_saradc_probe,
-	.remove		= rockchip_saradc_remove,
 	.driver		= {
 		.name	= "rockchip-saradc",
 		.of_match_table = rockchip_saradc_match,
diff --git a/drivers/iio/adc/sc27xx_adc.c b/drivers/iio/adc/sc27xx_adc.c
index 66b387f9b36d..aa32a1f385e2 100644
--- a/drivers/iio/adc/sc27xx_adc.c
+++ b/drivers/iio/adc/sc27xx_adc.c
@@ -533,7 +533,6 @@ static int sc27xx_adc_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	indio_dev->dev.parent = dev;
 	indio_dev->name = dev_name(dev);
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &sc27xx_info;
diff --git a/drivers/iio/adc/sd_adc_modulator.c b/drivers/iio/adc/sd_adc_modulator.c
index 560d8c7d9d86..327cc2097f6c 100644
--- a/drivers/iio/adc/sd_adc_modulator.c
+++ b/drivers/iio/adc/sd_adc_modulator.c
@@ -9,7 +9,8 @@
 #include <linux/iio/iio.h>
 #include <linux/iio/triggered_buffer.h>
 #include <linux/module.h>
-#include <linux/of_device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
 
 static const struct iio_info iio_sd_mod_iio_info;
 
@@ -32,8 +33,6 @@ static int iio_sd_mod_probe(struct platform_device *pdev)
 	if (!iio)
 		return -ENOMEM;
 
-	iio->dev.parent = dev;
-	iio->dev.of_node = dev->of_node;
 	iio->name = dev_name(dev);
 	iio->info = &iio_sd_mod_iio_info;
 	iio->modes = INDIO_BUFFER_HARDWARE;
@@ -56,7 +55,7 @@ MODULE_DEVICE_TABLE(of, sd_adc_of_match);
 static struct platform_driver iio_sd_mod_adc = {
 	.driver = {
 		.name = "iio_sd_adc_mod",
-		.of_match_table = of_match_ptr(sd_adc_of_match),
+		.of_match_table = sd_adc_of_match,
 	},
 	.probe = iio_sd_mod_probe,
 };
diff --git a/drivers/iio/adc/spear_adc.c b/drivers/iio/adc/spear_adc.c
index 0ad536494e8f..1bc986a7009d 100644
--- a/drivers/iio/adc/spear_adc.c
+++ b/drivers/iio/adc/spear_adc.c
@@ -336,7 +336,6 @@ static int spear_adc_probe(struct platform_device *pdev)
 	init_completion(&st->completion);
 
 	indio_dev->name = SPEAR_ADC_MOD_NAME;
-	indio_dev->dev.parent = dev;
 	indio_dev->info = &spear_adc_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = spear_adc_iio_channels;
diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c
index dfc3a306c667..3eb9ebe8372f 100644
--- a/drivers/iio/adc/stm32-adc.c
+++ b/drivers/iio/adc/stm32-adc.c
@@ -162,10 +162,10 @@ struct stm32_adc_cfg {
 	struct stm32_adc_trig_info	*trigs;
 	bool clk_required;
 	bool has_vregready;
-	int (*prepare)(struct stm32_adc *);
-	void (*start_conv)(struct stm32_adc *, bool dma);
-	void (*stop_conv)(struct stm32_adc *);
-	void (*unprepare)(struct stm32_adc *);
+	int (*prepare)(struct iio_dev *);
+	void (*start_conv)(struct iio_dev *, bool dma);
+	void (*stop_conv)(struct iio_dev *);
+	void (*unprepare)(struct iio_dev *);
 	const unsigned int *smp_cycles;
 };
 
@@ -538,10 +538,11 @@ static void stm32_adc_set_res(struct stm32_adc *adc)
 
 static int stm32_adc_hw_stop(struct device *dev)
 {
-	struct stm32_adc *adc = dev_get_drvdata(dev);
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct stm32_adc *adc = iio_priv(indio_dev);
 
 	if (adc->cfg->unprepare)
-		adc->cfg->unprepare(adc);
+		adc->cfg->unprepare(indio_dev);
 
 	if (adc->clk)
 		clk_disable_unprepare(adc->clk);
@@ -551,7 +552,8 @@ static int stm32_adc_hw_stop(struct device *dev)
 
 static int stm32_adc_hw_start(struct device *dev)
 {
-	struct stm32_adc *adc = dev_get_drvdata(dev);
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct stm32_adc *adc = iio_priv(indio_dev);
 	int ret;
 
 	if (adc->clk) {
@@ -563,7 +565,7 @@ static int stm32_adc_hw_start(struct device *dev)
 	stm32_adc_set_res(adc);
 
 	if (adc->cfg->prepare) {
-		ret = adc->cfg->prepare(adc);
+		ret = adc->cfg->prepare(indio_dev);
 		if (ret)
 			goto err_clk_dis;
 	}
@@ -579,7 +581,7 @@ err_clk_dis:
 
 /**
  * stm32f4_adc_start_conv() - Start conversions for regular channels.
- * @adc: stm32 adc instance
+ * @indio_dev: IIO device instance
  * @dma: use dma to transfer conversion result
  *
  * Start conversions for regular channels.
@@ -587,8 +589,10 @@ err_clk_dis:
  * conversions, in IIO buffer modes. Otherwise, use ADC interrupt with direct
  * DR read instead (e.g. read_raw, or triggered buffer mode without DMA).
  */
-static void stm32f4_adc_start_conv(struct stm32_adc *adc, bool dma)
+static void stm32f4_adc_start_conv(struct iio_dev *indio_dev, bool dma)
 {
+	struct stm32_adc *adc = iio_priv(indio_dev);
+
 	stm32_adc_set_bits(adc, STM32F4_ADC_CR1, STM32F4_SCAN);
 
 	if (dma)
@@ -605,8 +609,10 @@ static void stm32f4_adc_start_conv(struct stm32_adc *adc, bool dma)
 		stm32_adc_set_bits(adc, STM32F4_ADC_CR2, STM32F4_SWSTART);
 }
 
-static void stm32f4_adc_stop_conv(struct stm32_adc *adc)
+static void stm32f4_adc_stop_conv(struct iio_dev *indio_dev)
 {
+	struct stm32_adc *adc = iio_priv(indio_dev);
+
 	stm32_adc_clr_bits(adc, STM32F4_ADC_CR2, STM32F4_EXTEN_MASK);
 	stm32_adc_clr_bits(adc, STM32F4_ADC_SR, STM32F4_STRT);
 
@@ -615,8 +621,9 @@ static void stm32f4_adc_stop_conv(struct stm32_adc *adc)
 			   STM32F4_ADON | STM32F4_DMA | STM32F4_DDS);
 }
 
-static void stm32h7_adc_start_conv(struct stm32_adc *adc, bool dma)
+static void stm32h7_adc_start_conv(struct iio_dev *indio_dev, bool dma)
 {
+	struct stm32_adc *adc = iio_priv(indio_dev);
 	enum stm32h7_adc_dmngt dmngt;
 	unsigned long flags;
 	u32 val;
@@ -635,9 +642,9 @@ static void stm32h7_adc_start_conv(struct stm32_adc *adc, bool dma)
 	stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_ADSTART);
 }
 
-static void stm32h7_adc_stop_conv(struct stm32_adc *adc)
+static void stm32h7_adc_stop_conv(struct iio_dev *indio_dev)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct stm32_adc *adc = iio_priv(indio_dev);
 	int ret;
 	u32 val;
 
@@ -652,9 +659,9 @@ static void stm32h7_adc_stop_conv(struct stm32_adc *adc)
 	stm32_adc_clr_bits(adc, STM32H7_ADC_CFGR, STM32H7_DMNGT_MASK);
 }
 
-static int stm32h7_adc_exit_pwr_down(struct stm32_adc *adc)
+static int stm32h7_adc_exit_pwr_down(struct iio_dev *indio_dev)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct stm32_adc *adc = iio_priv(indio_dev);
 	int ret;
 	u32 val;
 
@@ -690,9 +697,9 @@ static void stm32h7_adc_enter_pwr_down(struct stm32_adc *adc)
 	stm32_adc_set_bits(adc, STM32H7_ADC_CR, STM32H7_DEEPPWD);
 }
 
-static int stm32h7_adc_enable(struct stm32_adc *adc)
+static int stm32h7_adc_enable(struct iio_dev *indio_dev)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct stm32_adc *adc = iio_priv(indio_dev);
 	int ret;
 	u32 val;
 
@@ -713,9 +720,9 @@ static int stm32h7_adc_enable(struct stm32_adc *adc)
 	return ret;
 }
 
-static void stm32h7_adc_disable(struct stm32_adc *adc)
+static void stm32h7_adc_disable(struct iio_dev *indio_dev)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct stm32_adc *adc = iio_priv(indio_dev);
 	int ret;
 	u32 val;
 
@@ -730,12 +737,12 @@ static void stm32h7_adc_disable(struct stm32_adc *adc)
 
 /**
  * stm32h7_adc_read_selfcalib() - read calibration shadow regs, save result
- * @adc: stm32 adc instance
+ * @indio_dev: IIO device instance
  * Note: Must be called once ADC is enabled, so LINCALRDYW[1..6] are writable
  */
-static int stm32h7_adc_read_selfcalib(struct stm32_adc *adc)
+static int stm32h7_adc_read_selfcalib(struct iio_dev *indio_dev)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct stm32_adc *adc = iio_priv(indio_dev);
 	int i, ret;
 	u32 lincalrdyw_mask, val;
 
@@ -774,12 +781,12 @@ static int stm32h7_adc_read_selfcalib(struct stm32_adc *adc)
 
 /**
  * stm32h7_adc_restore_selfcalib() - Restore saved self-calibration result
- * @adc: stm32 adc instance
+ * @indio_dev: IIO device instance
  * Note: ADC must be enabled, with no on-going conversions.
  */
-static int stm32h7_adc_restore_selfcalib(struct stm32_adc *adc)
+static int stm32h7_adc_restore_selfcalib(struct iio_dev *indio_dev)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct stm32_adc *adc = iio_priv(indio_dev);
 	int i, ret;
 	u32 lincalrdyw_mask, val;
 
@@ -847,12 +854,12 @@ static int stm32h7_adc_restore_selfcalib(struct stm32_adc *adc)
 
 /**
  * stm32h7_adc_selfcalib() - Procedure to calibrate ADC
- * @adc: stm32 adc instance
+ * @indio_dev: IIO device instance
  * Note: Must be called once ADC is out of power down.
  */
-static int stm32h7_adc_selfcalib(struct stm32_adc *adc)
+static int stm32h7_adc_selfcalib(struct iio_dev *indio_dev)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct stm32_adc *adc = iio_priv(indio_dev);
 	int ret;
 	u32 val;
 
@@ -903,7 +910,7 @@ out:
 
 /**
  * stm32h7_adc_prepare() - Leave power down mode to enable ADC.
- * @adc: stm32 adc instance
+ * @indio_dev: IIO device instance
  * Leave power down mode.
  * Configure channels as single ended or differential before enabling ADC.
  * Enable ADC.
@@ -912,30 +919,31 @@ out:
  * - Only one input is selected for single ended (e.g. 'vinp')
  * - Two inputs are selected for differential channels (e.g. 'vinp' & 'vinn')
  */
-static int stm32h7_adc_prepare(struct stm32_adc *adc)
+static int stm32h7_adc_prepare(struct iio_dev *indio_dev)
 {
+	struct stm32_adc *adc = iio_priv(indio_dev);
 	int calib, ret;
 
-	ret = stm32h7_adc_exit_pwr_down(adc);
+	ret = stm32h7_adc_exit_pwr_down(indio_dev);
 	if (ret)
 		return ret;
 
-	ret = stm32h7_adc_selfcalib(adc);
+	ret = stm32h7_adc_selfcalib(indio_dev);
 	if (ret < 0)
 		goto pwr_dwn;
 	calib = ret;
 
 	stm32_adc_writel(adc, STM32H7_ADC_DIFSEL, adc->difsel);
 
-	ret = stm32h7_adc_enable(adc);
+	ret = stm32h7_adc_enable(indio_dev);
 	if (ret)
 		goto pwr_dwn;
 
 	/* Either restore or read calibration result for future reference */
 	if (calib)
-		ret = stm32h7_adc_restore_selfcalib(adc);
+		ret = stm32h7_adc_restore_selfcalib(indio_dev);
 	else
-		ret = stm32h7_adc_read_selfcalib(adc);
+		ret = stm32h7_adc_read_selfcalib(indio_dev);
 	if (ret)
 		goto disable;
 
@@ -944,16 +952,18 @@ static int stm32h7_adc_prepare(struct stm32_adc *adc)
 	return 0;
 
 disable:
-	stm32h7_adc_disable(adc);
+	stm32h7_adc_disable(indio_dev);
 pwr_dwn:
 	stm32h7_adc_enter_pwr_down(adc);
 
 	return ret;
 }
 
-static void stm32h7_adc_unprepare(struct stm32_adc *adc)
+static void stm32h7_adc_unprepare(struct iio_dev *indio_dev)
 {
-	stm32h7_adc_disable(adc);
+	struct stm32_adc *adc = iio_priv(indio_dev);
+
+	stm32h7_adc_disable(indio_dev);
 	stm32h7_adc_enter_pwr_down(adc);
 }
 
@@ -1160,7 +1170,7 @@ static int stm32_adc_single_conv(struct iio_dev *indio_dev,
 
 	stm32_adc_conv_irq_enable(adc);
 
-	adc->cfg->start_conv(adc, false);
+	adc->cfg->start_conv(indio_dev, false);
 
 	timeout = wait_for_completion_interruptible_timeout(
 					&adc->completion, STM32_ADC_TIMEOUT);
@@ -1173,7 +1183,7 @@ static int stm32_adc_single_conv(struct iio_dev *indio_dev,
 		ret = IIO_VAL_INT;
 	}
 
-	adc->cfg->stop_conv(adc);
+	adc->cfg->stop_conv(indio_dev);
 
 	stm32_adc_conv_irq_disable(adc);
 
@@ -1227,8 +1237,8 @@ static int stm32_adc_read_raw(struct iio_dev *indio_dev,
 
 static irqreturn_t stm32_adc_threaded_isr(int irq, void *data)
 {
-	struct stm32_adc *adc = data;
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct iio_dev *indio_dev = data;
+	struct stm32_adc *adc = iio_priv(indio_dev);
 	const struct stm32_adc_regspec *regs = adc->cfg->regs;
 	u32 status = stm32_adc_readl(adc, regs->isr_eoc.reg);
 
@@ -1240,8 +1250,8 @@ static irqreturn_t stm32_adc_threaded_isr(int irq, void *data)
 
 static irqreturn_t stm32_adc_isr(int irq, void *data)
 {
-	struct stm32_adc *adc = data;
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct iio_dev *indio_dev = data;
+	struct stm32_adc *adc = iio_priv(indio_dev);
 	const struct stm32_adc_regspec *regs = adc->cfg->regs;
 	u32 status = stm32_adc_readl(adc, regs->isr_eoc.reg);
 
@@ -1482,7 +1492,7 @@ static int stm32_adc_dma_start(struct iio_dev *indio_dev)
 	return 0;
 }
 
-static int __stm32_adc_buffer_postenable(struct iio_dev *indio_dev)
+static int stm32_adc_buffer_postenable(struct iio_dev *indio_dev)
 {
 	struct stm32_adc *adc = iio_priv(indio_dev);
 	struct device *dev = indio_dev->dev.parent;
@@ -1514,7 +1524,7 @@ static int __stm32_adc_buffer_postenable(struct iio_dev *indio_dev)
 	if (!adc->dma_chan)
 		stm32_adc_conv_irq_enable(adc);
 
-	adc->cfg->start_conv(adc, !!adc->dma_chan);
+	adc->cfg->start_conv(indio_dev, !!adc->dma_chan);
 
 	return 0;
 
@@ -1527,27 +1537,12 @@ err_pm_put:
 	return ret;
 }
 
-static int stm32_adc_buffer_postenable(struct iio_dev *indio_dev)
-{
-	int ret;
-
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret < 0)
-		return ret;
-
-	ret = __stm32_adc_buffer_postenable(indio_dev);
-	if (ret < 0)
-		iio_triggered_buffer_predisable(indio_dev);
-
-	return ret;
-}
-
-static void __stm32_adc_buffer_predisable(struct iio_dev *indio_dev)
+static int stm32_adc_buffer_predisable(struct iio_dev *indio_dev)
 {
 	struct stm32_adc *adc = iio_priv(indio_dev);
 	struct device *dev = indio_dev->dev.parent;
 
-	adc->cfg->stop_conv(adc);
+	adc->cfg->stop_conv(indio_dev);
 	if (!adc->dma_chan)
 		stm32_adc_conv_irq_disable(adc);
 
@@ -1561,19 +1556,8 @@ static void __stm32_adc_buffer_predisable(struct iio_dev *indio_dev)
 
 	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
-}
-
-static int stm32_adc_buffer_predisable(struct iio_dev *indio_dev)
-{
-	int ret;
 
-	__stm32_adc_buffer_predisable(indio_dev);
-
-	ret = iio_triggered_buffer_predisable(indio_dev);
-	if (ret < 0)
-		dev_err(&indio_dev->dev, "predisable failed\n");
-
-	return ret;
+	return 0;
 }
 
 static const struct iio_buffer_setup_ops stm32_adc_buffer_setup_ops = {
@@ -1886,12 +1870,11 @@ static int stm32_adc_probe(struct platform_device *pdev)
 		of_match_device(dev->driver->of_match_table, dev)->data;
 
 	indio_dev->name = dev_name(&pdev->dev);
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->info = &stm32_adc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE | INDIO_HARDWARE_TRIGGERED;
 
-	platform_set_drvdata(pdev, adc);
+	platform_set_drvdata(pdev, indio_dev);
 
 	ret = of_property_read_u32(pdev->dev.of_node, "reg", &adc->offset);
 	if (ret != 0) {
@@ -1905,7 +1888,7 @@ static int stm32_adc_probe(struct platform_device *pdev)
 
 	ret = devm_request_threaded_irq(&pdev->dev, adc->irq, stm32_adc_isr,
 					stm32_adc_threaded_isr,
-					0, pdev->name, adc);
+					0, pdev->name, indio_dev);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to request IRQ\n");
 		return ret;
@@ -1989,8 +1972,8 @@ err_dma_disable:
 
 static int stm32_adc_remove(struct platform_device *pdev)
 {
-	struct stm32_adc *adc = platform_get_drvdata(pdev);
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+	struct stm32_adc *adc = iio_priv(indio_dev);
 
 	pm_runtime_get_sync(&pdev->dev);
 	iio_device_unregister(indio_dev);
@@ -2012,19 +1995,17 @@ static int stm32_adc_remove(struct platform_device *pdev)
 #if defined(CONFIG_PM_SLEEP)
 static int stm32_adc_suspend(struct device *dev)
 {
-	struct stm32_adc *adc = dev_get_drvdata(dev);
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 
 	if (iio_buffer_enabled(indio_dev))
-		__stm32_adc_buffer_predisable(indio_dev);
+		stm32_adc_buffer_predisable(indio_dev);
 
 	return pm_runtime_force_suspend(dev);
 }
 
 static int stm32_adc_resume(struct device *dev)
 {
-	struct stm32_adc *adc = dev_get_drvdata(dev);
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	int ret;
 
 	ret = pm_runtime_force_resume(dev);
@@ -2039,7 +2020,7 @@ static int stm32_adc_resume(struct device *dev)
 	if (ret < 0)
 		return ret;
 
-	return __stm32_adc_buffer_postenable(indio_dev);
+	return stm32_adc_buffer_postenable(indio_dev);
 }
 #endif
 
diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c
index 506bf519f64c..5e10fb4f3704 100644
--- a/drivers/iio/adc/stm32-dfsdm-adc.c
+++ b/drivers/iio/adc/stm32-dfsdm-adc.c
@@ -330,9 +330,9 @@ static int stm32_dfsdm_compute_all_osrs(struct iio_dev *indio_dev,
 	return 0;
 }
 
-static int stm32_dfsdm_start_channel(struct stm32_dfsdm_adc *adc)
+static int stm32_dfsdm_start_channel(struct iio_dev *indio_dev)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 	struct regmap *regmap = adc->dfsdm->regmap;
 	const struct iio_chan_spec *chan;
 	unsigned int bit;
@@ -350,9 +350,9 @@ static int stm32_dfsdm_start_channel(struct stm32_dfsdm_adc *adc)
 	return 0;
 }
 
-static void stm32_dfsdm_stop_channel(struct stm32_dfsdm_adc *adc)
+static void stm32_dfsdm_stop_channel(struct iio_dev *indio_dev)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 	struct regmap *regmap = adc->dfsdm->regmap;
 	const struct iio_chan_spec *chan;
 	unsigned int bit;
@@ -418,11 +418,11 @@ static void stm32_dfsdm_stop_filter(struct stm32_dfsdm *dfsdm,
 			   DFSDM_CR1_DFEN_MASK, DFSDM_CR1_DFEN(0));
 }
 
-static int stm32_dfsdm_filter_set_trig(struct stm32_dfsdm_adc *adc,
+static int stm32_dfsdm_filter_set_trig(struct iio_dev *indio_dev,
 				       unsigned int fl_id,
 				       struct iio_trigger *trig)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 	struct regmap *regmap = adc->dfsdm->regmap;
 	u32 jextsel = 0, jexten = STM32_DFSDM_JEXTEN_DISABLED;
 	int ret;
@@ -447,11 +447,11 @@ static int stm32_dfsdm_filter_set_trig(struct stm32_dfsdm_adc *adc,
 	return 0;
 }
 
-static int stm32_dfsdm_channels_configure(struct stm32_dfsdm_adc *adc,
+static int stm32_dfsdm_channels_configure(struct iio_dev *indio_dev,
 					  unsigned int fl_id,
 					  struct iio_trigger *trig)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 	struct regmap *regmap = adc->dfsdm->regmap;
 	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[fl_id];
 	struct stm32_dfsdm_filter_osr *flo = &fl->flo[0];
@@ -491,11 +491,11 @@ static int stm32_dfsdm_channels_configure(struct stm32_dfsdm_adc *adc,
 	return 0;
 }
 
-static int stm32_dfsdm_filter_configure(struct stm32_dfsdm_adc *adc,
+static int stm32_dfsdm_filter_configure(struct iio_dev *indio_dev,
 					unsigned int fl_id,
 					struct iio_trigger *trig)
 {
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 	struct regmap *regmap = adc->dfsdm->regmap;
 	struct stm32_dfsdm_filter *fl = &adc->dfsdm->fl_list[fl_id];
 	struct stm32_dfsdm_filter_osr *flo = &fl->flo[fl->fast];
@@ -521,7 +521,7 @@ static int stm32_dfsdm_filter_configure(struct stm32_dfsdm_adc *adc,
 	if (ret)
 		return ret;
 
-	ret = stm32_dfsdm_filter_set_trig(adc, fl_id, trig);
+	ret = stm32_dfsdm_filter_set_trig(indio_dev, fl_id, trig);
 	if (ret)
 		return ret;
 
@@ -729,21 +729,22 @@ static ssize_t dfsdm_adc_audio_set_spiclk(struct iio_dev *indio_dev,
 	return len;
 }
 
-static int stm32_dfsdm_start_conv(struct stm32_dfsdm_adc *adc,
+static int stm32_dfsdm_start_conv(struct iio_dev *indio_dev,
 				  struct iio_trigger *trig)
 {
+	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 	struct regmap *regmap = adc->dfsdm->regmap;
 	int ret;
 
-	ret = stm32_dfsdm_channels_configure(adc, adc->fl_id, trig);
+	ret = stm32_dfsdm_channels_configure(indio_dev, adc->fl_id, trig);
 	if (ret < 0)
 		return ret;
 
-	ret = stm32_dfsdm_start_channel(adc);
+	ret = stm32_dfsdm_start_channel(indio_dev);
 	if (ret < 0)
 		return ret;
 
-	ret = stm32_dfsdm_filter_configure(adc, adc->fl_id, trig);
+	ret = stm32_dfsdm_filter_configure(indio_dev, adc->fl_id, trig);
 	if (ret < 0)
 		goto stop_channels;
 
@@ -757,13 +758,14 @@ filter_unconfigure:
 	regmap_update_bits(regmap, DFSDM_CR1(adc->fl_id),
 			   DFSDM_CR1_CFG_MASK, 0);
 stop_channels:
-	stm32_dfsdm_stop_channel(adc);
+	stm32_dfsdm_stop_channel(indio_dev);
 
 	return ret;
 }
 
-static void stm32_dfsdm_stop_conv(struct stm32_dfsdm_adc *adc)
+static void stm32_dfsdm_stop_conv(struct iio_dev *indio_dev)
 {
+	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 	struct regmap *regmap = adc->dfsdm->regmap;
 
 	stm32_dfsdm_stop_filter(adc->dfsdm, adc->fl_id);
@@ -771,7 +773,7 @@ static void stm32_dfsdm_stop_conv(struct stm32_dfsdm_adc *adc)
 	regmap_update_bits(regmap, DFSDM_CR1(adc->fl_id),
 			   DFSDM_CR1_CFG_MASK, 0);
 
-	stm32_dfsdm_stop_channel(adc);
+	stm32_dfsdm_stop_channel(indio_dev);
 }
 
 static int stm32_dfsdm_set_watermark(struct iio_dev *indio_dev,
@@ -993,7 +995,7 @@ static int stm32_dfsdm_update_scan_mode(struct iio_dev *indio_dev,
 	return 0;
 }
 
-static int __stm32_dfsdm_postenable(struct iio_dev *indio_dev)
+static int stm32_dfsdm_postenable(struct iio_dev *indio_dev)
 {
 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 	int ret;
@@ -1017,7 +1019,7 @@ static int __stm32_dfsdm_postenable(struct iio_dev *indio_dev)
 		goto stop_dfsdm;
 	}
 
-	ret = stm32_dfsdm_start_conv(adc, indio_dev->trig);
+	ret = stm32_dfsdm_start_conv(indio_dev, indio_dev->trig);
 	if (ret) {
 		dev_err(&indio_dev->dev, "Can't start conversion\n");
 		goto err_stop_dma;
@@ -1036,34 +1038,11 @@ err_stop_hwc:
 	return ret;
 }
 
-static int stm32_dfsdm_postenable(struct iio_dev *indio_dev)
-{
-	int ret;
-
-	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
-		ret = iio_triggered_buffer_postenable(indio_dev);
-		if (ret < 0)
-			return ret;
-	}
-
-	ret = __stm32_dfsdm_postenable(indio_dev);
-	if (ret < 0)
-		goto err_predisable;
-
-	return 0;
-
-err_predisable:
-	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
-		iio_triggered_buffer_predisable(indio_dev);
-
-	return ret;
-}
-
-static void __stm32_dfsdm_predisable(struct iio_dev *indio_dev)
+static int stm32_dfsdm_predisable(struct iio_dev *indio_dev)
 {
 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 
-	stm32_dfsdm_stop_conv(adc);
+	stm32_dfsdm_stop_conv(indio_dev);
 
 	stm32_dfsdm_adc_dma_stop(indio_dev);
 
@@ -1071,14 +1050,6 @@ static void __stm32_dfsdm_predisable(struct iio_dev *indio_dev)
 
 	if (adc->hwc)
 		iio_hw_consumer_disable(adc->hwc);
-}
-
-static int stm32_dfsdm_predisable(struct iio_dev *indio_dev)
-{
-	__stm32_dfsdm_predisable(indio_dev);
-
-	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
-		iio_triggered_buffer_predisable(indio_dev);
 
 	return 0;
 }
@@ -1159,7 +1130,7 @@ static int stm32_dfsdm_single_conv(struct iio_dev *indio_dev,
 
 	adc->nconv = 1;
 	adc->smask = BIT(chan->scan_index);
-	ret = stm32_dfsdm_start_conv(adc, NULL);
+	ret = stm32_dfsdm_start_conv(indio_dev, NULL);
 	if (ret < 0) {
 		regmap_update_bits(adc->dfsdm->regmap, DFSDM_CR2(adc->fl_id),
 				   DFSDM_CR2_REOCIE_MASK, DFSDM_CR2_REOCIE(0));
@@ -1180,7 +1151,7 @@ static int stm32_dfsdm_single_conv(struct iio_dev *indio_dev,
 	else
 		ret = IIO_VAL_INT;
 
-	stm32_dfsdm_stop_conv(adc);
+	stm32_dfsdm_stop_conv(indio_dev);
 
 	stm32_dfsdm_process_data(adc, res);
 
@@ -1313,8 +1284,8 @@ static const struct iio_info stm32_dfsdm_info_adc = {
 
 static irqreturn_t stm32_dfsdm_irq(int irq, void *arg)
 {
-	struct stm32_dfsdm_adc *adc = arg;
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct iio_dev *indio_dev = arg;
+	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 	struct regmap *regmap = adc->dfsdm->regmap;
 	unsigned int status, int_en;
 
@@ -1571,11 +1542,10 @@ static int stm32_dfsdm_adc_probe(struct platform_device *pdev)
 	adc = iio_priv(iio);
 	adc->dfsdm = dev_get_drvdata(dev->parent);
 
-	iio->dev.parent = dev;
 	iio->dev.of_node = np;
 	iio->modes = INDIO_DIRECT_MODE;
 
-	platform_set_drvdata(pdev, adc);
+	platform_set_drvdata(pdev, iio);
 
 	ret = of_property_read_u32(dev->of_node, "reg", &adc->fl_id);
 	if (ret != 0 || adc->fl_id >= adc->dfsdm->num_fls) {
@@ -1604,7 +1574,7 @@ static int stm32_dfsdm_adc_probe(struct platform_device *pdev)
 		return irq;
 
 	ret = devm_request_irq(dev, irq, stm32_dfsdm_irq,
-			       0, pdev->name, adc);
+			       0, pdev->name, iio);
 	if (ret < 0) {
 		dev_err(dev, "Failed to request IRQ\n");
 		return ret;
@@ -1651,8 +1621,8 @@ err_cleanup:
 
 static int stm32_dfsdm_adc_remove(struct platform_device *pdev)
 {
-	struct stm32_dfsdm_adc *adc = platform_get_drvdata(pdev);
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 
 	if (adc->dev_data->type == DFSDM_AUDIO)
 		of_platform_depopulate(&pdev->dev);
@@ -1664,19 +1634,18 @@ static int stm32_dfsdm_adc_remove(struct platform_device *pdev)
 
 static int __maybe_unused stm32_dfsdm_adc_suspend(struct device *dev)
 {
-	struct stm32_dfsdm_adc *adc = dev_get_drvdata(dev);
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 
 	if (iio_buffer_enabled(indio_dev))
-		__stm32_dfsdm_predisable(indio_dev);
+		stm32_dfsdm_predisable(indio_dev);
 
 	return 0;
 }
 
 static int __maybe_unused stm32_dfsdm_adc_resume(struct device *dev)
 {
-	struct stm32_dfsdm_adc *adc = dev_get_drvdata(dev);
-	struct iio_dev *indio_dev = iio_priv_to_dev(adc);
+	struct iio_dev *indio_dev = dev_get_drvdata(dev);
+	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 	const struct iio_chan_spec *chan;
 	struct stm32_dfsdm_channel *ch;
 	int i, ret;
@@ -1691,7 +1660,7 @@ static int __maybe_unused stm32_dfsdm_adc_resume(struct device *dev)
 	}
 
 	if (iio_buffer_enabled(indio_dev))
-		__stm32_dfsdm_postenable(indio_dev);
+		stm32_dfsdm_postenable(indio_dev);
 
 	return 0;
 }
diff --git a/drivers/iio/adc/stmpe-adc.c b/drivers/iio/adc/stmpe-adc.c
index 0f88048ea48f..fba659bfdb40 100644
--- a/drivers/iio/adc/stmpe-adc.c
+++ b/drivers/iio/adc/stmpe-adc.c
@@ -297,7 +297,6 @@ static int stmpe_adc_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, indio_dev);
 
 	indio_dev->name		= dev_name(&pdev->dev);
-	indio_dev->dev.parent	= &pdev->dev;
 	indio_dev->info		= &stmpe_adc_iio_info;
 	indio_dev->modes	= INDIO_DIRECT_MODE;
 
diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c
index f87bbc711ccc..55bd2dc514e9 100644
--- a/drivers/iio/adc/stx104.c
+++ b/drivers/iio/adc/stx104.c
@@ -319,7 +319,6 @@ static int stx104_probe(struct device *dev, unsigned int id)
 	}
 
 	indio_dev->name = dev_name(dev);
-	indio_dev->dev.parent = dev;
 
 	priv = iio_priv(indio_dev);
 	priv->base = base[id];
diff --git a/drivers/iio/adc/sun4i-gpadc-iio.c b/drivers/iio/adc/sun4i-gpadc-iio.c
index 0f2c1738a90d..99b43f28e879 100644
--- a/drivers/iio/adc/sun4i-gpadc-iio.c
+++ b/drivers/iio/adc/sun4i-gpadc-iio.c
@@ -619,8 +619,6 @@ static int sun4i_gpadc_probe(struct platform_device *pdev)
 	info->indio_dev = indio_dev;
 	init_completion(&info->completion);
 	indio_dev->name = dev_name(&pdev->dev);
-	indio_dev->dev.parent = &pdev->dev;
-	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->info = &sun4i_gpadc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
diff --git a/drivers/iio/adc/ti-adc081c.c b/drivers/iio/adc/ti-adc081c.c
index 0235863ff77b..9426f70a8005 100644
--- a/drivers/iio/adc/ti-adc081c.c
+++ b/drivers/iio/adc/ti-adc081c.c
@@ -6,9 +6,9 @@
  * Copyright (C) 2016 Intel
  *
  * Datasheets:
- *	http://www.ti.com/lit/ds/symlink/adc081c021.pdf
- *	http://www.ti.com/lit/ds/symlink/adc101c021.pdf
- *	http://www.ti.com/lit/ds/symlink/adc121c021.pdf
+ *	https://www.ti.com/lit/ds/symlink/adc081c021.pdf
+ *	https://www.ti.com/lit/ds/symlink/adc101c021.pdf
+ *	https://www.ti.com/lit/ds/symlink/adc121c021.pdf
  *
  * The devices have a very similar interface and differ mostly in the number of
  * bits handled. For the 8-bit and 10-bit models the least-significant 4 or 2
@@ -18,7 +18,7 @@
 #include <linux/err.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
-#include <linux/of.h>
+#include <linux/mod_devicetable.h>
 #include <linux/acpi.h>
 
 #include <linux/iio/iio.h>
@@ -181,8 +181,6 @@ static int adc081c_probe(struct i2c_client *client,
 	if (err < 0)
 		return err;
 
-	iio->dev.parent = &client->dev;
-	iio->dev.of_node = client->dev.of_node;
 	iio->name = dev_name(&client->dev);
 	iio->modes = INDIO_DIRECT_MODE;
 	iio->info = &adc081c_info;
@@ -232,7 +230,6 @@ static const struct i2c_device_id adc081c_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, adc081c_id);
 
-#ifdef CONFIG_OF
 static const struct of_device_id adc081c_of_match[] = {
 	{ .compatible = "ti,adc081c" },
 	{ .compatible = "ti,adc101c" },
@@ -240,7 +237,6 @@ static const struct of_device_id adc081c_of_match[] = {
 	{ }
 };
 MODULE_DEVICE_TABLE(of, adc081c_of_match);
-#endif
 
 #ifdef CONFIG_ACPI
 static const struct acpi_device_id adc081c_acpi_match[] = {
@@ -255,7 +251,7 @@ MODULE_DEVICE_TABLE(acpi, adc081c_acpi_match);
 static struct i2c_driver adc081c_driver = {
 	.driver = {
 		.name = "adc081c",
-		.of_match_table = of_match_ptr(adc081c_of_match),
+		.of_match_table = adc081c_of_match,
 		.acpi_match_table = ACPI_PTR(adc081c_acpi_match),
 	},
 	.probe = adc081c_probe,
diff --git a/drivers/iio/adc/ti-adc0832.c b/drivers/iio/adc/ti-adc0832.c
index 6ea39f4bbb37..c7a085dce1f4 100644
--- a/drivers/iio/adc/ti-adc0832.c
+++ b/drivers/iio/adc/ti-adc0832.c
@@ -4,10 +4,11 @@
  *
  * Copyright (c) 2016 Akinobu Mita <akinobu.mita@gmail.com>
  *
- * Datasheet: http://www.ti.com/lit/ds/symlink/adc0832-n.pdf
+ * Datasheet: https://www.ti.com/lit/ds/symlink/adc0832-n.pdf
  */
 
 #include <linux/module.h>
+#include <linux/mod_devicetable.h>
 #include <linux/spi/spi.h>
 #include <linux/iio/iio.h>
 #include <linux/regulator/consumer.h>
@@ -245,8 +246,6 @@ static int adc0832_probe(struct spi_device *spi)
 	mutex_init(&adc->lock);
 
 	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->info = &adc0832_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
@@ -315,8 +314,6 @@ static int adc0832_remove(struct spi_device *spi)
 	return 0;
 }
 
-#ifdef CONFIG_OF
-
 static const struct of_device_id adc0832_dt_ids[] = {
 	{ .compatible = "ti,adc0831", },
 	{ .compatible = "ti,adc0832", },
@@ -326,8 +323,6 @@ static const struct of_device_id adc0832_dt_ids[] = {
 };
 MODULE_DEVICE_TABLE(of, adc0832_dt_ids);
 
-#endif
-
 static const struct spi_device_id adc0832_id[] = {
 	{ "adc0831", adc0831 },
 	{ "adc0832", adc0832 },
@@ -340,7 +335,7 @@ MODULE_DEVICE_TABLE(spi, adc0832_id);
 static struct spi_driver adc0832_driver = {
 	.driver = {
 		.name = "adc0832",
-		.of_match_table = of_match_ptr(adc0832_dt_ids),
+		.of_match_table = adc0832_dt_ids,
 	},
 	.probe = adc0832_probe,
 	.remove = adc0832_remove,
diff --git a/drivers/iio/adc/ti-adc084s021.c b/drivers/iio/adc/ti-adc084s021.c
index bdedf456ee05..9017e1e24273 100644
--- a/drivers/iio/adc/ti-adc084s021.c
+++ b/drivers/iio/adc/ti-adc084s021.c
@@ -4,12 +4,13 @@
  *
  * Driver for Texas Instruments' ADC084S021 ADC chip.
  * Datasheets can be found here:
- * http://www.ti.com/lit/ds/symlink/adc084s021.pdf
+ * https://www.ti.com/lit/ds/symlink/adc084s021.pdf
  */
 
 #include <linux/err.h>
 #include <linux/spi/spi.h>
 #include <linux/module.h>
+#include <linux/mod_devicetable.h>
 #include <linux/interrupt.h>
 #include <linux/iio/iio.h>
 #include <linux/iio/buffer.h>
@@ -187,8 +188,6 @@ static const struct iio_info adc084s021_info = {
 
 static const struct iio_buffer_setup_ops adc084s021_buffer_setup_ops = {
 	.preenable = adc084s021_buffer_preenable,
-	.postenable = iio_triggered_buffer_postenable,
-	.predisable = iio_triggered_buffer_predisable,
 	.postdisable = adc084s021_buffer_postdisable,
 };
 
@@ -211,8 +210,6 @@ static int adc084s021_probe(struct spi_device *spi)
 	spi_set_drvdata(spi, indio_dev);
 
 	/* Initiate the Industrial I/O device */
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &adc084s021_info;
@@ -258,7 +255,7 @@ MODULE_DEVICE_TABLE(spi, adc084s021_id);
 static struct spi_driver adc084s021_driver = {
 	.driver = {
 		.name = ADC084S021_DRIVER_NAME,
-		.of_match_table = of_match_ptr(adc084s021_of_match),
+		.of_match_table = adc084s021_of_match,
 	},
 	.probe = adc084s021_probe,
 	.id_table = adc084s021_id,
diff --git a/drivers/iio/adc/ti-adc108s102.c b/drivers/iio/adc/ti-adc108s102.c
index de9aaebff862..9b9b27415c93 100644
--- a/drivers/iio/adc/ti-adc108s102.c
+++ b/drivers/iio/adc/ti-adc108s102.c
@@ -252,7 +252,6 @@ static int adc108s102_probe(struct spi_device *spi)
 	st->spi = spi;
 
 	indio_dev->name = spi->modalias;
-	indio_dev->dev.parent = &spi->dev;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = adc108s102_channels;
 	indio_dev->num_channels = ARRAY_SIZE(adc108s102_channels);
diff --git a/drivers/iio/adc/ti-adc12138.c b/drivers/iio/adc/ti-adc12138.c
index 68a9dcb8faa2..e485719cd2c4 100644
--- a/drivers/iio/adc/ti-adc12138.c
+++ b/drivers/iio/adc/ti-adc12138.c
@@ -407,7 +407,6 @@ static int adc12138_probe(struct spi_device *spi)
 	init_completion(&adc->complete);
 
 	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->dev.parent = &spi->dev;
 	indio_dev->info = &adc12138_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
diff --git a/drivers/iio/adc/ti-adc128s052.c b/drivers/iio/adc/ti-adc128s052.c
index 1e5a936b5b6a..e86f55ce093f 100644
--- a/drivers/iio/adc/ti-adc128s052.c
+++ b/drivers/iio/adc/ti-adc128s052.c
@@ -4,9 +4,9 @@
  *
  * Driver for Texas Instruments' ADC128S052, ADC122S021 and ADC124S021 ADC chip.
  * Datasheets can be found here:
- * http://www.ti.com/lit/ds/symlink/adc128s052.pdf
- * http://www.ti.com/lit/ds/symlink/adc122s021.pdf
- * http://www.ti.com/lit/ds/symlink/adc124s021.pdf
+ * https://www.ti.com/lit/ds/symlink/adc128s052.pdf
+ * https://www.ti.com/lit/ds/symlink/adc122s021.pdf
+ * https://www.ti.com/lit/ds/symlink/adc124s021.pdf
  */
 
 #include <linux/acpi.h>
@@ -152,8 +152,6 @@ static int adc128_probe(struct spi_device *spi)
 
 	spi_set_drvdata(spi, indio_dev);
 
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = spi_get_device_id(spi)->name;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &adc128_info;
diff --git a/drivers/iio/adc/ti-adc161s626.c b/drivers/iio/adc/ti-adc161s626.c
index 3bbc9b9ddbfe..607791ffe7f0 100644
--- a/drivers/iio/adc/ti-adc161s626.c
+++ b/drivers/iio/adc/ti-adc161s626.c
@@ -11,6 +11,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/mod_devicetable.h>
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/spi/spi.h>
@@ -179,8 +180,6 @@ static int ti_adc_probe(struct spi_device *spi)
 		return -ENOMEM;
 
 	indio_dev->info = &ti_adc_info;
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->name = TI_ADC_DRV_NAME;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	spi_set_drvdata(spi, indio_dev);
@@ -259,7 +258,7 @@ MODULE_DEVICE_TABLE(spi, ti_adc_id);
 static struct spi_driver ti_adc_driver = {
 	.driver = {
 		.name	= TI_ADC_DRV_NAME,
-		.of_match_table = of_match_ptr(ti_adc_dt_ids),
+		.of_match_table = ti_adc_dt_ids,
 	},
 	.probe		= ti_adc_probe,
 	.remove		= ti_adc_remove,
diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c
index 5ea4f45d6bad..f42ab112986e 100644
--- a/drivers/iio/adc/ti-ads1015.c
+++ b/drivers/iio/adc/ti-ads1015.c
@@ -788,8 +788,6 @@ static int ads1015_buffer_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops ads1015_buffer_setup_ops = {
 	.preenable	= ads1015_buffer_preenable,
-	.postenable	= iio_triggered_buffer_postenable,
-	.predisable	= iio_triggered_buffer_predisable,
 	.postdisable	= ads1015_buffer_postdisable,
 	.validate_scan_mask = &iio_validate_scan_mask_onehot,
 };
@@ -939,8 +937,6 @@ static int ads1015_probe(struct i2c_client *client,
 
 	mutex_init(&data->lock);
 
-	indio_dev->dev.parent = &client->dev;
-	indio_dev->dev.of_node = client->dev.of_node;
 	indio_dev->name = ADS1015_DRV_NAME;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
diff --git a/drivers/iio/adc/ti-ads124s08.c b/drivers/iio/adc/ti-ads124s08.c
index f1ee3b1e2827..4b4fbe33930c 100644
--- a/drivers/iio/adc/ti-ads124s08.c
+++ b/drivers/iio/adc/ti-ads124s08.c
@@ -1,6 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 /* TI ADS124S0X chip family driver
- * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
+ * Copyright (C) 2018 Texas Instruments Incorporated - https://www.ti.com/
  */
 
 #include <linux/err.h>
@@ -325,8 +325,6 @@ static int ads124s_probe(struct spi_device *spi)
 	ads124s_priv->spi = spi;
 
 	indio_dev->name = spi_id->name;
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = ads124s_priv->chip_info->channels;
 	indio_dev->num_channels = ads124s_priv->chip_info->num_channels;
diff --git a/drivers/iio/adc/ti-ads7950.c b/drivers/iio/adc/ti-ads7950.c
index f9edc1207f75..2383eacada87 100644
--- a/drivers/iio/adc/ti-ads7950.c
+++ b/drivers/iio/adc/ti-ads7950.c
@@ -9,7 +9,7 @@
  * Copyright 2012 CS Systemes d'Information
  *
  * And also on hwmon/ads79xx.c
- * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
+ * Copyright (C) 2013 Texas Instruments Incorporated - https://www.ti.com/
  *	Nishanth Menon
  */
 
@@ -557,7 +557,6 @@ static int ti_ads7950_probe(struct spi_device *spi)
 	info = &ti_ads7950_chip_info[spi_get_device_id(spi)->driver_data];
 
 	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->dev.parent = &spi->dev;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = info->channels;
 	indio_dev->num_channels = info->num_channels;
diff --git a/drivers/iio/adc/ti-ads8344.c b/drivers/iio/adc/ti-ads8344.c
index 8a8792010c20..a345a30d74fa 100644
--- a/drivers/iio/adc/ti-ads8344.c
+++ b/drivers/iio/adc/ti-ads8344.c
@@ -4,7 +4,7 @@
  *
  * Author: Gregory CLEMENT <gregory.clement@bootlin.com>
  *
- * Datasheet: http://www.ti.com/lit/ds/symlink/ads8344.pdf
+ * Datasheet: https://www.ti.com/lit/ds/symlink/ads8344.pdf
  */
 
 #include <linux/delay.h>
@@ -148,8 +148,6 @@ static int ads8344_probe(struct spi_device *spi)
 	mutex_init(&adc->lock);
 
 	indio_dev->name = dev_name(&spi->dev);
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->info = &ads8344_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = ads8344_channels;
diff --git a/drivers/iio/adc/ti-ads8688.c b/drivers/iio/adc/ti-ads8688.c
index 14fe7c320b52..16bcb37eebb7 100644
--- a/drivers/iio/adc/ti-ads8688.c
+++ b/drivers/iio/adc/ti-ads8688.c
@@ -449,8 +449,6 @@ static int ads8688_probe(struct spi_device *spi)
 	st->spi = spi;
 
 	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->dev.parent = &spi->dev;
-	indio_dev->dev.of_node = spi->dev.of_node;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = st->chip_info->channels;
 	indio_dev->num_channels = st->chip_info->num_channels;
diff --git a/drivers/iio/adc/ti-tlc4541.c b/drivers/iio/adc/ti-tlc4541.c
index 77620359b54c..403b787f9f7e 100644
--- a/drivers/iio/adc/ti-tlc4541.c
+++ b/drivers/iio/adc/ti-tlc4541.c
@@ -5,8 +5,8 @@
  * Copyright (C) 2017 Phil Reid
  *
  * Datasheets can be found here:
- * http://www.ti.com/lit/gpn/tlc3541
- * http://www.ti.com/lit/gpn/tlc4541
+ * https://www.ti.com/lit/gpn/tlc3541
+ * https://www.ti.com/lit/gpn/tlc4541
  *
  * The tlc4541 requires 24 clock cycles to start a transfer.
  * Conversion then takes 2.94us to complete before data is ready
@@ -24,6 +24,7 @@
 #include <linux/iio/triggered_buffer.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/mod_devicetable.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
 #include <linux/spi/spi.h>
@@ -177,7 +178,6 @@ static int tlc4541_probe(struct spi_device *spi)
 	info = &tlc4541_chip_info[spi_get_device_id(spi)->driver_data];
 
 	indio_dev->name = spi_get_device_id(spi)->name;
-	indio_dev->dev.parent = &spi->dev;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = info->channels;
 	indio_dev->num_channels = info->num_channels;
@@ -236,14 +236,12 @@ static int tlc4541_remove(struct spi_device *spi)
 	return 0;
 }
 
-#ifdef CONFIG_OF
 static const struct of_device_id tlc4541_dt_ids[] = {
 	{ .compatible = "ti,tlc3541", },
 	{ .compatible = "ti,tlc4541", },
 	{}
 };
 MODULE_DEVICE_TABLE(of, tlc4541_dt_ids);
-#endif
 
 static const struct spi_device_id tlc4541_id[] = {
 	{"tlc3541", TLC3541},
@@ -255,7 +253,7 @@ MODULE_DEVICE_TABLE(spi, tlc4541_id);
 static struct spi_driver tlc4541_driver = {
 	.driver = {
 		.name   = "tlc4541",
-		.of_match_table = of_match_ptr(tlc4541_dt_ids),
+		.of_match_table = tlc4541_dt_ids,
 	},
 	.probe          = tlc4541_probe,
 	.remove         = tlc4541_remove,
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 9d984f2a8ba7..b11c8c47ba2a 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -1,7 +1,7 @@
 /*
  * TI ADC MFD driver
  *
- * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
+ * Copyright (C) 2012 Texas Instruments Incorporated - https://www.ti.com/
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
@@ -294,7 +294,7 @@ static int tiadc_start_dma(struct iio_dev *indio_dev)
 static int tiadc_buffer_preenable(struct iio_dev *indio_dev)
 {
 	struct tiadc_device *adc_dev = iio_priv(indio_dev);
-	int i, fifo1count, read;
+	int i, fifo1count;
 
 	tiadc_writel(adc_dev, REG_IRQCLR, (IRQENB_FIFO1THRES |
 				IRQENB_FIFO1OVRRUN |
@@ -303,7 +303,7 @@ static int tiadc_buffer_preenable(struct iio_dev *indio_dev)
 	/* Flush FIFO. Needed in corner cases in simultaneous tsc/adc use */
 	fifo1count = tiadc_readl(adc_dev, REG_FIFO1CNT);
 	for (i = 0; i < fifo1count; i++)
-		read = tiadc_readl(adc_dev, REG_FIFO1);
+		tiadc_readl(adc_dev, REG_FIFO1);
 
 	return 0;
 }
@@ -343,7 +343,7 @@ static int tiadc_buffer_predisable(struct iio_dev *indio_dev)
 {
 	struct tiadc_device *adc_dev = iio_priv(indio_dev);
 	struct tiadc_dma *dma = &adc_dev->dma;
-	int fifo1count, i, read;
+	int fifo1count, i;
 
 	tiadc_writel(adc_dev, REG_IRQCLR, (IRQENB_FIFO1THRES |
 				IRQENB_FIFO1OVRRUN | IRQENB_FIFO1UNDRFLW));
@@ -358,7 +358,7 @@ static int tiadc_buffer_predisable(struct iio_dev *indio_dev)
 	/* Flush FIFO of leftover data in the time it takes to disable adc */
 	fifo1count = tiadc_readl(adc_dev, REG_FIFO1CNT);
 	for (i = 0; i < fifo1count; i++)
-		read = tiadc_readl(adc_dev, REG_FIFO1);
+		tiadc_readl(adc_dev, REG_FIFO1);
 
 	return 0;
 }
@@ -377,7 +377,8 @@ static const struct iio_buffer_setup_ops tiadc_buffer_setup_ops = {
 	.postdisable = &tiadc_buffer_postdisable,
 };
 
-static int tiadc_iio_buffered_hardware_setup(struct iio_dev *indio_dev,
+static int tiadc_iio_buffered_hardware_setup(struct device *dev,
+	struct iio_dev *indio_dev,
 	irqreturn_t (*pollfunc_bh)(int irq, void *p),
 	irqreturn_t (*pollfunc_th)(int irq, void *p),
 	int irq,
@@ -387,13 +388,13 @@ static int tiadc_iio_buffered_hardware_setup(struct iio_dev *indio_dev,
 	struct iio_buffer *buffer;
 	int ret;
 
-	buffer = iio_kfifo_allocate();
+	buffer = devm_iio_kfifo_allocate(dev);
 	if (!buffer)
 		return -ENOMEM;
 
 	iio_device_attach_buffer(indio_dev, buffer);
 
-	ret = request_threaded_irq(irq,	pollfunc_th, pollfunc_bh,
+	ret = devm_request_threaded_irq(dev, irq, pollfunc_th, pollfunc_bh,
 				flags, indio_dev->name, indio_dev);
 	if (ret)
 		goto error_kfifo_free;
@@ -408,15 +409,6 @@ error_kfifo_free:
 	return ret;
 }
 
-static void tiadc_iio_buffered_hardware_remove(struct iio_dev *indio_dev)
-{
-	struct tiadc_device *adc_dev = iio_priv(indio_dev);
-
-	free_irq(adc_dev->mfd_tscadc->irq, indio_dev);
-	iio_kfifo_free(indio_dev->buffer);
-}
-
-
 static const char * const chan_name_ain[] = {
 	"AIN0",
 	"AIN1",
@@ -428,7 +420,8 @@ static const char * const chan_name_ain[] = {
 	"AIN7",
 };
 
-static int tiadc_channel_init(struct iio_dev *indio_dev, int channels)
+static int tiadc_channel_init(struct device *dev, struct iio_dev *indio_dev,
+			      int channels)
 {
 	struct tiadc_device *adc_dev = iio_priv(indio_dev);
 	struct iio_chan_spec *chan_array;
@@ -436,7 +429,8 @@ static int tiadc_channel_init(struct iio_dev *indio_dev, int channels)
 	int i;
 
 	indio_dev->num_channels = channels;
-	chan_array = kcalloc(channels, sizeof(*chan_array), GFP_KERNEL);
+	chan_array = devm_kcalloc(dev, channels, sizeof(*chan_array),
+				  GFP_KERNEL);
 	if (chan_array == NULL)
 		return -ENOMEM;
 
@@ -459,11 +453,6 @@ static int tiadc_channel_init(struct iio_dev *indio_dev, int channels)
 	return 0;
 }
 
-static void tiadc_channels_remove(struct iio_dev *indio_dev)
-{
-	kfree(indio_dev->channels);
-}
-
 static int tiadc_read_raw(struct iio_dev *indio_dev,
 		struct iio_chan_spec const *chan,
 		int *val, int *val2, long mask)
@@ -626,7 +615,6 @@ static int tiadc_probe(struct platform_device *pdev)
 	adc_dev->mfd_tscadc = ti_tscadc_dev_get(pdev);
 	tiadc_parse_dt(pdev, adc_dev);
 
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->name = dev_name(&pdev->dev);
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &tiadc_info;
@@ -635,11 +623,11 @@ static int tiadc_probe(struct platform_device *pdev)
 	tiadc_writel(adc_dev, REG_FIFO1THR, FIFO1_THRESHOLD);
 	mutex_init(&adc_dev->fifo1_lock);
 
-	err = tiadc_channel_init(indio_dev, adc_dev->channels);
+	err = tiadc_channel_init(&pdev->dev, indio_dev, adc_dev->channels);
 	if (err < 0)
 		return err;
 
-	err = tiadc_iio_buffered_hardware_setup(indio_dev,
+	err = tiadc_iio_buffered_hardware_setup(&pdev->dev, indio_dev,
 		&tiadc_worker_h,
 		&tiadc_irq_h,
 		adc_dev->mfd_tscadc->irq,
@@ -664,9 +652,7 @@ static int tiadc_probe(struct platform_device *pdev)
 err_dma:
 	iio_device_unregister(indio_dev);
 err_buffer_unregister:
-	tiadc_iio_buffered_hardware_remove(indio_dev);
 err_free_channels:
-	tiadc_channels_remove(indio_dev);
 	return err;
 }
 
@@ -683,8 +669,6 @@ static int tiadc_remove(struct platform_device *pdev)
 		dma_release_channel(dma->chan);
 	}
 	iio_device_unregister(indio_dev);
-	tiadc_iio_buffered_hardware_remove(indio_dev);
-	tiadc_channels_remove(indio_dev);
 
 	step_en = get_adc_step_mask(adc_dev);
 	am335x_tsc_se_clr(adc_dev->mfd_tscadc, step_en);
diff --git a/drivers/iio/adc/twl4030-madc.c b/drivers/iio/adc/twl4030-madc.c
index 472b08f37fea..6ce40cc4568a 100644
--- a/drivers/iio/adc/twl4030-madc.c
+++ b/drivers/iio/adc/twl4030-madc.c
@@ -5,7 +5,7 @@
  * conversion of analog signals like battery temperature,
  * battery type, battery level etc.
  *
- * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
+ * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/
  * J Keerthy <j-keerthy@ti.com>
  *
  * Based on twl4030-madc.c
@@ -153,7 +153,7 @@ enum sample_type {
  * struct twl4030_madc_data - a container for madc info
  * @dev:		Pointer to device structure for madc
  * @lock:		Mutex protecting this data structure
- * @regulator:		Pointer to bias regulator for madc
+ * @usb3v1:		Pointer to bias regulator for madc
  * @requests:		Array of request struct corresponding to SW1, SW2 and RT
  * @use_second_irq:	IRQ selection (main or co-processor)
  * @imr:		Interrupt mask register of MADC
@@ -161,7 +161,7 @@ enum sample_type {
  */
 struct twl4030_madc_data {
 	struct device *dev;
-	struct mutex lock;	/* mutex protecting this data structure */
+	struct mutex lock;
 	struct regulator *usb3v1;
 	struct twl4030_madc_request requests[TWL4030_MADC_NUM_METHODS];
 	bool use_second_irq;
@@ -472,7 +472,7 @@ static irqreturn_t twl4030_madc_threaded_irq_handler(int irq, void *_madc)
 	struct twl4030_madc_data *madc = _madc;
 	const struct twl4030_madc_conversion_method *method;
 	u8 isr_val, imr_val;
-	int i, len, ret;
+	int i, ret;
 	struct twl4030_madc_request *r;
 
 	mutex_lock(&madc->lock);
@@ -504,8 +504,8 @@ static irqreturn_t twl4030_madc_threaded_irq_handler(int irq, void *_madc)
 			continue;
 		method = &twl4030_conversion_methods[r->method];
 		/* Read results */
-		len = twl4030_madc_read_channels(madc, method->rbase,
-						 r->channels, r->rbuf, r->raw);
+		twl4030_madc_read_channels(madc, method->rbase,
+					   r->channels, r->rbuf, r->raw);
 		/* Free request */
 		r->result_pending = false;
 		r->active = false;
@@ -525,8 +525,8 @@ err_i2c:
 			continue;
 		method = &twl4030_conversion_methods[r->method];
 		/* Read results */
-		len = twl4030_madc_read_channels(madc, method->rbase,
-						 r->channels, r->rbuf, r->raw);
+		twl4030_madc_read_channels(madc, method->rbase,
+					   r->channels, r->rbuf, r->raw);
 		/* Free request */
 		r->result_pending = false;
 		r->active = false;
@@ -772,8 +772,6 @@ static int twl4030_madc_probe(struct platform_device *pdev)
 	madc->dev = &pdev->dev;
 
 	iio_dev->name = dev_name(&pdev->dev);
-	iio_dev->dev.parent = &pdev->dev;
-	iio_dev->dev.of_node = pdev->dev.of_node;
 	iio_dev->info = &twl4030_madc_iio_info;
 	iio_dev->modes = INDIO_DIRECT_MODE;
 	iio_dev->channels = twl4030_madc_iio_channels;
diff --git a/drivers/iio/adc/twl6030-gpadc.c b/drivers/iio/adc/twl6030-gpadc.c
index f24148bd15de..c6416ad795ca 100644
--- a/drivers/iio/adc/twl6030-gpadc.c
+++ b/drivers/iio/adc/twl6030-gpadc.c
@@ -94,9 +94,9 @@ struct twl6030_gpadc_data;
  * struct twl6030_gpadc_platform_data - platform specific data
  * @nchannels:		number of GPADC channels
  * @iio_channels:	iio channels
- * @twl6030_ideal:	pointer to calibration parameters
+ * @ideal:		pointer to calibration parameters
  * @start_conversion:	pointer to ADC start conversion function
- * @channel_to_reg	pointer to ADC function to convert channel to
+ * @channel_to_reg:	pointer to ADC function to convert channel to
  *			register address for reading conversion result
  * @calibrate:		pointer to calibration function
  */
@@ -926,7 +926,6 @@ static int twl6030_gpadc_probe(struct platform_device *pdev)
 	}
 
 	indio_dev->name = DRIVER_NAME;
-	indio_dev->dev.parent = dev;
 	indio_dev->info = &twl6030_gpadc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = pdata->iio_channels;
diff --git a/drivers/iio/adc/vf610_adc.c b/drivers/iio/adc/vf610_adc.c
index cb7380bf07ca..1d794cf3e3f1 100644
--- a/drivers/iio/adc/vf610_adc.c
+++ b/drivers/iio/adc/vf610_adc.c
@@ -724,13 +724,8 @@ static int vf610_adc_buffer_postenable(struct iio_dev *indio_dev)
 {
 	struct vf610_adc *info = iio_priv(indio_dev);
 	unsigned int channel;
-	int ret;
 	int val;
 
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret)
-		return ret;
-
 	val = readl(info->regs + VF610_REG_ADC_GC);
 	val |= VF610_ADC_ADCON;
 	writel(val, info->regs + VF610_REG_ADC_GC);
@@ -761,7 +756,7 @@ static int vf610_adc_buffer_predisable(struct iio_dev *indio_dev)
 
 	writel(hc_cfg, info->regs + VF610_REG_ADC_HC0);
 
-	return iio_triggered_buffer_predisable(indio_dev);
+	return 0;
 }
 
 static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = {
@@ -860,8 +855,6 @@ static int vf610_adc_probe(struct platform_device *pdev)
 	init_completion(&info->completion);
 
 	indio_dev->name = dev_name(&pdev->dev);
-	indio_dev->dev.parent = &pdev->dev;
-	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->info = &vf610_adc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = vf610_adc_iio_channels;
diff --git a/drivers/iio/adc/viperboard_adc.c b/drivers/iio/adc/viperboard_adc.c
index 1d2aeb04069b..1028b101cf56 100644
--- a/drivers/iio/adc/viperboard_adc.c
+++ b/drivers/iio/adc/viperboard_adc.c
@@ -121,7 +121,6 @@ static int vprbrd_adc_probe(struct platform_device *pdev)
 	adc = iio_priv(indio_dev);
 	adc->vb = vb;
 	indio_dev->name = "viperboard adc";
-	indio_dev->dev.parent = &pdev->dev;
 	indio_dev->info = &vprbrd_adc_iio_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = vprbrd_adc_iio_channels;
diff --git a/drivers/iio/adc/xilinx-xadc-core.c b/drivers/iio/adc/xilinx-xadc-core.c
index d7fecab9252e..d0b7ef296afb 100644
--- a/drivers/iio/adc/xilinx-xadc-core.c
+++ b/drivers/iio/adc/xilinx-xadc-core.c
@@ -839,8 +839,6 @@ err:
 
 static const struct iio_buffer_setup_ops xadc_buffer_ops = {
 	.preenable = &xadc_preenable,
-	.postenable = &iio_triggered_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
 	.postdisable = &xadc_postdisable,
 };
 
@@ -1221,8 +1219,6 @@ static int xadc_probe(struct platform_device *pdev)
 	if (IS_ERR(xadc->base))
 		return PTR_ERR(xadc->base);
 
-	indio_dev->dev.parent = &pdev->dev;
-	indio_dev->dev.of_node = pdev->dev.of_node;
 	indio_dev->name = "xadc";
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->info = &xadc_info;