3 files changed, 54 insertions, 3 deletions

diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index 6b87ed410c93..24c70c3cefb4 100644
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -39,6 +39,10 @@ static const unsigned int ad7606_oversampling_avail[7] = {
 	1, 2, 4, 8, 16, 32, 64,
 };
 
+static const unsigned int ad7616_oversampling_avail[8] = {
+	1, 2, 4, 8, 16, 32, 64, 128,
+};
+
 static int ad7606_reset(struct ad7606_state *st)
 {
 	if (st->gpio_reset) {
@@ -220,6 +224,11 @@ static int ad7606_write_raw(struct iio_dev *indio_dev,
 		mutex_lock(&st->lock);
 		gpiod_set_array_value(ARRAY_SIZE(values), st->gpio_os->desc,
 				      st->gpio_os->info, values);
+
+		/* AD7616 requires a reset to update value */
+		if (st->chip_info->os_req_reset)
+			ad7606_reset(st);
+
 		st->oversampling = st->oversampling_avail[i];
 		mutex_unlock(&st->lock);
 
@@ -314,6 +323,36 @@ static const struct iio_chan_spec ad7606_channels[] = {
 	AD7606_CHANNEL(7),
 };
 
+/*
+ * The current assumption that this driver makes for AD7616, is that it's
+ * working in Hardware Mode with Serial, Burst and Sequencer modes activated.
+ * To activate them, following pins must be pulled high:
+ *	-SER/PAR
+ *	-SEQEN
+ * And following pins must be pulled low:
+ *	-WR/BURST
+ *	-DB4/SER1W
+ */
+static const struct iio_chan_spec ad7616_channels[] = {
+	IIO_CHAN_SOFT_TIMESTAMP(16),
+	AD7606_CHANNEL(0),
+	AD7606_CHANNEL(1),
+	AD7606_CHANNEL(2),
+	AD7606_CHANNEL(3),
+	AD7606_CHANNEL(4),
+	AD7606_CHANNEL(5),
+	AD7606_CHANNEL(6),
+	AD7606_CHANNEL(7),
+	AD7606_CHANNEL(8),
+	AD7606_CHANNEL(9),
+	AD7606_CHANNEL(10),
+	AD7606_CHANNEL(11),
+	AD7606_CHANNEL(12),
+	AD7606_CHANNEL(13),
+	AD7606_CHANNEL(14),
+	AD7606_CHANNEL(15),
+};
+
 static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
 	/* More devices added in future */
 	[ID_AD7605_4] = {
@@ -338,6 +377,13 @@ static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
 		.oversampling_avail = ad7606_oversampling_avail,
 		.oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
 	},
+	[ID_AD7616] = {
+		.channels = ad7616_channels,
+		.num_channels = 17,
+		.oversampling_avail = ad7616_oversampling_avail,
+		.oversampling_num = ARRAY_SIZE(ad7616_oversampling_avail),
+		.os_req_reset = true,
+	},
 };
 
 static int ad7606_request_gpios(struct ad7606_state *st)
diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h
index 8c91bd427c4e..f9ef52131e74 100644
--- a/drivers/iio/adc/ad7606.h
+++ b/drivers/iio/adc/ad7606.h
@@ -15,12 +15,14 @@
  * @oversampling_avail	pointer to the array which stores the available
  *			oversampling ratios.
  * @oversampling_num	number of elements stored in oversampling_avail array
+ * @os_req_reset	some devices require a reset to update oversampling
  */
 struct ad7606_chip_info {
 	const struct iio_chan_spec	*channels;
 	unsigned int			num_channels;
 	const unsigned int		*oversampling_avail;
 	unsigned int			oversampling_num;
+	bool				os_req_reset;
 };
 
 /**
@@ -76,9 +78,9 @@ struct ad7606_state {
 	/*
 	 * DMA (thus cache coherency maintenance) requires the
 	 * transfer buffers to live in their own cache lines.
-	 * 8 * 16-bit samples + 64-bit timestamp
+	 * 16 * 16-bit samples + 64-bit timestamp
 	 */
-	unsigned short			data[12] ____cacheline_aligned;
+	unsigned short			data[20] ____cacheline_aligned;
 };
 
 /**
@@ -98,7 +100,8 @@ enum ad7606_supported_device_ids {
 	ID_AD7605_4,
 	ID_AD7606_8,
 	ID_AD7606_6,
-	ID_AD7606_4
+	ID_AD7606_4,
+	ID_AD7616,
 };
 
 #ifdef CONFIG_PM_SLEEP
diff --git a/drivers/iio/adc/ad7606_spi.c b/drivers/iio/adc/ad7606_spi.c
index 4fd0ec36a086..b7faef69a58f 100644
--- a/drivers/iio/adc/ad7606_spi.c
+++ b/drivers/iio/adc/ad7606_spi.c
@@ -53,6 +53,7 @@ static const struct spi_device_id ad7606_id_table[] = {
 	{ "ad7606-4", ID_AD7606_4 },
 	{ "ad7606-6", ID_AD7606_6 },
 	{ "ad7606-8", ID_AD7606_8 },
+	{ "ad7616",   ID_AD7616 },
 	{}
 };
 MODULE_DEVICE_TABLE(spi, ad7606_id_table);
@@ -62,6 +63,7 @@ static const struct of_device_id ad7606_of_match[] = {
 	{ .compatible = "adi,ad7606-4" },
 	{ .compatible = "adi,ad7606-6" },
 	{ .compatible = "adi,ad7606-8" },
+	{ .compatible = "adi,ad7616" },
 	{ },
 };
 MODULE_DEVICE_TABLE(of, ad7606_of_match);