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-rw-r--r--drivers/iio/light/Kconfig34
-rw-r--r--drivers/iio/light/Makefile3
-rw-r--r--drivers/iio/light/acpi-als.c231
-rw-r--r--drivers/iio/light/bh1750.c334
-rw-r--r--drivers/iio/light/hid-sensor-als.c14
-rw-r--r--drivers/iio/light/hid-sensor-prox.c2
-rw-r--r--drivers/iio/light/ltr501.c53
-rw-r--r--drivers/iio/light/stk3310.c722
8 files changed, 1384 insertions, 9 deletions
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index a437bad46686..e6198b7c9cbf 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -5,6 +5,19 @@
menu "Light sensors"
+config ACPI_ALS
+ tristate "ACPI Ambient Light Sensor"
+ depends on ACPI
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select IIO_KFIFO_BUF
+ help
+ Say Y here if you want to build a driver for the ACPI0008
+ Ambient Light Sensor.
+
+ To compile this driver as a module, choose M here: the module will
+ be called acpi-als.
+
config ADJD_S311
tristate "ADJD-S311-CR999 digital color sensor"
select IIO_BUFFER
@@ -37,6 +50,16 @@ config APDS9300
To compile this driver as a module, choose M here: the
module will be called apds9300.
+config BH1750
+ tristate "ROHM BH1750 ambient light sensor"
+ depends on I2C
+ help
+ Say Y here to build support for the ROHM BH1710, BH1715, BH1721,
+ BH1750, BH1751 ambient light sensors.
+
+ To compile this driver as a module, choose M here: the module will
+ be called bh1750.
+
config CM32181
depends on I2C
tristate "CM32181 driver"
@@ -175,6 +198,17 @@ config LTR501
This driver can also be built as a module. If so, the module
will be called ltr501.
+config STK3310
+ tristate "STK3310 ALS and proximity sensor"
+ depends on I2C
+ help
+ Say yes here to get support for the Sensortek STK3310 ambient light
+ and proximity sensor. The STK3311 model is also supported by this
+ driver.
+
+ Choosing M will build the driver as a module. If so, the module
+ will be called stk3310.
+
config TCS3414
tristate "TAOS TCS3414 digital color sensor"
depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index ad7c30fe443b..e2d50fd59c66 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -3,9 +3,11 @@
#
# When adding new entries keep the list in alphabetical order
+obj-$(CONFIG_ACPI_ALS) += acpi-als.o
obj-$(CONFIG_ADJD_S311) += adjd_s311.o
obj-$(CONFIG_AL3320A) += al3320a.o
obj-$(CONFIG_APDS9300) += apds9300.o
+obj-$(CONFIG_BH1750) += bh1750.o
obj-$(CONFIG_CM32181) += cm32181.o
obj-$(CONFIG_CM3232) += cm3232.o
obj-$(CONFIG_CM3323) += cm3323.o
@@ -18,6 +20,7 @@ obj-$(CONFIG_JSA1212) += jsa1212.o
obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o
obj-$(CONFIG_LTR501) += ltr501.o
obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o
+obj-$(CONFIG_STK3310) += stk3310.o
obj-$(CONFIG_TCS3414) += tcs3414.o
obj-$(CONFIG_TCS3472) += tcs3472.o
obj-$(CONFIG_TSL4531) += tsl4531.o
diff --git a/drivers/iio/light/acpi-als.c b/drivers/iio/light/acpi-als.c
new file mode 100644
index 000000000000..1dafa0756bfa
--- /dev/null
+++ b/drivers/iio/light/acpi-als.c
@@ -0,0 +1,231 @@
+/*
+ * ACPI Ambient Light Sensor Driver
+ *
+ * Based on ALS driver:
+ * Copyright (C) 2009 Zhang Rui <rui.zhang@intel.com>
+ *
+ * Rework for IIO subsystem:
+ * Copyright (C) 2012-2013 Martin Liska <marxin.liska@gmail.com>
+ *
+ * Final cleanup and debugging:
+ * Copyright (C) 2013-2014 Marek Vasut <marex@denx.de>
+ * Copyright (C) 2015 Gabriele Mazzotta <gabriele.mzt@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/kfifo_buf.h>
+
+#define ACPI_ALS_CLASS "als"
+#define ACPI_ALS_DEVICE_NAME "acpi-als"
+#define ACPI_ALS_NOTIFY_ILLUMINANCE 0x80
+
+ACPI_MODULE_NAME("acpi-als");
+
+/*
+ * So far, there's only one channel in here, but the specification for
+ * ACPI0008 says there can be more to what the block can report. Like
+ * chromaticity and such. We are ready for incoming additions!
+ */
+static const struct iio_chan_spec acpi_als_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .scan_type = {
+ .sign = 's',
+ .realbits = 32,
+ .storagebits = 32,
+ },
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ },
+};
+
+/*
+ * The event buffer contains timestamp and all the data from
+ * the ACPI0008 block. There are multiple, but so far we only
+ * support _ALI (illuminance). Once someone adds new channels
+ * to acpi_als_channels[], the evt_buffer below will grow
+ * automatically.
+ */
+#define EVT_NR_SOURCES ARRAY_SIZE(acpi_als_channels)
+#define EVT_BUFFER_SIZE \
+ (sizeof(s64) + (EVT_NR_SOURCES * sizeof(s32)))
+
+struct acpi_als {
+ struct acpi_device *device;
+ struct mutex lock;
+
+ s32 evt_buffer[EVT_BUFFER_SIZE];
+};
+
+/*
+ * All types of properties the ACPI0008 block can report. The ALI, ALC, ALT
+ * and ALP can all be handled by als_read_value() below, while the ALR is
+ * special.
+ *
+ * The _ALR property returns tables that can be used to fine-tune the values
+ * reported by the other props based on the particular hardware type and it's
+ * location (it contains tables for "rainy", "bright inhouse lighting" etc.).
+ *
+ * So far, we support only ALI (illuminance).
+ */
+#define ACPI_ALS_ILLUMINANCE "_ALI"
+#define ACPI_ALS_CHROMATICITY "_ALC"
+#define ACPI_ALS_COLOR_TEMP "_ALT"
+#define ACPI_ALS_POLLING "_ALP"
+#define ACPI_ALS_TABLES "_ALR"
+
+static int als_read_value(struct acpi_als *als, char *prop, s32 *val)
+{
+ unsigned long long temp_val;
+ acpi_status status;
+
+ status = acpi_evaluate_integer(als->device->handle, prop, NULL,
+ &temp_val);
+
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status, "Error reading ALS %s", prop));
+ return -EIO;
+ }
+
+ *val = temp_val;
+
+ return 0;
+}
+
+static void acpi_als_notify(struct acpi_device *device, u32 event)
+{
+ struct iio_dev *indio_dev = acpi_driver_data(device);
+ struct acpi_als *als = iio_priv(indio_dev);
+ s32 *buffer = als->evt_buffer;
+ s64 time_ns = iio_get_time_ns();
+ s32 val;
+ int ret;
+
+ mutex_lock(&als->lock);
+
+ memset(buffer, 0, EVT_BUFFER_SIZE);
+
+ switch (event) {
+ case ACPI_ALS_NOTIFY_ILLUMINANCE:
+ ret = als_read_value(als, ACPI_ALS_ILLUMINANCE, &val);
+ if (ret < 0)
+ goto out;
+ *buffer++ = val;
+ break;
+ default:
+ /* Unhandled event */
+ dev_dbg(&device->dev, "Unhandled ACPI ALS event (%08x)!\n",
+ event);
+ goto out;
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, als->evt_buffer, time_ns);
+
+out:
+ mutex_unlock(&als->lock);
+}
+
+static int acpi_als_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ struct acpi_als *als = iio_priv(indio_dev);
+ s32 temp_val;
+ int ret;
+
+ if (mask != IIO_CHAN_INFO_RAW)
+ return -EINVAL;
+
+ /* we support only illumination (_ALI) so far. */
+ if (chan->type != IIO_LIGHT)
+ return -EINVAL;
+
+ ret = als_read_value(als, ACPI_ALS_ILLUMINANCE, &temp_val);
+ if (ret < 0)
+ return ret;
+
+ *val = temp_val;
+
+ return IIO_VAL_INT;
+}
+
+static const struct iio_info acpi_als_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = acpi_als_read_raw,
+};
+
+static int acpi_als_add(struct acpi_device *device)
+{
+ struct acpi_als *als;
+ struct iio_dev *indio_dev;
+ struct iio_buffer *buffer;
+
+ indio_dev = devm_iio_device_alloc(&device->dev, sizeof(*als));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ als = iio_priv(indio_dev);
+
+ device->driver_data = indio_dev;
+ als->device = device;
+ mutex_init(&als->lock);
+
+ indio_dev->name = ACPI_ALS_DEVICE_NAME;
+ indio_dev->dev.parent = &device->dev;
+ indio_dev->info = &acpi_als_info;
+ indio_dev->modes = INDIO_BUFFER_SOFTWARE;
+ indio_dev->channels = acpi_als_channels;
+ indio_dev->num_channels = ARRAY_SIZE(acpi_als_channels);
+
+ buffer = devm_iio_kfifo_allocate(&device->dev);
+ if (!buffer)
+ return -ENOMEM;
+
+ iio_device_attach_buffer(indio_dev, buffer);
+
+ return devm_iio_device_register(&device->dev, indio_dev);
+}
+
+static const struct acpi_device_id acpi_als_device_ids[] = {
+ {"ACPI0008", 0},
+ {},
+};
+
+MODULE_DEVICE_TABLE(acpi, acpi_als_device_ids);
+
+static struct acpi_driver acpi_als_driver = {
+ .name = "acpi_als",
+ .class = ACPI_ALS_CLASS,
+ .ids = acpi_als_device_ids,
+ .ops = {
+ .add = acpi_als_add,
+ .notify = acpi_als_notify,
+ },
+};
+
+module_acpi_driver(acpi_als_driver);
+
+MODULE_AUTHOR("Zhang Rui <rui.zhang@intel.com>");
+MODULE_AUTHOR("Martin Liska <marxin.liska@gmail.com>");
+MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
+MODULE_DESCRIPTION("ACPI Ambient Light Sensor Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/bh1750.c b/drivers/iio/light/bh1750.c
new file mode 100644
index 000000000000..564c2b3c1a83
--- /dev/null
+++ b/drivers/iio/light/bh1750.c
@@ -0,0 +1,334 @@
+/*
+ * ROHM BH1710/BH1715/BH1721/BH1750/BH1751 ambient light sensor driver
+ *
+ * Copyright (c) Tomasz Duszynski <tduszyns@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Data sheets:
+ * http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1710fvc-e.pdf
+ * http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1715fvc-e.pdf
+ * http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1721fvc-e.pdf
+ * http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1750fvi-e.pdf
+ * http://rohmfs.rohm.com/en/products/databook/datasheet/ic/sensor/light/bh1751fvi-e.pdf
+ *
+ * 7-bit I2C slave addresses:
+ * 0x23 (ADDR pin low)
+ * 0x5C (ADDR pin high)
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/module.h>
+
+#define BH1750_POWER_DOWN 0x00
+#define BH1750_ONE_TIME_H_RES_MODE 0x20 /* auto-mode for BH1721 */
+#define BH1750_CHANGE_INT_TIME_H_BIT 0x40
+#define BH1750_CHANGE_INT_TIME_L_BIT 0x60
+
+enum {
+ BH1710,
+ BH1721,
+ BH1750,
+};
+
+struct bh1750_chip_info;
+struct bh1750_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ const struct bh1750_chip_info *chip_info;
+ u16 mtreg;
+};
+
+struct bh1750_chip_info {
+ u16 mtreg_min;
+ u16 mtreg_max;
+ u16 mtreg_default;
+ int mtreg_to_usec;
+ int mtreg_to_scale;
+
+ /*
+ * For BH1710/BH1721 all possible integration time values won't fit
+ * into one page so displaying is limited to every second one.
+ * Note, that user can still write proper values which were not
+ * listed.
+ */
+ int inc;
+
+ u16 int_time_low_mask;
+ u16 int_time_high_mask;
+}
+
+static const bh1750_chip_info_tbl[] = {
+ [BH1710] = { 140, 1022, 300, 400, 250000000, 2, 0x001F, 0x03E0 },
+ [BH1721] = { 140, 1020, 300, 400, 250000000, 2, 0x0010, 0x03E0 },
+ [BH1750] = { 31, 254, 69, 1740, 57500000, 1, 0x001F, 0x00E0 },
+};
+
+static int bh1750_change_int_time(struct bh1750_data *data, int usec)
+{
+ int ret;
+ u16 val;
+ u8 regval;
+ const struct bh1750_chip_info *chip_info = data->chip_info;
+
+ if ((usec % chip_info->mtreg_to_usec) != 0)
+ return -EINVAL;
+
+ val = usec / chip_info->mtreg_to_usec;
+ if (val < chip_info->mtreg_min || val > chip_info->mtreg_max)
+ return -EINVAL;
+
+ ret = i2c_smbus_write_byte(data->client, BH1750_POWER_DOWN);
+ if (ret < 0)
+ return ret;
+
+ regval = (val & chip_info->int_time_high_mask) >> 5;
+ ret = i2c_smbus_write_byte(data->client,
+ BH1750_CHANGE_INT_TIME_H_BIT | regval);
+ if (ret < 0)
+ return ret;
+
+ regval = val & chip_info->int_time_low_mask;
+ ret = i2c_smbus_write_byte(data->client,
+ BH1750_CHANGE_INT_TIME_L_BIT | regval);
+ if (ret < 0)
+ return ret;
+
+ data->mtreg = val;
+
+ return 0;
+}
+
+static int bh1750_read(struct bh1750_data *data, int *val)
+{
+ int ret;
+ __be16 result;
+ const struct bh1750_chip_info *chip_info = data->chip_info;
+ unsigned long delay = chip_info->mtreg_to_usec * data->mtreg;
+
+ /*
+ * BH1721 will enter continuous mode on receiving this command.
+ * Note, that this eliminates need for bh1750_resume().
+ */
+ ret = i2c_smbus_write_byte(data->client, BH1750_ONE_TIME_H_RES_MODE);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(delay + 15000, delay + 40000);
+
+ ret = i2c_master_recv(data->client, (char *)&result, 2);
+ if (ret < 0)
+ return ret;
+
+ *val = be16_to_cpu(result);
+
+ return 0;
+}
+
+static int bh1750_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ int ret, tmp;
+ struct bh1750_data *data = iio_priv(indio_dev);
+ const struct bh1750_chip_info *chip_info = data->chip_info;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ mutex_lock(&data->lock);
+ ret = bh1750_read(data, val);
+ mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ tmp = chip_info->mtreg_to_scale / data->mtreg;
+ *val = tmp / 1000000;
+ *val2 = tmp % 1000000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_INT_TIME:
+ *val = 0;
+ *val2 = chip_info->mtreg_to_usec * data->mtreg;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+}
+
+static int bh1750_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ int ret;
+ struct bh1750_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ if (val != 0)
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+ ret = bh1750_change_int_time(data, val2);
+ mutex_unlock(&data->lock);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static ssize_t bh1750_show_int_time_available(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int i;
+ size_t len = 0;
+ struct bh1750_data *data = iio_priv(dev_to_iio_dev(dev));
+ const struct bh1750_chip_info *chip_info = data->chip_info;
+
+ for (i = chip_info->mtreg_min; i <= chip_info->mtreg_max; i += chip_info->inc)
+ len += scnprintf(buf + len, PAGE_SIZE - len, "0.%06d ",
+ chip_info->mtreg_to_usec * i);
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static IIO_DEV_ATTR_INT_TIME_AVAIL(bh1750_show_int_time_available);
+
+static struct attribute *bh1750_attributes[] = {
+ &iio_dev_attr_integration_time_available.dev_attr.attr,
+ NULL,
+};
+
+static struct attribute_group bh1750_attribute_group = {
+ .attrs = bh1750_attributes,
+};
+
+static const struct iio_info bh1750_info = {
+ .driver_module = THIS_MODULE,
+ .attrs = &bh1750_attribute_group,
+ .read_raw = bh1750_read_raw,
+ .write_raw = bh1750_write_raw,
+};
+
+static const struct iio_chan_spec bh1750_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME)
+ }
+};
+
+static int bh1750_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret, usec;
+ struct bh1750_data *data;
+ struct iio_dev *indio_dev;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C |
+ I2C_FUNC_SMBUS_WRITE_BYTE))
+ return -ENODEV;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ data->chip_info = &bh1750_chip_info_tbl[id->driver_data];
+
+ usec = data->chip_info->mtreg_to_usec * data->chip_info->mtreg_default;
+ ret = bh1750_change_int_time(data, usec);
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&data->lock);
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &bh1750_info;
+ indio_dev->name = id->name;
+ indio_dev->channels = bh1750_channels;
+ indio_dev->num_channels = ARRAY_SIZE(bh1750_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ return iio_device_register(indio_dev);
+}
+
+static int bh1750_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct bh1750_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+
+ mutex_lock(&data->lock);
+ i2c_smbus_write_byte(client, BH1750_POWER_DOWN);
+ mutex_unlock(&data->lock);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int bh1750_suspend(struct device *dev)
+{
+ int ret;
+ struct bh1750_data *data =
+ iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+ /*
+ * This is mainly for BH1721 which doesn't enter power down
+ * mode automatically.
+ */
+ mutex_lock(&data->lock);
+ ret = i2c_smbus_write_byte(data->client, BH1750_POWER_DOWN);
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(bh1750_pm_ops, bh1750_suspend, NULL);
+#define BH1750_PM_OPS (&bh1750_pm_ops)
+#else
+#define BH1750_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id bh1750_id[] = {
+ { "bh1710", BH1710 },
+ { "bh1715", BH1750 },
+ { "bh1721", BH1721 },
+ { "bh1750", BH1750 },
+ { "bh1751", BH1750 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, bh1750_id);
+
+static struct i2c_driver bh1750_driver = {
+ .driver = {
+ .name = "bh1750",
+ .owner = THIS_MODULE,
+ .pm = BH1750_PM_OPS,
+ },
+ .probe = bh1750_probe,
+ .remove = bh1750_remove,
+ .id_table = bh1750_id,
+
+};
+module_i2c_driver(bh1750_driver);
+
+MODULE_AUTHOR("Tomasz Duszynski <tduszyns@gmail.com>");
+MODULE_DESCRIPTION("ROHM BH1710/BH1715/BH1721/BH1750/BH1751 als driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/hid-sensor-als.c b/drivers/iio/light/hid-sensor-als.c
index 1609ecdd01b0..8bb1f90ecd51 100644
--- a/drivers/iio/light/hid-sensor-als.c
+++ b/drivers/iio/light/hid-sensor-als.c
@@ -263,7 +263,6 @@ static int hid_als_probe(struct platform_device *pdev)
struct iio_dev *indio_dev;
struct als_state *als_state;
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
- struct iio_chan_spec *channels;
indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(struct als_state));
if (!indio_dev)
@@ -281,20 +280,21 @@ static int hid_als_probe(struct platform_device *pdev)
return ret;
}
- channels = kmemdup(als_channels, sizeof(als_channels), GFP_KERNEL);
- if (!channels) {
+ indio_dev->channels = kmemdup(als_channels,
+ sizeof(als_channels), GFP_KERNEL);
+ if (!indio_dev->channels) {
dev_err(&pdev->dev, "failed to duplicate channels\n");
return -ENOMEM;
}
- ret = als_parse_report(pdev, hsdev, channels,
- HID_USAGE_SENSOR_ALS, als_state);
+ ret = als_parse_report(pdev, hsdev,
+ (struct iio_chan_spec *)indio_dev->channels,
+ HID_USAGE_SENSOR_ALS, als_state);
if (ret) {
dev_err(&pdev->dev, "failed to setup attributes\n");
goto error_free_dev_mem;
}
- indio_dev->channels = channels;
indio_dev->num_channels =
ARRAY_SIZE(als_channels);
indio_dev->dev.parent = &pdev->dev;
@@ -361,7 +361,7 @@ static int hid_als_remove(struct platform_device *pdev)
return 0;
}
-static struct platform_device_id hid_als_ids[] = {
+static const struct platform_device_id hid_als_ids[] = {
{
/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
.name = "HID-SENSOR-200041",
diff --git a/drivers/iio/light/hid-sensor-prox.c b/drivers/iio/light/hid-sensor-prox.c
index ef60bae738e3..0d248476f4c9 100644
--- a/drivers/iio/light/hid-sensor-prox.c
+++ b/drivers/iio/light/hid-sensor-prox.c
@@ -350,7 +350,7 @@ static int hid_prox_remove(struct platform_device *pdev)
return 0;
}
-static struct platform_device_id hid_prox_ids[] = {
+static const struct platform_device_id hid_prox_ids[] = {
{
/* Format: HID-SENSOR-usage_id_in_hex_lowercase */
.name = "HID-SENSOR-200011",
diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c
index 280eff19b872..1ef7d3773ab9 100644
--- a/drivers/iio/light/ltr501.c
+++ b/drivers/iio/light/ltr501.c
@@ -66,6 +66,9 @@
#define LTR501_REGMAP_NAME "ltr501_regmap"
+#define LTR501_LUX_CONV(vis_coeff, vis_data, ir_coeff, ir_data) \
+ ((vis_coeff * vis_data) - (ir_coeff * ir_data))
+
static const int int_time_mapping[] = {100000, 50000, 200000, 400000};
static const struct reg_field reg_field_it =
@@ -298,6 +301,29 @@ static int ltr501_ps_read_samp_period(struct ltr501_data *data, int *val)
return IIO_VAL_INT;
}
+/* IR and visible spectrum coeff's are given in data sheet */
+static unsigned long ltr501_calculate_lux(u16 vis_data, u16 ir_data)
+{
+ unsigned long ratio, lux;
+
+ if (vis_data == 0)
+ return 0;
+
+ /* multiply numerator by 100 to avoid handling ratio < 1 */
+ ratio = DIV_ROUND_UP(ir_data * 100, ir_data + vis_data);
+
+ if (ratio < 45)
+ lux = LTR501_LUX_CONV(1774, vis_data, -1105, ir_data);
+ else if (ratio >= 45 && ratio < 64)
+ lux = LTR501_LUX_CONV(3772, vis_data, 1336, ir_data);
+ else if (ratio >= 64 && ratio < 85)
+ lux = LTR501_LUX_CONV(1690, vis_data, 169, ir_data);
+ else
+ lux = 0;
+
+ return lux / 1000;
+}
+
static int ltr501_drdy(struct ltr501_data *data, u8 drdy_mask)
{
int tries = 100;
@@ -548,7 +574,14 @@ static const struct iio_event_spec ltr501_pxs_event_spec[] = {
.num_event_specs = _evsize,\
}
+#define LTR501_LIGHT_CHANNEL() { \
+ .type = IIO_LIGHT, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED), \
+ .scan_index = -1, \
+}
+
static const struct iio_chan_spec ltr501_channels[] = {
+ LTR501_LIGHT_CHANNEL(),
LTR501_INTENSITY_CHANNEL(0, LTR501_ALS_DATA0, IIO_MOD_LIGHT_BOTH, 0,
ltr501_als_event_spec,
ARRAY_SIZE(ltr501_als_event_spec)),
@@ -576,6 +609,7 @@ static const struct iio_chan_spec ltr501_channels[] = {
};
static const struct iio_chan_spec ltr301_channels[] = {
+ LTR501_LIGHT_CHANNEL(),
LTR501_INTENSITY_CHANNEL(0, LTR501_ALS_DATA0, IIO_MOD_LIGHT_BOTH, 0,
ltr501_als_event_spec,
ARRAY_SIZE(ltr501_als_event_spec)),
@@ -596,6 +630,23 @@ static int ltr501_read_raw(struct iio_dev *indio_dev,
int ret, i;
switch (mask) {
+ case IIO_CHAN_INFO_PROCESSED:
+ if (iio_buffer_enabled(indio_dev))
+ return -EBUSY;
+
+ switch (chan->type) {
+ case IIO_LIGHT:
+ mutex_lock(&data->lock_als);
+ ret = ltr501_read_als(data, buf);
+ mutex_unlock(&data->lock_als);
+ if (ret < 0)
+ return ret;
+ *val = ltr501_calculate_lux(le16_to_cpu(buf[1]),
+ le16_to_cpu(buf[0]));
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
case IIO_CHAN_INFO_RAW:
if (iio_buffer_enabled(indio_dev))
return -EBUSY;
@@ -865,9 +916,9 @@ static int ltr501_write_thresh(struct iio_dev *indio_dev,
return -EINVAL;
}
case IIO_PROXIMITY:
- switch (dir) {
if (val > LTR501_PS_THRESH_MASK)
return -EINVAL;
+ switch (dir) {
case IIO_EV_DIR_RISING:
mutex_lock(&data->lock_ps);
ret = regmap_bulk_write(data->regmap,
diff --git a/drivers/iio/light/stk3310.c b/drivers/iio/light/stk3310.c
new file mode 100644
index 000000000000..e79b9d89b024
--- /dev/null
+++ b/drivers/iio/light/stk3310.c
@@ -0,0 +1,722 @@
+/**
+ * Sensortek STK3310/STK3311 Ambient Light and Proximity Sensor
+ *
+ * Copyright (c) 2015, Intel Corporation.
+ *
+ * This file is subject to the terms and conditions of version 2 of
+ * the GNU General Public License. See the file COPYING in the main
+ * directory of this archive for more details.
+ *
+ * IIO driver for STK3310/STK3311. 7-bit I2C address: 0x48.
+ */
+
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define STK3310_REG_STATE 0x00
+#define STK3310_REG_PSCTRL 0x01
+#define STK3310_REG_ALSCTRL 0x02
+#define STK3310_REG_INT 0x04
+#define STK3310_REG_THDH_PS 0x06
+#define STK3310_REG_THDL_PS 0x08
+#define STK3310_REG_FLAG 0x10
+#define STK3310_REG_PS_DATA_MSB 0x11
+#define STK3310_REG_PS_DATA_LSB 0x12
+#define STK3310_REG_ALS_DATA_MSB 0x13
+#define STK3310_REG_ALS_DATA_LSB 0x14
+#define STK3310_REG_ID 0x3E
+#define STK3310_MAX_REG 0x80
+
+#define STK3310_STATE_EN_PS 0x01
+#define STK3310_STATE_EN_ALS 0x02
+#define STK3310_STATE_STANDBY 0x00
+
+#define STK3310_CHIP_ID_VAL 0x13
+#define STK3311_CHIP_ID_VAL 0x1D
+#define STK3310_PSINT_EN 0x01
+#define STK3310_PS_MAX_VAL 0xFFFF
+#define STK3310_THRESH_MAX 0xFFFF
+
+#define STK3310_DRIVER_NAME "stk3310"
+#define STK3310_REGMAP_NAME "stk3310_regmap"
+#define STK3310_EVENT "stk3310_event"
+#define STK3310_GPIO "stk3310_gpio"
+
+#define STK3310_SCALE_AVAILABLE "6.4 1.6 0.4 0.1"
+
+#define STK3310_IT_AVAILABLE \
+ "0.000185 0.000370 0.000741 0.001480 0.002960 0.005920 0.011840 " \
+ "0.023680 0.047360 0.094720 0.189440 0.378880 0.757760 1.515520 " \
+ "3.031040 6.062080"
+
+#define STK3310_REGFIELD(name) \
+ do { \
+ data->reg_##name = \
+ devm_regmap_field_alloc(&client->dev, regmap, \
+ stk3310_reg_field_##name); \
+ if (IS_ERR(data->reg_##name)) { \
+ dev_err(&client->dev, "reg field alloc failed.\n"); \
+ return PTR_ERR(data->reg_##name); \
+ } \
+ } while (0)
+
+static const struct reg_field stk3310_reg_field_state =
+ REG_FIELD(STK3310_REG_STATE, 0, 2);
+static const struct reg_field stk3310_reg_field_als_gain =
+ REG_FIELD(STK3310_REG_ALSCTRL, 4, 5);
+static const struct reg_field stk3310_reg_field_ps_gain =
+ REG_FIELD(STK3310_REG_PSCTRL, 4, 5);
+static const struct reg_field stk3310_reg_field_als_it =
+ REG_FIELD(STK3310_REG_ALSCTRL, 0, 3);
+static const struct reg_field stk3310_reg_field_ps_it =
+ REG_FIELD(STK3310_REG_PSCTRL, 0, 3);
+static const struct reg_field stk3310_reg_field_int_ps =
+ REG_FIELD(STK3310_REG_INT, 0, 2);
+static const struct reg_field stk3310_reg_field_flag_psint =
+ REG_FIELD(STK3310_REG_FLAG, 4, 4);
+static const struct reg_field stk3310_reg_field_flag_nf =
+ REG_FIELD(STK3310_REG_FLAG, 0, 0);
+/*
+ * Maximum PS values with regard to scale. Used to export the 'inverse'
+ * PS value (high values for far objects, low values for near objects).
+ */
+static const int stk3310_ps_max[4] = {
+ STK3310_PS_MAX_VAL / 64,
+ STK3310_PS_MAX_VAL / 16,
+ STK3310_PS_MAX_VAL / 4,
+ STK3310_PS_MAX_VAL,
+};
+
+static const int stk3310_scale_table[][2] = {
+ {6, 400000}, {1, 600000}, {0, 400000}, {0, 100000}
+};
+
+/* Integration time in seconds, microseconds */
+static const int stk3310_it_table[][2] = {
+ {0, 185}, {0, 370}, {0, 741}, {0, 1480},
+ {0, 2960}, {0, 5920}, {0, 11840}, {0, 23680},
+ {0, 47360}, {0, 94720}, {0, 189440}, {0, 378880},
+ {0, 757760}, {1, 515520}, {3, 31040}, {6, 62080},
+};
+
+struct stk3310_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ bool als_enabled;
+ bool ps_enabled;
+ u64 timestamp;
+ struct regmap *regmap;
+ struct regmap_field *reg_state;
+ struct regmap_field *reg_als_gain;
+ struct regmap_field *reg_ps_gain;
+ struct regmap_field *reg_als_it;
+ struct regmap_field *reg_ps_it;
+ struct regmap_field *reg_int_ps;
+ struct regmap_field *reg_flag_psint;
+ struct regmap_field *reg_flag_nf;
+};
+
+static const struct iio_event_spec stk3310_events[] = {
+ /* Proximity event */
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+ /* Out-of-proximity event */
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_chan_spec stk3310_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate =
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ },
+ {
+ .type = IIO_PROXIMITY,
+ .info_mask_separate =
+ BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ .event_spec = stk3310_events,
+ .num_event_specs = ARRAY_SIZE(stk3310_events),
+ }
+};
+
+static IIO_CONST_ATTR(in_illuminance_scale_available, STK3310_SCALE_AVAILABLE);
+
+static IIO_CONST_ATTR(in_proximity_scale_available, STK3310_SCALE_AVAILABLE);
+
+static IIO_CONST_ATTR(in_illuminance_integration_time_available,
+ STK3310_IT_AVAILABLE);
+
+static IIO_CONST_ATTR(in_proximity_integration_time_available,
+ STK3310_IT_AVAILABLE);
+
+static struct attribute *stk3310_attributes[] = {
+ &iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
+ &iio_const_attr_in_proximity_scale_available.dev_attr.attr,
+ &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr,
+ &iio_const_attr_in_proximity_integration_time_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group stk3310_attribute_group = {
+ .attrs = stk3310_attributes
+};
+
+static int stk3310_get_index(const int table[][2], int table_size,
+ int val, int val2)
+{
+ int i;
+
+ for (i = 0; i < table_size; i++) {
+ if (val == table[i][0] && val2 == table[i][1])
+ return i;
+ }
+
+ return -EINVAL;
+}
+
+static int stk3310_read_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int *val, int *val2)
+{
+ u8 reg;
+ u16 buf;
+ int ret;
+ unsigned int index;
+ struct stk3310_data *data = iio_priv(indio_dev);
+
+ if (info != IIO_EV_INFO_VALUE)
+ return -EINVAL;
+
+ /*
+ * Only proximity interrupts are implemented at the moment.
+ * Since we're inverting proximity values, the sensor's 'high'
+ * threshold will become our 'low' threshold, associated with
+ * 'near' events. Similarly, the sensor's 'low' threshold will
+ * be our 'high' threshold, associated with 'far' events.
+ */
+ if (dir == IIO_EV_DIR_RISING)
+ reg = STK3310_REG_THDL_PS;
+ else if (dir == IIO_EV_DIR_FALLING)
+ reg = STK3310_REG_THDH_PS;
+ else
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+ ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
+ mutex_unlock(&data->lock);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "register read failed\n");
+ return ret;
+ }
+ regmap_field_read(data->reg_ps_gain, &index);
+ *val = swab16(stk3310_ps_max[index] - buf);
+
+ return IIO_VAL_INT;
+}
+
+static int stk3310_write_event(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ enum iio_event_info info,
+ int val, int val2)
+{
+ u8 reg;
+ u16 buf;
+ int ret;
+ unsigned int index;
+ struct stk3310_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+
+ regmap_field_read(data->reg_ps_gain, &index);
+ if (val > stk3310_ps_max[index])
+ return -EINVAL;
+
+ if (dir == IIO_EV_DIR_RISING)
+ reg = STK3310_REG_THDL_PS;
+ else if (dir == IIO_EV_DIR_FALLING)
+ reg = STK3310_REG_THDH_PS;
+ else
+ return -EINVAL;
+
+ buf = swab16(stk3310_ps_max[index] - val);
+ ret = regmap_bulk_write(data->regmap, reg, &buf, 2);
+ if (ret < 0)
+ dev_err(&client->dev, "failed to set PS threshold!\n");
+
+ return ret;
+}
+
+static int stk3310_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ unsigned int event_val;
+ struct stk3310_data *data = iio_priv(indio_dev);
+
+ regmap_field_read(data->reg_int_ps, &event_val);
+
+ return event_val;
+}
+
+static int stk3310_write_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir,
+ int state)
+{
+ int ret;
+ struct stk3310_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+
+ if (state < 0 || state > 7)
+ return -EINVAL;
+
+ /* Set INT_PS value */
+ mutex_lock(&data->lock);
+ ret = regmap_field_write(data->reg_int_ps, state);
+ if (ret < 0)
+ dev_err(&client->dev, "failed to set interrupt mode\n");
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int stk3310_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ u8 reg;
+ u16 buf;
+ int ret;
+ unsigned int index;
+ struct stk3310_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (chan->type == IIO_LIGHT)
+ reg = STK3310_REG_ALS_DATA_MSB;
+ else if (chan->type == IIO_PROXIMITY)
+ reg = STK3310_REG_PS_DATA_MSB;
+ else
+ return -EINVAL;
+ mutex_lock(&data->lock);
+ ret = regmap_bulk_read(data->regmap, reg, &buf, 2);
+ if (ret < 0) {
+ dev_err(&client->dev, "register read failed\n");
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+ *val = swab16(buf);
+ if (chan->type == IIO_PROXIMITY) {
+ /*
+ * Invert the proximity data so we return low values
+ * for close objects and high values for far ones.
+ */
+ regmap_field_read(data->reg_ps_gain, &index);
+ *val = stk3310_ps_max[index] - *val;
+ }
+ mutex_unlock(&data->lock);
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type == IIO_LIGHT)
+ regmap_field_read(data->reg_als_it, &index);
+ else
+ regmap_field_read(data->reg_ps_it, &index);
+ *val = stk3310_it_table[index][0];
+ *val2 = stk3310_it_table[index][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_CHAN_INFO_SCALE:
+ if (chan->type == IIO_LIGHT)
+ regmap_field_read(data->reg_als_gain, &index);
+ else
+ regmap_field_read(data->reg_ps_gain, &index);
+ *val = stk3310_scale_table[index][0];
+ *val2 = stk3310_scale_table[index][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+
+ return -EINVAL;
+}
+
+static int stk3310_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ int ret;
+ unsigned int index;
+ struct stk3310_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_INT_TIME:
+ index = stk3310_get_index(stk3310_it_table,
+ ARRAY_SIZE(stk3310_it_table),
+ val, val2);
+ if (index < 0)
+ return -EINVAL;
+ mutex_lock(&data->lock);
+ if (chan->type == IIO_LIGHT)
+ ret = regmap_field_write(data->reg_als_it, index);
+ else
+ ret = regmap_field_write(data->reg_ps_it, index);
+ if (ret < 0)
+ dev_err(&data->client->dev,
+ "sensor configuration failed\n");
+ mutex_unlock(&data->lock);
+ return ret;
+
+ case IIO_CHAN_INFO_SCALE:
+ index = stk3310_get_index(stk3310_scale_table,
+ ARRAY_SIZE(stk3310_scale_table),
+ val, val2);
+ if (index < 0)
+ return -EINVAL;
+ mutex_lock(&data->lock);
+ if (chan->type == IIO_LIGHT)
+ ret = regmap_field_write(data->reg_als_gain, index);
+ else
+ ret = regmap_field_write(data->reg_ps_gain, index);
+ if (ret < 0)
+ dev_err(&data->client->dev,
+ "sensor configuration failed\n");
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+
+ return -EINVAL;
+}
+
+static const struct iio_info stk3310_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = stk3310_read_raw,
+ .write_raw = stk3310_write_raw,
+ .attrs = &stk3310_attribute_group,
+ .read_event_value = stk3310_read_event,
+ .write_event_value = stk3310_write_event,
+ .read_event_config = stk3310_read_event_config,
+ .write_event_config = stk3310_write_event_config,
+};
+
+static int stk3310_set_state(struct stk3310_data *data, u8 state)
+{
+ int ret;
+ struct i2c_client *client = data->client;
+
+ /* 3-bit state; 0b100 is not supported. */
+ if (state > 7 || state == 4)
+ return -EINVAL;
+
+ mutex_lock(&data->lock);
+ ret = regmap_field_write(data->reg_state, state);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to change sensor state\n");
+ } else if (state != STK3310_STATE_STANDBY) {
+ /* Don't reset the 'enabled' flags if we're going in standby */
+ data->ps_enabled = !!(state & 0x01);
+ data->als_enabled = !!(state & 0x02);
+ }
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int stk3310_init(struct iio_dev *indio_dev)
+{
+ int ret;
+ int chipid;
+ u8 state;
+ struct stk3310_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+
+ regmap_read(data->regmap, STK3310_REG_ID, &chipid);
+ if (chipid != STK3310_CHIP_ID_VAL &&
+ chipid != STK3311_CHIP_ID_VAL) {
+ dev_err(&client->dev, "invalid chip id: 0x%x\n", chipid);
+ return -ENODEV;
+ }
+
+ state = STK3310_STATE_EN_ALS | STK3310_STATE_EN_PS;
+ ret = stk3310_set_state(data, state);
+ if (ret < 0) {
+ dev_err(&client->dev, "failed to enable sensor");
+ return ret;
+ }
+
+ /* Enable PS interrupts */
+ ret = regmap_field_write(data->reg_int_ps, STK3310_PSINT_EN);
+ if (ret < 0)
+ dev_err(&client->dev, "failed to enable interrupts!\n");
+
+ return ret;
+}
+
+static int stk3310_gpio_probe(struct i2c_client *client)
+{
+ struct device *dev;
+ struct gpio_desc *gpio;
+ int ret;
+
+ if (!client)
+ return -EINVAL;
+
+ dev = &client->dev;
+
+ /* gpio interrupt pin */
+ gpio = devm_gpiod_get_index(dev, STK3310_GPIO, 0);
+ if (IS_ERR(gpio)) {
+ dev_err(dev, "acpi gpio get index failed\n");
+ return PTR_ERR(gpio);
+ }
+
+ ret = gpiod_direction_input(gpio);
+ if (ret)
+ return ret;
+
+ ret = gpiod_to_irq(gpio);
+ dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
+
+ return ret;
+}
+
+static bool stk3310_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case STK3310_REG_ALS_DATA_MSB:
+ case STK3310_REG_ALS_DATA_LSB:
+ case STK3310_REG_PS_DATA_LSB:
+ case STK3310_REG_PS_DATA_MSB:
+ case STK3310_REG_FLAG:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static struct regmap_config stk3310_regmap_config = {
+ .name = STK3310_REGMAP_NAME,
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = STK3310_MAX_REG,
+ .cache_type = REGCACHE_RBTREE,
+ .volatile_reg = stk3310_is_volatile_reg,
+};
+
+static int stk3310_regmap_init(struct stk3310_data *data)
+{
+ struct regmap *regmap;
+ struct i2c_client *client;
+
+ client = data->client;
+ regmap = devm_regmap_init_i2c(client, &stk3310_regmap_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&client->dev, "regmap initialization failed.\n");
+ return PTR_ERR(regmap);
+ }
+ data->regmap = regmap;
+
+ STK3310_REGFIELD(state);
+ STK3310_REGFIELD(als_gain);
+ STK3310_REGFIELD(ps_gain);
+ STK3310_REGFIELD(als_it);
+ STK3310_REGFIELD(ps_it);
+ STK3310_REGFIELD(int_ps);
+ STK3310_REGFIELD(flag_psint);
+ STK3310_REGFIELD(flag_nf);
+
+ return 0;
+}
+
+static irqreturn_t stk3310_irq_handler(int irq, void *private)
+{
+ struct iio_dev *indio_dev = private;
+ struct stk3310_data *data = iio_priv(indio_dev);
+
+ data->timestamp = iio_get_time_ns();
+
+ return IRQ_WAKE_THREAD;
+}
+
+static irqreturn_t stk3310_irq_event_handler(int irq, void *private)
+{
+ int ret;
+ unsigned int dir;
+ u64 event;
+
+ struct iio_dev *indio_dev = private;
+ struct stk3310_data *data = iio_priv(indio_dev);
+
+ /* Read FLAG_NF to figure out what threshold has been met. */
+ mutex_lock(&data->lock);
+ ret = regmap_field_read(data->reg_flag_nf, &dir);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "register read failed\n");
+ mutex_unlock(&data->lock);
+ return ret;
+ }
+ event = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 1,
+ IIO_EV_TYPE_THRESH,
+ (dir ? IIO_EV_DIR_RISING :
+ IIO_EV_DIR_FALLING));
+ iio_push_event(indio_dev, event, data->timestamp);
+
+ /* Reset the interrupt flag */
+ ret = regmap_field_write(data->reg_flag_psint, 0);
+ if (ret < 0)
+ dev_err(&data->client->dev, "failed to reset interrupts\n");
+ mutex_unlock(&data->lock);
+
+ return IRQ_HANDLED;
+}
+
+static int stk3310_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ int ret;
+ struct iio_dev *indio_dev;
+ struct stk3310_data *data;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev) {
+ dev_err(&client->dev, "iio allocation failed!\n");
+ return -ENOMEM;
+ }
+
+ data = iio_priv(indio_dev);
+ data->client = client;
+ i2c_set_clientdata(client, indio_dev);
+ mutex_init(&data->lock);
+
+ ret = stk3310_regmap_init(data);
+ if (ret < 0)
+ return ret;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &stk3310_info;
+ indio_dev->name = STK3310_DRIVER_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->channels = stk3310_channels;
+ indio_dev->num_channels = ARRAY_SIZE(stk3310_channels);
+
+ ret = stk3310_init(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "device_register failed\n");
+ stk3310_set_state(data, STK3310_STATE_STANDBY);
+ }
+
+ if (client->irq <= 0)
+ client->irq = stk3310_gpio_probe(client);
+
+ if (client->irq >= 0) {
+ ret = devm_request_threaded_irq(&client->dev, client->irq,
+ stk3310_irq_handler,
+ stk3310_irq_event_handler,
+ IRQF_TRIGGER_FALLING |
+ IRQF_ONESHOT,
+ STK3310_EVENT, indio_dev);
+ if (ret < 0)
+ dev_err(&client->dev, "request irq %d failed\n",
+ client->irq);
+ }
+
+ return ret;
+}
+
+static int stk3310_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ return stk3310_set_state(iio_priv(indio_dev), STK3310_STATE_STANDBY);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int stk3310_suspend(struct device *dev)
+{
+ struct stk3310_data *data;
+
+ data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+
+ return stk3310_set_state(data, STK3310_STATE_STANDBY);
+}
+
+static int stk3310_resume(struct device *dev)
+{
+ int state = 0;
+ struct stk3310_data *data;
+
+ data = iio_priv(i2c_get_clientdata(to_i2c_client(dev)));
+ if (data->ps_enabled)
+ state |= STK3310_STATE_EN_PS;
+ if (data->als_enabled)
+ state |= STK3310_STATE_EN_ALS;
+
+ return stk3310_set_state(data, state);
+}
+
+static SIMPLE_DEV_PM_OPS(stk3310_pm_ops, stk3310_suspend, stk3310_resume);
+
+#define STK3310_PM_OPS (&stk3310_pm_ops)
+#else
+#define STK3310_PM_OPS NULL
+#endif
+
+static const struct i2c_device_id stk3310_i2c_id[] = {
+ {"STK3310", 0},
+ {"STK3311", 0},
+ {}
+};
+
+static const struct acpi_device_id stk3310_acpi_id[] = {
+ {"STK3310", 0},
+ {"STK3311", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(acpi, stk3310_acpi_id);
+
+static struct i2c_driver stk3310_driver = {
+ .driver = {
+ .name = "stk3310",
+ .pm = STK3310_PM_OPS,
+ .acpi_match_table = ACPI_PTR(stk3310_acpi_id),
+ },
+ .probe = stk3310_probe,
+ .remove = stk3310_remove,
+ .id_table = stk3310_i2c_id,
+};
+
+module_i2c_driver(stk3310_driver);
+
+MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>");
+MODULE_DESCRIPTION("STK3310 Ambient Light and Proximity Sensor driver");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-22 11:15:43 +0300