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-rw-r--r--drivers/iio/light/Kconfig31
-rw-r--r--drivers/iio/light/Makefile3
-rw-r--r--drivers/iio/light/al3010.c242
-rw-r--r--drivers/iio/light/al3320a.c72
-rw-r--r--drivers/iio/light/cros_ec_light_prox.c15
-rw-r--r--drivers/iio/light/gp2ap002.c720
-rw-r--r--drivers/iio/light/gp2ap020a00f.c23
-rw-r--r--drivers/iio/light/iqs621-als.c617
-rw-r--r--drivers/iio/light/si1133.c37
-rw-r--r--drivers/iio/light/vcnl4000.c144
10 files changed, 1835 insertions, 69 deletions
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index 9968f982fbc7..b27719cefcf9 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -43,6 +43,16 @@ config ADUX1020
To compile this driver as a module, choose M here: the
module will be called adux1020.
+config AL3010
+ tristate "AL3010 ambient light sensor"
+ depends on I2C
+ help
+ Say Y here if you want to build a driver for the Dyna Image AL3010
+ ambient light sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called al3010.
+
config AL3320A
tristate "AL3320A ambient light sensor"
depends on I2C
@@ -159,6 +169,17 @@ config IIO_CROS_EC_LIGHT_PROX
To compile this driver as a module, choose M here:
the module will be called cros_ec_light_prox.
+config GP2AP002
+ tristate "Sharp GP2AP002 Proximity/ALS sensor"
+ depends on I2C
+ select REGMAP
+ help
+ Say Y here if you have a Sharp GP2AP002 proximity/ALS combo-chip
+ hooked to an I2C bus.
+
+ To compile this driver as a module, choose M here: the
+ module will be called gp2ap002.
+
config GP2AP020A00F
tristate "Sharp GP2AP020A00F Proximity/ALS sensor"
depends on I2C
@@ -173,6 +194,16 @@ config GP2AP020A00F
To compile this driver as a module, choose M here: the
module will be called gp2ap020a00f.
+config IQS621_ALS
+ tristate "Azoteq IQS621/622 ambient light sensors"
+ depends on MFD_IQS62X || COMPILE_TEST
+ help
+ Say Y here if you want to build support for the Azoteq IQS621
+ and IQS622 ambient light sensors.
+
+ To compile this driver as a module, choose M here: the module
+ will be called iqs621-als.
+
config SENSORS_ISL29018
tristate "Intersil 29018 light and proximity sensor"
depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index c98d1cefb861..d1c8aa30b9a8 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -7,6 +7,7 @@
obj-$(CONFIG_ACPI_ALS) += acpi-als.o
obj-$(CONFIG_ADJD_S311) += adjd_s311.o
obj-$(CONFIG_ADUX1020) += adux1020.o
+obj-$(CONFIG_AL3010) += al3010.o
obj-$(CONFIG_AL3320A) += al3320a.o
obj-$(CONFIG_APDS9300) += apds9300.o
obj-$(CONFIG_APDS9960) += apds9960.o
@@ -18,9 +19,11 @@ obj-$(CONFIG_CM3323) += cm3323.o
obj-$(CONFIG_CM3605) += cm3605.o
obj-$(CONFIG_CM36651) += cm36651.o
obj-$(CONFIG_IIO_CROS_EC_LIGHT_PROX) += cros_ec_light_prox.o
+obj-$(CONFIG_GP2AP002) += gp2ap002.o
obj-$(CONFIG_GP2AP020A00F) += gp2ap020a00f.o
obj-$(CONFIG_HID_SENSOR_ALS) += hid-sensor-als.o
obj-$(CONFIG_HID_SENSOR_PROX) += hid-sensor-prox.o
+obj-$(CONFIG_IQS621_ALS) += iqs621-als.o
obj-$(CONFIG_SENSORS_ISL29018) += isl29018.o
obj-$(CONFIG_SENSORS_ISL29028) += isl29028.o
obj-$(CONFIG_ISL29125) += isl29125.o
diff --git a/drivers/iio/light/al3010.c b/drivers/iio/light/al3010.c
new file mode 100644
index 000000000000..b1ed7658cc46
--- /dev/null
+++ b/drivers/iio/light/al3010.c
@@ -0,0 +1,242 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * AL3010 - Dyna Image Ambient Light Sensor
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ * Copyright (c) 2016, Dyna-Image Corp.
+ * Copyright (c) 2020, David Heidelberg, Michał Mirosław, Dmitry Osipenko
+ *
+ * IIO driver for AL3010 (7-bit I2C slave address 0x1C).
+ *
+ * TODO: interrupt support, thresholds
+ * When the driver will get support for interrupt handling, then interrupt
+ * will need to be disabled before turning sensor OFF in order to avoid
+ * potential races with the interrupt handling.
+ */
+
+#include <linux/bitfield.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#define AL3010_DRV_NAME "al3010"
+
+#define AL3010_REG_SYSTEM 0x00
+#define AL3010_REG_DATA_LOW 0x0c
+#define AL3010_REG_CONFIG 0x10
+
+#define AL3010_CONFIG_DISABLE 0x00
+#define AL3010_CONFIG_ENABLE 0x01
+
+#define AL3010_GAIN_MASK GENMASK(6,4)
+
+#define AL3010_SCALE_AVAILABLE "1.1872 0.2968 0.0742 0.018"
+
+enum al3xxxx_range {
+ AL3XXX_RANGE_1, /* 77806 lx */
+ AL3XXX_RANGE_2, /* 19542 lx */
+ AL3XXX_RANGE_3, /* 4863 lx */
+ AL3XXX_RANGE_4 /* 1216 lx */
+};
+
+static const int al3010_scales[][2] = {
+ {0, 1187200}, {0, 296800}, {0, 74200}, {0, 18600}
+};
+
+struct al3010_data {
+ struct i2c_client *client;
+};
+
+static const struct iio_chan_spec al3010_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ }
+};
+
+static IIO_CONST_ATTR(in_illuminance_scale_available, AL3010_SCALE_AVAILABLE);
+
+static struct attribute *al3010_attributes[] = {
+ &iio_const_attr_in_illuminance_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group al3010_attribute_group = {
+ .attrs = al3010_attributes,
+};
+
+static int al3010_set_pwr(struct i2c_client *client, bool pwr)
+{
+ u8 val = pwr ? AL3010_CONFIG_ENABLE : AL3010_CONFIG_DISABLE;
+ return i2c_smbus_write_byte_data(client, AL3010_REG_SYSTEM, val);
+}
+
+static void al3010_set_pwr_off(void *_data)
+{
+ struct al3010_data *data = _data;
+
+ al3010_set_pwr(data->client, false);
+}
+
+static int al3010_init(struct al3010_data *data)
+{
+ int ret;
+
+ ret = al3010_set_pwr(data->client, true);
+
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, AL3010_REG_CONFIG,
+ FIELD_PREP(AL3010_GAIN_MASK,
+ AL3XXX_RANGE_3));
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int al3010_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val,
+ int *val2, long mask)
+{
+ struct al3010_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ /*
+ * ALS ADC value is stored in two adjacent registers:
+ * - low byte of output is stored at AL3010_REG_DATA_LOW
+ * - high byte of output is stored at AL3010_REG_DATA_LOW + 1
+ */
+ ret = i2c_smbus_read_word_data(data->client,
+ AL3010_REG_DATA_LOW);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_SCALE:
+ ret = i2c_smbus_read_byte_data(data->client,
+ AL3010_REG_CONFIG);
+ if (ret < 0)
+ return ret;
+
+ ret = FIELD_GET(AL3010_GAIN_MASK, ret);
+ *val = al3010_scales[ret][0];
+ *val2 = al3010_scales[ret][1];
+
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ return -EINVAL;
+}
+
+static int al3010_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val,
+ int val2, long mask)
+{
+ struct al3010_data *data = iio_priv(indio_dev);
+ int i;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ for (i = 0; i < ARRAY_SIZE(al3010_scales); i++) {
+ if (val != al3010_scales[i][0] ||
+ val2 != al3010_scales[i][1])
+ continue;
+
+ return i2c_smbus_write_byte_data(data->client,
+ AL3010_REG_CONFIG,
+ FIELD_PREP(AL3010_GAIN_MASK, i));
+ }
+ break;
+ }
+ return -EINVAL;
+}
+
+static const struct iio_info al3010_info = {
+ .read_raw = al3010_read_raw,
+ .write_raw = al3010_write_raw,
+ .attrs = &al3010_attribute_group,
+};
+
+static int al3010_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct al3010_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ 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;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &al3010_info;
+ indio_dev->name = AL3010_DRV_NAME;
+ indio_dev->channels = al3010_channels;
+ indio_dev->num_channels = ARRAY_SIZE(al3010_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = al3010_init(data);
+ if (ret < 0) {
+ dev_err(&client->dev, "al3010 chip init failed\n");
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&client->dev,
+ al3010_set_pwr_off,
+ data);
+ if (ret < 0)
+ return ret;
+
+ return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+static int __maybe_unused al3010_suspend(struct device *dev)
+{
+ return al3010_set_pwr(to_i2c_client(dev), false);
+}
+
+static int __maybe_unused al3010_resume(struct device *dev)
+{
+ return al3010_set_pwr(to_i2c_client(dev), true);
+}
+
+static SIMPLE_DEV_PM_OPS(al3010_pm_ops, al3010_suspend, al3010_resume);
+
+static const struct i2c_device_id al3010_id[] = {
+ {"al3010", },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, al3010_id);
+
+static const struct of_device_id al3010_of_match[] = {
+ { .compatible = "dynaimage,al3010", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, al3010_of_match);
+
+static struct i2c_driver al3010_driver = {
+ .driver = {
+ .name = AL3010_DRV_NAME,
+ .of_match_table = al3010_of_match,
+ .pm = &al3010_pm_ops,
+ },
+ .probe = al3010_probe,
+ .id_table = al3010_id,
+};
+module_i2c_driver(al3010_driver);
+
+MODULE_AUTHOR("Daniel Baluta <daniel.baluta@nxp.com>");
+MODULE_AUTHOR("David Heidelberg <david@ixit.cz>");
+MODULE_DESCRIPTION("AL3010 Ambient Light Sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/al3320a.c b/drivers/iio/light/al3320a.c
index a21aa99e74e4..20ed0a73c390 100644
--- a/drivers/iio/light/al3320a.c
+++ b/drivers/iio/light/al3320a.c
@@ -7,11 +7,15 @@
* IIO driver for AL3320A (7-bit I2C slave address 0x1C).
*
* TODO: interrupt support, thresholds
+ * When the driver will get support for interrupt handling, then interrupt
+ * will need to be disabled before turning sensor OFF in order to avoid
+ * potential races with the interrupt handling.
*/
-#include <linux/module.h>
-#include <linux/init.h>
+#include <linux/bitfield.h>
#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@@ -36,8 +40,7 @@
#define AL3320A_CONFIG_DISABLE 0x00
#define AL3320A_CONFIG_ENABLE 0x01
-#define AL3320A_GAIN_SHIFT 1
-#define AL3320A_GAIN_MASK (BIT(2) | BIT(1))
+#define AL3320A_GAIN_MASK GENMASK(2, 1)
/* chip params default values */
#define AL3320A_DEFAULT_MEAN_TIME 4
@@ -79,18 +82,31 @@ static const struct attribute_group al3320a_attribute_group = {
.attrs = al3320a_attributes,
};
+static int al3320a_set_pwr(struct i2c_client *client, bool pwr)
+{
+ u8 val = pwr ? AL3320A_CONFIG_ENABLE : AL3320A_CONFIG_DISABLE;
+ return i2c_smbus_write_byte_data(client, AL3320A_REG_CONFIG, val);
+}
+
+static void al3320a_set_pwr_off(void *_data)
+{
+ struct al3320a_data *data = _data;
+
+ al3320a_set_pwr(data->client, false);
+}
+
static int al3320a_init(struct al3320a_data *data)
{
int ret;
- /* power on */
- ret = i2c_smbus_write_byte_data(data->client, AL3320A_REG_CONFIG,
- AL3320A_CONFIG_ENABLE);
+ ret = al3320a_set_pwr(data->client, true);
+
if (ret < 0)
return ret;
ret = i2c_smbus_write_byte_data(data->client, AL3320A_REG_CONFIG_RANGE,
- AL3320A_RANGE_3 << AL3320A_GAIN_SHIFT);
+ FIELD_PREP(AL3320A_GAIN_MASK,
+ AL3320A_RANGE_3));
if (ret < 0)
return ret;
@@ -133,7 +149,7 @@ static int al3320a_read_raw(struct iio_dev *indio_dev,
if (ret < 0)
return ret;
- ret = (ret & AL3320A_GAIN_MASK) >> AL3320A_GAIN_SHIFT;
+ ret = FIELD_GET(AL3320A_GAIN_MASK, ret);
*val = al3320a_scales[ret][0];
*val2 = al3320a_scales[ret][1];
@@ -152,11 +168,13 @@ static int al3320a_write_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_SCALE:
for (i = 0; i < ARRAY_SIZE(al3320a_scales); i++) {
- if (val == al3320a_scales[i][0] &&
- val2 == al3320a_scales[i][1])
- return i2c_smbus_write_byte_data(data->client,
+ if (val != al3320a_scales[i][0] ||
+ val2 != al3320a_scales[i][1])
+ continue;
+
+ return i2c_smbus_write_byte_data(data->client,
AL3320A_REG_CONFIG_RANGE,
- i << AL3320A_GAIN_SHIFT);
+ FIELD_PREP(AL3320A_GAIN_MASK, i));
}
break;
}
@@ -196,27 +214,47 @@ static int al3320a_probe(struct i2c_client *client,
dev_err(&client->dev, "al3320a chip init failed\n");
return ret;
}
+
+ ret = devm_add_action_or_reset(&client->dev,
+ al3320a_set_pwr_off,
+ data);
+ if (ret < 0)
+ return ret;
+
return devm_iio_device_register(&client->dev, indio_dev);
}
-static int al3320a_remove(struct i2c_client *client)
+static int __maybe_unused al3320a_suspend(struct device *dev)
+{
+ return al3320a_set_pwr(to_i2c_client(dev), false);
+}
+
+static int __maybe_unused al3320a_resume(struct device *dev)
{
- return i2c_smbus_write_byte_data(client, AL3320A_REG_CONFIG,
- AL3320A_CONFIG_DISABLE);
+ return al3320a_set_pwr(to_i2c_client(dev), true);
}
+static SIMPLE_DEV_PM_OPS(al3320a_pm_ops, al3320a_suspend, al3320a_resume);
+
static const struct i2c_device_id al3320a_id[] = {
{"al3320a", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, al3320a_id);
+static const struct of_device_id al3320a_of_match[] = {
+ { .compatible = "dynaimage,al3320a", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, al3320a_of_match);
+
static struct i2c_driver al3320a_driver = {
.driver = {
.name = AL3320A_DRV_NAME,
+ .of_match_table = al3320a_of_match,
+ .pm = &al3320a_pm_ops,
},
.probe = al3320a_probe,
- .remove = al3320a_remove,
.id_table = al3320a_id,
};
diff --git a/drivers/iio/light/cros_ec_light_prox.c b/drivers/iio/light/cros_ec_light_prox.c
index 7a838e2956f4..2198b50909ed 100644
--- a/drivers/iio/light/cros_ec_light_prox.c
+++ b/drivers/iio/light/cros_ec_light_prox.c
@@ -177,10 +177,14 @@ static int cros_ec_light_prox_probe(struct platform_device *pdev)
if (!indio_dev)
return -ENOMEM;
- ret = cros_ec_sensors_core_init(pdev, indio_dev, true);
+ ret = cros_ec_sensors_core_init(pdev, indio_dev, true,
+ cros_ec_sensors_capture,
+ cros_ec_sensors_push_data);
if (ret)
return ret;
+ iio_buffer_set_attrs(indio_dev->buffer, cros_ec_sensor_fifo_attributes);
+
indio_dev->info = &cros_ec_light_prox_info;
state = iio_priv(indio_dev);
state->core.type = state->core.resp->info.type;
@@ -189,8 +193,7 @@ static int cros_ec_light_prox_probe(struct platform_device *pdev)
/* Common part */
channel->info_mask_shared_by_all =
- BIT(IIO_CHAN_INFO_SAMP_FREQ) |
- BIT(IIO_CHAN_INFO_FREQUENCY);
+ BIT(IIO_CHAN_INFO_SAMP_FREQ);
channel->info_mask_shared_by_all_available =
BIT(IIO_CHAN_INFO_SAMP_FREQ);
channel->scan_type.realbits = CROS_EC_SENSOR_BITS;
@@ -236,11 +239,6 @@ static int cros_ec_light_prox_probe(struct platform_device *pdev)
state->core.read_ec_sensors_data = cros_ec_sensors_read_cmd;
- ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL,
- cros_ec_sensors_capture, NULL);
- if (ret)
- return ret;
-
return devm_iio_device_register(dev, indio_dev);
}
@@ -258,7 +256,6 @@ MODULE_DEVICE_TABLE(platform, cros_ec_light_prox_ids);
static struct platform_driver cros_ec_light_prox_platform_driver = {
.driver = {
.name = "cros-ec-light-prox",
- .pm = &cros_ec_sensors_pm_ops,
},
.probe = cros_ec_light_prox_probe,
.id_table = cros_ec_light_prox_ids,
diff --git a/drivers/iio/light/gp2ap002.c b/drivers/iio/light/gp2ap002.c
new file mode 100644
index 000000000000..b7ef16b28280
--- /dev/null
+++ b/drivers/iio/light/gp2ap002.c
@@ -0,0 +1,720 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * These are the two Sharp GP2AP002 variants supported by this driver:
+ * GP2AP002A00F Ambient Light and Proximity Sensor
+ * GP2AP002S00F Proximity Sensor
+ *
+ * Copyright (C) 2020 Linaro Ltd.
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * Based partly on the code in Sony Ericssons GP2AP00200F driver by
+ * Courtney Cavin and Oskar Andero in drivers/input/misc/gp2ap002a00f.c
+ * Based partly on a Samsung misc driver submitted by
+ * Donggeun Kim & Minkyu Kang in 2011:
+ * https://lore.kernel.org/lkml/1315556546-7445-1-git-send-email-dg77.kim@samsung.com/
+ * Based partly on a submission by
+ * Jonathan Bakker and Paweł Chmiel in january 2019:
+ * https://lore.kernel.org/linux-input/20190125175045.22576-1-pawel.mikolaj.chmiel@gmail.com/
+ * Based partly on code from the Samsung GT-S7710 by <mjchen@sta.samsung.com>
+ * Based partly on the code in LG Electronics GP2AP00200F driver by
+ * Kenobi Lee <sungyoung.lee@lge.com> and EunYoung Cho <ey.cho@lge.com>
+ */
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/events.h>
+#include <linux/iio/consumer.h> /* To get our ADC channel */
+#include <linux/iio/types.h> /* To deal with our ADC channel */
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/interrupt.h>
+#include <linux/bits.h>
+#include <linux/math64.h>
+#include <linux/pm.h>
+
+#define GP2AP002_PROX_CHANNEL 0
+#define GP2AP002_ALS_CHANNEL 1
+
+/* ------------------------------------------------------------------------ */
+/* ADDRESS SYMBOL DATA Init R/W */
+/* D7 D6 D5 D4 D3 D2 D1 D0 */
+/* ------------------------------------------------------------------------ */
+/* 0 PROX X X X X X X X VO H'00 R */
+/* 1 GAIN X X X X LED0 X X X H'00 W */
+/* 2 HYS HYSD HYSC1 HYSC0 X HYSF3 HYSF2 HYSF1 HYSF0 H'00 W */
+/* 3 CYCLE X X CYCL2 CYCL1 CYCL0 OSC2 X X H'00 W */
+/* 4 OPMOD X X X ASD X X VCON SSD H'00 W */
+/* 6 CON X X X OCON1 OCON0 X X X H'00 W */
+/* ------------------------------------------------------------------------ */
+/* VO :Proximity sensing result(0: no detection, 1: detection) */
+/* LED0 :Select switch for LED driver's On-registence(0:2x higher, 1:normal)*/
+/* HYSD/HYSF :Adjusts the receiver sensitivity */
+/* OSC :Select switch internal clocl frequency hoppling(0:effective) */
+/* CYCL :Determine the detection cycle(typically 8ms, up to 128x) */
+/* SSD :Software Shutdown function(0:shutdown, 1:operating) */
+/* VCON :VOUT output method control(0:normal, 1:interrupt) */
+/* ASD :Select switch for analog sleep function(0:ineffective, 1:effective)*/
+/* OCON :Select switch for enabling/disabling VOUT (00:enable, 11:disable) */
+
+#define GP2AP002_PROX 0x00
+#define GP2AP002_GAIN 0x01
+#define GP2AP002_HYS 0x02
+#define GP2AP002_CYCLE 0x03
+#define GP2AP002_OPMOD 0x04
+#define GP2AP002_CON 0x06
+
+#define GP2AP002_PROX_VO_DETECT BIT(0)
+
+/* Setting this bit to 0 means 2x higher LED resistance */
+#define GP2AP002_GAIN_LED_NORMAL BIT(3)
+
+/*
+ * These bits adjusts the proximity sensitivity, determining characteristics
+ * of the detection distance and its hysteresis.
+ */
+#define GP2AP002_HYS_HYSD_SHIFT 7
+#define GP2AP002_HYS_HYSD_MASK BIT(7)
+#define GP2AP002_HYS_HYSC_SHIFT 5
+#define GP2AP002_HYS_HYSC_MASK GENMASK(6, 5)
+#define GP2AP002_HYS_HYSF_SHIFT 0
+#define GP2AP002_HYS_HYSF_MASK GENMASK(3, 0)
+#define GP2AP002_HYS_MASK (GP2AP002_HYS_HYSD_MASK | \
+ GP2AP002_HYS_HYSC_MASK | \
+ GP2AP002_HYS_HYSF_MASK)
+
+/*
+ * These values determine the detection cycle response time
+ * 0: 8ms, 1: 16ms, 2: 32ms, 3: 64ms, 4: 128ms,
+ * 5: 256ms, 6: 512ms, 7: 1024ms
+ */
+#define GP2AP002_CYCLE_CYCL_SHIFT 3
+#define GP2AP002_CYCLE_CYCL_MASK GENMASK(5, 3)
+
+/*
+ * Select switch for internal clock frequency hopping
+ * 0: effective,
+ * 1: ineffective
+ */
+#define GP2AP002_CYCLE_OSC_EFFECTIVE 0
+#define GP2AP002_CYCLE_OSC_INEFFECTIVE BIT(2)
+#define GP2AP002_CYCLE_OSC_MASK BIT(2)
+
+/* Analog sleep effective */
+#define GP2AP002_OPMOD_ASD BIT(4)
+/* Enable chip */
+#define GP2AP002_OPMOD_SSD_OPERATING BIT(0)
+/* IRQ mode */
+#define GP2AP002_OPMOD_VCON_IRQ BIT(1)
+#define GP2AP002_OPMOD_MASK (BIT(0) | BIT(1) | BIT(4))
+
+/*
+ * Select switch for enabling/disabling Vout pin
+ * 0: enable
+ * 2: force to go Low
+ * 3: force to go High
+ */
+#define GP2AP002_CON_OCON_SHIFT 3
+#define GP2AP002_CON_OCON_ENABLE (0x0 << GP2AP002_CON_OCON_SHIFT)
+#define GP2AP002_CON_OCON_LOW (0x2 << GP2AP002_CON_OCON_SHIFT)
+#define GP2AP002_CON_OCON_HIGH (0x3 << GP2AP002_CON_OCON_SHIFT)
+#define GP2AP002_CON_OCON_MASK (0x3 << GP2AP002_CON_OCON_SHIFT)
+
+/**
+ * struct gp2ap002 - GP2AP002 state
+ * @map: regmap pointer for the i2c regmap
+ * @dev: pointer to parent device
+ * @vdd: regulator controlling VDD
+ * @vio: regulator controlling VIO
+ * @alsout: IIO ADC channel to convert the ALSOUT signal
+ * @hys_far: hysteresis control from device tree
+ * @hys_close: hysteresis control from device tree
+ * @is_gp2ap002s00f: this is the GP2AP002F variant of the chip
+ * @irq: the IRQ line used by this device
+ * @enabled: we cannot read the status of the hardware so we need to
+ * keep track of whether the event is enabled using this state variable
+ */
+struct gp2ap002 {
+ struct regmap *map;
+ struct device *dev;
+ struct regulator *vdd;
+ struct regulator *vio;
+ struct iio_channel *alsout;
+ u8 hys_far;
+ u8 hys_close;
+ bool is_gp2ap002s00f;
+ int irq;
+ bool enabled;
+};
+
+static irqreturn_t gp2ap002_prox_irq(int irq, void *d)
+{
+ struct iio_dev *indio_dev = d;
+ struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
+ u64 ev;
+ int val;
+ int ret;
+
+ ret = regmap_read(gp2ap002->map, GP2AP002_PROX, &val);
+ if (ret) {
+ dev_err(gp2ap002->dev, "error reading proximity\n");
+ goto err_retrig;
+ }
+
+ if (val & GP2AP002_PROX_VO_DETECT) {
+ /* Close */
+ dev_dbg(gp2ap002->dev, "close\n");
+ ret = regmap_write(gp2ap002->map, GP2AP002_HYS,
+ gp2ap002->hys_far);
+ if (ret)
+ dev_err(gp2ap002->dev,
+ "error setting up proximity hysteresis\n");
+ ev = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, GP2AP002_PROX_CHANNEL,
+ IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING);
+ } else {
+ /* Far */
+ dev_dbg(gp2ap002->dev, "far\n");
+ ret = regmap_write(gp2ap002->map, GP2AP002_HYS,
+ gp2ap002->hys_close);
+ if (ret)
+ dev_err(gp2ap002->dev,
+ "error setting up proximity hysteresis\n");
+ ev = IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, GP2AP002_PROX_CHANNEL,
+ IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING);
+ }
+ iio_push_event(indio_dev, ev, iio_get_time_ns(indio_dev));
+
+ /*
+ * After changing hysteresis, we need to wait for one detection
+ * cycle to see if anything changed, or we will just trigger the
+ * previous interrupt again. A detection cycle depends on the CYCLE
+ * register, we are hard-coding ~8 ms in probe() so wait some more
+ * than this, 20-30 ms.
+ */
+ usleep_range(20000, 30000);
+
+err_retrig:
+ ret = regmap_write(gp2ap002->map, GP2AP002_CON,
+ GP2AP002_CON_OCON_ENABLE);
+ if (ret)
+ dev_err(gp2ap002->dev, "error setting up VOUT control\n");
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * This array maps current and lux.
+ *
+ * Ambient light sensing range is 3 to 55000 lux.
+ *
+ * This mapping is based on the following formula.
+ * illuminance = 10 ^ (current[mA] / 10)
+ *
+ * When the ADC measures 0, return 0 lux.
+ */
+static const u16 gp2ap002_illuminance_table[] = {
+ 0, 1, 1, 2, 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 25, 32, 40, 50, 63, 79,
+ 100, 126, 158, 200, 251, 316, 398, 501, 631, 794, 1000, 1259, 1585,
+ 1995, 2512, 3162, 3981, 5012, 6310, 7943, 10000, 12589, 15849, 19953,
+ 25119, 31623, 39811, 50119,
+};
+
+static int gp2ap002_get_lux(struct gp2ap002 *gp2ap002)
+{
+ int ret, res;
+ u16 lux;
+
+ ret = iio_read_channel_processed(gp2ap002->alsout, &res);
+ if (ret < 0)
+ return ret;
+
+ dev_dbg(gp2ap002->dev, "read %d mA from ADC\n", res);
+
+ /* ensure we don't under/overflow */
+ res = clamp(res, 0, (int)ARRAY_SIZE(gp2ap002_illuminance_table) - 1);
+ lux = gp2ap002_illuminance_table[res];
+
+ return (int)lux;
+}
+
+static int gp2ap002_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = gp2ap002_get_lux(gp2ap002);
+ if (ret < 0)
+ return ret;
+ *val = ret;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+static int gp2ap002_init(struct gp2ap002 *gp2ap002)
+{
+ int ret;
+
+ /* Set up the IR LED resistance */
+ ret = regmap_write(gp2ap002->map, GP2AP002_GAIN,
+ GP2AP002_GAIN_LED_NORMAL);
+ if (ret) {
+ dev_err(gp2ap002->dev, "error setting up LED gain\n");
+ return ret;
+ }
+ ret = regmap_write(gp2ap002->map, GP2AP002_HYS, gp2ap002->hys_far);
+ if (ret) {
+ dev_err(gp2ap002->dev,
+ "error setting up proximity hysteresis\n");
+ return ret;
+ }
+
+ /* Disable internal frequency hopping */
+ ret = regmap_write(gp2ap002->map, GP2AP002_CYCLE,
+ GP2AP002_CYCLE_OSC_INEFFECTIVE);
+ if (ret) {
+ dev_err(gp2ap002->dev,
+ "error setting up internal frequency hopping\n");
+ return ret;
+ }
+
+ /* Enable chip and IRQ, disable analog sleep */
+ ret = regmap_write(gp2ap002->map, GP2AP002_OPMOD,
+ GP2AP002_OPMOD_SSD_OPERATING |
+ GP2AP002_OPMOD_VCON_IRQ);
+ if (ret) {
+ dev_err(gp2ap002->dev, "error setting up operation mode\n");
+ return ret;
+ }
+
+ /* Interrupt on VOUT enabled */
+ ret = regmap_write(gp2ap002->map, GP2AP002_CON,
+ GP2AP002_CON_OCON_ENABLE);
+ if (ret)
+ dev_err(gp2ap002->dev, "error setting up VOUT control\n");
+
+ return ret;
+}
+
+static int gp2ap002_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
+
+ /*
+ * We just keep track of this internally, as it is not possible to
+ * query the hardware.
+ */
+ return gp2ap002->enabled;
+}
+
+static int gp2ap002_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)
+{
+ struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
+
+ if (state) {
+ /*
+ * This will bring the regulators up (unless they are on
+ * already) and reintialize the sensor by using runtime_pm
+ * callbacks.
+ */
+ pm_runtime_get_sync(gp2ap002->dev);
+ gp2ap002->enabled = true;
+ } else {
+ pm_runtime_mark_last_busy(gp2ap002->dev);
+ pm_runtime_put_autosuspend(gp2ap002->dev);
+ gp2ap002->enabled = false;
+ }
+
+ return 0;
+}
+
+static const struct iio_info gp2ap002_info = {
+ .read_raw = gp2ap002_read_raw,
+ .read_event_config = gp2ap002_read_event_config,
+ .write_event_config = gp2ap002_write_event_config,
+};
+
+static const struct iio_event_spec gp2ap002_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_chan_spec gp2ap002_channels[] = {
+ {
+ .type = IIO_PROXIMITY,
+ .event_spec = gp2ap002_events,
+ .num_event_specs = ARRAY_SIZE(gp2ap002_events),
+ },
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .channel = GP2AP002_ALS_CHANNEL,
+ },
+};
+
+/*
+ * We need a special regmap because this hardware expects to
+ * write single bytes to registers but read a 16bit word on some
+ * variants and discard the lower 8 bits so combine
+ * i2c_smbus_read_word_data() with i2c_smbus_write_byte_data()
+ * selectively like this.
+ */
+static int gp2ap002_regmap_i2c_read(void *context, unsigned int reg,
+ unsigned int *val)
+{
+ struct device *dev = context;
+ struct i2c_client *i2c = to_i2c_client(dev);
+ int ret;
+
+ ret = i2c_smbus_read_word_data(i2c, reg);
+ if (ret < 0)
+ return ret;
+
+ *val = (ret >> 8) & 0xFF;
+
+ return 0;
+}
+
+static int gp2ap002_regmap_i2c_write(void *context, unsigned int reg,
+ unsigned int val)
+{
+ struct device *dev = context;
+ struct i2c_client *i2c = to_i2c_client(dev);
+
+ return i2c_smbus_write_byte_data(i2c, reg, val);
+}
+
+static struct regmap_bus gp2ap002_regmap_bus = {
+ .reg_read = gp2ap002_regmap_i2c_read,
+ .reg_write = gp2ap002_regmap_i2c_write,
+};
+
+static int gp2ap002_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct gp2ap002 *gp2ap002;
+ struct iio_dev *indio_dev;
+ struct device *dev = &client->dev;
+ enum iio_chan_type ch_type;
+ static const struct regmap_config config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = GP2AP002_CON,
+ };
+ struct regmap *regmap;
+ int num_chan;
+ const char *compat;
+ u8 val;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*gp2ap002));
+ if (!indio_dev)
+ return -ENOMEM;
+ i2c_set_clientdata(client, indio_dev);
+
+ gp2ap002 = iio_priv(indio_dev);
+ gp2ap002->dev = dev;
+
+ /*
+ * Check the device compatible like this makes it possible to use
+ * ACPI PRP0001 for registering the sensor using device tree
+ * properties.
+ */
+ ret = device_property_read_string(dev, "compatible", &compat);
+ if (ret) {
+ dev_err(dev, "cannot check compatible\n");
+ return ret;
+ }
+ gp2ap002->is_gp2ap002s00f = !strcmp(compat, "sharp,gp2ap002s00f");
+
+ regmap = devm_regmap_init(dev, &gp2ap002_regmap_bus, dev, &config);
+ if (IS_ERR(regmap)) {
+ dev_err(dev, "Failed to register i2c regmap %d\n",
+ (int)PTR_ERR(regmap));
+ return PTR_ERR(regmap);
+ }
+ gp2ap002->map = regmap;
+
+ /*
+ * The hysteresis settings are coded into the device tree as values
+ * to be written into the hysteresis register. The datasheet defines
+ * modes "A", "B1" and "B2" with fixed values to be use but vendor
+ * code trees for actual devices are tweaking these values and refer to
+ * modes named things like "B1.5". To be able to support any devices,
+ * we allow passing an arbitrary hysteresis setting for "near" and
+ * "far".
+ */
+
+ /* Check the device tree for the IR LED hysteresis */
+ ret = device_property_read_u8(dev, "sharp,proximity-far-hysteresis",
+ &val);
+ if (ret) {
+ dev_err(dev, "failed to obtain proximity far setting\n");
+ return ret;
+ }
+ dev_dbg(dev, "proximity far setting %02x\n", val);
+ gp2ap002->hys_far = val;
+
+ ret = device_property_read_u8(dev, "sharp,proximity-close-hysteresis",
+ &val);
+ if (ret) {
+ dev_err(dev, "failed to obtain proximity close setting\n");
+ return ret;
+ }
+ dev_dbg(dev, "proximity close setting %02x\n", val);
+ gp2ap002->hys_close = val;
+
+ /* The GP2AP002A00F has a light sensor too */
+ if (!gp2ap002->is_gp2ap002s00f) {
+ gp2ap002->alsout = devm_iio_channel_get(dev, "alsout");
+ if (IS_ERR(gp2ap002->alsout)) {
+ if (PTR_ERR(gp2ap002->alsout) == -ENODEV) {
+ dev_err(dev, "no ADC, deferring...\n");
+ return -EPROBE_DEFER;
+ }
+ dev_err(dev, "failed to get ALSOUT ADC channel\n");
+ return PTR_ERR(gp2ap002->alsout);
+ }
+ ret = iio_get_channel_type(gp2ap002->alsout, &ch_type);
+ if (ret < 0)
+ return ret;
+ if (ch_type != IIO_CURRENT) {
+ dev_err(dev,
+ "wrong type of IIO channel specified for ALSOUT\n");
+ return -EINVAL;
+ }
+ }
+
+ gp2ap002->vdd = devm_regulator_get(dev, "vdd");
+ if (IS_ERR(gp2ap002->vdd)) {
+ dev_err(dev, "failed to get VDD regulator\n");
+ return PTR_ERR(gp2ap002->vdd);
+ }
+ gp2ap002->vio = devm_regulator_get(dev, "vio");
+ if (IS_ERR(gp2ap002->vio)) {
+ dev_err(dev, "failed to get VIO regulator\n");
+ return PTR_ERR(gp2ap002->vio);
+ }
+
+ /* Operating voltage 2.4V .. 3.6V according to datasheet */
+ ret = regulator_set_voltage(gp2ap002->vdd, 2400000, 3600000);
+ if (ret) {
+ dev_err(dev, "failed to sett VDD voltage\n");
+ return ret;
+ }
+
+ /* VIO should be between 1.65V and VDD */
+ ret = regulator_get_voltage(gp2ap002->vdd);
+ if (ret < 0) {
+ dev_err(dev, "failed to get VDD voltage\n");
+ return ret;
+ }
+ ret = regulator_set_voltage(gp2ap002->vio, 1650000, ret);
+ if (ret) {
+ dev_err(dev, "failed to set VIO voltage\n");
+ return ret;
+ }
+
+ ret = regulator_enable(gp2ap002->vdd);
+ if (ret) {
+ dev_err(dev, "failed to enable VDD regulator\n");
+ return ret;
+ }
+ ret = regulator_enable(gp2ap002->vio);
+ if (ret) {
+ dev_err(dev, "failed to enable VIO regulator\n");
+ goto out_disable_vdd;
+ }
+
+ msleep(20);
+
+ /*
+ * Initialize the device and signal to runtime PM that now we are
+ * definately up and using power.
+ */
+ ret = gp2ap002_init(gp2ap002);
+ if (ret) {
+ dev_err(dev, "initialization failed\n");
+ goto out_disable_vio;
+ }
+ pm_runtime_get_noresume(dev);
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ gp2ap002->enabled = false;
+
+ ret = devm_request_threaded_irq(dev, client->irq, NULL,
+ gp2ap002_prox_irq, IRQF_ONESHOT,
+ "gp2ap002", indio_dev);
+ if (ret) {
+ dev_err(dev, "unable to request IRQ\n");
+ goto out_disable_vio;
+ }
+ gp2ap002->irq = client->irq;
+
+ /*
+ * As the device takes 20 ms + regulator delay to come up with a fresh
+ * measurement after power-on, do not shut it down unnecessarily.
+ * Set autosuspend to a one second.
+ */
+ pm_runtime_set_autosuspend_delay(dev, 1000);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_put(dev);
+
+ indio_dev->dev.parent = dev;
+ indio_dev->info = &gp2ap002_info;
+ indio_dev->name = "gp2ap002";
+ indio_dev->channels = gp2ap002_channels;
+ /* Skip light channel for the proximity-only sensor */
+ num_chan = ARRAY_SIZE(gp2ap002_channels);
+ if (gp2ap002->is_gp2ap002s00f)
+ num_chan--;
+ indio_dev->num_channels = num_chan;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto out_disable_pm;
+ dev_dbg(dev, "Sharp GP2AP002 probed successfully\n");
+
+ return 0;
+
+out_disable_pm:
+ pm_runtime_put_noidle(dev);
+ pm_runtime_disable(dev);
+out_disable_vio:
+ regulator_disable(gp2ap002->vio);
+out_disable_vdd:
+ regulator_disable(gp2ap002->vdd);
+ return ret;
+}
+
+static int gp2ap002_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
+ struct device *dev = &client->dev;
+
+ pm_runtime_get_sync(dev);
+ pm_runtime_put_noidle(dev);
+ pm_runtime_disable(dev);
+ iio_device_unregister(indio_dev);
+ regulator_disable(gp2ap002->vio);
+ regulator_disable(gp2ap002->vdd);
+
+ return 0;
+}
+
+static int __maybe_unused gp2ap002_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
+ int ret;
+
+ /* Deactivate the IRQ */
+ disable_irq(gp2ap002->irq);
+
+ /* Disable chip and IRQ, everything off */
+ ret = regmap_write(gp2ap002->map, GP2AP002_OPMOD, 0x00);
+ if (ret) {
+ dev_err(gp2ap002->dev, "error setting up operation mode\n");
+ return ret;
+ }
+ /*
+ * As these regulators may be shared, at least we are now in
+ * sleep even if the regulators aren't really turned off.
+ */
+ regulator_disable(gp2ap002->vio);
+ regulator_disable(gp2ap002->vdd);
+
+ return 0;
+}
+
+static int __maybe_unused gp2ap002_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct gp2ap002 *gp2ap002 = iio_priv(indio_dev);
+ int ret;
+
+ ret = regulator_enable(gp2ap002->vdd);
+ if (ret) {
+ dev_err(dev, "failed to enable VDD regulator in resume path\n");
+ return ret;
+ }
+ ret = regulator_enable(gp2ap002->vio);
+ if (ret) {
+ dev_err(dev, "failed to enable VIO regulator in resume path\n");
+ return ret;
+ }
+
+ msleep(20);
+
+ ret = gp2ap002_init(gp2ap002);
+ if (ret) {
+ dev_err(dev, "re-initialization failed\n");
+ return ret;
+ }
+
+ /* Re-activate the IRQ */
+ enable_irq(gp2ap002->irq);
+
+ return 0;
+}
+
+static const struct dev_pm_ops gp2ap002_dev_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(gp2ap002_runtime_suspend,
+ gp2ap002_runtime_resume, NULL)
+};
+
+static const struct i2c_device_id gp2ap002_id_table[] = {
+ { "gp2ap002", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, gp2ap002_id_table);
+
+static const struct of_device_id gp2ap002_of_match[] = {
+ { .compatible = "sharp,gp2ap002a00f" },
+ { .compatible = "sharp,gp2ap002s00f" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, gp2ap002_of_match);
+
+static struct i2c_driver gp2ap002_driver = {
+ .driver = {
+ .name = "gp2ap002",
+ .of_match_table = gp2ap002_of_match,
+ .pm = &gp2ap002_dev_pm_ops,
+ },
+ .probe = gp2ap002_probe,
+ .remove = gp2ap002_remove,
+ .id_table = gp2ap002_id_table,
+};
+module_i2c_driver(gp2ap002_driver);
+
+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
+MODULE_DESCRIPTION("GP2AP002 ambient light and proximity sensor driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/light/gp2ap020a00f.c b/drivers/iio/light/gp2ap020a00f.c
index 4d70c5bf35da..7fbbce0d4bc7 100644
--- a/drivers/iio/light/gp2ap020a00f.c
+++ b/drivers/iio/light/gp2ap020a00f.c
@@ -1390,6 +1390,12 @@ static int gp2ap020a00f_buffer_postenable(struct iio_dev *indio_dev)
mutex_lock(&data->lock);
+ err = iio_triggered_buffer_postenable(indio_dev);
+ if (err < 0) {
+ mutex_unlock(&data->lock);
+ return err;
+ }
+
/*
* Enable triggers according to the scan_mask. Enabling either
* LIGHT_CLEAR or LIGHT_IR scan mode results in enabling ALS
@@ -1420,14 +1426,12 @@ static int gp2ap020a00f_buffer_postenable(struct iio_dev *indio_dev)
goto error_unlock;
data->buffer = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
- if (!data->buffer) {
+ if (!data->buffer)
err = -ENOMEM;
- goto error_unlock;
- }
-
- err = iio_triggered_buffer_postenable(indio_dev);
error_unlock:
+ if (err < 0)
+ iio_triggered_buffer_predisable(indio_dev);
mutex_unlock(&data->lock);
return err;
@@ -1436,14 +1440,10 @@ error_unlock:
static int gp2ap020a00f_buffer_predisable(struct iio_dev *indio_dev)
{
struct gp2ap020a00f_data *data = iio_priv(indio_dev);
- int i, err;
+ int i, err = 0;
mutex_lock(&data->lock);
- err = iio_triggered_buffer_predisable(indio_dev);
- if (err < 0)
- goto error_unlock;
-
for_each_set_bit(i, indio_dev->active_scan_mask,
indio_dev->masklength) {
switch (i) {
@@ -1465,7 +1465,8 @@ static int gp2ap020a00f_buffer_predisable(struct iio_dev *indio_dev)
if (err == 0)
kfree(data->buffer);
-error_unlock:
+ iio_triggered_buffer_predisable(indio_dev);
+
mutex_unlock(&data->lock);
return err;
diff --git a/drivers/iio/light/iqs621-als.c b/drivers/iio/light/iqs621-als.c
new file mode 100644
index 000000000000..b2988a782bd0
--- /dev/null
+++ b/drivers/iio/light/iqs621-als.c
@@ -0,0 +1,617 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Azoteq IQS621/622 Ambient Light Sensors
+ *
+ * Copyright (C) 2019 Jeff LaBundy <jeff@labundy.com>
+ */
+
+#include <linux/device.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/kernel.h>
+#include <linux/mfd/iqs62x.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/notifier.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define IQS621_ALS_FLAGS_LIGHT BIT(7)
+#define IQS621_ALS_FLAGS_RANGE GENMASK(3, 0)
+
+#define IQS621_ALS_UI_OUT 0x17
+
+#define IQS621_ALS_THRESH_DARK 0x80
+#define IQS621_ALS_THRESH_LIGHT 0x81
+
+#define IQS622_IR_RANGE 0x15
+#define IQS622_IR_FLAGS 0x16
+#define IQS622_IR_FLAGS_TOUCH BIT(1)
+#define IQS622_IR_FLAGS_PROX BIT(0)
+
+#define IQS622_IR_UI_OUT 0x17
+
+#define IQS622_IR_THRESH_PROX 0x91
+#define IQS622_IR_THRESH_TOUCH 0x92
+
+struct iqs621_als_private {
+ struct iqs62x_core *iqs62x;
+ struct notifier_block notifier;
+ struct mutex lock;
+ bool light_en;
+ bool range_en;
+ bool prox_en;
+ u8 als_flags;
+ u8 ir_flags_mask;
+ u8 ir_flags;
+ u8 thresh_light;
+ u8 thresh_dark;
+ u8 thresh_prox;
+};
+
+static int iqs621_als_init(struct iqs621_als_private *iqs621_als)
+{
+ struct iqs62x_core *iqs62x = iqs621_als->iqs62x;
+ unsigned int event_mask = 0;
+ int ret;
+
+ switch (iqs621_als->ir_flags_mask) {
+ case IQS622_IR_FLAGS_TOUCH:
+ ret = regmap_write(iqs62x->regmap, IQS622_IR_THRESH_TOUCH,
+ iqs621_als->thresh_prox);
+ break;
+
+ case IQS622_IR_FLAGS_PROX:
+ ret = regmap_write(iqs62x->regmap, IQS622_IR_THRESH_PROX,
+ iqs621_als->thresh_prox);
+ break;
+
+ default:
+ ret = regmap_write(iqs62x->regmap, IQS621_ALS_THRESH_LIGHT,
+ iqs621_als->thresh_light);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(iqs62x->regmap, IQS621_ALS_THRESH_DARK,
+ iqs621_als->thresh_dark);
+ }
+
+ if (ret)
+ return ret;
+
+ if (iqs621_als->light_en || iqs621_als->range_en)
+ event_mask |= iqs62x->dev_desc->als_mask;
+
+ if (iqs621_als->prox_en)
+ event_mask |= iqs62x->dev_desc->ir_mask;
+
+ return regmap_update_bits(iqs62x->regmap, IQS620_GLBL_EVENT_MASK,
+ event_mask, 0);
+}
+
+static int iqs621_als_notifier(struct notifier_block *notifier,
+ unsigned long event_flags, void *context)
+{
+ struct iqs62x_event_data *event_data = context;
+ struct iqs621_als_private *iqs621_als;
+ struct iio_dev *indio_dev;
+ bool light_new, light_old;
+ bool prox_new, prox_old;
+ u8 range_new, range_old;
+ s64 timestamp;
+ int ret;
+
+ iqs621_als = container_of(notifier, struct iqs621_als_private,
+ notifier);
+ indio_dev = iio_priv_to_dev(iqs621_als);
+ timestamp = iio_get_time_ns(indio_dev);
+
+ mutex_lock(&iqs621_als->lock);
+
+ if (event_flags & BIT(IQS62X_EVENT_SYS_RESET)) {
+ ret = iqs621_als_init(iqs621_als);
+ if (ret) {
+ dev_err(indio_dev->dev.parent,
+ "Failed to re-initialize device: %d\n", ret);
+ ret = NOTIFY_BAD;
+ } else {
+ ret = NOTIFY_OK;
+ }
+
+ goto err_mutex;
+ }
+
+ if (!iqs621_als->light_en && !iqs621_als->range_en &&
+ !iqs621_als->prox_en) {
+ ret = NOTIFY_DONE;
+ goto err_mutex;
+ }
+
+ /* IQS621 only */
+ light_new = event_data->als_flags & IQS621_ALS_FLAGS_LIGHT;
+ light_old = iqs621_als->als_flags & IQS621_ALS_FLAGS_LIGHT;
+
+ if (iqs621_als->light_en && light_new && !light_old)
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ timestamp);
+ else if (iqs621_als->light_en && !light_new && light_old)
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_LIGHT, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ timestamp);
+
+ /* IQS621 and IQS622 */
+ range_new = event_data->als_flags & IQS621_ALS_FLAGS_RANGE;
+ range_old = iqs621_als->als_flags & IQS621_ALS_FLAGS_RANGE;
+
+ if (iqs621_als->range_en && (range_new > range_old))
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0,
+ IIO_EV_TYPE_CHANGE,
+ IIO_EV_DIR_RISING),
+ timestamp);
+ else if (iqs621_als->range_en && (range_new < range_old))
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_INTENSITY, 0,
+ IIO_EV_TYPE_CHANGE,
+ IIO_EV_DIR_FALLING),
+ timestamp);
+
+ /* IQS622 only */
+ prox_new = event_data->ir_flags & iqs621_als->ir_flags_mask;
+ prox_old = iqs621_als->ir_flags & iqs621_als->ir_flags_mask;
+
+ if (iqs621_als->prox_en && prox_new && !prox_old)
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING),
+ timestamp);
+ else if (iqs621_als->prox_en && !prox_new && prox_old)
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_PROXIMITY, 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING),
+ timestamp);
+
+ iqs621_als->als_flags = event_data->als_flags;
+ iqs621_als->ir_flags = event_data->ir_flags;
+ ret = NOTIFY_OK;
+
+err_mutex:
+ mutex_unlock(&iqs621_als->lock);
+
+ return ret;
+}
+
+static void iqs621_als_notifier_unregister(void *context)
+{
+ struct iqs621_als_private *iqs621_als = context;
+ struct iio_dev *indio_dev = iio_priv_to_dev(iqs621_als);
+ int ret;
+
+ ret = blocking_notifier_chain_unregister(&iqs621_als->iqs62x->nh,
+ &iqs621_als->notifier);
+ if (ret)
+ dev_err(indio_dev->dev.parent,
+ "Failed to unregister notifier: %d\n", ret);
+}
+
+static int iqs621_als_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct iqs621_als_private *iqs621_als = iio_priv(indio_dev);
+ struct iqs62x_core *iqs62x = iqs621_als->iqs62x;
+ int ret;
+ __le16 val_buf;
+
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ ret = regmap_read(iqs62x->regmap, chan->address, val);
+ if (ret)
+ return ret;
+
+ *val &= IQS621_ALS_FLAGS_RANGE;
+ return IIO_VAL_INT;
+
+ case IIO_PROXIMITY:
+ case IIO_LIGHT:
+ ret = regmap_raw_read(iqs62x->regmap, chan->address, &val_buf,
+ sizeof(val_buf));
+ if (ret)
+ return ret;
+
+ *val = le16_to_cpu(val_buf);
+ return IIO_VAL_INT;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int iqs621_als_read_event_config(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ enum iio_event_type type,
+ enum iio_event_direction dir)
+{
+ struct iqs621_als_private *iqs621_als = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&iqs621_als->lock);
+
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = iqs621_als->light_en;
+ break;
+
+ case IIO_INTENSITY:
+ ret = iqs621_als->range_en;
+ break;
+
+ case IIO_PROXIMITY:
+ ret = iqs621_als->prox_en;
+ break;
+
+ default:
+ ret = -EINVAL;
+ }
+
+ mutex_unlock(&iqs621_als->lock);
+
+ return ret;
+}
+
+static int iqs621_als_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)
+{
+ struct iqs621_als_private *iqs621_als = iio_priv(indio_dev);
+ struct iqs62x_core *iqs62x = iqs621_als->iqs62x;
+ unsigned int val;
+ int ret;
+
+ mutex_lock(&iqs621_als->lock);
+
+ ret = regmap_read(iqs62x->regmap, iqs62x->dev_desc->als_flags, &val);
+ if (ret)
+ goto err_mutex;
+ iqs621_als->als_flags = val;
+
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = regmap_update_bits(iqs62x->regmap, IQS620_GLBL_EVENT_MASK,
+ iqs62x->dev_desc->als_mask,
+ iqs621_als->range_en || state ? 0 :
+ 0xFF);
+ if (!ret)
+ iqs621_als->light_en = state;
+ break;
+
+ case IIO_INTENSITY:
+ ret = regmap_update_bits(iqs62x->regmap, IQS620_GLBL_EVENT_MASK,
+ iqs62x->dev_desc->als_mask,
+ iqs621_als->light_en || state ? 0 :
+ 0xFF);
+ if (!ret)
+ iqs621_als->range_en = state;
+ break;
+
+ case IIO_PROXIMITY:
+ ret = regmap_read(iqs62x->regmap, IQS622_IR_FLAGS, &val);
+ if (ret)
+ goto err_mutex;
+ iqs621_als->ir_flags = val;
+
+ ret = regmap_update_bits(iqs62x->regmap, IQS620_GLBL_EVENT_MASK,
+ iqs62x->dev_desc->ir_mask,
+ state ? 0 : 0xFF);
+ if (!ret)
+ iqs621_als->prox_en = state;
+ break;
+
+ default:
+ ret = -EINVAL;
+ }
+
+err_mutex:
+ mutex_unlock(&iqs621_als->lock);
+
+ return ret;
+}
+
+static int iqs621_als_read_event_value(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)
+{
+ struct iqs621_als_private *iqs621_als = iio_priv(indio_dev);
+ int ret = IIO_VAL_INT;
+
+ mutex_lock(&iqs621_als->lock);
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ *val = iqs621_als->thresh_light * 16;
+ break;
+
+ case IIO_EV_DIR_FALLING:
+ *val = iqs621_als->thresh_dark * 4;
+ break;
+
+ case IIO_EV_DIR_EITHER:
+ if (iqs621_als->ir_flags_mask == IQS622_IR_FLAGS_TOUCH)
+ *val = iqs621_als->thresh_prox * 4;
+ else
+ *val = iqs621_als->thresh_prox;
+ break;
+
+ default:
+ ret = -EINVAL;
+ }
+
+ mutex_unlock(&iqs621_als->lock);
+
+ return ret;
+}
+
+static int iqs621_als_write_event_value(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)
+{
+ struct iqs621_als_private *iqs621_als = iio_priv(indio_dev);
+ struct iqs62x_core *iqs62x = iqs621_als->iqs62x;
+ unsigned int thresh_reg, thresh_val;
+ u8 ir_flags_mask, *thresh_cache;
+ int ret = -EINVAL;
+
+ mutex_lock(&iqs621_als->lock);
+
+ switch (dir) {
+ case IIO_EV_DIR_RISING:
+ thresh_reg = IQS621_ALS_THRESH_LIGHT;
+ thresh_val = val / 16;
+
+ thresh_cache = &iqs621_als->thresh_light;
+ ir_flags_mask = 0;
+ break;
+
+ case IIO_EV_DIR_FALLING:
+ thresh_reg = IQS621_ALS_THRESH_DARK;
+ thresh_val = val / 4;
+
+ thresh_cache = &iqs621_als->thresh_dark;
+ ir_flags_mask = 0;
+ break;
+
+ case IIO_EV_DIR_EITHER:
+ /*
+ * The IQS622 supports two detection thresholds, both measured
+ * in the same arbitrary units reported by read_raw: proximity
+ * (0 through 255 in steps of 1), and touch (0 through 1020 in
+ * steps of 4).
+ *
+ * Based on the single detection threshold chosen by the user,
+ * select the hardware threshold that gives the best trade-off
+ * between range and resolution.
+ *
+ * By default, the close-range (but coarse) touch threshold is
+ * chosen during probe.
+ */
+ switch (val) {
+ case 0 ... 255:
+ thresh_reg = IQS622_IR_THRESH_PROX;
+ thresh_val = val;
+
+ ir_flags_mask = IQS622_IR_FLAGS_PROX;
+ break;
+
+ case 256 ... 1020:
+ thresh_reg = IQS622_IR_THRESH_TOUCH;
+ thresh_val = val / 4;
+
+ ir_flags_mask = IQS622_IR_FLAGS_TOUCH;
+ break;
+
+ default:
+ goto err_mutex;
+ }
+
+ thresh_cache = &iqs621_als->thresh_prox;
+ break;
+
+ default:
+ goto err_mutex;
+ }
+
+ if (thresh_val > 0xFF)
+ goto err_mutex;
+
+ ret = regmap_write(iqs62x->regmap, thresh_reg, thresh_val);
+ if (ret)
+ goto err_mutex;
+
+ *thresh_cache = thresh_val;
+ iqs621_als->ir_flags_mask = ir_flags_mask;
+
+err_mutex:
+ mutex_unlock(&iqs621_als->lock);
+
+ return ret;
+}
+
+static const struct iio_info iqs621_als_info = {
+ .read_raw = &iqs621_als_read_raw,
+ .read_event_config = iqs621_als_read_event_config,
+ .write_event_config = iqs621_als_write_event_config,
+ .read_event_value = iqs621_als_read_event_value,
+ .write_event_value = iqs621_als_write_event_value,
+};
+
+static const struct iio_event_spec iqs621_als_range_events[] = {
+ {
+ .type = IIO_EV_TYPE_CHANGE,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE),
+ },
+};
+
+static const struct iio_event_spec iqs621_als_light_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE),
+ },
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ },
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE),
+ },
+};
+
+static const struct iio_chan_spec iqs621_als_channels[] = {
+ {
+ .type = IIO_INTENSITY,
+ .address = IQS621_ALS_FLAGS,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .event_spec = iqs621_als_range_events,
+ .num_event_specs = ARRAY_SIZE(iqs621_als_range_events),
+ },
+ {
+ .type = IIO_LIGHT,
+ .address = IQS621_ALS_UI_OUT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+ .event_spec = iqs621_als_light_events,
+ .num_event_specs = ARRAY_SIZE(iqs621_als_light_events),
+ },
+};
+
+static const struct iio_event_spec iqs622_als_prox_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE) |
+ BIT(IIO_EV_INFO_VALUE),
+ },
+};
+
+static const struct iio_chan_spec iqs622_als_channels[] = {
+ {
+ .type = IIO_INTENSITY,
+ .channel2 = IIO_MOD_LIGHT_BOTH,
+ .address = IQS622_ALS_FLAGS,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .event_spec = iqs621_als_range_events,
+ .num_event_specs = ARRAY_SIZE(iqs621_als_range_events),
+ .modified = true,
+ },
+ {
+ .type = IIO_INTENSITY,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ .address = IQS622_IR_RANGE,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .modified = true,
+ },
+ {
+ .type = IIO_PROXIMITY,
+ .address = IQS622_IR_UI_OUT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .event_spec = iqs622_als_prox_events,
+ .num_event_specs = ARRAY_SIZE(iqs622_als_prox_events),
+ },
+};
+
+static int iqs621_als_probe(struct platform_device *pdev)
+{
+ struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent);
+ struct iqs621_als_private *iqs621_als;
+ struct iio_dev *indio_dev;
+ unsigned int val;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*iqs621_als));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ iqs621_als = iio_priv(indio_dev);
+ iqs621_als->iqs62x = iqs62x;
+
+ if (iqs62x->dev_desc->prod_num == IQS622_PROD_NUM) {
+ ret = regmap_read(iqs62x->regmap, IQS622_IR_THRESH_TOUCH,
+ &val);
+ if (ret)
+ return ret;
+ iqs621_als->thresh_prox = val;
+ iqs621_als->ir_flags_mask = IQS622_IR_FLAGS_TOUCH;
+
+ indio_dev->channels = iqs622_als_channels;
+ indio_dev->num_channels = ARRAY_SIZE(iqs622_als_channels);
+ } else {
+ ret = regmap_read(iqs62x->regmap, IQS621_ALS_THRESH_LIGHT,
+ &val);
+ if (ret)
+ return ret;
+ iqs621_als->thresh_light = val;
+
+ ret = regmap_read(iqs62x->regmap, IQS621_ALS_THRESH_DARK,
+ &val);
+ if (ret)
+ return ret;
+ iqs621_als->thresh_dark = val;
+
+ indio_dev->channels = iqs621_als_channels;
+ indio_dev->num_channels = ARRAY_SIZE(iqs621_als_channels);
+ }
+
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->name = iqs62x->dev_desc->dev_name;
+ indio_dev->info = &iqs621_als_info;
+
+ mutex_init(&iqs621_als->lock);
+
+ iqs621_als->notifier.notifier_call = iqs621_als_notifier;
+ ret = blocking_notifier_chain_register(&iqs621_als->iqs62x->nh,
+ &iqs621_als->notifier);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register notifier: %d\n", ret);
+ return ret;
+ }
+
+ ret = devm_add_action_or_reset(&pdev->dev,
+ iqs621_als_notifier_unregister,
+ iqs621_als);
+ if (ret)
+ return ret;
+
+ return devm_iio_device_register(&pdev->dev, indio_dev);
+}
+
+static struct platform_driver iqs621_als_platform_driver = {
+ .driver = {
+ .name = "iqs621-als",
+ },
+ .probe = iqs621_als_probe,
+};
+module_platform_driver(iqs621_als_platform_driver);
+
+MODULE_AUTHOR("Jeff LaBundy <jeff@labundy.com>");
+MODULE_DESCRIPTION("Azoteq IQS621/622 Ambient Light Sensors");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:iqs621-als");
diff --git a/drivers/iio/light/si1133.c b/drivers/iio/light/si1133.c
index 015a21f0c2ef..9174ab928880 100644
--- a/drivers/iio/light/si1133.c
+++ b/drivers/iio/light/si1133.c
@@ -102,6 +102,9 @@
#define SI1133_INPUT_FRACTION_LOW 15
#define SI1133_LUX_OUTPUT_FRACTION 12
#define SI1133_LUX_BUFFER_SIZE 9
+#define SI1133_MEASURE_BUFFER_SIZE 3
+
+#define SI1133_SIGN_BIT_INDEX 23
static const int si1133_scale_available[] = {
1, 2, 4, 8, 16, 32, 64, 128};
@@ -234,13 +237,13 @@ static const struct si1133_lux_coeff lux_coeff = {
}
};
-static int si1133_calculate_polynomial_inner(u32 input, u8 fraction, u16 mag,
+static int si1133_calculate_polynomial_inner(s32 input, u8 fraction, u16 mag,
s8 shift)
{
return ((input << fraction) / mag) << shift;
}
-static int si1133_calculate_output(u32 x, u32 y, u8 x_order, u8 y_order,
+static int si1133_calculate_output(s32 x, s32 y, u8 x_order, u8 y_order,
u8 input_fraction, s8 sign,
const struct si1133_coeff *coeffs)
{
@@ -276,7 +279,7 @@ static int si1133_calculate_output(u32 x, u32 y, u8 x_order, u8 y_order,
* The algorithm is from:
* https://siliconlabs.github.io/Gecko_SDK_Doc/efm32zg/html/si1133_8c_source.html#l00716
*/
-static int si1133_calc_polynomial(u32 x, u32 y, u8 input_fraction, u8 num_coeff,
+static int si1133_calc_polynomial(s32 x, s32 y, u8 input_fraction, u8 num_coeff,
const struct si1133_coeff *coeffs)
{
u8 x_order, y_order;
@@ -614,7 +617,7 @@ static int si1133_measure(struct si1133_data *data,
{
int err;
- __be16 resp;
+ u8 buffer[SI1133_MEASURE_BUFFER_SIZE];
err = si1133_set_adcmux(data, 0, chan->channel);
if (err)
@@ -625,12 +628,13 @@ static int si1133_measure(struct si1133_data *data,
if (err)
return err;
- err = si1133_bulk_read(data, SI1133_REG_HOSTOUT(0), sizeof(resp),
- (u8 *)&resp);
+ err = si1133_bulk_read(data, SI1133_REG_HOSTOUT(0), sizeof(buffer),
+ buffer);
if (err)
return err;
- *val = be16_to_cpu(resp);
+ *val = sign_extend32((buffer[0] << 16) | (buffer[1] << 8) | buffer[2],
+ SI1133_SIGN_BIT_INDEX);
return err;
}
@@ -704,9 +708,9 @@ static int si1133_get_lux(struct si1133_data *data, int *val)
{
int err;
int lux;
- u32 high_vis;
- u32 low_vis;
- u32 ir;
+ s32 high_vis;
+ s32 low_vis;
+ s32 ir;
u8 buffer[SI1133_LUX_BUFFER_SIZE];
/* Activate lux channels */
@@ -719,9 +723,16 @@ static int si1133_get_lux(struct si1133_data *data, int *val)
if (err)
return err;
- high_vis = (buffer[0] << 16) | (buffer[1] << 8) | buffer[2];
- low_vis = (buffer[3] << 16) | (buffer[4] << 8) | buffer[5];
- ir = (buffer[6] << 16) | (buffer[7] << 8) | buffer[8];
+ high_vis =
+ sign_extend32((buffer[0] << 16) | (buffer[1] << 8) | buffer[2],
+ SI1133_SIGN_BIT_INDEX);
+
+ low_vis =
+ sign_extend32((buffer[3] << 16) | (buffer[4] << 8) | buffer[5],
+ SI1133_SIGN_BIT_INDEX);
+
+ ir = sign_extend32((buffer[6] << 16) | (buffer[7] << 8) | buffer[8],
+ SI1133_SIGN_BIT_INDEX);
if (high_vis > SI1133_ADC_THRESHOLD || ir > SI1133_ADC_THRESHOLD)
lux = si1133_calc_polynomial(high_vis, ir,
diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
index e5b00a6611ac..ec803c1e81df 100644
--- a/drivers/iio/light/vcnl4000.c
+++ b/drivers/iio/light/vcnl4000.c
@@ -22,6 +22,7 @@
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/delay.h>
+#include <linux/pm_runtime.h>
#include <linux/iio/iio.h>
#include <linux/iio/sysfs.h>
@@ -57,6 +58,8 @@
#define VCNL4000_AL_OD BIT(4) /* start on-demand ALS measurement */
#define VCNL4000_PS_OD BIT(3) /* start on-demand proximity measurement */
+#define VCNL4000_SLEEP_DELAY_MS 2000 /* before we enter pm_runtime_suspend */
+
enum vcnl4000_device_ids {
VCNL4000,
VCNL4010,
@@ -87,6 +90,7 @@ struct vcnl4000_chip_spec {
int (*init)(struct vcnl4000_data *data);
int (*measure_light)(struct vcnl4000_data *data, int *val);
int (*measure_proximity)(struct vcnl4000_data *data, int *val);
+ int (*set_power_state)(struct vcnl4000_data *data, bool on);
};
static const struct i2c_device_id vcnl4000_id[] = {
@@ -99,6 +103,12 @@ static const struct i2c_device_id vcnl4000_id[] = {
};
MODULE_DEVICE_TABLE(i2c, vcnl4000_id);
+static int vcnl4000_set_power_state(struct vcnl4000_data *data, bool on)
+{
+ /* no suspend op */
+ return 0;
+}
+
static int vcnl4000_init(struct vcnl4000_data *data)
{
int ret, prod_id;
@@ -127,9 +137,31 @@ static int vcnl4000_init(struct vcnl4000_data *data)
data->al_scale = 250000;
mutex_init(&data->vcnl4000_lock);
- return 0;
+ return data->chip_spec->set_power_state(data, true);
};
+static int vcnl4200_set_power_state(struct vcnl4000_data *data, bool on)
+{
+ u16 val = on ? 0 /* power on */ : 1 /* shut down */;
+ int ret;
+
+ ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF, val);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, val);
+ if (ret < 0)
+ return ret;
+
+ if (on) {
+ /* Wait at least one integration cycle before fetching data */
+ data->vcnl4200_al.last_measurement = ktime_get();
+ data->vcnl4200_ps.last_measurement = ktime_get();
+ }
+
+ return 0;
+}
+
static int vcnl4200_init(struct vcnl4000_data *data)
{
int ret, id;
@@ -155,14 +187,6 @@ static int vcnl4200_init(struct vcnl4000_data *data)
data->rev = (ret >> 8) & 0xf;
- /* Set defaults and enable both channels */
- ret = i2c_smbus_write_word_data(data->client, VCNL4200_AL_CONF, 0);
- if (ret < 0)
- return ret;
- ret = i2c_smbus_write_word_data(data->client, VCNL4200_PS_CONF1, 0);
- if (ret < 0)
- return ret;
-
data->vcnl4200_al.reg = VCNL4200_AL_DATA;
data->vcnl4200_ps.reg = VCNL4200_PS_DATA;
switch (id) {
@@ -181,11 +205,13 @@ static int vcnl4200_init(struct vcnl4000_data *data)
data->al_scale = 120000;
break;
}
- data->vcnl4200_al.last_measurement = ktime_set(0, 0);
- data->vcnl4200_ps.last_measurement = ktime_set(0, 0);
mutex_init(&data->vcnl4200_al.lock);
mutex_init(&data->vcnl4200_ps.lock);
+ ret = data->chip_spec->set_power_state(data, true);
+ if (ret < 0)
+ return ret;
+
return 0;
};
@@ -292,24 +318,28 @@ static const struct vcnl4000_chip_spec vcnl4000_chip_spec_cfg[] = {
.init = vcnl4000_init,
.measure_light = vcnl4000_measure_light,
.measure_proximity = vcnl4000_measure_proximity,
+ .set_power_state = vcnl4000_set_power_state,
},
[VCNL4010] = {
.prod = "VCNL4010/4020",
.init = vcnl4000_init,
.measure_light = vcnl4000_measure_light,
.measure_proximity = vcnl4000_measure_proximity,
+ .set_power_state = vcnl4000_set_power_state,
},
[VCNL4040] = {
.prod = "VCNL4040",
.init = vcnl4200_init,
.measure_light = vcnl4200_measure_light,
.measure_proximity = vcnl4200_measure_proximity,
+ .set_power_state = vcnl4200_set_power_state,
},
[VCNL4200] = {
.prod = "VCNL4200",
.init = vcnl4200_init,
.measure_light = vcnl4200_measure_light,
.measure_proximity = vcnl4200_measure_proximity,
+ .set_power_state = vcnl4200_set_power_state,
},
};
@@ -324,6 +354,23 @@ static const struct iio_chan_spec vcnl4000_channels[] = {
}
};
+static int vcnl4000_set_pm_runtime_state(struct vcnl4000_data *data, bool on)
+{
+ struct device *dev = &data->client->dev;
+ int ret;
+
+ if (on) {
+ ret = pm_runtime_get_sync(dev);
+ if (ret < 0)
+ pm_runtime_put_noidle(dev);
+ } else {
+ pm_runtime_mark_last_busy(dev);
+ ret = pm_runtime_put_autosuspend(dev);
+ }
+
+ return ret;
+}
+
static int vcnl4000_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2, long mask)
@@ -333,20 +380,26 @@ static int vcnl4000_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_RAW:
+ ret = vcnl4000_set_pm_runtime_state(data, true);
+ if (ret < 0)
+ return ret;
+
switch (chan->type) {
case IIO_LIGHT:
ret = data->chip_spec->measure_light(data, val);
- if (ret < 0)
- return ret;
- return IIO_VAL_INT;
+ if (!ret)
+ ret = IIO_VAL_INT;
+ break;
case IIO_PROXIMITY:
ret = data->chip_spec->measure_proximity(data, val);
- if (ret < 0)
- return ret;
- return IIO_VAL_INT;
+ if (!ret)
+ ret = IIO_VAL_INT;
+ break;
default:
- return -EINVAL;
+ ret = -EINVAL;
}
+ vcnl4000_set_pm_runtime_state(data, false);
+ return ret;
case IIO_CHAN_INFO_SCALE:
if (chan->type != IIO_LIGHT)
return -EINVAL;
@@ -394,7 +447,22 @@ static int vcnl4000_probe(struct i2c_client *client,
indio_dev->name = VCNL4000_DRV_NAME;
indio_dev->modes = INDIO_DIRECT_MODE;
- return devm_iio_device_register(&client->dev, indio_dev);
+ ret = pm_runtime_set_active(&client->dev);
+ if (ret < 0)
+ goto fail_poweroff;
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto fail_poweroff;
+
+ pm_runtime_enable(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev, VCNL4000_SLEEP_DELAY_MS);
+ pm_runtime_use_autosuspend(&client->dev);
+
+ return 0;
+fail_poweroff:
+ data->chip_spec->set_power_state(data, false);
+ return ret;
}
static const struct of_device_id vcnl_4000_of_match[] = {
@@ -422,13 +490,51 @@ static const struct of_device_id vcnl_4000_of_match[] = {
};
MODULE_DEVICE_TABLE(of, vcnl_4000_of_match);
+static int vcnl4000_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ pm_runtime_dont_use_autosuspend(&client->dev);
+ pm_runtime_disable(&client->dev);
+ iio_device_unregister(indio_dev);
+ pm_runtime_set_suspended(&client->dev);
+
+ return data->chip_spec->set_power_state(data, false);
+}
+
+static int __maybe_unused vcnl4000_runtime_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ return data->chip_spec->set_power_state(data, false);
+}
+
+static int __maybe_unused vcnl4000_runtime_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ return data->chip_spec->set_power_state(data, true);
+}
+
+static const struct dev_pm_ops vcnl4000_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(vcnl4000_runtime_suspend,
+ vcnl4000_runtime_resume, NULL)
+};
+
static struct i2c_driver vcnl4000_driver = {
.driver = {
.name = VCNL4000_DRV_NAME,
+ .pm = &vcnl4000_pm_ops,
.of_match_table = vcnl_4000_of_match,
},
.probe = vcnl4000_probe,
.id_table = vcnl4000_id,
+ .remove = vcnl4000_remove,
};
module_i2c_driver(vcnl4000_driver);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.