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path: root/drivers/iio/light
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-rw-r--r--drivers/iio/light/Kconfig26
-rw-r--r--drivers/iio/light/Makefile2
-rw-r--r--drivers/iio/light/adjd_s311.c3
-rw-r--r--drivers/iio/light/hid-sensor-prox.c375
-rw-r--r--drivers/iio/light/ltr501.c445
-rw-r--r--drivers/iio/light/tcs3472.c2
6 files changed, 848 insertions, 5 deletions
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index d12b2a0dbfbc..c89740d4748f 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -73,6 +73,20 @@ config HID_SENSOR_ALS
Say yes here to build support for the HID SENSOR
Ambient light sensor.
+config HID_SENSOR_PROX
+ depends on HID_SENSOR_HUB
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select HID_SENSOR_IIO_COMMON
+ select HID_SENSOR_IIO_TRIGGER
+ tristate "HID PROX"
+ help
+ Say yes here to build support for the HID SENSOR
+ Proximity sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called hid-sensor-prox.
+
config SENSORS_LM3533
tristate "LM3533 ambient light sensor"
depends on MFD_LM3533
@@ -90,6 +104,18 @@ config SENSORS_LM3533
changes. The ALS-control output values can be set per zone for the
three current output channels.
+config LTR501
+ tristate "LTR-501ALS-01 light sensor"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ If you say yes here you get support for the Lite-On LTR-501ALS-01
+ ambient light and proximity sensor.
+
+ This driver can also be built as a module. If so, the module
+ will be called ltr501.
+
config TCS3472
tristate "TAOS TCS3472 color light-to-digital converter"
depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index 60e35ac07ff0..3eb36e5151fa 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -9,7 +9,9 @@ obj-$(CONFIG_CM32181) += cm32181.o
obj-$(CONFIG_CM36651) += cm36651.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_SENSORS_LM3533) += lm3533-als.o
+obj-$(CONFIG_LTR501) += ltr501.o
obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o
obj-$(CONFIG_TCS3472) += tcs3472.o
obj-$(CONFIG_TSL4531) += tsl4531.o
diff --git a/drivers/iio/light/adjd_s311.c b/drivers/iio/light/adjd_s311.c
index f3068477b466..09ad5f1ce539 100644
--- a/drivers/iio/light/adjd_s311.c
+++ b/drivers/iio/light/adjd_s311.c
@@ -14,7 +14,6 @@
*/
#include <linux/module.h>
-#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/slab.h>
@@ -120,7 +119,6 @@ static irqreturn_t adjd_s311_trigger_handler(int irq, void *p)
struct iio_dev *indio_dev = pf->indio_dev;
struct adjd_s311_data *data = iio_priv(indio_dev);
s64 time_ns = iio_get_time_ns();
- int len = 0;
int i, j = 0;
int ret = adjd_s311_req_data(indio_dev);
@@ -135,7 +133,6 @@ static irqreturn_t adjd_s311_trigger_handler(int irq, void *p)
goto done;
data->buffer[j++] = ret & ADJD_S311_DATA_MASK;
- len += 2;
}
iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, time_ns);
diff --git a/drivers/iio/light/hid-sensor-prox.c b/drivers/iio/light/hid-sensor-prox.c
new file mode 100644
index 000000000000..1894ab196f97
--- /dev/null
+++ b/drivers/iio/light/hid-sensor-prox.c
@@ -0,0 +1,375 @@
+/*
+ * HID Sensors Driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ *
+ */
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/slab.h>
+#include <linux/hid-sensor-hub.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include "../common/hid-sensors/hid-sensor-trigger.h"
+
+#define CHANNEL_SCAN_INDEX_PRESENCE 0
+
+struct prox_state {
+ struct hid_sensor_hub_callbacks callbacks;
+ struct hid_sensor_common common_attributes;
+ struct hid_sensor_hub_attribute_info prox_attr;
+ u32 human_presence;
+};
+
+/* Channel definitions */
+static const struct iio_chan_spec prox_channels[] = {
+ {
+ .type = IIO_PROXIMITY,
+ .modified = 1,
+ .channel2 = IIO_NO_MOD,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
+ BIT(IIO_CHAN_INFO_SCALE) |
+ BIT(IIO_CHAN_INFO_SAMP_FREQ) |
+ BIT(IIO_CHAN_INFO_HYSTERESIS),
+ .scan_index = CHANNEL_SCAN_INDEX_PRESENCE,
+ }
+};
+
+/* Adjust channel real bits based on report descriptor */
+static void prox_adjust_channel_bit_mask(struct iio_chan_spec *channels,
+ int channel, int size)
+{
+ channels[channel].scan_type.sign = 's';
+ /* Real storage bits will change based on the report desc. */
+ channels[channel].scan_type.realbits = size * 8;
+ /* Maximum size of a sample to capture is u32 */
+ channels[channel].scan_type.storagebits = sizeof(u32) * 8;
+}
+
+/* Channel read_raw handler */
+static int prox_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2,
+ long mask)
+{
+ struct prox_state *prox_state = iio_priv(indio_dev);
+ int report_id = -1;
+ u32 address;
+ int ret;
+ int ret_type;
+
+ *val = 0;
+ *val2 = 0;
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->scan_index) {
+ case CHANNEL_SCAN_INDEX_PRESENCE:
+ report_id = prox_state->prox_attr.report_id;
+ address =
+ HID_USAGE_SENSOR_HUMAN_PRESENCE;
+ break;
+ default:
+ report_id = -1;
+ break;
+ }
+ if (report_id >= 0)
+ *val = sensor_hub_input_attr_get_raw_value(
+ prox_state->common_attributes.hsdev,
+ HID_USAGE_SENSOR_PROX, address,
+ report_id);
+ else {
+ *val = 0;
+ return -EINVAL;
+ }
+ ret_type = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ *val = prox_state->prox_attr.units;
+ ret_type = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_OFFSET:
+ *val = hid_sensor_convert_exponent(
+ prox_state->prox_attr.unit_expo);
+ ret_type = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = hid_sensor_read_samp_freq_value(
+ &prox_state->common_attributes, val, val2);
+ ret_type = IIO_VAL_INT_PLUS_MICRO;
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret = hid_sensor_read_raw_hyst_value(
+ &prox_state->common_attributes, val, val2);
+ ret_type = IIO_VAL_INT_PLUS_MICRO;
+ break;
+ default:
+ ret_type = -EINVAL;
+ break;
+ }
+
+ return ret_type;
+}
+
+/* Channel write_raw handler */
+static int prox_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct prox_state *prox_state = iio_priv(indio_dev);
+ int ret = 0;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ ret = hid_sensor_write_samp_freq_value(
+ &prox_state->common_attributes, val, val2);
+ break;
+ case IIO_CHAN_INFO_HYSTERESIS:
+ ret = hid_sensor_write_raw_hyst_value(
+ &prox_state->common_attributes, val, val2);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static const struct iio_info prox_info = {
+ .driver_module = THIS_MODULE,
+ .read_raw = &prox_read_raw,
+ .write_raw = &prox_write_raw,
+};
+
+/* Function to push data to buffer */
+static void hid_sensor_push_data(struct iio_dev *indio_dev, const void *data,
+ int len)
+{
+ dev_dbg(&indio_dev->dev, "hid_sensor_push_data\n");
+ iio_push_to_buffers(indio_dev, data);
+}
+
+/* Callback handler to send event after all samples are received and captured */
+static int prox_proc_event(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct prox_state *prox_state = iio_priv(indio_dev);
+
+ dev_dbg(&indio_dev->dev, "prox_proc_event [%d]\n",
+ prox_state->common_attributes.data_ready);
+ if (prox_state->common_attributes.data_ready)
+ hid_sensor_push_data(indio_dev,
+ &prox_state->human_presence,
+ sizeof(prox_state->human_presence));
+
+ return 0;
+}
+
+/* Capture samples in local storage */
+static int prox_capture_sample(struct hid_sensor_hub_device *hsdev,
+ unsigned usage_id,
+ size_t raw_len, char *raw_data,
+ void *priv)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(priv);
+ struct prox_state *prox_state = iio_priv(indio_dev);
+ int ret = -EINVAL;
+
+ switch (usage_id) {
+ case HID_USAGE_SENSOR_HUMAN_PRESENCE:
+ prox_state->human_presence = *(u32 *)raw_data;
+ ret = 0;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+/* Parse report which is specific to an usage id*/
+static int prox_parse_report(struct platform_device *pdev,
+ struct hid_sensor_hub_device *hsdev,
+ struct iio_chan_spec *channels,
+ unsigned usage_id,
+ struct prox_state *st)
+{
+ int ret;
+
+ ret = sensor_hub_input_get_attribute_info(hsdev, HID_INPUT_REPORT,
+ usage_id,
+ HID_USAGE_SENSOR_HUMAN_PRESENCE,
+ &st->prox_attr);
+ if (ret < 0)
+ return ret;
+ prox_adjust_channel_bit_mask(channels, CHANNEL_SCAN_INDEX_PRESENCE,
+ st->prox_attr.size);
+
+ dev_dbg(&pdev->dev, "prox %x:%x\n", st->prox_attr.index,
+ st->prox_attr.report_id);
+
+ /* Set Sensitivity field ids, when there is no individual modifier */
+ if (st->common_attributes.sensitivity.index < 0) {
+ sensor_hub_input_get_attribute_info(hsdev,
+ HID_FEATURE_REPORT, usage_id,
+ HID_USAGE_SENSOR_DATA_MOD_CHANGE_SENSITIVITY_ABS |
+ HID_USAGE_SENSOR_DATA_PRESENCE,
+ &st->common_attributes.sensitivity);
+ dev_dbg(&pdev->dev, "Sensitivity index:report %d:%d\n",
+ st->common_attributes.sensitivity.index,
+ st->common_attributes.sensitivity.report_id);
+ }
+ return ret;
+}
+
+/* Function to initialize the processing for usage id */
+static int hid_prox_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ static const char *name = "prox";
+ struct iio_dev *indio_dev;
+ struct prox_state *prox_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 prox_state));
+ if (!indio_dev)
+ return -ENOMEM;
+ platform_set_drvdata(pdev, indio_dev);
+
+ prox_state = iio_priv(indio_dev);
+ prox_state->common_attributes.hsdev = hsdev;
+ prox_state->common_attributes.pdev = pdev;
+
+ ret = hid_sensor_parse_common_attributes(hsdev, HID_USAGE_SENSOR_PROX,
+ &prox_state->common_attributes);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to setup common attributes\n");
+ return ret;
+ }
+
+ channels = kmemdup(prox_channels, sizeof(prox_channels), GFP_KERNEL);
+ if (!channels) {
+ dev_err(&pdev->dev, "failed to duplicate channels\n");
+ return -ENOMEM;
+ }
+
+ ret = prox_parse_report(pdev, hsdev, channels,
+ HID_USAGE_SENSOR_PROX, prox_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(prox_channels);
+ indio_dev->dev.parent = &pdev->dev;
+ indio_dev->info = &prox_info;
+ indio_dev->name = name;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time,
+ NULL, NULL);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to initialize trigger buffer\n");
+ goto error_free_dev_mem;
+ }
+ prox_state->common_attributes.data_ready = false;
+ ret = hid_sensor_setup_trigger(indio_dev, name,
+ &prox_state->common_attributes);
+ if (ret) {
+ dev_err(&pdev->dev, "trigger setup failed\n");
+ goto error_unreg_buffer_funcs;
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "device register failed\n");
+ goto error_remove_trigger;
+ }
+
+ prox_state->callbacks.send_event = prox_proc_event;
+ prox_state->callbacks.capture_sample = prox_capture_sample;
+ prox_state->callbacks.pdev = pdev;
+ ret = sensor_hub_register_callback(hsdev, HID_USAGE_SENSOR_PROX,
+ &prox_state->callbacks);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "callback reg failed\n");
+ goto error_iio_unreg;
+ }
+
+ return ret;
+
+error_iio_unreg:
+ iio_device_unregister(indio_dev);
+error_remove_trigger:
+ hid_sensor_remove_trigger(&prox_state->common_attributes);
+error_unreg_buffer_funcs:
+ iio_triggered_buffer_cleanup(indio_dev);
+error_free_dev_mem:
+ kfree(indio_dev->channels);
+ return ret;
+}
+
+/* Function to deinitialize the processing for usage id */
+static int hid_prox_remove(struct platform_device *pdev)
+{
+ struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct prox_state *prox_state = iio_priv(indio_dev);
+
+ sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_PROX);
+ iio_device_unregister(indio_dev);
+ hid_sensor_remove_trigger(&prox_state->common_attributes);
+ iio_triggered_buffer_cleanup(indio_dev);
+ kfree(indio_dev->channels);
+
+ return 0;
+}
+
+static struct platform_device_id hid_prox_ids[] = {
+ {
+ /* Format: HID-SENSOR-usage_id_in_hex_lowercase */
+ .name = "HID-SENSOR-200011",
+ },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(platform, hid_prox_ids);
+
+static struct platform_driver hid_prox_platform_driver = {
+ .id_table = hid_prox_ids,
+ .driver = {
+ .name = KBUILD_MODNAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = hid_prox_probe,
+ .remove = hid_prox_remove,
+};
+module_platform_driver(hid_prox_platform_driver);
+
+MODULE_DESCRIPTION("HID Sensor Proximity");
+MODULE_AUTHOR("Archana Patni <archana.patni@intel.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/ltr501.c b/drivers/iio/light/ltr501.c
new file mode 100644
index 000000000000..62b7072af4de
--- /dev/null
+++ b/drivers/iio/light/ltr501.c
@@ -0,0 +1,445 @@
+/*
+ * ltr501.c - Support for Lite-On LTR501 ambient light and proximity sensor
+ *
+ * Copyright 2014 Peter Meerwald <pmeerw@pmeerw.net>
+ *
+ * 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.
+ *
+ * 7-bit I2C slave address 0x23
+ *
+ * TODO: interrupt, threshold, measurement rate, IR LED characteristics
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define LTR501_DRV_NAME "ltr501"
+
+#define LTR501_ALS_CONTR 0x80 /* ALS operation mode, SW reset */
+#define LTR501_PS_CONTR 0x81 /* PS operation mode */
+#define LTR501_PART_ID 0x86
+#define LTR501_MANUFAC_ID 0x87
+#define LTR501_ALS_DATA1 0x88 /* 16-bit, little endian */
+#define LTR501_ALS_DATA0 0x8a /* 16-bit, little endian */
+#define LTR501_ALS_PS_STATUS 0x8c
+#define LTR501_PS_DATA 0x8d /* 16-bit, little endian */
+
+#define LTR501_ALS_CONTR_SW_RESET BIT(2)
+#define LTR501_CONTR_PS_GAIN_MASK (BIT(3) | BIT(2))
+#define LTR501_CONTR_PS_GAIN_SHIFT 2
+#define LTR501_CONTR_ALS_GAIN_MASK BIT(3)
+#define LTR501_CONTR_ACTIVE BIT(1)
+
+#define LTR501_STATUS_ALS_RDY BIT(2)
+#define LTR501_STATUS_PS_RDY BIT(0)
+
+#define LTR501_PS_DATA_MASK 0x7ff
+
+struct ltr501_data {
+ struct i2c_client *client;
+ struct mutex lock_als, lock_ps;
+ u8 als_contr, ps_contr;
+};
+
+static int ltr501_drdy(struct ltr501_data *data, u8 drdy_mask)
+{
+ int tries = 100;
+ int ret;
+
+ while (tries--) {
+ ret = i2c_smbus_read_byte_data(data->client,
+ LTR501_ALS_PS_STATUS);
+ if (ret < 0)
+ return ret;
+ if ((ret & drdy_mask) == drdy_mask)
+ return 0;
+ msleep(25);
+ }
+
+ dev_err(&data->client->dev, "ltr501_drdy() failed, data not ready\n");
+ return -EIO;
+}
+
+static int ltr501_read_als(struct ltr501_data *data, __le16 buf[2])
+{
+ int ret = ltr501_drdy(data, LTR501_STATUS_ALS_RDY);
+ if (ret < 0)
+ return ret;
+ /* always read both ALS channels in given order */
+ return i2c_smbus_read_i2c_block_data(data->client,
+ LTR501_ALS_DATA1, 2 * sizeof(__le16), (u8 *) buf);
+}
+
+static int ltr501_read_ps(struct ltr501_data *data)
+{
+ int ret = ltr501_drdy(data, LTR501_STATUS_PS_RDY);
+ if (ret < 0)
+ return ret;
+ return i2c_smbus_read_word_data(data->client, LTR501_PS_DATA);
+}
+
+#define LTR501_INTENSITY_CHANNEL(_idx, _addr, _mod, _shared) { \
+ .type = IIO_INTENSITY, \
+ .modified = 1, \
+ .address = (_addr), \
+ .channel2 = (_mod), \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = (_shared), \
+ .scan_index = (_idx), \
+ .scan_type = { \
+ .sign = 'u', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_CPU, \
+ } \
+}
+
+static const struct iio_chan_spec ltr501_channels[] = {
+ LTR501_INTENSITY_CHANNEL(0, LTR501_ALS_DATA0, IIO_MOD_LIGHT_BOTH, 0),
+ LTR501_INTENSITY_CHANNEL(1, LTR501_ALS_DATA1, IIO_MOD_LIGHT_IR,
+ BIT(IIO_CHAN_INFO_SCALE)),
+ {
+ .type = IIO_PROXIMITY,
+ .address = LTR501_PS_DATA,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+ BIT(IIO_CHAN_INFO_SCALE),
+ .scan_index = 2,
+ .scan_type = {
+ .sign = 'u',
+ .realbits = 11,
+ .storagebits = 16,
+ .endianness = IIO_CPU,
+ },
+ },
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const int ltr501_ps_gain[4][2] = {
+ {1, 0}, {0, 250000}, {0, 125000}, {0, 62500}
+};
+
+static int ltr501_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct ltr501_data *data = iio_priv(indio_dev);
+ __le16 buf[2];
+ int ret, i;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (iio_buffer_enabled(indio_dev))
+ return -EBUSY;
+
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ mutex_lock(&data->lock_als);
+ ret = ltr501_read_als(data, buf);
+ mutex_unlock(&data->lock_als);
+ if (ret < 0)
+ return ret;
+ *val = le16_to_cpu(chan->address == LTR501_ALS_DATA1 ?
+ buf[0] : buf[1]);
+ return IIO_VAL_INT;
+ case IIO_PROXIMITY:
+ mutex_lock(&data->lock_ps);
+ ret = ltr501_read_ps(data);
+ mutex_unlock(&data->lock_ps);
+ if (ret < 0)
+ return ret;
+ *val = ret & LTR501_PS_DATA_MASK;
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ if (data->als_contr & LTR501_CONTR_ALS_GAIN_MASK) {
+ *val = 0;
+ *val2 = 5000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ } else {
+ *val = 1;
+ *val2 = 0;
+ return IIO_VAL_INT;
+ }
+ case IIO_PROXIMITY:
+ i = (data->ps_contr & LTR501_CONTR_PS_GAIN_MASK) >>
+ LTR501_CONTR_PS_GAIN_SHIFT;
+ *val = ltr501_ps_gain[i][0];
+ *val2 = ltr501_ps_gain[i][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+ }
+ return -EINVAL;
+}
+
+static int ltr501_get_ps_gain_index(int val, int val2)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ltr501_ps_gain); i++)
+ if (val == ltr501_ps_gain[i][0] && val2 == ltr501_ps_gain[i][1])
+ return i;
+
+ return -1;
+}
+
+static int ltr501_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct ltr501_data *data = iio_priv(indio_dev);
+ int i;
+
+ if (iio_buffer_enabled(indio_dev))
+ return -EBUSY;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ if (val == 0 && val2 == 5000)
+ data->als_contr |= LTR501_CONTR_ALS_GAIN_MASK;
+ else if (val == 1 && val2 == 0)
+ data->als_contr &= ~LTR501_CONTR_ALS_GAIN_MASK;
+ else
+ return -EINVAL;
+ return i2c_smbus_write_byte_data(data->client,
+ LTR501_ALS_CONTR, data->als_contr);
+ case IIO_PROXIMITY:
+ i = ltr501_get_ps_gain_index(val, val2);
+ if (i < 0)
+ return -EINVAL;
+ data->ps_contr &= ~LTR501_CONTR_PS_GAIN_MASK;
+ data->ps_contr |= i << LTR501_CONTR_PS_GAIN_SHIFT;
+ return i2c_smbus_write_byte_data(data->client,
+ LTR501_PS_CONTR, data->ps_contr);
+ default:
+ return -EINVAL;
+ }
+ }
+ return -EINVAL;
+}
+
+static IIO_CONST_ATTR(in_proximity_scale_available, "1 0.25 0.125 0.0625");
+static IIO_CONST_ATTR(in_intensity_scale_available, "1 0.005");
+
+static struct attribute *ltr501_attributes[] = {
+ &iio_const_attr_in_proximity_scale_available.dev_attr.attr,
+ &iio_const_attr_in_intensity_scale_available.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group ltr501_attribute_group = {
+ .attrs = ltr501_attributes,
+};
+
+static const struct iio_info ltr501_info = {
+ .read_raw = ltr501_read_raw,
+ .write_raw = ltr501_write_raw,
+ .attrs = &ltr501_attribute_group,
+ .driver_module = THIS_MODULE,
+};
+
+static int ltr501_write_contr(struct i2c_client *client, u8 als_val, u8 ps_val)
+{
+ int ret = i2c_smbus_write_byte_data(client, LTR501_ALS_CONTR, als_val);
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_write_byte_data(client, LTR501_PS_CONTR, ps_val);
+}
+
+static irqreturn_t ltr501_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct ltr501_data *data = iio_priv(indio_dev);
+ u16 buf[8];
+ __le16 als_buf[2];
+ u8 mask = 0;
+ int j = 0;
+ int ret;
+
+ memset(buf, 0, sizeof(buf));
+
+ /* figure out which data needs to be ready */
+ if (test_bit(0, indio_dev->active_scan_mask) ||
+ test_bit(1, indio_dev->active_scan_mask))
+ mask |= LTR501_STATUS_ALS_RDY;
+ if (test_bit(2, indio_dev->active_scan_mask))
+ mask |= LTR501_STATUS_PS_RDY;
+
+ ret = ltr501_drdy(data, mask);
+ if (ret < 0)
+ goto done;
+
+ if (mask & LTR501_STATUS_ALS_RDY) {
+ ret = i2c_smbus_read_i2c_block_data(data->client,
+ LTR501_ALS_DATA1, sizeof(als_buf), (u8 *) als_buf);
+ if (ret < 0)
+ return ret;
+ if (test_bit(0, indio_dev->active_scan_mask))
+ buf[j++] = le16_to_cpu(als_buf[1]);
+ if (test_bit(1, indio_dev->active_scan_mask))
+ buf[j++] = le16_to_cpu(als_buf[0]);
+ }
+
+ if (mask & LTR501_STATUS_PS_RDY) {
+ ret = i2c_smbus_read_word_data(data->client, LTR501_PS_DATA);
+ if (ret < 0)
+ goto done;
+ buf[j++] = ret & LTR501_PS_DATA_MASK;
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, buf,
+ iio_get_time_ns());
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int ltr501_init(struct ltr501_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, LTR501_ALS_CONTR);
+ if (ret < 0)
+ return ret;
+ data->als_contr = ret | LTR501_CONTR_ACTIVE;
+
+ ret = i2c_smbus_read_byte_data(data->client, LTR501_PS_CONTR);
+ if (ret < 0)
+ return ret;
+ data->ps_contr = ret | LTR501_CONTR_ACTIVE;
+
+ return ltr501_write_contr(data->client, data->als_contr,
+ data->ps_contr);
+}
+
+static int ltr501_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct ltr501_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;
+ mutex_init(&data->lock_als);
+ mutex_init(&data->lock_ps);
+
+ ret = i2c_smbus_read_byte_data(data->client, LTR501_PART_ID);
+ if (ret < 0)
+ return ret;
+ if ((ret >> 4) != 0x8)
+ return -ENODEV;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &ltr501_info;
+ indio_dev->channels = ltr501_channels;
+ indio_dev->num_channels = ARRAY_SIZE(ltr501_channels);
+ indio_dev->name = LTR501_DRV_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = ltr501_init(data);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ ltr501_trigger_handler, NULL);
+ if (ret)
+ return ret;
+
+ ret = iio_device_register(indio_dev);
+ if (ret)
+ goto error_unreg_buffer;
+
+ return 0;
+
+error_unreg_buffer:
+ iio_triggered_buffer_cleanup(indio_dev);
+ return ret;
+}
+
+static int ltr501_powerdown(struct ltr501_data *data)
+{
+ return ltr501_write_contr(data->client,
+ data->als_contr & ~LTR501_CONTR_ACTIVE,
+ data->ps_contr & ~LTR501_CONTR_ACTIVE);
+}
+
+static int ltr501_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ ltr501_powerdown(iio_priv(indio_dev));
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int ltr501_suspend(struct device *dev)
+{
+ struct ltr501_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+ return ltr501_powerdown(data);
+}
+
+static int ltr501_resume(struct device *dev)
+{
+ struct ltr501_data *data = iio_priv(i2c_get_clientdata(
+ to_i2c_client(dev)));
+
+ return ltr501_write_contr(data->client, data->als_contr,
+ data->ps_contr);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(ltr501_pm_ops, ltr501_suspend, ltr501_resume);
+
+static const struct i2c_device_id ltr501_id[] = {
+ { "ltr501", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ltr501_id);
+
+static struct i2c_driver ltr501_driver = {
+ .driver = {
+ .name = LTR501_DRV_NAME,
+ .pm = &ltr501_pm_ops,
+ .owner = THIS_MODULE,
+ },
+ .probe = ltr501_probe,
+ .remove = ltr501_remove,
+ .id_table = ltr501_id,
+};
+
+module_i2c_driver(ltr501_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("Lite-On LTR501 ambient light and proximity sensor driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/tcs3472.c b/drivers/iio/light/tcs3472.c
index 887fecf1f9bb..fe063a0a21cd 100644
--- a/drivers/iio/light/tcs3472.c
+++ b/drivers/iio/light/tcs3472.c
@@ -179,7 +179,6 @@ static irqreturn_t tcs3472_trigger_handler(int irq, void *p)
struct iio_poll_func *pf = p;
struct iio_dev *indio_dev = pf->indio_dev;
struct tcs3472_data *data = iio_priv(indio_dev);
- int len = 0;
int i, j = 0;
int ret = tcs3472_req_data(data);
@@ -194,7 +193,6 @@ static irqreturn_t tcs3472_trigger_handler(int irq, void *p)
goto done;
data->buffer[j++] = ret;
- len += 2;
}
iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-25 13:45:01 +0300