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-rw-r--r--drivers/iio/light/Kconfig45
-rw-r--r--drivers/iio/light/Makefile7
-rw-r--r--drivers/iio/light/adjd_s311.c364
-rw-r--r--drivers/iio/light/lm3533-als.c932
-rw-r--r--drivers/iio/light/vcnl4000.c217
5 files changed, 1565 insertions, 0 deletions
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
new file mode 100644
index 00000000000..91d15d2f694
--- /dev/null
+++ b/drivers/iio/light/Kconfig
@@ -0,0 +1,45 @@
+#
+# Light sensors
+#
+menu "Light sensors"
+
+config ADJD_S311
+ tristate "ADJD-S311-CR999 digital color sensor"
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ depends on I2C
+ help
+ If you say yes here you get support for the Avago ADJD-S311-CR999
+ digital color light sensor.
+
+ This driver can also be built as a module. If so, the module
+ will be called adjd_s311.
+
+config SENSORS_LM3533
+ tristate "LM3533 ambient light sensor"
+ depends on MFD_LM3533
+ help
+ If you say yes here you get support for the ambient light sensor
+ interface on National Semiconductor / TI LM3533 Lighting Power
+ chips.
+
+ The sensor interface can be used to control the LEDs and backlights
+ of the chip through defining five light zones and three sets of
+ corresponding output-current values.
+
+ The driver provides raw and mean adc readings along with the current
+ light zone through sysfs. A threshold event can be generated on zone
+ changes. The ALS-control output values can be set per zone for the
+ three current output channels.
+
+config VCNL4000
+ tristate "VCNL4000 combined ALS and proximity sensor"
+ depends on I2C
+ help
+ Say Y here if you want to build a driver for the Vishay VCNL4000
+ combined ambient light and proximity sensor.
+
+ To compile this driver as a module, choose M here: the
+ module will be called vcnl4000.
+
+endmenu
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
new file mode 100644
index 00000000000..13f8a782d29
--- /dev/null
+++ b/drivers/iio/light/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for IIO Light sensors
+#
+
+obj-$(CONFIG_ADJD_S311) += adjd_s311.o
+obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o
+obj-$(CONFIG_VCNL4000) += vcnl4000.o
diff --git a/drivers/iio/light/adjd_s311.c b/drivers/iio/light/adjd_s311.c
new file mode 100644
index 00000000000..1cbb449b319
--- /dev/null
+++ b/drivers/iio/light/adjd_s311.c
@@ -0,0 +1,364 @@
+/*
+ * adjd_s311.c - Support for ADJD-S311-CR999 digital color sensor
+ *
+ * Copyright (C) 2012 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.
+ *
+ * driver for ADJD-S311-CR999 digital color sensor (10-bit channels for
+ * red, green, blue, clear); 7-bit I2C slave address 0x74
+ *
+ * limitations: no calibration, no offset mode, no sleep mode
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/bitmap.h>
+#include <linux/err.h>
+#include <linux/irq.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 ADJD_S311_DRV_NAME "adjd_s311"
+
+#define ADJD_S311_CTRL 0x00
+#define ADJD_S311_CONFIG 0x01
+#define ADJD_S311_CAP_RED 0x06
+#define ADJD_S311_CAP_GREEN 0x07
+#define ADJD_S311_CAP_BLUE 0x08
+#define ADJD_S311_CAP_CLEAR 0x09
+#define ADJD_S311_INT_RED_LO 0x0a
+#define ADJD_S311_INT_RED_HI 0x0b
+#define ADJD_S311_INT_GREEN_LO 0x0c
+#define ADJD_S311_INT_GREEN_HI 0x0d
+#define ADJD_S311_INT_BLUE_LO 0x0e
+#define ADJD_S311_INT_BLUE_HI 0x0f
+#define ADJD_S311_INT_CLEAR_LO 0x10
+#define ADJD_S311_INT_CLEAR_HI 0x11
+#define ADJD_S311_DATA_RED_LO 0x40
+#define ADJD_S311_DATA_RED_HI 0x41
+#define ADJD_S311_DATA_GREEN_LO 0x42
+#define ADJD_S311_DATA_GREEN_HI 0x43
+#define ADJD_S311_DATA_BLUE_LO 0x44
+#define ADJD_S311_DATA_BLUE_HI 0x45
+#define ADJD_S311_DATA_CLEAR_LO 0x46
+#define ADJD_S311_DATA_CLEAR_HI 0x47
+#define ADJD_S311_OFFSET_RED 0x48
+#define ADJD_S311_OFFSET_GREEN 0x49
+#define ADJD_S311_OFFSET_BLUE 0x4a
+#define ADJD_S311_OFFSET_CLEAR 0x4b
+
+#define ADJD_S311_CTRL_GOFS 0x02
+#define ADJD_S311_CTRL_GSSR 0x01
+#define ADJD_S311_CAP_MASK 0x0f
+#define ADJD_S311_INT_MASK 0x0fff
+#define ADJD_S311_DATA_MASK 0x03ff
+
+struct adjd_s311_data {
+ struct i2c_client *client;
+ u16 *buffer;
+};
+
+enum adjd_s311_channel_idx {
+ IDX_RED, IDX_GREEN, IDX_BLUE, IDX_CLEAR
+};
+
+#define ADJD_S311_DATA_REG(chan) (ADJD_S311_DATA_RED_LO + (chan) * 2)
+#define ADJD_S311_INT_REG(chan) (ADJD_S311_INT_RED_LO + (chan) * 2)
+#define ADJD_S311_CAP_REG(chan) (ADJD_S311_CAP_RED + (chan))
+
+static int adjd_s311_req_data(struct iio_dev *indio_dev)
+{
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+ int tries = 10;
+
+ int ret = i2c_smbus_write_byte_data(data->client, ADJD_S311_CTRL,
+ ADJD_S311_CTRL_GSSR);
+ if (ret < 0)
+ return ret;
+
+ while (tries--) {
+ ret = i2c_smbus_read_byte_data(data->client, ADJD_S311_CTRL);
+ if (ret < 0)
+ return ret;
+ if (!(ret & ADJD_S311_CTRL_GSSR))
+ break;
+ msleep(20);
+ }
+
+ if (tries < 0) {
+ dev_err(&data->client->dev,
+ "adjd_s311_req_data() failed, data not ready\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int adjd_s311_read_data(struct iio_dev *indio_dev, u8 reg, int *val)
+{
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+
+ int ret = adjd_s311_req_data(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_word_data(data->client, reg);
+ if (ret < 0)
+ return ret;
+
+ *val = ret & ADJD_S311_DATA_MASK;
+
+ return 0;
+}
+
+static ssize_t adjd_s311_read_int_time(struct iio_dev *indio_dev,
+ uintptr_t private, const struct iio_chan_spec *chan, char *buf)
+{
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+ s32 ret;
+
+ ret = i2c_smbus_read_word_data(data->client,
+ ADJD_S311_INT_REG(chan->address));
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", ret & ADJD_S311_INT_MASK);
+}
+
+static ssize_t adjd_s311_write_int_time(struct iio_dev *indio_dev,
+ uintptr_t private, const struct iio_chan_spec *chan, const char *buf,
+ size_t len)
+{
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+ unsigned long int_time;
+ int ret;
+
+ ret = kstrtoul(buf, 10, &int_time);
+ if (ret)
+ return ret;
+
+ if (int_time > ADJD_S311_INT_MASK)
+ return -EINVAL;
+
+ ret = i2c_smbus_write_word_data(data->client,
+ ADJD_S311_INT_REG(chan->address), int_time);
+ if (ret < 0)
+ return ret;
+
+ return len;
+}
+
+static irqreturn_t adjd_s311_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+ struct iio_buffer *buffer = indio_dev->buffer;
+ s64 time_ns = iio_get_time_ns();
+ int len = 0;
+ int i, j = 0;
+
+ int ret = adjd_s311_req_data(indio_dev);
+ if (ret < 0)
+ goto done;
+
+ for_each_set_bit(i, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ ret = i2c_smbus_read_word_data(data->client,
+ ADJD_S311_DATA_REG(i));
+ if (ret < 0)
+ goto done;
+
+ data->buffer[j++] = ret & ADJD_S311_DATA_MASK;
+ len += 2;
+ }
+
+ if (indio_dev->scan_timestamp)
+ *(s64 *)((u8 *)data->buffer + ALIGN(len, sizeof(s64)))
+ = time_ns;
+ iio_push_to_buffer(buffer, (u8 *)data->buffer, time_ns);
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static const struct iio_chan_spec_ext_info adjd_s311_ext_info[] = {
+ {
+ .name = "integration_time",
+ .read = adjd_s311_read_int_time,
+ .write = adjd_s311_write_int_time,
+ },
+ { }
+};
+
+#define ADJD_S311_CHANNEL(_color, _scan_idx) { \
+ .type = IIO_INTENSITY, \
+ .modified = 1, \
+ .address = (IDX_##_color), \
+ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
+ IIO_CHAN_INFO_HARDWAREGAIN_SEPARATE_BIT, \
+ .channel2 = (IIO_MOD_LIGHT_##_color), \
+ .scan_index = (_scan_idx), \
+ .scan_type = IIO_ST('u', 10, 16, 0), \
+ .ext_info = adjd_s311_ext_info, \
+}
+
+static const struct iio_chan_spec adjd_s311_channels[] = {
+ ADJD_S311_CHANNEL(RED, 0),
+ ADJD_S311_CHANNEL(GREEN, 1),
+ ADJD_S311_CHANNEL(BLUE, 2),
+ ADJD_S311_CHANNEL(CLEAR, 3),
+ IIO_CHAN_SOFT_TIMESTAMP(4),
+};
+
+static int adjd_s311_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ ret = adjd_s311_read_data(indio_dev, chan->address, val);
+ if (ret < 0)
+ return ret;
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ ret = i2c_smbus_read_byte_data(data->client,
+ ADJD_S311_CAP_REG(chan->address));
+ if (ret < 0)
+ return ret;
+ *val = ret & ADJD_S311_CAP_MASK;
+ return IIO_VAL_INT;
+ }
+ return -EINVAL;
+}
+
+static int adjd_s311_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ if (val < 0 || val > ADJD_S311_CAP_MASK)
+ return -EINVAL;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ ADJD_S311_CAP_REG(chan->address), val);
+ return ret;
+ }
+ return -EINVAL;
+}
+
+static int adjd_s311_update_scan_mode(struct iio_dev *indio_dev,
+ const unsigned long *scan_mask)
+{
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+ data->buffer = krealloc(data->buffer, indio_dev->scan_bytes,
+ GFP_KERNEL);
+ if (!data->buffer)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static const struct iio_info adjd_s311_info = {
+ .read_raw = adjd_s311_read_raw,
+ .write_raw = adjd_s311_write_raw,
+ .update_scan_mode = adjd_s311_update_scan_mode,
+ .driver_module = THIS_MODULE,
+};
+
+static int __devinit adjd_s311_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct adjd_s311_data *data;
+ struct iio_dev *indio_dev;
+ int err;
+
+ indio_dev = iio_device_alloc(sizeof(*data));
+ if (indio_dev == NULL) {
+ err = -ENOMEM;
+ goto exit;
+ }
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &adjd_s311_info;
+ indio_dev->name = ADJD_S311_DRV_NAME;
+ indio_dev->channels = adjd_s311_channels;
+ indio_dev->num_channels = ARRAY_SIZE(adjd_s311_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ err = iio_triggered_buffer_setup(indio_dev, NULL,
+ adjd_s311_trigger_handler, NULL);
+ if (err < 0)
+ goto exit_free_device;
+
+ err = iio_device_register(indio_dev);
+ if (err)
+ goto exit_unreg_buffer;
+
+ dev_info(&client->dev, "ADJD-S311 color sensor registered\n");
+
+ return 0;
+
+exit_unreg_buffer:
+ iio_triggered_buffer_cleanup(indio_dev);
+exit_free_device:
+ iio_device_free(indio_dev);
+exit:
+ return err;
+}
+
+static int __devexit adjd_s311_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct adjd_s311_data *data = iio_priv(indio_dev);
+
+ iio_device_unregister(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ kfree(data->buffer);
+ iio_device_free(indio_dev);
+
+ return 0;
+}
+
+static const struct i2c_device_id adjd_s311_id[] = {
+ { "adjd_s311", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, adjd_s311_id);
+
+static struct i2c_driver adjd_s311_driver = {
+ .driver = {
+ .name = ADJD_S311_DRV_NAME,
+ },
+ .probe = adjd_s311_probe,
+ .remove = __devexit_p(adjd_s311_remove),
+ .id_table = adjd_s311_id,
+};
+module_i2c_driver(adjd_s311_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("ADJD-S311 color sensor");
+MODULE_LICENSE("GPL");
diff --git a/drivers/iio/light/lm3533-als.c b/drivers/iio/light/lm3533-als.c
new file mode 100644
index 00000000000..c3e7bac1312
--- /dev/null
+++ b/drivers/iio/light/lm3533-als.c
@@ -0,0 +1,932 @@
+/*
+ * lm3533-als.c -- LM3533 Ambient Light Sensor driver
+ *
+ * Copyright (C) 2011-2012 Texas Instruments
+ *
+ * Author: Johan Hovold <jhovold@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.
+ */
+
+#include <linux/atomic.h>
+#include <linux/fs.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/mfd/core.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+
+#include <linux/mfd/lm3533.h>
+
+
+#define LM3533_ALS_RESISTOR_MIN 1
+#define LM3533_ALS_RESISTOR_MAX 127
+#define LM3533_ALS_CHANNEL_CURRENT_MAX 2
+#define LM3533_ALS_THRESH_MAX 3
+#define LM3533_ALS_ZONE_MAX 4
+
+#define LM3533_REG_ALS_RESISTOR_SELECT 0x30
+#define LM3533_REG_ALS_CONF 0x31
+#define LM3533_REG_ALS_ZONE_INFO 0x34
+#define LM3533_REG_ALS_READ_ADC_RAW 0x37
+#define LM3533_REG_ALS_READ_ADC_AVERAGE 0x38
+#define LM3533_REG_ALS_BOUNDARY_BASE 0x50
+#define LM3533_REG_ALS_TARGET_BASE 0x60
+
+#define LM3533_ALS_ENABLE_MASK 0x01
+#define LM3533_ALS_INPUT_MODE_MASK 0x02
+#define LM3533_ALS_INT_ENABLE_MASK 0x01
+
+#define LM3533_ALS_ZONE_SHIFT 2
+#define LM3533_ALS_ZONE_MASK 0x1c
+
+#define LM3533_ALS_FLAG_INT_ENABLED 1
+
+
+struct lm3533_als {
+ struct lm3533 *lm3533;
+ struct platform_device *pdev;
+
+ unsigned long flags;
+ int irq;
+
+ atomic_t zone;
+ struct mutex thresh_mutex;
+};
+
+
+static int lm3533_als_get_adc(struct iio_dev *indio_dev, bool average,
+ int *adc)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 reg;
+ u8 val;
+ int ret;
+
+ if (average)
+ reg = LM3533_REG_ALS_READ_ADC_AVERAGE;
+ else
+ reg = LM3533_REG_ALS_READ_ADC_RAW;
+
+ ret = lm3533_read(als->lm3533, reg, &val);
+ if (ret) {
+ dev_err(&indio_dev->dev, "failed to read adc\n");
+ return ret;
+ }
+
+ *adc = val;
+
+ return 0;
+}
+
+static int _lm3533_als_get_zone(struct iio_dev *indio_dev, u8 *zone)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 val;
+ int ret;
+
+ ret = lm3533_read(als->lm3533, LM3533_REG_ALS_ZONE_INFO, &val);
+ if (ret) {
+ dev_err(&indio_dev->dev, "failed to read zone\n");
+ return ret;
+ }
+
+ val = (val & LM3533_ALS_ZONE_MASK) >> LM3533_ALS_ZONE_SHIFT;
+ *zone = min_t(u8, val, LM3533_ALS_ZONE_MAX);
+
+ return 0;
+}
+
+static int lm3533_als_get_zone(struct iio_dev *indio_dev, u8 *zone)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ int ret;
+
+ if (test_bit(LM3533_ALS_FLAG_INT_ENABLED, &als->flags)) {
+ *zone = atomic_read(&als->zone);
+ } else {
+ ret = _lm3533_als_get_zone(indio_dev, zone);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+/*
+ * channel output channel 0..2
+ * zone zone 0..4
+ */
+static inline u8 lm3533_als_get_target_reg(unsigned channel, unsigned zone)
+{
+ return LM3533_REG_ALS_TARGET_BASE + 5 * channel + zone;
+}
+
+static int lm3533_als_get_target(struct iio_dev *indio_dev, unsigned channel,
+ unsigned zone, u8 *val)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 reg;
+ int ret;
+
+ if (channel > LM3533_ALS_CHANNEL_CURRENT_MAX)
+ return -EINVAL;
+
+ if (zone > LM3533_ALS_ZONE_MAX)
+ return -EINVAL;
+
+ reg = lm3533_als_get_target_reg(channel, zone);
+ ret = lm3533_read(als->lm3533, reg, val);
+ if (ret)
+ dev_err(&indio_dev->dev, "failed to get target current\n");
+
+ return ret;
+}
+
+static int lm3533_als_set_target(struct iio_dev *indio_dev, unsigned channel,
+ unsigned zone, u8 val)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 reg;
+ int ret;
+
+ if (channel > LM3533_ALS_CHANNEL_CURRENT_MAX)
+ return -EINVAL;
+
+ if (zone > LM3533_ALS_ZONE_MAX)
+ return -EINVAL;
+
+ reg = lm3533_als_get_target_reg(channel, zone);
+ ret = lm3533_write(als->lm3533, reg, val);
+ if (ret)
+ dev_err(&indio_dev->dev, "failed to set target current\n");
+
+ return ret;
+}
+
+static int lm3533_als_get_current(struct iio_dev *indio_dev, unsigned channel,
+ int *val)
+{
+ u8 zone;
+ u8 target;
+ int ret;
+
+ ret = lm3533_als_get_zone(indio_dev, &zone);
+ if (ret)
+ return ret;
+
+ ret = lm3533_als_get_target(indio_dev, channel, zone, &target);
+ if (ret)
+ return ret;
+
+ *val = target;
+
+ return 0;
+}
+
+static int lm3533_als_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ int ret;
+
+ switch (mask) {
+ case 0:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = lm3533_als_get_adc(indio_dev, false, val);
+ break;
+ case IIO_CURRENT:
+ ret = lm3533_als_get_current(indio_dev, chan->channel,
+ val);
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ case IIO_CHAN_INFO_AVERAGE_RAW:
+ ret = lm3533_als_get_adc(indio_dev, true, val);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ if (ret)
+ return ret;
+
+ return IIO_VAL_INT;
+}
+
+#define CHANNEL_CURRENT(_channel) \
+ { \
+ .type = IIO_CURRENT, \
+ .channel = _channel, \
+ .indexed = true, \
+ .output = true, \
+ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, \
+ }
+
+static const struct iio_chan_spec lm3533_als_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .channel = 0,
+ .indexed = true,
+ .info_mask = (IIO_CHAN_INFO_AVERAGE_RAW_SEPARATE_BIT |
+ IIO_CHAN_INFO_RAW_SEPARATE_BIT),
+ },
+ CHANNEL_CURRENT(0),
+ CHANNEL_CURRENT(1),
+ CHANNEL_CURRENT(2),
+};
+
+static irqreturn_t lm3533_als_isr(int irq, void *dev_id)
+{
+
+ struct iio_dev *indio_dev = dev_id;
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 zone;
+ int ret;
+
+ /* Clear interrupt by reading the ALS zone register. */
+ ret = _lm3533_als_get_zone(indio_dev, &zone);
+ if (ret)
+ goto out;
+
+ atomic_set(&als->zone, zone);
+
+ iio_push_event(indio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_LIGHT,
+ 0,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_EITHER),
+ iio_get_time_ns());
+out:
+ return IRQ_HANDLED;
+}
+
+static int lm3533_als_set_int_mode(struct iio_dev *indio_dev, int enable)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 mask = LM3533_ALS_INT_ENABLE_MASK;
+ u8 val;
+ int ret;
+
+ if (enable)
+ val = mask;
+ else
+ val = 0;
+
+ ret = lm3533_update(als->lm3533, LM3533_REG_ALS_ZONE_INFO, val, mask);
+ if (ret) {
+ dev_err(&indio_dev->dev, "failed to set int mode %d\n",
+ enable);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int lm3533_als_get_int_mode(struct iio_dev *indio_dev, int *enable)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 mask = LM3533_ALS_INT_ENABLE_MASK;
+ u8 val;
+ int ret;
+
+ ret = lm3533_read(als->lm3533, LM3533_REG_ALS_ZONE_INFO, &val);
+ if (ret) {
+ dev_err(&indio_dev->dev, "failed to get int mode\n");
+ return ret;
+ }
+
+ *enable = !!(val & mask);
+
+ return 0;
+}
+
+static inline u8 lm3533_als_get_threshold_reg(unsigned nr, bool raising)
+{
+ u8 offset = !raising;
+
+ return LM3533_REG_ALS_BOUNDARY_BASE + 2 * nr + offset;
+}
+
+static int lm3533_als_get_threshold(struct iio_dev *indio_dev, unsigned nr,
+ bool raising, u8 *val)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 reg;
+ int ret;
+
+ if (nr > LM3533_ALS_THRESH_MAX)
+ return -EINVAL;
+
+ reg = lm3533_als_get_threshold_reg(nr, raising);
+ ret = lm3533_read(als->lm3533, reg, val);
+ if (ret)
+ dev_err(&indio_dev->dev, "failed to get threshold\n");
+
+ return ret;
+}
+
+static int lm3533_als_set_threshold(struct iio_dev *indio_dev, unsigned nr,
+ bool raising, u8 val)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 val2;
+ u8 reg, reg2;
+ int ret;
+
+ if (nr > LM3533_ALS_THRESH_MAX)
+ return -EINVAL;
+
+ reg = lm3533_als_get_threshold_reg(nr, raising);
+ reg2 = lm3533_als_get_threshold_reg(nr, !raising);
+
+ mutex_lock(&als->thresh_mutex);
+ ret = lm3533_read(als->lm3533, reg2, &val2);
+ if (ret) {
+ dev_err(&indio_dev->dev, "failed to get threshold\n");
+ goto out;
+ }
+ /*
+ * This device does not allow negative hysteresis (in fact, it uses
+ * whichever value is smaller as the lower bound) so we need to make
+ * sure that thresh_falling <= thresh_raising.
+ */
+ if ((raising && (val < val2)) || (!raising && (val > val2))) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = lm3533_write(als->lm3533, reg, val);
+ if (ret) {
+ dev_err(&indio_dev->dev, "failed to set threshold\n");
+ goto out;
+ }
+out:
+ mutex_unlock(&als->thresh_mutex);
+
+ return ret;
+}
+
+static int lm3533_als_get_hysteresis(struct iio_dev *indio_dev, unsigned nr,
+ u8 *val)
+{
+ struct lm3533_als *als = iio_priv(indio_dev);
+ u8 falling;
+ u8 raising;
+ int ret;
+
+ if (nr > LM3533_ALS_THRESH_MAX)
+ return -EINVAL;
+
+ mutex_lock(&als->thresh_mutex);
+ ret = lm3533_als_get_threshold(indio_dev, nr, false, &falling);
+ if (ret)
+ goto out;
+ ret = lm3533_als_get_threshold(indio_dev, nr, true, &raising);
+ if (ret)
+ goto out;
+
+ *val = raising - falling;
+out:
+ mutex_unlock(&als->thresh_mutex);
+
+ return ret;
+}
+
+static int show_thresh_either_en(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct lm3533_als *als = iio_priv(indio_dev);
+ int enable;
+ int ret;
+
+ if (als->irq) {
+ ret = lm3533_als_get_int_mode(indio_dev, &enable);
+ if (ret)
+ return ret;
+ } else {
+ enable = 0;
+ }
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", enable);
+}
+
+static int store_thresh_either_en(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct lm3533_als *als = iio_priv(indio_dev);
+ unsigned long enable;
+ bool int_enabled;
+ u8 zone;
+ int ret;
+
+ if (!als->irq)
+ return -EBUSY;
+
+ if (kstrtoul(buf, 0, &enable))
+ return -EINVAL;
+
+ int_enabled = test_bit(LM3533_ALS_FLAG_INT_ENABLED, &als->flags);
+
+ if (enable && !int_enabled) {
+ ret = lm3533_als_get_zone(indio_dev, &zone);
+ if (ret)
+ return ret;
+
+ atomic_set(&als->zone, zone);
+
+ set_bit(LM3533_ALS_FLAG_INT_ENABLED, &als->flags);
+ }
+
+ ret = lm3533_als_set_int_mode(indio_dev, enable);
+ if (ret) {
+ if (!int_enabled)
+ clear_bit(LM3533_ALS_FLAG_INT_ENABLED, &als->flags);
+
+ return ret;
+ }
+
+ if (!enable)
+ clear_bit(LM3533_ALS_FLAG_INT_ENABLED, &als->flags);
+
+ return len;
+}
+
+static ssize_t show_zone(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ u8 zone;
+ int ret;
+
+ ret = lm3533_als_get_zone(indio_dev, &zone);
+ if (ret)
+ return ret;
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", zone);
+}
+
+enum lm3533_als_attribute_type {
+ LM3533_ATTR_TYPE_HYSTERESIS,
+ LM3533_ATTR_TYPE_TARGET,
+ LM3533_ATTR_TYPE_THRESH_FALLING,
+ LM3533_ATTR_TYPE_THRESH_RAISING,
+};
+
+struct lm3533_als_attribute {
+ struct device_attribute dev_attr;
+ enum lm3533_als_attribute_type type;
+ u8 val1;
+ u8 val2;
+};
+
+static inline struct lm3533_als_attribute *
+to_lm3533_als_attr(struct device_attribute *attr)
+{
+ return container_of(attr, struct lm3533_als_attribute, dev_attr);
+}
+
+static ssize_t show_als_attr(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct lm3533_als_attribute *als_attr = to_lm3533_als_attr(attr);
+ u8 val;
+ int ret;
+
+ switch (als_attr->type) {
+ case LM3533_ATTR_TYPE_HYSTERESIS:
+ ret = lm3533_als_get_hysteresis(indio_dev, als_attr->val1,
+ &val);
+ break;
+ case LM3533_ATTR_TYPE_TARGET:
+ ret = lm3533_als_get_target(indio_dev, als_attr->val1,
+ als_attr->val2, &val);
+ break;
+ case LM3533_ATTR_TYPE_THRESH_FALLING:
+ ret = lm3533_als_get_threshold(indio_dev, als_attr->val1,
+ false, &val);
+ break;
+ case LM3533_ATTR_TYPE_THRESH_RAISING:
+ ret = lm3533_als_get_threshold(indio_dev, als_attr->val1,
+ true, &val);
+ break;
+ default:
+ ret = -ENXIO;
+ }
+
+ if (ret)
+ return ret;
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n", val);
+}
+
+static ssize_t store_als_attr(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct lm3533_als_attribute *als_attr = to_lm3533_als_attr(attr);
+ u8 val;
+ int ret;
+
+ if (kstrtou8(buf, 0, &val))
+ return -EINVAL;
+
+ switch (als_attr->type) {
+ case LM3533_ATTR_TYPE_TARGET:
+ ret = lm3533_als_set_target(indio_dev, als_attr->val1,
+ als_attr->val2, val);
+ break;
+ case LM3533_ATTR_TYPE_THRESH_FALLING:
+ ret = lm3533_als_set_threshold(indio_dev, als_attr->val1,
+ false, val);
+ break;
+ case LM3533_ATTR_TYPE_THRESH_RAISING:
+ ret = lm3533_als_set_threshold(indio_dev, als_attr->val1,
+ true, val);
+ break;
+ default:
+ ret = -ENXIO;
+ }
+
+ if (ret)
+ return ret;
+
+ return len;
+}
+
+#define ALS_ATTR(_name, _mode, _show, _store, _type, _val1, _val2) \
+ { .dev_attr = __ATTR(_name, _mode, _show, _store), \
+ .type = _type, \
+ .val1 = _val1, \
+ .val2 = _val2 }
+
+#define LM3533_ALS_ATTR(_name, _mode, _show, _store, _type, _val1, _val2) \
+ struct lm3533_als_attribute lm3533_als_attr_##_name = \
+ ALS_ATTR(_name, _mode, _show, _store, _type, _val1, _val2)
+
+#define ALS_TARGET_ATTR_RW(_channel, _zone) \
+ LM3533_ALS_ATTR(out_current##_channel##_current##_zone##_raw, \
+ S_IRUGO | S_IWUSR, \
+ show_als_attr, store_als_attr, \
+ LM3533_ATTR_TYPE_TARGET, _channel, _zone)
+/*
+ * ALS output current values (ALS mapper targets)
+ *
+ * out_current[0-2]_current[0-4]_raw 0-255
+ */
+static ALS_TARGET_ATTR_RW(0, 0);
+static ALS_TARGET_ATTR_RW(0, 1);
+static ALS_TARGET_ATTR_RW(0, 2);
+static ALS_TARGET_ATTR_RW(0, 3);
+static ALS_TARGET_ATTR_RW(0, 4);
+
+static ALS_TARGET_ATTR_RW(1, 0);
+static ALS_TARGET_ATTR_RW(1, 1);
+static ALS_TARGET_ATTR_RW(1, 2);
+static ALS_TARGET_ATTR_RW(1, 3);
+static ALS_TARGET_ATTR_RW(1, 4);
+
+static ALS_TARGET_ATTR_RW(2, 0);
+static ALS_TARGET_ATTR_RW(2, 1);
+static ALS_TARGET_ATTR_RW(2, 2);
+static ALS_TARGET_ATTR_RW(2, 3);
+static ALS_TARGET_ATTR_RW(2, 4);
+
+#define ALS_THRESH_FALLING_ATTR_RW(_nr) \
+ LM3533_ALS_ATTR(in_illuminance0_thresh##_nr##_falling_value, \
+ S_IRUGO | S_IWUSR, \
+ show_als_attr, store_als_attr, \
+ LM3533_ATTR_TYPE_THRESH_FALLING, _nr, 0)
+
+#define ALS_THRESH_RAISING_ATTR_RW(_nr) \
+ LM3533_ALS_ATTR(in_illuminance0_thresh##_nr##_raising_value, \
+ S_IRUGO | S_IWUSR, \
+ show_als_attr, store_als_attr, \
+ LM3533_ATTR_TYPE_THRESH_RAISING, _nr, 0)
+/*
+ * ALS Zone thresholds (boundaries)
+ *
+ * in_illuminance0_thresh[0-3]_falling_value 0-255
+ * in_illuminance0_thresh[0-3]_raising_value 0-255
+ */
+static ALS_THRESH_FALLING_ATTR_RW(0);
+static ALS_THRESH_FALLING_ATTR_RW(1);
+static ALS_THRESH_FALLING_ATTR_RW(2);
+static ALS_THRESH_FALLING_ATTR_RW(3);
+
+static ALS_THRESH_RAISING_ATTR_RW(0);
+static ALS_THRESH_RAISING_ATTR_RW(1);
+static ALS_THRESH_RAISING_ATTR_RW(2);
+static ALS_THRESH_RAISING_ATTR_RW(3);
+
+#define ALS_HYSTERESIS_ATTR_RO(_nr) \
+ LM3533_ALS_ATTR(in_illuminance0_thresh##_nr##_hysteresis, \
+ S_IRUGO, show_als_attr, NULL, \
+ LM3533_ATTR_TYPE_HYSTERESIS, _nr, 0)
+/*
+ * ALS Zone threshold hysteresis
+ *
+ * threshY_hysteresis = threshY_raising - threshY_falling
+ *
+ * in_illuminance0_thresh[0-3]_hysteresis 0-255
+ * in_illuminance0_thresh[0-3]_hysteresis 0-255
+ */
+static ALS_HYSTERESIS_ATTR_RO(0);
+static ALS_HYSTERESIS_ATTR_RO(1);
+static ALS_HYSTERESIS_ATTR_RO(2);
+static ALS_HYSTERESIS_ATTR_RO(3);
+
+#define ILLUMINANCE_ATTR_RO(_name) \
+ DEVICE_ATTR(in_illuminance0_##_name, S_IRUGO, show_##_name, NULL)
+#define ILLUMINANCE_ATTR_RW(_name) \
+ DEVICE_ATTR(in_illuminance0_##_name, S_IRUGO | S_IWUSR , \
+ show_##_name, store_##_name)
+/*
+ * ALS Zone threshold-event enable
+ *
+ * in_illuminance0_thresh_either_en 0,1
+ */
+static ILLUMINANCE_ATTR_RW(thresh_either_en);
+
+/*
+ * ALS Current Zone
+ *
+ * in_illuminance0_zone 0-4
+ */
+static ILLUMINANCE_ATTR_RO(zone);
+
+static struct attribute *lm3533_als_event_attributes[] = {
+ &dev_attr_in_illuminance0_thresh_either_en.attr,
+ &lm3533_als_attr_in_illuminance0_thresh0_falling_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh0_hysteresis.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh0_raising_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh1_falling_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh1_hysteresis.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh1_raising_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh2_falling_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh2_hysteresis.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh2_raising_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh3_falling_value.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh3_hysteresis.dev_attr.attr,
+ &lm3533_als_attr_in_illuminance0_thresh3_raising_value.dev_attr.attr,
+ NULL
+};
+
+static struct attribute_group lm3533_als_event_attribute_group = {
+ .attrs = lm3533_als_event_attributes
+};
+
+static struct attribute *lm3533_als_attributes[] = {
+ &dev_attr_in_illuminance0_zone.attr,
+ &lm3533_als_attr_out_current0_current0_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current0_current1_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current0_current2_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current0_current3_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current0_current4_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current1_current0_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current1_current1_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current1_current2_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current1_current3_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current1_current4_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current2_current0_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current2_current1_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current2_current2_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current2_current3_raw.dev_attr.attr,
+ &lm3533_als_attr_out_current2_current4_raw.dev_attr.attr,
+ NULL
+};
+
+static struct attribute_group lm3533_als_attribute_group = {
+ .attrs = lm3533_als_attributes
+};
+
+static int __devinit lm3533_als_set_input_mode(struct lm3533_als *als,
+ bool pwm_mode)
+{
+ u8 mask = LM3533_ALS_INPUT_MODE_MASK;
+ u8 val;
+ int ret;
+
+ if (pwm_mode)
+ val = mask; /* pwm input */
+ else
+ val = 0; /* analog input */
+
+ ret = lm3533_update(als->lm3533, LM3533_REG_ALS_CONF, val, mask);
+ if (ret) {
+ dev_err(&als->pdev->dev, "failed to set input mode %d\n",
+ pwm_mode);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __devinit lm3533_als_set_resistor(struct lm3533_als *als, u8 val)
+{
+ int ret;
+
+ if (val < LM3533_ALS_RESISTOR_MIN || val > LM3533_ALS_RESISTOR_MAX)
+ return -EINVAL;
+
+ ret = lm3533_write(als->lm3533, LM3533_REG_ALS_RESISTOR_SELECT, val);
+ if (ret) {
+ dev_err(&als->pdev->dev, "failed to set resistor\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __devinit lm3533_als_setup(struct lm3533_als *als,
+ struct lm3533_als_platform_data *pdata)
+{
+ int ret;
+
+ ret = lm3533_als_set_input_mode(als, pdata->pwm_mode);
+ if (ret)
+ return ret;
+
+ /* ALS input is always high impedance in PWM-mode. */
+ if (!pdata->pwm_mode) {
+ ret = lm3533_als_set_resistor(als, pdata->r_select);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __devinit lm3533_als_setup_irq(struct lm3533_als *als, void *dev)
+{
+ u8 mask = LM3533_ALS_INT_ENABLE_MASK;
+ int ret;
+
+ /* Make sure interrupts are disabled. */
+ ret = lm3533_update(als->lm3533, LM3533_REG_ALS_ZONE_INFO, 0, mask);
+ if (ret) {
+ dev_err(&als->pdev->dev, "failed to disable interrupts\n");
+ return ret;
+ }
+
+ ret = request_threaded_irq(als->irq, NULL, lm3533_als_isr,
+ IRQF_TRIGGER_LOW | IRQF_ONESHOT,
+ dev_name(&als->pdev->dev), dev);
+ if (ret) {
+ dev_err(&als->pdev->dev, "failed to request irq %d\n",
+ als->irq);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __devinit lm3533_als_enable(struct lm3533_als *als)
+{
+ u8 mask = LM3533_ALS_ENABLE_MASK;
+ int ret;
+
+ ret = lm3533_update(als->lm3533, LM3533_REG_ALS_CONF, mask, mask);
+ if (ret)
+ dev_err(&als->pdev->dev, "failed to enable ALS\n");
+
+ return ret;
+}
+
+static int lm3533_als_disable(struct lm3533_als *als)
+{
+ u8 mask = LM3533_ALS_ENABLE_MASK;
+ int ret;
+
+ ret = lm3533_update(als->lm3533, LM3533_REG_ALS_CONF, 0, mask);
+ if (ret)
+ dev_err(&als->pdev->dev, "failed to disable ALS\n");
+
+ return ret;
+}
+
+static const struct iio_info lm3533_als_info = {
+ .attrs = &lm3533_als_attribute_group,
+ .event_attrs = &lm3533_als_event_attribute_group,
+ .driver_module = THIS_MODULE,
+ .read_raw = &lm3533_als_read_raw,
+};
+
+static int __devinit lm3533_als_probe(struct platform_device *pdev)
+{
+ struct lm3533 *lm3533;
+ struct lm3533_als_platform_data *pdata;
+ struct lm3533_als *als;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ lm3533 = dev_get_drvdata(pdev->dev.parent);
+ if (!lm3533)
+ return -EINVAL;
+
+ pdata = pdev->dev.platform_data;
+ if (!pdata) {
+ dev_err(&pdev->dev, "no platform data\n");
+ return -EINVAL;
+ }
+
+ indio_dev = iio_device_alloc(sizeof(*als));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ indio_dev->info = &lm3533_als_info;
+ indio_dev->channels = lm3533_als_channels;
+ indio_dev->num_channels = ARRAY_SIZE(lm3533_als_channels);
+ indio_dev->name = dev_name(&pdev->dev);
+ indio_dev->dev.parent = pdev->dev.parent;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ als = iio_priv(indio_dev);
+ als->lm3533 = lm3533;
+ als->pdev = pdev;
+ als->irq = lm3533->irq;
+ atomic_set(&als->zone, 0);
+ mutex_init(&als->thresh_mutex);
+
+ platform_set_drvdata(pdev, indio_dev);
+
+ if (als->irq) {
+ ret = lm3533_als_setup_irq(als, indio_dev);
+ if (ret)
+ goto err_free_dev;
+ }
+
+ ret = lm3533_als_setup(als, pdata);
+ if (ret)
+ goto err_free_irq;
+
+ ret = lm3533_als_enable(als);
+ if (ret)
+ goto err_free_irq;
+
+ ret = iio_device_register(indio_dev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register ALS\n");
+ goto err_disable;
+ }
+
+ return 0;
+
+err_disable:
+ lm3533_als_disable(als);
+err_free_irq:
+ if (als->irq)
+ free_irq(als->irq, indio_dev);
+err_free_dev:
+ iio_device_free(indio_dev);
+
+ return ret;
+}
+
+static int __devexit lm3533_als_remove(struct platform_device *pdev)
+{
+ struct iio_dev *indio_dev = platform_get_drvdata(pdev);
+ struct lm3533_als *als = iio_priv(indio_dev);
+
+ lm3533_als_set_int_mode(indio_dev, false);
+ iio_device_unregister(indio_dev);
+ lm3533_als_disable(als);
+ if (als->irq)
+ free_irq(als->irq, indio_dev);
+ iio_device_free(indio_dev);
+
+ return 0;
+}
+
+static struct platform_driver lm3533_als_driver = {
+ .driver = {
+ .name = "lm3533-als",
+ .owner = THIS_MODULE,
+ },
+ .probe = lm3533_als_probe,
+ .remove = __devexit_p(lm3533_als_remove),
+};
+module_platform_driver(lm3533_als_driver);
+
+MODULE_AUTHOR("Johan Hovold <jhovold@gmail.com>");
+MODULE_DESCRIPTION("LM3533 Ambient Light Sensor driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:lm3533-als");
diff --git a/drivers/iio/light/vcnl4000.c b/drivers/iio/light/vcnl4000.c
new file mode 100644
index 00000000000..e49cb9784a6
--- /dev/null
+++ b/drivers/iio/light/vcnl4000.c
@@ -0,0 +1,217 @@
+/*
+ * vcnl4000.c - Support for Vishay VCNL4000 combined ambient light and
+ * proximity sensor
+ *
+ * Copyright 2012 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.
+ *
+ * IIO driver for VCNL4000 (7-bit I2C slave address 0x13)
+ *
+ * TODO:
+ * allow to adjust IR current
+ * proximity threshold and event handling
+ */
+
+#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>
+
+#define VCNL4000_DRV_NAME "vcnl4000"
+
+#define VCNL4000_COMMAND 0x80 /* Command register */
+#define VCNL4000_PROD_REV 0x81 /* Product ID and Revision ID */
+#define VCNL4000_LED_CURRENT 0x83 /* IR LED current for proximity mode */
+#define VCNL4000_AL_PARAM 0x84 /* Ambient light parameter register */
+#define VCNL4000_AL_RESULT_HI 0x85 /* Ambient light result register, MSB */
+#define VCNL4000_AL_RESULT_LO 0x86 /* Ambient light result register, LSB */
+#define VCNL4000_PS_RESULT_HI 0x87 /* Proximity result register, MSB */
+#define VCNL4000_PS_RESULT_LO 0x88 /* Proximity result register, LSB */
+#define VCNL4000_PS_MEAS_FREQ 0x89 /* Proximity test signal frequency */
+#define VCNL4000_PS_MOD_ADJ 0x8a /* Proximity modulator timing adjustment */
+
+/* Bit masks for COMMAND register */
+#define VCNL4000_AL_RDY 0x40 /* ALS data ready? */
+#define VCNL4000_PS_RDY 0x20 /* proximity data ready? */
+#define VCNL4000_AL_OD 0x10 /* start on-demand ALS measurement */
+#define VCNL4000_PS_OD 0x08 /* start on-demand proximity measurement */
+
+struct vcnl4000_data {
+ struct i2c_client *client;
+};
+
+static const struct i2c_device_id vcnl4000_id[] = {
+ { "vcnl4000", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, vcnl4000_id);
+
+static int vcnl4000_measure(struct vcnl4000_data *data, u8 req_mask,
+ u8 rdy_mask, u8 data_reg, int *val)
+{
+ int tries = 20;
+ u16 buf;
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND,
+ req_mask);
+ if (ret < 0)
+ return ret;
+
+ /* wait for data to become ready */
+ while (tries--) {
+ ret = i2c_smbus_read_byte_data(data->client, VCNL4000_COMMAND);
+ if (ret < 0)
+ return ret;
+ if (ret & rdy_mask)
+ break;
+ msleep(20); /* measurement takes up to 100 ms */
+ }
+
+ if (tries < 0) {
+ dev_err(&data->client->dev,
+ "vcnl4000_measure() failed, data not ready\n");
+ return -EIO;
+ }
+
+ ret = i2c_smbus_read_i2c_block_data(data->client,
+ data_reg, sizeof(buf), (u8 *) &buf);
+ if (ret < 0)
+ return ret;
+
+ *val = be16_to_cpu(buf);
+
+ return 0;
+}
+
+static const struct iio_chan_spec vcnl4000_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
+ IIO_CHAN_INFO_SCALE_SEPARATE_BIT,
+ }, {
+ .type = IIO_PROXIMITY,
+ .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT,
+ }
+};
+
+static int vcnl4000_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ int ret = -EINVAL;
+ struct vcnl4000_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = vcnl4000_measure(data,
+ VCNL4000_AL_OD, VCNL4000_AL_RDY,
+ VCNL4000_AL_RESULT_HI, val);
+ if (ret < 0)
+ return ret;
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_PROXIMITY:
+ ret = vcnl4000_measure(data,
+ VCNL4000_PS_OD, VCNL4000_PS_RDY,
+ VCNL4000_PS_RESULT_HI, val);
+ if (ret < 0)
+ return ret;
+ ret = IIO_VAL_INT;
+ break;
+ default:
+ break;
+ }
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ if (chan->type == IIO_LIGHT) {
+ *val = 0;
+ *val2 = 250000;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static const struct iio_info vcnl4000_info = {
+ .read_raw = vcnl4000_read_raw,
+ .driver_module = THIS_MODULE,
+};
+
+static int __devinit vcnl4000_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct vcnl4000_data *data;
+ struct iio_dev *indio_dev;
+ int ret;
+
+ indio_dev = iio_device_alloc(sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ ret = i2c_smbus_read_byte_data(data->client, VCNL4000_PROD_REV);
+ if (ret < 0)
+ goto error_free_dev;
+
+ dev_info(&client->dev, "VCNL4000 Ambient light/proximity sensor, Prod %02x, Rev: %02x\n",
+ ret >> 4, ret & 0xf);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->info = &vcnl4000_info;
+ indio_dev->channels = vcnl4000_channels;
+ indio_dev->num_channels = ARRAY_SIZE(vcnl4000_channels);
+ indio_dev->name = VCNL4000_DRV_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto error_free_dev;
+
+ return 0;
+
+error_free_dev:
+ iio_device_free(indio_dev);
+ return ret;
+}
+
+static int __devexit vcnl4000_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ iio_device_unregister(indio_dev);
+ iio_device_free(indio_dev);
+
+ return 0;
+}
+
+static struct i2c_driver vcnl4000_driver = {
+ .driver = {
+ .name = VCNL4000_DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+ .probe = vcnl4000_probe,
+ .remove = __devexit_p(vcnl4000_remove),
+ .id_table = vcnl4000_id,
+};
+
+module_i2c_driver(vcnl4000_driver);
+
+MODULE_AUTHOR("Peter Meerwald <pmeerw@pmeerw.net>");
+MODULE_DESCRIPTION("Vishay VCNL4000 proximity/ambient light sensor driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-01-04 21:02:07 +0000