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Date: Fri, 17 Jun 2016 14:10:46 +0300
From: Crestez Dan Leonard <leonard.crestez@...el.com>
To: Jonathan Cameron <jic23@...nel.org>, linux-iio@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, Hartmut Knaack <knaack.h@....de>,
Lars-Peter Clausen <lars@...afoo.de>,
Peter Meerwald-Stadler <pmeerw@...erw.net>,
Daniel Baluta <daniel.baluta@...el.com>,
Crestez Dan Leonard <leonard.crestez@...el.com>
Subject: [PATCH v3] iio: Add driver for Silabs si1132, si1141/2/3 and si1145/6/7 ambient light, uv index and proximity sensors
From: Peter Meerwald <pmeerw@...erw.net>
The si114x supports x=1,2,3 IR LEDs for proximity sensing together with
visible and IR ambient light sensing (ALS).
Newer parts (si1132, si1145/6/7) can measure UV light and compute an UV index
Changes since v2:
* Add myself to copyright
* Remove TODO: power management.
It's fine because by default the device remains sleeping.
* Elaborate comments on si1145_data
* Adjust comment syntax
* Drop special case for reading single words.
* Use manual request_irq to ensure proper init/free ordering
Changes since Peter's v1:
* Fix set_chlist returning positive value on success
* Do not assume channel addresses are in order of scan index
* Take lock in buffer_preenable
* Print part/rev/seq id at probe time
* Cleanup param query/update
* Poll for response when executing commands
* Allow writes even when buffer enabled
* Add interrupt support
* Rename new to uncompressed_meas_rate for clarity
* Fix handling IIO_CHAN_INFO_SCALE:
Make it so that when changing the scale the processed value remains
identical in identical conditions. The exposed value should be
proportional to 2 ** -ADC_GAIN.
* Initialize UCOEF registers to default values from datasheet
Otherwise by default the coefficients are zero and so are all the
values read back
* Fix reading in_uvindex_raw manually (not in buffer mode)
* Expose in_uvindex_scale=0.01
* Expose ADC offset, making zero values meaningful
This is not very well documented, for example the si1145/6/7 datasheet
lists register 0x1a as 'reserved'. It might make sense to just return a
constant on these models.
This was tested on si1143 and si1145
Link to v2: https://www.spinics.net/lists/linux-iio/msg25055.html
Signed-off-by: Peter Meerwald <pmeerw@...erw.net>
Signed-off-by: Crestez Dan Leonard <leonard.crestez@...el.com>
---
drivers/iio/light/Kconfig | 13 +
drivers/iio/light/Makefile | 1 +
drivers/iio/light/si1145.c | 1347 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 1361 insertions(+)
create mode 100644 drivers/iio/light/si1145.c
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index 7c566f5..c362e63 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -266,6 +266,19 @@ config PA12203001
This driver can also be built as a module. If so, the module
will be called pa12203001.
+config SI1145
+ tristate "SI1132 and SI1141/2/3/5/6/7 combined ALS, UV index and proximity sensor"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say Y here if you want to build a driver for the Silicon Labs SI1132 or
+ SI1141/2/3/5/6/7 combined ambient light, UV index and proximity sensor
+ chips.
+
+ To compile this driver as a module, choose M here: the module will be
+ called si1145.
+
config STK3310
tristate "STK3310 ALS and proximity sensor"
depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index 6f2a3c6..c5768df 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -26,6 +26,7 @@ obj-$(CONFIG_OPT3001) += opt3001.o
obj-$(CONFIG_PA12203001) += pa12203001.o
obj-$(CONFIG_RPR0521) += rpr0521.o
obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o
+obj-$(CONFIG_SI1145) += si1145.o
obj-$(CONFIG_STK3310) += stk3310.o
obj-$(CONFIG_TCS3414) += tcs3414.o
obj-$(CONFIG_TCS3472) += tcs3472.o
diff --git a/drivers/iio/light/si1145.c b/drivers/iio/light/si1145.c
new file mode 100644
index 0000000..e82fb4b
--- /dev/null
+++ b/drivers/iio/light/si1145.c
@@ -0,0 +1,1347 @@
+/*
+ * si1145.c - Support for Silabs SI1132 and SI1141/2/3/5/6/7 combined ambient
+ * light, UV index and proximity sensors
+ *
+ * Copyright 2014 Peter Meerwald-Stadler <pmeerw@...erw.net>
+ * Copyright 2016 Crestez Dan Leonard <leonard.crestez@...el.com>
+ *
+ * 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.
+ *
+ * SI1132 (7-bit I2C slave address 0x60)
+ * SI1141/2/3 (7-bit I2C slave address 0x5a)
+ * SI1145/6/6 (7-bit I2C slave address 0x60)
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+#include <linux/iio/buffer.h>
+#include <linux/util_macros.h>
+
+#define SI1145_REG_PART_ID 0x00
+#define SI1145_REG_REV_ID 0x01
+#define SI1145_REG_SEQ_ID 0x02
+#define SI1145_REG_INT_CFG 0x03
+#define SI1145_REG_IRQ_ENABLE 0x04
+#define SI1145_REG_IRQ_MODE 0x05
+#define SI1145_REG_HW_KEY 0x07
+#define SI1145_REG_MEAS_RATE 0x08
+#define SI1145_REG_PS_LED21 0x0f
+#define SI1145_REG_PS_LED3 0x10
+#define SI1145_REG_UCOEF1 0x13
+#define SI1145_REG_UCOEF2 0x14
+#define SI1145_REG_UCOEF3 0x15
+#define SI1145_REG_UCOEF4 0x16
+#define SI1145_REG_PARAM_WR 0x17
+#define SI1145_REG_COMMAND 0x18
+#define SI1145_REG_RESPONSE 0x20
+#define SI1145_REG_IRQ_STATUS 0x21
+#define SI1145_REG_ALSVIS_DATA 0x22
+#define SI1145_REG_ALSIR_DATA 0x24
+#define SI1145_REG_PS1_DATA 0x26
+#define SI1145_REG_PS2_DATA 0x28
+#define SI1145_REG_PS3_DATA 0x2a
+#define SI1145_REG_AUX_DATA 0x2c
+#define SI1145_REG_PARAM_RD 0x2e
+#define SI1145_REG_CHIP_STAT 0x30
+
+#define SI1145_UCOEF1_DEFAULT 0x7b
+#define SI1145_UCOEF2_DEFAULT 0x6b
+#define SI1145_UCOEF3_DEFAULT 0x01
+#define SI1145_UCOEF4_DEFAULT 0x00
+
+/* Helper to figure out PS_LED register / shift per channel */
+#define SI1145_PS_LED_REG(ch) \
+ (((ch) == 2) ? SI1145_REG_PS_LED3 : SI1145_REG_PS_LED21)
+#define SI1145_PS_LED_SHIFT(ch) \
+ (((ch) == 1) ? 4 : 0)
+
+/* Parameter offsets */
+#define SI1145_PARAM_CHLIST 0x01
+#define SI1145_PARAM_PSLED12_SELECT 0x02
+#define SI1145_PARAM_PSLED3_SELECT 0x03
+#define SI1145_PARAM_PS_ENCODING 0x05
+#define SI1145_PARAM_ALS_ENCODING 0x06
+#define SI1145_PARAM_PS1_ADC_MUX 0x07
+#define SI1145_PARAM_PS2_ADC_MUX 0x08
+#define SI1145_PARAM_PS3_ADC_MUX 0x09
+#define SI1145_PARAM_PS_ADC_COUNTER 0x0a
+#define SI1145_PARAM_PS_ADC_GAIN 0x0b
+#define SI1145_PARAM_PS_ADC_MISC 0x0c
+#define SI1145_PARAM_ALS_ADC_MUX 0x0d
+#define SI1145_PARAM_ALSIR_ADC_MUX 0x0e
+#define SI1145_PARAM_AUX_ADC_MUX 0x0f
+#define SI1145_PARAM_ALSVIS_ADC_COUNTER 0x10
+#define SI1145_PARAM_ALSVIS_ADC_GAIN 0x11
+#define SI1145_PARAM_ALSVIS_ADC_MISC 0x12
+#define SI1145_PARAM_LED_RECOVERY 0x1c
+#define SI1145_PARAM_ALSIR_ADC_COUNTER 0x1d
+#define SI1145_PARAM_ALSIR_ADC_GAIN 0x1e
+#define SI1145_PARAM_ALSIR_ADC_MISC 0x1f
+#define SI1145_PARAM_ADC_OFFSET 0x1a
+
+/* Channel enable masks for CHLIST parameter */
+#define SI1145_CHLIST_EN_PS1 0x01
+#define SI1145_CHLIST_EN_PS2 0x02
+#define SI1145_CHLIST_EN_PS3 0x04
+#define SI1145_CHLIST_EN_ALSVIS 0x10
+#define SI1145_CHLIST_EN_ALSIR 0x20
+#define SI1145_CHLIST_EN_AUX 0x40
+#define SI1145_CHLIST_EN_UV 0x80
+
+/* Signal range mask for ADC_MISC parameter */
+#define SI1145_ADC_MISC_RANGE 0x20
+
+/* Commands for REG_COMMAND */
+#define SI1145_CMD_NOP 0x00
+#define SI1145_CMD_RESET 0x01
+#define SI1145_CMD_PS_FORCE 0x05
+#define SI1145_CMD_ALS_FORCE 0x06
+#define SI1145_CMD_PSALS_FORCE 0x07
+#define SI1145_CMD_PS_PAUSE 0x09
+#define SI1145_CMD_ALS_PAUSE 0x0a
+#define SI1145_CMD_PSALS_PAUSE 0x0b
+#define SI1145_CMD_PS_AUTO 0x0d
+#define SI1145_CMD_ALS_AUTO 0x0e
+#define SI1145_CMD_PSALS_AUTO 0x0f
+#define SI1145_CMD_PARAM_QUERY 0x80
+#define SI1145_CMD_PARAM_SET 0xa0
+
+#define SI1145_RSP_INVALID_SETTING 0x80
+#define SI1145_RSP_COUNTER_MASK 0x0F
+
+/* Minimum sleep after each command to ensure it's received */
+#define SI1145_COMMAND_MIN_SLEEP_MS 5
+/* Return -ETIMEDOUT after this long */
+#define SI1145_COMMAND_TIMEOUT_MS 25
+
+/* Interrupt configuration masks for INT_CFG register */
+#define SI1145_INT_CFG_OE 0x01 /* enable interrupt */
+#define SI1145_INT_CFG_MODE 0x02 /* auto reset interrupt pin */
+
+/* Interrupt enable masks for IRQ_ENABLE register */
+#define SI1145_BIT_PS3_IE 0x10
+#define SI1145_BIT_PS2_IE 0x08
+#define SI1145_BIT_PS1_IE 0x04
+#define SI1145_BIT_ALS_IE 0x01
+#define SI1145_MASK_ALL_IE 0x1d
+
+#define SI1145_MUX_TEMP 0x65
+#define SI1145_MUX_VDD 0x75
+
+enum {
+ SI1132,
+ SI1141,
+ SI1142,
+ SI1143,
+ SI1145,
+ SI1146,
+ SI1147,
+};
+
+struct si1145_part_info {
+ u8 part;
+ const struct iio_info *iio_info;
+ const struct iio_chan_spec *channels;
+ unsigned int num_channels;
+ unsigned int num_leds;
+ bool uncompressed_meas_rate;
+};
+
+/**
+ * struct si1145_data - si1145 chip state data
+ * @client: I2C client
+ * @lock: mutex to protect shared state.
+ * @cmdlock: Low-level mutex to protect command execution only
+ * @rsp_seq: Next expected response number or -1 if counter reset required
+ * @scan_mask: Saved scan mask to avoid duplicate set_chlist
+ * @autonomous: If automatic measurements are active (for buffer support)
+ * @part_info: Part information
+ * @trig: Pointer to iio trigger
+ * @meas_rate: Value of MEAS_RATE register. Only set in HW in auto mode
+ */
+struct si1145_data {
+ struct i2c_client *client;
+ struct mutex lock;
+ struct mutex cmdlock;
+ int rsp_seq;
+ const struct si1145_part_info *part_info;
+ unsigned long scan_mask;
+ bool autonomous;
+ struct iio_trigger *trig;
+ int meas_rate;
+};
+
+/**
+ * __si1145_command_reset() - Send CMD_NOP and wait for response 0
+ *
+ * Does not modify data->rsp_seq
+ *
+ * Return: 0 on success and -errno on error.
+ */
+static int __si1145_command_reset(struct si1145_data *data)
+{
+ struct device *dev = &data->client->dev;
+ unsigned long start_jiffies = jiffies;
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, SI1145_REG_COMMAND, SI1145_CMD_NOP);
+ if (ret < 0)
+ return ret;
+ msleep(SI1145_COMMAND_MIN_SLEEP_MS);
+
+ while (true) {
+ ret = i2c_smbus_read_byte_data(data->client, SI1145_REG_RESPONSE);
+ if (ret < 0)
+ return ret;
+ if (ret == 0)
+ return 0;
+ if (time_after(jiffies, start_jiffies + SI1145_COMMAND_TIMEOUT_MS * HZ / 1000)) {
+ dev_warn(dev, "timeout on reset\n");
+ return -ETIMEDOUT;
+ }
+ msleep(5);
+ continue;
+ }
+}
+
+/**
+ * si1145_command() - Execute a command and poll the response register
+ *
+ * All conversion overflows are reported as -EOVERFLOW
+ * INVALID_SETTING is reported as -EINVAL
+ * Timeouts are reported as -ETIMEDOUT
+ *
+ * Return: 0 on success or -errno on failure
+ */
+static int si1145_command(struct si1145_data *data, u8 cmd)
+{
+ struct device *dev = &data->client->dev;
+ unsigned long start_jiffies = jiffies;
+ int ret;
+
+ mutex_lock(&data->cmdlock);
+
+ if (data->rsp_seq < 0) {
+ ret = __si1145_command_reset(data);
+ if (ret < 0) {
+ dev_err(dev, "Failed to reset command counter: %d\n", ret);
+ goto out;
+ }
+ data->rsp_seq = 0;
+ }
+
+ ret = i2c_smbus_write_byte_data(data->client, SI1145_REG_COMMAND, cmd);
+ if (ret) {
+ dev_warn(dev, "failed to write command ret=%d\n", ret);
+ goto out;
+ }
+ /* Sleep a little to ensure the command is received */
+ msleep(SI1145_COMMAND_MIN_SLEEP_MS);
+
+ while (true) {
+ ret = i2c_smbus_read_byte_data(data->client, SI1145_REG_RESPONSE);
+ if (ret < 0) {
+ dev_warn(dev, "failed to read response ret=%d\n", ret);
+ goto out;
+ }
+
+ if ((ret & ~SI1145_RSP_COUNTER_MASK) == 0) {
+ if (ret == data->rsp_seq) {
+ if (time_after(jiffies, start_jiffies + SI1145_COMMAND_TIMEOUT_MS * HZ / 1000)) {
+ dev_warn(dev, "timeout on command %#02hhx\n", cmd);
+ ret = -ETIMEDOUT;
+ goto out;
+ }
+ msleep(5);
+ continue;
+ }
+ if (ret == ((data->rsp_seq + 1) & SI1145_RSP_COUNTER_MASK)) {
+ data->rsp_seq = ret;
+ ret = 0;
+ goto out;
+ }
+ dev_warn(dev, "Unexpected response counter %d instead of %d\n",
+ ret, (data->rsp_seq + 1) & SI1145_RSP_COUNTER_MASK);
+ /* Force a counter reset next time */
+ data->rsp_seq = -1;
+ ret = -EIO;
+ goto out;
+ } else {
+ if (ret == SI1145_RSP_INVALID_SETTING) {
+ dev_warn(dev, "INVALID_SETTING error on command %#02hhx\n", cmd);
+ ret = -EINVAL;
+ } else {
+ /* All overflows are treated identically */
+ dev_dbg(dev, "Overflow ret=%#02hhx cmd=%#02hhx\n", ret, cmd);
+ ret = -EOVERFLOW;
+ }
+ /* Force a counter reset next time */
+ data->rsp_seq = -1;
+ goto out;
+ }
+ }
+
+out:
+ mutex_unlock(&data->cmdlock);
+ return ret;
+}
+
+static int si1145_param_update(struct si1145_data *data, u8 op, u8 param, u8 value)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_PARAM_WR, value);
+ if (ret < 0)
+ return ret;
+
+ return si1145_command(data, op | (param & 0x1F));
+}
+
+static int si1145_param_set(struct si1145_data *data, u8 param, u8 value)
+{
+ return si1145_param_update(data, SI1145_CMD_PARAM_SET, param, value);
+}
+
+/* Set param. Returns negative errno or current value */
+static int si1145_param_query(struct si1145_data *data, u8 param)
+{
+ int ret;
+
+ ret = si1145_command(data, SI1145_CMD_PARAM_QUERY | (param & 0x1F));
+ if (ret < 0)
+ return ret;
+
+ return i2c_smbus_read_byte_data(data->client, SI1145_REG_PARAM_RD);
+}
+
+/* Expand 8 bit compressed value to 16 bit, see Silabs AN498 */
+static u16 si1145_uncompress(u8 x)
+{
+ u16 result = 0;
+ u8 exponent = 0;
+
+ if (x < 8)
+ return 0;
+
+ exponent = (x & 0xf0) >> 4;
+ result = 0x10 | (x & 0x0f);
+
+ if (exponent >= 4)
+ return result << (exponent - 4);
+ return result >> (4 - exponent);
+}
+
+/* Compress 16 bit value to 8 bit, see Silabs AN498 */
+static u8 si1145_compress(u16 x)
+{
+ u32 exponent = 0;
+ u32 significand = 0;
+ u32 tmp = x;
+
+ if (x == 0x0000)
+ return 0x00;
+ if (x == 0x0001)
+ return 0x08;
+
+ while (1) {
+ tmp >>= 1;
+ exponent += 1;
+ if (tmp == 1)
+ break;
+ }
+
+ if (exponent < 5) {
+ significand = x << (4 - exponent);
+ return (exponent << 4) | (significand & 0xF);
+ }
+
+ significand = x >> (exponent - 5);
+ if (significand & 1) {
+ significand += 2;
+ if (significand & 0x0040) {
+ exponent += 1;
+ significand >>= 1;
+ }
+ }
+
+ return (exponent << 4) | ((significand >> 1) & 0xF);
+}
+
+/* Write meas_rate in hardware */
+static int si1145_set_meas_rate(struct si1145_data *data, int interval)
+{
+ if (data->part_info->uncompressed_meas_rate)
+ return i2c_smbus_write_word_data(data->client,
+ SI1145_REG_MEAS_RATE, interval);
+ else
+ return i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_MEAS_RATE, interval);
+}
+
+static int si1145_read_samp_freq(struct si1145_data *data, int *val, int *val2)
+{
+ *val = 32000;
+ if (data->part_info->uncompressed_meas_rate)
+ *val2 = data->meas_rate;
+ else
+ *val2 = si1145_uncompress(data->meas_rate);
+ return IIO_VAL_FRACTIONAL;
+}
+
+/* Set the samp freq in driver private data */
+static int si1145_store_samp_freq(struct si1145_data *data, int val)
+{
+ int ret = 0;
+ int meas_rate;
+
+ if (val <= 0 || val > 32000)
+ return -ERANGE;
+ meas_rate = 32000 / val;
+
+ mutex_lock(&data->lock);
+ if (data->autonomous) {
+ ret = si1145_set_meas_rate(data, meas_rate);
+ if (ret)
+ goto out;
+ }
+ if (data->part_info->uncompressed_meas_rate)
+ data->meas_rate = meas_rate;
+ else
+ data->meas_rate = si1145_compress(meas_rate);
+
+out:
+ mutex_unlock(&data->lock);
+ return ret;
+}
+
+static irqreturn_t si1145_trigger_handler(int irq, void *private)
+{
+ struct iio_poll_func *pf = private;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct si1145_data *data = iio_priv(indio_dev);
+ /*
+ * Maximum buffer size:
+ * 6*2 bytes channels data + 4 bytes alignment +
+ * 8 bytes timestamp
+ */
+ u8 buffer[24];
+ int i, j = 0;
+ int ret;
+ u8 irq_status = 0;
+
+ if (!data->autonomous) {
+ ret = si1145_command(data, SI1145_CMD_PSALS_FORCE);
+ if (ret < 0 && ret != -EOVERFLOW)
+ goto done;
+ } else {
+ irq_status = ret = i2c_smbus_read_byte_data(data->client,
+ SI1145_REG_IRQ_STATUS);
+ if (ret < 0)
+ goto done;
+ if (!(irq_status & SI1145_MASK_ALL_IE))
+ goto done;
+ }
+
+ for_each_set_bit(i, indio_dev->active_scan_mask,
+ indio_dev->masklength) {
+ int run = 1;
+
+ while (i + run < indio_dev->masklength) {
+ if (!test_bit(i + run, indio_dev->active_scan_mask))
+ break;
+ if (indio_dev->channels[i + run].address !=
+ indio_dev->channels[i].address + 2 * run)
+ break;
+ run++;
+ }
+
+ ret = i2c_smbus_read_i2c_block_data_or_emulated(
+ data->client, indio_dev->channels[i].address,
+ sizeof(u16) * run, &buffer[j]);
+ if (ret < 0)
+ goto done;
+ j += run * sizeof(u16);
+ i += run - 1;
+ }
+
+ if (data->autonomous) {
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_IRQ_STATUS,
+ irq_status & SI1145_MASK_ALL_IE);
+ if (ret < 0)
+ goto done;
+ }
+
+ iio_push_to_buffers_with_timestamp(indio_dev, buffer,
+ iio_get_time_ns());
+
+done:
+ iio_trigger_notify_done(indio_dev->trig);
+ return IRQ_HANDLED;
+}
+
+static int si1145_set_chlist(struct iio_dev *indio_dev, unsigned long scan_mask)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ u8 reg = 0, mux;
+ int ret;
+ int i;
+
+ /* channel list already set, no need to reprogram */
+ if (data->scan_mask == scan_mask)
+ return 0;
+
+ for_each_set_bit(i, &scan_mask, indio_dev->masklength) {
+ switch (indio_dev->channels[i].address) {
+ case SI1145_REG_ALSVIS_DATA:
+ reg |= SI1145_CHLIST_EN_ALSVIS;
+ break;
+ case SI1145_REG_ALSIR_DATA:
+ reg |= SI1145_CHLIST_EN_ALSIR;
+ break;
+ case SI1145_REG_PS1_DATA:
+ reg |= SI1145_CHLIST_EN_PS1;
+ break;
+ case SI1145_REG_PS2_DATA:
+ reg |= SI1145_CHLIST_EN_PS2;
+ break;
+ case SI1145_REG_PS3_DATA:
+ reg |= SI1145_CHLIST_EN_PS3;
+ break;
+ case SI1145_REG_AUX_DATA:
+ switch (indio_dev->channels[i].type) {
+ case IIO_UVINDEX:
+ reg |= SI1145_CHLIST_EN_UV;
+ break;
+ default:
+ reg |= SI1145_CHLIST_EN_AUX;
+ if (indio_dev->channels[i].type == IIO_TEMP)
+ mux = SI1145_MUX_TEMP;
+ else
+ mux = SI1145_MUX_VDD;
+ ret = si1145_param_set(data,
+ SI1145_PARAM_AUX_ADC_MUX, mux);
+ if (ret < 0)
+ return ret;
+
+ break;
+ }
+ }
+ }
+
+ data->scan_mask = scan_mask;
+ ret = si1145_param_set(data, SI1145_PARAM_CHLIST, reg);
+
+ return ret < 0 ? ret : 0;
+}
+
+static int si1145_measure(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ u8 cmd;
+ int ret;
+
+ ret = si1145_set_chlist(indio_dev, BIT(chan->scan_index));
+ if (ret < 0)
+ return ret;
+
+ cmd = (chan->type == IIO_PROXIMITY) ? SI1145_CMD_PS_FORCE :
+ SI1145_CMD_ALS_FORCE;
+ ret = si1145_command(data, cmd);
+ if (ret < 0 && ret != -EOVERFLOW)
+ return ret;
+
+ return i2c_smbus_read_word_data(data->client, chan->address);
+}
+
+/*
+ * Conversion between iio scale and ADC_GAIN values
+ * These could be further adjusted but proximity/intensity are dimensionless
+ */
+static const int si1145_proximity_scale_available[] = {128,64,32,16,8,4};
+static const int si1145_intensity_scale_available[] = {128,64,32,16,8,4,2,1};
+static IIO_CONST_ATTR(in_proximity_scale_available, "128 64 32 16 8 4");
+static IIO_CONST_ATTR(in_intensity_scale_available, "128 64 32 16 8 4 2 1");
+static IIO_CONST_ATTR(in_intensity_ir_scale_available, "128 64 32 16 8 4 2 1");
+
+static int si1145_scale_from_adcgain(int regval)
+{
+ return 128 >> regval;
+}
+
+static int si1145_proximity_adcgain_from_scale(int val, int val2)
+{
+ val = find_closest_descending(val, si1145_proximity_scale_available,
+ ARRAY_SIZE(si1145_proximity_scale_available));
+ if (val < 0 || val > 5 || val2 != 0)
+ return -EINVAL;
+
+ return val;
+}
+
+static int si1145_intensity_adcgain_from_scale(int val, int val2)
+{
+ val = find_closest_descending(val, si1145_intensity_scale_available,
+ ARRAY_SIZE(si1145_intensity_scale_available));
+ if (val < 0 || val > 7 || val2 != 0)
+ return -EINVAL;
+
+ return val;
+}
+
+static int si1145_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ int ret;
+ u8 reg;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_INTENSITY:
+ case IIO_PROXIMITY:
+ case IIO_VOLTAGE:
+ case IIO_TEMP:
+ case IIO_UVINDEX:
+ if (iio_buffer_enabled(indio_dev))
+ return -EBUSY;
+
+ mutex_lock(&data->lock);
+ ret = si1145_measure(indio_dev, chan);
+ mutex_unlock(&data->lock);
+ if (ret < 0)
+ return ret;
+
+ *val = ret;
+
+ return IIO_VAL_INT;
+ case IIO_CURRENT:
+ ret = i2c_smbus_read_byte_data(data->client,
+ SI1145_PS_LED_REG(chan->channel));
+ if (ret < 0)
+ return ret;
+
+ *val = (ret >> SI1145_PS_LED_SHIFT(chan->channel))
+ & 0x0f;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ reg = SI1145_PARAM_PS_ADC_GAIN;
+ break;
+ case IIO_INTENSITY:
+ if (chan->channel2 == IIO_MOD_LIGHT_IR)
+ reg = SI1145_PARAM_ALSIR_ADC_GAIN;
+ else
+ reg = SI1145_PARAM_ALSVIS_ADC_GAIN;
+ break;
+ case IIO_TEMP:
+ *val = 28;
+ *val2 = 571429;
+ return IIO_VAL_INT_PLUS_MICRO;
+ case IIO_UVINDEX:
+ *val = 0;
+ *val2 = 10000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+
+ ret = si1145_param_query(data, reg);
+ if (ret < 0)
+ return ret;
+
+ *val = si1145_scale_from_adcgain(ret & 0x07);
+
+ return IIO_VAL_INT;
+ case IIO_CHAN_INFO_OFFSET:
+ switch (chan->type) {
+ case IIO_TEMP:
+ /* -ADC offset - ADC counts @ 25°C - 35 * ADC counts / °C */
+ *val = -256 - 11136 + 25 * 35;
+ return IIO_VAL_INT;
+ default:
+ /*
+ * All ADC measurements have are by default offset by -256
+ * See AN498 5.6.3
+ */
+ ret = si1145_param_query(data, SI1145_PARAM_ADC_OFFSET);
+ if (ret < 0)
+ return ret;
+ *val = -si1145_uncompress(ret);
+ return IIO_VAL_INT;
+ }
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return si1145_read_samp_freq(data, val, val2);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int si1145_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ u8 reg1, reg2, shift;
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_PROXIMITY:
+ val = si1145_proximity_adcgain_from_scale(val, val2);
+ if (val < 0)
+ return val;
+ reg1 = SI1145_PARAM_PS_ADC_GAIN;
+ reg2 = SI1145_PARAM_PS_ADC_COUNTER;
+ break;
+ case IIO_INTENSITY:
+ val = si1145_intensity_adcgain_from_scale(val, val2);
+ if (val < 0)
+ return val;
+ if (chan->channel2 == IIO_MOD_LIGHT_IR) {
+ reg1 = SI1145_PARAM_ALSIR_ADC_GAIN;
+ reg2 = SI1145_PARAM_ALSIR_ADC_COUNTER;
+ } else {
+ reg1 = SI1145_PARAM_ALSVIS_ADC_GAIN;
+ reg2 = SI1145_PARAM_ALSVIS_ADC_COUNTER;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = si1145_param_set(data, reg1, val);
+ if (ret < 0)
+ return ret;
+ /* Set recovery period to one's complement of gain */
+ return si1145_param_set(data, reg2, (~val & 0x07) << 4);
+ case IIO_CHAN_INFO_RAW:
+ if (chan->type != IIO_CURRENT)
+ return -EINVAL;
+
+ if (val < 0 || val > 15 || val2 != 0)
+ return -EINVAL;
+
+ reg1 = SI1145_PS_LED_REG(chan->channel);
+ shift = SI1145_PS_LED_SHIFT(chan->channel);
+ ret = i2c_smbus_read_byte_data(data->client, reg1);
+ if (ret < 0)
+ return ret;
+ return i2c_smbus_write_byte_data(data->client, reg1,
+ (ret & ~(0x0f << shift)) |
+ ((val & 0x0f) << shift));
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return si1145_store_samp_freq(data, val);
+ }
+ return -EINVAL;
+}
+
+#define SI1145_ST { \
+ .sign = 'u', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_LE, \
+}
+
+#define SI1145_INTENSITY_CHANNEL(_si) { \
+ .type = IIO_INTENSITY, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_OFFSET) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_type = SI1145_ST, \
+ .scan_index = _si, \
+ .address = SI1145_REG_ALSVIS_DATA, \
+}
+
+#define SI1145_INTENSITY_IR_CHANNEL(_si) { \
+ .type = IIO_INTENSITY, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_OFFSET) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .modified = 1, \
+ .channel2 = IIO_MOD_LIGHT_IR, \
+ .scan_type = SI1145_ST, \
+ .scan_index = _si, \
+ .address = SI1145_REG_ALSIR_DATA, \
+}
+
+#define SI1145_TEMP_CHANNEL(_si) { \
+ .type = IIO_TEMP, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_OFFSET) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_type = SI1145_ST, \
+ .scan_index = _si, \
+ .address = SI1145_REG_AUX_DATA, \
+}
+
+#define SI1145_UV_CHANNEL(_si) { \
+ .type = IIO_UVINDEX, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
+ BIT(IIO_CHAN_INFO_SCALE), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_type = SI1145_ST, \
+ .scan_index = _si, \
+ .address = SI1145_REG_AUX_DATA, \
+}
+
+#define SI1145_PROXIMITY_CHANNEL(_si, _ch) { \
+ .type = IIO_PROXIMITY, \
+ .indexed = 1, \
+ .channel = _ch, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_OFFSET), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_type = SI1145_ST, \
+ .scan_index = _si, \
+ .address = SI1145_REG_PS1_DATA + _ch * 2, \
+}
+
+#define SI1145_VOLTAGE_CHANNEL(_si) { \
+ .type = IIO_VOLTAGE, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_type = SI1145_ST, \
+ .scan_index = _si, \
+ .address = SI1145_REG_AUX_DATA, \
+}
+
+#define SI1145_CURRENT_CHANNEL(_ch) { \
+ .type = IIO_CURRENT, \
+ .indexed = 1, \
+ .channel = _ch, \
+ .output = 1, \
+ .scan_index = -1, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+}
+
+static const struct iio_chan_spec si1132_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_TEMP_CHANNEL(2),
+ SI1145_VOLTAGE_CHANNEL(3),
+ SI1145_UV_CHANNEL(4),
+ IIO_CHAN_SOFT_TIMESTAMP(6),
+};
+
+static const struct iio_chan_spec si1141_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_PROXIMITY_CHANNEL(2, 0),
+ SI1145_TEMP_CHANNEL(3),
+ SI1145_VOLTAGE_CHANNEL(4),
+ IIO_CHAN_SOFT_TIMESTAMP(5),
+ SI1145_CURRENT_CHANNEL(0),
+};
+
+static const struct iio_chan_spec si1142_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_PROXIMITY_CHANNEL(2, 0),
+ SI1145_PROXIMITY_CHANNEL(3, 1),
+ SI1145_TEMP_CHANNEL(4),
+ SI1145_VOLTAGE_CHANNEL(5),
+ IIO_CHAN_SOFT_TIMESTAMP(6),
+ SI1145_CURRENT_CHANNEL(0),
+ SI1145_CURRENT_CHANNEL(1),
+};
+
+static const struct iio_chan_spec si1143_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_PROXIMITY_CHANNEL(2, 0),
+ SI1145_PROXIMITY_CHANNEL(3, 1),
+ SI1145_PROXIMITY_CHANNEL(4, 2),
+ SI1145_TEMP_CHANNEL(5),
+ SI1145_VOLTAGE_CHANNEL(6),
+ IIO_CHAN_SOFT_TIMESTAMP(7),
+ SI1145_CURRENT_CHANNEL(0),
+ SI1145_CURRENT_CHANNEL(1),
+ SI1145_CURRENT_CHANNEL(2),
+};
+
+static const struct iio_chan_spec si1145_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_PROXIMITY_CHANNEL(2, 0),
+ SI1145_TEMP_CHANNEL(3),
+ SI1145_VOLTAGE_CHANNEL(4),
+ SI1145_UV_CHANNEL(5),
+ IIO_CHAN_SOFT_TIMESTAMP(6),
+ SI1145_CURRENT_CHANNEL(0),
+};
+
+static const struct iio_chan_spec si1146_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_TEMP_CHANNEL(2),
+ SI1145_VOLTAGE_CHANNEL(3),
+ SI1145_UV_CHANNEL(4),
+ SI1145_PROXIMITY_CHANNEL(5, 0),
+ SI1145_PROXIMITY_CHANNEL(6, 1),
+ IIO_CHAN_SOFT_TIMESTAMP(7),
+ SI1145_CURRENT_CHANNEL(0),
+ SI1145_CURRENT_CHANNEL(1),
+};
+
+static const struct iio_chan_spec si1147_channels[] = {
+ SI1145_INTENSITY_CHANNEL(0),
+ SI1145_INTENSITY_IR_CHANNEL(1),
+ SI1145_PROXIMITY_CHANNEL(2, 0),
+ SI1145_PROXIMITY_CHANNEL(3, 1),
+ SI1145_PROXIMITY_CHANNEL(4, 2),
+ SI1145_TEMP_CHANNEL(5),
+ SI1145_VOLTAGE_CHANNEL(6),
+ SI1145_UV_CHANNEL(7),
+ IIO_CHAN_SOFT_TIMESTAMP(8),
+ SI1145_CURRENT_CHANNEL(0),
+ SI1145_CURRENT_CHANNEL(1),
+ SI1145_CURRENT_CHANNEL(2),
+};
+
+static struct attribute *si1132_attributes[] = {
+ &iio_const_attr_in_intensity_scale_available.dev_attr.attr,
+ &iio_const_attr_in_intensity_ir_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static struct attribute *si114x_attributes[] = {
+ &iio_const_attr_in_intensity_scale_available.dev_attr.attr,
+ &iio_const_attr_in_intensity_ir_scale_available.dev_attr.attr,
+ &iio_const_attr_in_proximity_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group si1132_attribute_group = {
+ .attrs = si1132_attributes,
+};
+
+static const struct attribute_group si114x_attribute_group = {
+ .attrs = si114x_attributes,
+};
+
+
+static const struct iio_info si1132_info = {
+ .read_raw = si1145_read_raw,
+ .write_raw = si1145_write_raw,
+ .driver_module = THIS_MODULE,
+ .attrs = &si1132_attribute_group,
+};
+
+static const struct iio_info si114x_info = {
+ .read_raw = si1145_read_raw,
+ .write_raw = si1145_write_raw,
+ .driver_module = THIS_MODULE,
+ .attrs = &si114x_attribute_group,
+};
+
+#define SI1145_PART(id, iio_info, chans, leds, uncompressed_meas_rate) \
+ {id, iio_info, chans, ARRAY_SIZE(chans), leds, uncompressed_meas_rate}
+
+static const struct si1145_part_info si1145_part_info[] = {
+ [SI1132] = SI1145_PART(0x32, &si1132_info, si1132_channels, 0, true),
+ [SI1141] = SI1145_PART(0x41, &si114x_info, si1141_channels, 1, false),
+ [SI1142] = SI1145_PART(0x42, &si114x_info, si1142_channels, 2, false),
+ [SI1143] = SI1145_PART(0x43, &si114x_info, si1143_channels, 3, false),
+ [SI1145] = SI1145_PART(0x45, &si114x_info, si1145_channels, 1, true),
+ [SI1146] = SI1145_PART(0x46, &si114x_info, si1146_channels, 2, true),
+ [SI1147] = SI1145_PART(0x47, &si114x_info, si1147_channels, 3, true),
+};
+
+static int si1145_initialize(struct si1145_data *data)
+{
+ struct i2c_client *client = data->client;
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(client, SI1145_REG_COMMAND,
+ SI1145_CMD_RESET);
+ if (ret < 0)
+ return ret;
+ msleep(20);
+
+ /* Hardware key, magic value */
+ ret = i2c_smbus_write_byte_data(client, SI1145_REG_HW_KEY, 0x17);
+ if (ret < 0)
+ return ret;
+ msleep(20);
+
+ /* Turn off autonomous mode */
+ ret = si1145_set_meas_rate(data, 0);
+ if (ret < 0)
+ return ret;
+
+ /* Initialize sampling freq to 10hz */
+ ret = si1145_store_samp_freq(data, 10);
+ if (ret < 0)
+ return ret;
+
+ /* Set LED currents to 45 mA */
+ switch (data->part_info->num_leds) {
+ case 1:
+ ret = i2c_smbus_write_byte_data(client,
+ SI1145_REG_PS_LED21, 0x03);
+ break;
+ case 2:
+ ret = i2c_smbus_write_byte_data(client,
+ SI1145_REG_PS_LED21, 0x43);
+ break;
+ case 3:
+ ret = i2c_smbus_write_byte_data(client,
+ SI1145_REG_PS_LED3, 0x03);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(client,
+ SI1145_REG_PS_LED21, 0x43);
+ break;
+ default:
+ ret = 0;
+ break;
+ }
+ if (ret < 0)
+ return ret;
+
+ /* Set normal proximity measurement mode */
+ ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_MISC, 0x04);
+ if (ret < 0)
+ return ret;
+
+ ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_GAIN, 0x01);
+ if (ret < 0)
+ return ret;
+
+ ret = si1145_param_set(data, SI1145_PARAM_PS_ADC_COUNTER, 0x03 << 4);
+ if (ret < 0)
+ return ret;
+
+ /* Set ALS visible measurement mode */
+ ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_MISC, SI1145_ADC_MISC_RANGE);
+ if (ret < 0)
+ return ret;
+
+ ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_GAIN, 0x03);
+ if (ret < 0)
+ return ret;
+
+ ret = si1145_param_set(data, SI1145_PARAM_ALSVIS_ADC_COUNTER, 0x04 << 4);
+ if (ret < 0)
+ return ret;
+
+ /* Set ALS IR measurement mode */
+ ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_MISC, SI1145_ADC_MISC_RANGE);
+ if (ret < 0)
+ return ret;
+
+ ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_GAIN, 0x01);
+ if (ret < 0)
+ return ret;
+
+ ret = si1145_param_set(data, SI1145_PARAM_ALSIR_ADC_COUNTER, 0x00 << 4);
+ if (ret < 0)
+ return ret;
+
+ /*
+ * Initialize UCOEF to default values in datasheet
+ * These registers are normally zero on reset
+ */
+ if (data->part_info->part == 0x32 ||
+ data->part_info->part == 0x45 ||
+ data->part_info->part == 0x46 ||
+ data->part_info->part == 0x47)
+ {
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_UCOEF1, SI1145_UCOEF1_DEFAULT);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_UCOEF2, SI1145_UCOEF2_DEFAULT);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_UCOEF3, SI1145_UCOEF3_DEFAULT);
+ if (ret < 0)
+ return ret;
+ ret = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_UCOEF4, SI1145_UCOEF4_DEFAULT);
+ if (ret < 0)
+ return ret;
+ }
+
+ return 0;
+}
+
+static int si1145_buffer_preenable(struct iio_dev *indio_dev)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&data->lock);
+ ret = si1145_set_chlist(indio_dev, *indio_dev->active_scan_mask);
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+bool si1145_validate_scan_mask(struct iio_dev *indio_dev,
+ const unsigned long *scan_mask)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ unsigned int count = 0;
+ int i;
+
+ /* Check that at most one AUX channel is enabled */
+ for_each_set_bit(i, scan_mask, data->part_info->num_channels) {
+ if (indio_dev->channels[i].address == SI1145_REG_AUX_DATA)
+ count++;
+ }
+
+ return count <= 1;
+}
+
+static const struct iio_buffer_setup_ops si1145_buffer_setup_ops = {
+ .preenable = si1145_buffer_preenable,
+ .postenable = iio_triggered_buffer_postenable,
+ .predisable = iio_triggered_buffer_predisable,
+ .validate_scan_mask = si1145_validate_scan_mask,
+};
+
+/**
+ * si1145_trigger_set_state() - Set trigger state
+ *
+ * When not using triggers interrupts are disabled and measurement rate is
+ * set to zero in order to minimize power consumption.
+ */
+static int si1145_trigger_set_state(struct iio_trigger *trig, bool state)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+ struct si1145_data *data = iio_priv(indio_dev);
+ int err = 0, ret;
+
+ mutex_lock(&data->lock);
+
+ if (state) {
+ data->autonomous = true;
+ err = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_INT_CFG, SI1145_INT_CFG_OE);
+ if (err < 0)
+ goto disable;
+ err = i2c_smbus_write_byte_data(data->client,
+ SI1145_REG_IRQ_ENABLE, SI1145_MASK_ALL_IE);
+ if (err < 0)
+ goto disable;
+ err = si1145_set_meas_rate(data, data->meas_rate);
+ if (err < 0)
+ goto disable;
+ err = si1145_command(data, SI1145_CMD_PSALS_AUTO);
+ if (err < 0)
+ goto disable;
+ } else {
+disable:
+ /* Disable as much as possible skipping errors */
+ ret = si1145_command(data, state ? SI1145_CMD_PSALS_AUTO : SI1145_CMD_PSALS_PAUSE);
+ if (ret < 0 && !err)
+ err = ret;
+ ret = si1145_set_meas_rate(data, 0);
+ if (ret < 0 && !err)
+ err = ret;
+ ret = i2c_smbus_write_byte_data(data->client, SI1145_REG_IRQ_ENABLE, 0);
+ if (ret < 0 && !err)
+ err = ret;
+ ret = i2c_smbus_write_byte_data(data->client, SI1145_REG_INT_CFG, 0);
+ if (ret < 0 && !err)
+ err = ret;
+ data->autonomous = false;
+ }
+
+ mutex_unlock(&data->lock);
+ return err;
+}
+
+static const struct iio_trigger_ops si1145_trigger_ops = {
+ .owner = THIS_MODULE,
+ .set_trigger_state = si1145_trigger_set_state,
+};
+
+static int si1145_probe_trigger(struct iio_dev *indio_dev)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+ int ret;
+
+ data->trig = devm_iio_trigger_alloc(&data->client->dev,
+ "%s-dev%d", indio_dev->name, indio_dev->id);
+ if (!data->trig)
+ return -ENOMEM;
+
+ data->trig->dev.parent = &data->client->dev;
+ data->trig->ops = &si1145_trigger_ops;
+ iio_trigger_set_drvdata(data->trig, indio_dev);
+ ret = iio_trigger_register(data->trig);
+ if (ret)
+ return ret;
+
+ ret = request_irq(client->irq,
+ iio_trigger_generic_data_rdy_poll,
+ IRQF_TRIGGER_FALLING,
+ "si1145_irq",
+ data->trig);
+ if (ret < 0) {
+ dev_err(&client->dev, "irq request failed\n");
+ iio_trigger_unregister(data->trig);
+ return ret;
+ }
+
+ indio_dev->trig = data->trig;
+ return 0;
+}
+
+static void si1145_remove_trigger(struct iio_dev *indio_dev)
+{
+ struct si1145_data *data = iio_priv(indio_dev);
+ struct i2c_client *client = data->client;
+
+ if (data->trig) {
+ free_irq(client->irq, data->trig);
+ iio_trigger_unregister(data->trig);
+ data->trig = NULL;
+ }
+}
+
+static int si1145_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct si1145_data *data;
+ struct iio_dev *indio_dev;
+ u8 part_id, rev_id, seq_id;
+ 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;
+ data->part_info = &si1145_part_info[id->driver_data];
+
+ part_id = ret = i2c_smbus_read_byte_data(data->client, SI1145_REG_PART_ID);
+ if (ret < 0)
+ return ret;
+ rev_id = ret = i2c_smbus_read_byte_data(data->client, SI1145_REG_REV_ID);
+ if (ret < 0)
+ return ret;
+ seq_id = ret = i2c_smbus_read_byte_data(data->client, SI1145_REG_SEQ_ID);
+ if (ret < 0)
+ return ret;
+ dev_info(&client->dev, "Device ID part %#02hhx rev %#02hhx seq %#02hhx\n",
+ part_id, rev_id, seq_id);
+ if (part_id != data->part_info->part) {
+ dev_err(&client->dev, "part ID mismatch got %#02hhx expected %#02x\n",
+ part_id, data->part_info->part);
+ return -ENODEV;
+ }
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->name = id->name;
+ indio_dev->channels = data->part_info->channels;
+ indio_dev->num_channels = data->part_info->num_channels;
+ indio_dev->info = data->part_info->iio_info;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ mutex_init(&data->lock);
+ mutex_init(&data->cmdlock);
+
+ ret = si1145_initialize(data);
+ if (ret < 0)
+ return ret;
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ si1145_trigger_handler, &si1145_buffer_setup_ops);
+ if (ret < 0)
+ return ret;
+
+ if (client->irq) {
+ ret = si1145_probe_trigger(indio_dev);
+ if (ret < 0)
+ goto error_free_buffer;
+ } else {
+ dev_info(&client->dev, "no irq, using polling\n");
+ }
+
+ ret = iio_device_register(indio_dev);
+ if (ret < 0)
+ goto error_free_trigger;
+
+ return 0;
+
+error_free_trigger:
+ si1145_remove_trigger(indio_dev);
+error_free_buffer:
+ iio_triggered_buffer_cleanup(indio_dev);
+ return ret;
+}
+
+static const struct i2c_device_id si1145_ids[] = {
+ { "si1132", SI1132 },
+ { "si1141", SI1141 },
+ { "si1142", SI1142 },
+ { "si1143", SI1143 },
+ { "si1145", SI1145 },
+ { "si1146", SI1146 },
+ { "si1147", SI1147 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, si1145_ids);
+
+static int si1145_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+
+ si1145_remove_trigger(indio_dev);
+ iio_triggered_buffer_cleanup(indio_dev);
+ iio_device_unregister(indio_dev);
+
+ return 0;
+}
+
+static struct i2c_driver si1145_driver = {
+ .driver = {
+ .name = "si1145",
+ .owner = THIS_MODULE,
+ },
+ .probe = si1145_probe,
+ .remove = si1145_remove,
+ .id_table = si1145_ids,
+};
+
+module_i2c_driver(si1145_driver);
+
+MODULE_AUTHOR("Peter Meerwald-Stadler <pmeerw@...erw.net>");
+MODULE_DESCRIPTION("Silabs SI1132 and SI1141/2/3/5/6/7 proximity, ambient light and UV index sensor driver");
+MODULE_LICENSE("GPL");
--
2.5.5
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