Signed-off-by: Maxime Roussin-Bélanger <maxime.roussinbelanger@xxxxxxxxx>
Reviewed-by: Jean-Francois Dagenais <dagenaisj@xxxxxxxxxxxx>
---
drivers/iio/light/Kconfig | 11 +
drivers/iio/light/Makefile | 1 +
drivers/iio/light/si1133.c | 835 +++++++++++++++++++++++++++++++++++++
3 files changed, 847 insertions(+)
create mode 100644 drivers/iio/light/si1133.c
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index 2356ed9285df..4ca3911c1449 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -322,6 +322,17 @@ config SI1145
To compile this driver as a module, choose M here: the module will be
called si1145.
+config SI1133
+ tristate "SI1133 UV Index Sensor and Ambient Light Sensor"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Say Y here if you want to build a driver for the Silicon Labs SI1133
+ UV Index Sensor and Ambient Light Sensor chip.
+
+ To compile this driver as a module, choose M here: the module will be
+ called si1133.
+
config STK3310
tristate "STK3310 ALS and proximity sensor"
depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index fa32fa459e2e..23ccd38291ec 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_PA12203001) += pa12203001.o
obj-$(CONFIG_RPR0521) += rpr0521.o
obj-$(CONFIG_SENSORS_TSL2563) += tsl2563.o
obj-$(CONFIG_SI1145) += si1145.o
+obj-$(CONFIG_SI1133) += si1133.o
obj-$(CONFIG_STK3310) += stk3310.o
obj-$(CONFIG_TCS3414) += tcs3414.o
obj-$(CONFIG_TCS3472) += tcs3472.o
diff --git a/drivers/iio/light/si1133.c b/drivers/iio/light/si1133.c
new file mode 100644
index 000000000000..62e62e2dea1b
--- /dev/null
+++ b/drivers/iio/light/si1133.c
@@ -0,0 +1,835 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * si1133.c - Support for Silabs SI1133 combined ambient
+ * light and UV index sensors
+ *
+ * Copyright 2018 Maxime Roussin-Belanger <maxime.roussinbelanger@xxxxxxxxx>
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/regmap.h>
+
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+#include <linux/util_macros.h>
+
+#define SI1133_REG_PART_ID 0x00
+#define SI1133_REG_REV_ID 0x01
+#define SI1133_REG_MFR_ID 0x02
+#define SI1133_REG_INFO0 0x03
+#define SI1133_REG_INFO1 0x04
+
+#define SI1133_REG_HOSTIN0 0x0A
+#define SI1133_REG_COMMAND 0x0B
+#define SI1133_REG_IRQ_ENABLE 0x0F
+#define SI1133_REG_RESPONSE1 0x10
+#define SI1133_REG_RESPONSE0 0x11
+#define SI1133_REG_IRQ_STATUS 0x12
+#define SI1133_REG_MEAS_RATE 0x1A
+
+#define SI1133_CMD_RESET_CTR 0x00
+#define SI1133_CMD_RESET_SW 0x01
+#define SI1133_CMD_FORCE 0x11
+#define SI1133_CMD_START_AUTONOMOUS 0x13
+#define SI1133_CMD_PARAM_SET 0x80
+#define SI1133_CMD_PARAM_QUERY 0x40
+#define SI1133_CMD_PARAM_MASK 0x3F
+
+#define SI1133_CMD_ERR_MASK BIT(4)
+#define SI1133_CMD_SEQ_MASK 0xF
+
+#define SI1133_PARAM_REG_CHAN_LIST 0x01
+#define SI1133_PARAM_REG_ADCCONFIG(x) (((x) * 4) + 2)
+#define SI1133_PARAM_REG_ADCSENS(x) (((x) * 4) + 3)
+
+#define SI1133_ADCMUX_MASK 0x1F
+#define SI1133_ADCSENS_SCALE_MASK 0x70
+#define SI1133_ADCSENS_SCALE_SHIFT 4
+
+#define SI1133_ADCSENS_HSIG_MASK 0x80
+#define SI1133_ADCSENS_HSIG_SHIFT 7
+
+#define SI1133_ADCSENS_HW_GAIN_MASK 0xF
+
+#define SI1133_PARAM_ADCMUX_SMALL_IR 0x0
+#define SI1133_PARAM_ADCMUX_MED_IR 0x1
+#define SI1133_PARAM_ADCMUX_LARGE_IR 0x2
+#define SI1133_PARAM_ADCMUX_WHITE 0xB
+#define SI1133_PARAM_ADCMUX_LARGE_WHITE 0xD
+#define SI1133_PARAM_ADCMUX_UV 0x18
+#define SI1133_PARAM_ADCMUX_UV_DEEP 0x19
+
+#define SI1133_ERR_INVALID_CMD 0x0
+#define SI1133_ERR_INVALID_LOCATION_CMD 0x1
+#define SI1133_ERR_SATURATION_ADC_OR_OVERFLOW_ACCUMULATION 0x2
+#define SI1133_ERR_OUTPUT_BUFFER_OVERFLOW 0x3
+
+#define SI1133_CMD_MINSLEEP_US_LOW 5000
+#define SI1133_CMD_MINSLEEP_US_HIGH 7500
+#define SI1133_CMD_TIMEOUT_MS 25
+#define SI1133_MAX_RETRIES 25
+
+#define SI1133_REG_HOSTOUT(x) ((x) + 0x13)
+
+#define SI1133_MAX_CMD_CTR 0xF
+
+#define SI1133_MEASUREMENT_FREQUENCY 1250
+
+static const int si1133_scale_available[] = {
+ 1, 2, 4, 8, 16, 32, 64, 128};
+
+static IIO_CONST_ATTR(scale_available, "1 2 4 8 16 32 64 128");
+
+static IIO_CONST_ATTR_INT_TIME_AVAIL("0.0244 0.0488 0.0975 0.195 0.390 0.780 "
+ "1.560 3.120 6.24 12.48 25.0 50.0");
+/* Integration time in milliseconds, nanoseconds */
+static const int si1133_int_time_table[][2] = {
+ {0, 24400}, {0, 48800}, {0, 97500}, {0, 195000},
+ {0, 390000}, {0, 780000}, {1, 560000}, {3, 120000},
+ {6, 240000}, {12, 480000}, {25, 000000}, {50, 000000},
+};
+
+static const struct regmap_range si1133_reg_ranges[] = {
+ regmap_reg_range(0x00, 0x02),
+ regmap_reg_range(0x0A, 0x0B),
+ regmap_reg_range(0x0F, 0x0F),
+ regmap_reg_range(0x10, 0x12),
+ regmap_reg_range(0x13, 0x2C),
+};
+
+static const struct regmap_range si1133_reg_ro_ranges[] = {
+ regmap_reg_range(0x00, 0x02),
+ regmap_reg_range(0x10, 0x2C),
+};
+
+static const struct regmap_range si1133_precious_ranges[] = {
+ regmap_reg_range(0x12, 0x12),
+};
+
+static const struct regmap_access_table si1133_write_ranges_table = {
+ .yes_ranges = si1133_reg_ranges,
+ .n_yes_ranges = ARRAY_SIZE(si1133_reg_ranges),
+ .no_ranges = si1133_reg_ro_ranges,
+ .n_no_ranges = ARRAY_SIZE(si1133_reg_ro_ranges),
+};
+
+static const struct regmap_access_table si1133_read_ranges_table = {
+ .yes_ranges = si1133_reg_ranges,
+ .n_yes_ranges = ARRAY_SIZE(si1133_reg_ranges),
+};
+
+static const struct regmap_access_table si1133_precious_table = {
+ .yes_ranges = si1133_precious_ranges,
+ .n_yes_ranges = ARRAY_SIZE(si1133_precious_ranges),
+};
+
+static const struct regmap_config si1133_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = 0x2C,
+
+ .wr_table = &si1133_write_ranges_table,
+ .rd_table = &si1133_read_ranges_table,
+
+ .precious_table = &si1133_precious_table,
+};
+
+/**
+ * struct si1133_part_info - si1133 chip info
+ * @part: part number
+ * @iio_info callbacks
+ * @channels: list of channels
+ * @num_channels: number of channels
+ */
+struct si1133_part_info {
+ u8 part;
+ const struct iio_info *iio_info;
+ const struct iio_chan_spec *channels;
+ unsigned int num_channels;
+};
+
+struct si1133_data {
+ struct regmap *regmap;
+ struct i2c_client *client;
+ const struct si1133_part_info *part_info;
+
+ struct mutex mutex;
+
+ int rsp_seq;
+ unsigned long scan_mask;
+ unsigned int adc_sens;
+ unsigned int adc_config;
+ unsigned int meas_rate;
+
+ struct completion completion;
+};
+
+/**
+ * si1133_cmd_reset_sw() - Reset the chip
+ *
+ * Wait till command reset completes or timeout
+ */
+static int si1133_cmd_reset_sw(struct si1133_data *data)
+{
+ struct device *dev = &data->client->dev;
+ unsigned int resp;
+ unsigned long timeout;
+ int err;
+
+ err = regmap_write(data->regmap, SI1133_REG_COMMAND,
+ SI1133_CMD_RESET_SW);
+ if (err)
+ return err;
+
+ timeout = jiffies + msecs_to_jiffies(SI1133_CMD_TIMEOUT_MS);
+ while (true) {
+ err = regmap_read(data->regmap, SI1133_REG_RESPONSE0, &resp);
+ if (err == -ENXIO) {
+ usleep_range(SI1133_CMD_MINSLEEP_US_LOW,
+ SI1133_CMD_MINSLEEP_US_HIGH);
+ continue;
+ }
+
+ if ((resp & SI1133_MAX_CMD_CTR) == SI1133_MAX_CMD_CTR)
+ break;
+
+ if (time_after(jiffies, timeout)) {
+ dev_warn(dev, "timeout on reset ctr resp: %d\n", resp);
+ return -ETIMEDOUT;
+ }
+ }
+
+ if (!err)
+ data->rsp_seq = SI1133_MAX_CMD_CTR;
+
+ return err;
+}
+
+static int si1133_parse_response_err(struct device *dev, unsigned int resp,
+ u8 cmd)
+{
+ int ret = 0;
+
+ resp &= 0xF;
+
+ switch (resp) {
+ case SI1133_ERR_OUTPUT_BUFFER_OVERFLOW:
+ dev_warn(dev, "Output buffer overflow: %#02hhx\n", cmd);
+ ret = -EOVERFLOW;
+ break;
+ case SI1133_ERR_SATURATION_ADC_OR_OVERFLOW_ACCUMULATION:
+ dev_warn(dev, "Saturation of the ADC or overflow of accumulation: %#02hhx\n",
+ cmd);
+ ret = -EOVERFLOW;
+ break;
+ case SI1133_ERR_INVALID_LOCATION_CMD:
+ dev_warn(dev, "Parameter access to an invalid location: %#02hhx\n",
+ cmd);
+ ret = -EINVAL;
+ break;
+ case SI1133_ERR_INVALID_CMD:
+ dev_warn(dev, "Invalid command %#02hhx\n", cmd);
+ ret = -EINVAL;
+ break;
+ default:
+ dev_warn(dev, "Unknown error %#02hhx\n", cmd);
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int si1133_cmd_reset_counter(struct si1133_data *data)
+{
+ int err = regmap_write(data->regmap, SI1133_REG_COMMAND,
+ SI1133_CMD_RESET_CTR);
+ if (err)
+ return err;
+
+ data->rsp_seq = 0;
+
+ return 0;
+}
+
+static int si1133_command(struct si1133_data *data, u8 cmd)
+{
+ struct device *dev = &data->client->dev;
+ unsigned int resp;
+ int err;
+ int expected_seq;
+
+ mutex_lock(&data->mutex);
+
+ expected_seq = (data->rsp_seq + 1) & SI1133_MAX_CMD_CTR;
+
+ err = regmap_write(data->regmap, SI1133_REG_COMMAND, cmd);
+ if (err) {
+ dev_warn(dev, "failed to write command %#02hhx, ret=%d\n", cmd,
+ err);
+ goto out;
+ }
+
+ err = regmap_read_poll_timeout(data->regmap, SI1133_REG_RESPONSE0, resp,
+ (resp & SI1133_CMD_SEQ_MASK) ==
+ expected_seq ||
+ (resp & SI1133_CMD_ERR_MASK),
+ SI1133_CMD_MINSLEEP_US_LOW,
+ SI1133_CMD_TIMEOUT_MS * 1000);
+
+ if (resp & SI1133_CMD_ERR_MASK) {
+ err = si1133_parse_response_err(dev, resp, cmd);
+ si1133_cmd_reset_counter(data);
+ } else {
+ data->rsp_seq = resp & SI1133_CMD_SEQ_MASK;
+ }
+
+out:
+ mutex_unlock(&data->mutex);
+
+ return err;
+}
+
+static int si1133_param_set(struct si1133_data *data, u8 param,
+ unsigned int value)
+{
+ int err = regmap_write(data->regmap, SI1133_REG_HOSTIN0, value);
+
+ if (err)
+ return err;
+
+ return si1133_command(data, SI1133_CMD_PARAM_SET |
+ (param & SI1133_CMD_PARAM_MASK));
+}
+
+static int si1133_param_query(struct si1133_data *data, u8 param,
+ unsigned int *result)
+{
+ int err = si1133_command(data, SI1133_CMD_PARAM_QUERY |
+ (param & SI1133_CMD_PARAM_MASK));
+ if (err)
+ return err;
+
+ return regmap_read(data->regmap, SI1133_REG_RESPONSE1, result);
+}
+
+#define SI1133_ST { \
+ .sign = 'u', \
+ .realbits = 16, \
+ .storagebits = 16, \
+ .endianness = IIO_LE, \
+ }
+
+#define SI1133_CHANNEL(_si, _ch, _type) \
+ .type = IIO_LIGHT, \
+ .indexed = 1, \
+ .channel = _ch, \
+ .scan_index = _si, \
+ .scan_type = SI1133_ST, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ) | \
+ BIT(IIO_CHAN_INFO_INT_TIME) | \
+ BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_HARDWAREGAIN), \
+
+static const struct iio_chan_spec si1133_channels[] = {
+ {
+ SI1133_CHANNEL(0, SI1133_PARAM_ADCMUX_WHITE, IIO_LIGHT)
+ },
+ {
+ SI1133_CHANNEL(1, SI1133_PARAM_ADCMUX_LARGE_WHITE, IIO_LIGHT)
+ .extend_name = "large",
+ },
+ {
+ SI1133_CHANNEL(2, SI1133_PARAM_ADCMUX_SMALL_IR, IIO_LIGHT)
+ .extend_name = "small",
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ },
+ {
+ SI1133_CHANNEL(3, SI1133_PARAM_ADCMUX_MED_IR, IIO_LIGHT)
+ .extend_name = "med",
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ },
+ {
+ SI1133_CHANNEL(4, SI1133_PARAM_ADCMUX_LARGE_IR, IIO_LIGHT)
+ .extend_name = "large",
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ },
+ {
+ SI1133_CHANNEL(5, SI1133_PARAM_ADCMUX_UV, IIO_UVINDEX)
+ },
+ {
+ SI1133_CHANNEL(6, SI1133_PARAM_ADCMUX_UV_DEEP, IIO_UVINDEX)
+ .extend_name = "deep",
+ }
+};
+
+static int si1133_read_samp_freq(struct si1133_data *data, int *val, int *val2)
+{
+ *val = SI1133_MEASUREMENT_FREQUENCY;
+ *val2 = data->meas_rate;
+ return IIO_VAL_FRACTIONAL;
+}
+
+/* Set the samp freq in driver private data */
+static int si1133_store_samp_freq(struct si1133_data *data, int val)
+{
+ unsigned int meas_rate;
+
+ if (val <= 0 || val > SI1133_MEASUREMENT_FREQUENCY)
+ return -ERANGE;
+ meas_rate = SI1133_MEASUREMENT_FREQUENCY / val;
+
+ data->meas_rate = meas_rate;
+
+ return 0;
+}
+
+static int si1133_get_int_time_index(int milliseconds, int nanoseconds)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(si1133_int_time_table); i++) {
+ if (milliseconds == si1133_int_time_table[i][0] &&
+ nanoseconds == si1133_int_time_table[i][1])
+ return i;
+ }
+ return -EINVAL;
+}
+
+static int si1133_set_integration_time(struct si1133_data *data,
+ int milliseconds, int nanoseconds)
+{
+ int index;
+
+ index = si1133_get_int_time_index(milliseconds, nanoseconds);
+ if (index < 0)
+ return index;
+
+ data->adc_sens &= 0xF0;
+ data->adc_sens |= index;
+
+ return si1133_param_set(data, SI1133_PARAM_REG_ADCSENS(0),
+ data->adc_sens);
+}
+
+static int si1133_set_chlist(struct iio_dev *indio_dev, unsigned long scan_mask)
+{
+ struct si1133_data *data = iio_priv(indio_dev);
+
+ /* channel list already set, no need to reprogram */
+ if (data->scan_mask == scan_mask)
+ return 0;
+
+ data->scan_mask = scan_mask;
+
+ return si1133_param_set(data, SI1133_PARAM_REG_CHAN_LIST, scan_mask);
+}
+
+static int si1133_set_adcmux(struct si1133_data *data, unsigned int mux)
+{
+ if ((mux & data->adc_config) == mux)
+ return 0; /* mux already set to correct value */
+
+ data->adc_config &= ~SI1133_ADCMUX_MASK;
+ data->adc_config |= mux;
+
+ return si1133_param_set(data, SI1133_PARAM_REG_ADCCONFIG(0),
+ data->adc_config);
+}
+
+static int si1133_measure(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val)
+{
+ struct si1133_data *data = iio_priv(indio_dev);
+ int err;
+ int retries;
+
+ __be16 resp;
+
+ err = si1133_set_chlist(indio_dev, BIT(0));
+ if (err)
+ return err;
+
+ err = si1133_set_adcmux(data, chan->channel);
+ if (err)
+ return err;
+
+ retries = SI1133_MAX_RETRIES;
+
+ err = si1133_command(data, SI1133_CMD_FORCE);
+ if (err)
+ return err;
+
+ reinit_completion(&data->completion);
+
+ if (!wait_for_completion_timeout(&data->completion,
+ msecs_to_jiffies(SI1133_CMD_TIMEOUT_MS))) {
+ return -ETIMEDOUT;
+ }
+
+ err = regmap_bulk_read(data->regmap, SI1133_REG_HOSTOUT(0), &resp,
+ sizeof(__be16));
+ if (err)
+ return err;
+
+ *val = be16_to_cpu(resp);
+
+ return err;
+}
+
+static irqreturn_t si1133_threaded_irq_handler(int irq, void *private)
+{
+ unsigned int irq_status;
+
+ struct iio_dev *indio_dev = private;
+ struct si1133_data *data = iio_priv(indio_dev);
+ int err = regmap_read(data->regmap, SI1133_REG_IRQ_STATUS, &irq_status);
+
+ if (err) {
+ dev_err_ratelimited(&indio_dev->dev, "Error reading IRQ\n");
+ return IRQ_HANDLED;
+ }
+
+ if (irq_status & data->scan_mask) {
+ complete(&data->completion);
+ return IRQ_HANDLED;
+ }
+
+ return IRQ_NONE;
+}
+
+static unsigned long si1133_swgain_to_scale(unsigned int regval)
+{
+ return BIT(regval);
+}
+
+static int si1133_scale_to_swgain(int scale_integer, int scale_fractional)
+{
+ scale_integer = find_closest(scale_integer, si1133_scale_available,
+ ARRAY_SIZE(si1133_scale_available));
+ if (scale_integer < 0 ||
+ scale_integer > ARRAY_SIZE(si1133_scale_available) ||
+ scale_fractional != 0)
+ return -EINVAL;
+
+ return scale_integer;
+}
+
+static int si1133_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct si1133_data *data = iio_priv(indio_dev);
+ unsigned int adc_sens = data->adc_sens;
+ int err;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ switch (chan->type) {
+ case IIO_UVINDEX:
+ case IIO_LIGHT:
+ err = iio_device_claim_direct_mode(indio_dev);
+ if (err)
+ return err;
+ err = si1133_measure(indio_dev, chan, val);
+ iio_device_release_direct_mode(indio_dev);
+
+ if (err)
+ return err;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_INT_TIME:
+ switch (chan->type) {
+ case IIO_UVINDEX:
+ case IIO_LIGHT:
+ adc_sens &= SI1133_ADCSENS_HW_GAIN_MASK;
+
+ *val = si1133_int_time_table[adc_sens][0];
+ *val2 = si1133_int_time_table[adc_sens][1];
+ return IIO_VAL_INT_PLUS_MICRO;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ case IIO_UVINDEX:
+ adc_sens &= SI1133_ADCSENS_SCALE_MASK;
+ adc_sens >>= SI1133_ADCSENS_SCALE_SHIFT;
+
+ *val = si1133_swgain_to_scale(adc_sens);
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ case IIO_UVINDEX:
+ adc_sens >>= SI1133_ADCSENS_HSIG_SHIFT;
+
+ *val = adc_sens;
+
+ return IIO_VAL_INT;
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return si1133_read_samp_freq(data, val, val2);
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int si1133_set_adcsens(struct iio_dev *indio_dev,
+ unsigned int mask, unsigned int shift,
+ unsigned int value)
+{
+ struct si1133_data *data = iio_priv(indio_dev);
+ unsigned int adc_sens;
+ int err = si1133_param_query(data, SI1133_PARAM_REG_ADCSENS(0),
+ &adc_sens);
+
+ if (err)
+ return err;
+
+ adc_sens &= ~mask;
+ adc_sens |= (value << shift);
+
+ err = si1133_param_set(data, SI1133_PARAM_REG_ADCSENS(0), adc_sens);
+ if (err) {
+ iio_device_release_direct_mode(indio_dev);
+ return err;
+ }
+
+ data->adc_sens = adc_sens;
+
+ return 0;
+}
+
+static int si1133_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct si1133_data *data = iio_priv(indio_dev);
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SCALE:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ case IIO_UVINDEX:
+ val = si1133_scale_to_swgain(val, val2);
+ if (val < 0)
+ return val;
+
+ return si1133_set_adcsens(indio_dev,
+ SI1133_ADCSENS_SCALE_MASK,
+ SI1133_ADCSENS_SCALE_SHIFT,
+ val);
+ default:
+ return -EINVAL;
+ }
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ return si1133_store_samp_freq(data, val);
+ case IIO_CHAN_INFO_INT_TIME:
+ return si1133_set_integration_time(data, val, val2);
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ case IIO_UVINDEX:
+ if (val != 0 || val != 1)
+ return -EINVAL;
+
+ return si1133_set_adcsens(indio_dev,
+ SI1133_ADCSENS_HSIG_MASK,
+ SI1133_ADCSENS_HSIG_SHIFT,
+ val);
+ default:
+ return -EINVAL;
+ }
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static struct attribute *si1133_attributes[] = {
+ &iio_const_attr_integration_time_available.dev_attr.attr,
+ &iio_const_attr_scale_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group si1133_attribute_group = {
+ .attrs = si1133_attributes,
+};
+
+static const struct iio_info si1133_info = {
+ .read_raw = si1133_read_raw,
+ .write_raw = si1133_write_raw,
+ .driver_module = THIS_MODULE,
+ .attrs = &si1133_attribute_group,
+};
+
+static const struct si1133_part_info si1133_part_info[] = {
+ [0] = {
+ 0x33, &si1133_info, si1133_channels, ARRAY_SIZE(si1133_channels)
+ },
+};
+
+static int si1133_initialize(struct si1133_data *data)
+{
+ int err;
+
+ data->scan_mask = 0x01;
+
+ err = si1133_cmd_reset_sw(data);
+ if (err)
+ return err;
+
+ /* Turn off autonomous mode */
+ err = si1133_param_set(data, SI1133_REG_MEAS_RATE, 0);
+ if (err)
+ return err;
+
+ /* Initialize sampling freq to 1 Hz */
+ err = si1133_store_samp_freq(data, 1);
+ if (err)
+ return err;
+
+ /* Activate first channel */
+ err = si1133_param_set(data, SI1133_PARAM_REG_CHAN_LIST,
+ data->scan_mask);
+ if (err < 0)
+ return err;
+
+ err = regmap_write(data->regmap, SI1133_REG_IRQ_ENABLE, 1);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int si1133_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct si1133_data *data;
+ struct iio_dev *indio_dev;
+ unsigned int part_id, rev_id, mfr_id;
+ int err;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+
+ init_completion(&data->completion);
+
+ data->regmap = devm_regmap_init_i2c(client, &si1133_regmap_config);
+ if (IS_ERR(data->regmap)) {
+ err = PTR_ERR(data->regmap);
+ dev_err(&client->dev, "Failed to initialise regmap: %d\n", err);
+ return err;
+ }
+
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+ data->part_info = &si1133_part_info[id->driver_data];
+
+ err = regmap_read(data->regmap, SI1133_REG_PART_ID, &part_id);
+ if (err)
+ return err;
+
+ err = regmap_read(data->regmap, SI1133_REG_REV_ID, &rev_id);
+ if (err)
+ return err;
+
+ err = regmap_read(data->regmap, SI1133_REG_MFR_ID, &mfr_id);
+ if (err)
+ return err;
+
+ dev_info(&client->dev, "device ID part %#02hhx rev %#02hhx mfr %#02hhx\n",
+ part_id, rev_id, mfr_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->mutex);
+
+ err = si1133_initialize(data);
+ if (err) {
+ dev_err(&client->dev, "Error when initializing chip : %d", err);
+ return err;
+ }
+
+ if (client->irq) {
+ err = devm_request_threaded_irq(&client->dev, client->irq,
+ NULL,
+ si1133_threaded_irq_handler,
+ IRQF_ONESHOT | IRQF_SHARED,
+ client->name, indio_dev);
+
+ if (err) {
+ dev_warn(&client->dev, "Unable to request irq: %d for use\n",
+ client->irq);
+ return err;
+ }
+ } else {
+ dev_err(&client->dev, "Required interrupt not provided, cannot proceed");
+ return -EINVAL;
+ }
+
+ err = devm_iio_device_register(&client->dev, indio_dev);
+ if (err) {
+ dev_err(&client->dev, "iio registration fails with error %d\n",
+ err);
+ return err;
+ }
+
+ return 0;
+}
+
+static const struct i2c_device_id si1133_ids[] = {
+ { "si1133", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, si1133_ids);
+
+static struct i2c_driver si1133_driver = {
+ .driver = {
+ .name = "si1133",
+ },
+ .probe = si1133_probe,
+ .id_table = si1133_ids,
+};
+
+module_i2c_driver(si1133_driver);
+
+MODULE_AUTHOR("Maxime Roussin-Belanger <maxime.roussinbelanger@xxxxxxxxx>");
+MODULE_DESCRIPTION("Silabs SI1133, UV index sensor and ambient light sensor driver");
+MODULE_LICENSE("GPL");
--
2.17.1
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