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-rw-r--r--drivers/iio/light/Kconfig7
-rw-r--r--drivers/iio/light/Makefile1
-rw-r--r--drivers/iio/light/tsl2583.c913
3 files changed, 921 insertions, 0 deletions
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index d01172089828..298ea5081a96 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -338,6 +338,13 @@ config SENSORS_TSL2563
This driver can also be built as a module. If so, the module
will be called tsl2563.
+config TSL2583
+ tristate "TAOS TSL2580, TSL2581 and TSL2583 light-to-digital converters"
+ depends on I2C
+ help
+ Provides support for the TAOS tsl2580, tsl2581 and tsl2583 devices.
+ Access ALS data via iio, sysfs.
+
config TSL4531
tristate "TAOS TSL4531 ambient light sensors"
depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index 15f24c557f5f..4de520036e6e 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -31,6 +31,7 @@ obj-$(CONFIG_SI1145) += si1145.o
obj-$(CONFIG_STK3310) += stk3310.o
obj-$(CONFIG_TCS3414) += tcs3414.o
obj-$(CONFIG_TCS3472) += tcs3472.o
+obj-$(CONFIG_TSL2583) += tsl2583.o
obj-$(CONFIG_TSL4531) += tsl4531.o
obj-$(CONFIG_US5182D) += us5182d.o
obj-$(CONFIG_VCNL4000) += vcnl4000.o
diff --git a/drivers/iio/light/tsl2583.c b/drivers/iio/light/tsl2583.c
new file mode 100644
index 000000000000..0b87f6adbb79
--- /dev/null
+++ b/drivers/iio/light/tsl2583.c
@@ -0,0 +1,913 @@
+/*
+ * Device driver for monitoring ambient light intensity (lux)
+ * within the TAOS tsl258x family of devices (tsl2580, tsl2581, tsl2583).
+ *
+ * Copyright (c) 2011, TAOS Corporation.
+ * Copyright (c) 2016 Brian Masney <masneyb@onstation.org>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/i2c.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/mutex.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+
+/* Device Registers and Masks */
+#define TSL2583_CNTRL 0x00
+#define TSL2583_ALS_TIME 0X01
+#define TSL2583_INTERRUPT 0x02
+#define TSL2583_GAIN 0x07
+#define TSL2583_REVID 0x11
+#define TSL2583_CHIPID 0x12
+#define TSL2583_ALS_CHAN0LO 0x14
+#define TSL2583_ALS_CHAN0HI 0x15
+#define TSL2583_ALS_CHAN1LO 0x16
+#define TSL2583_ALS_CHAN1HI 0x17
+#define TSL2583_TMR_LO 0x18
+#define TSL2583_TMR_HI 0x19
+
+/* tsl2583 cmd reg masks */
+#define TSL2583_CMD_REG 0x80
+#define TSL2583_CMD_SPL_FN 0x60
+#define TSL2583_CMD_ALS_INT_CLR 0x01
+
+/* tsl2583 cntrl reg masks */
+#define TSL2583_CNTL_ADC_ENBL 0x02
+#define TSL2583_CNTL_PWR_OFF 0x00
+#define TSL2583_CNTL_PWR_ON 0x01
+
+/* tsl2583 status reg masks */
+#define TSL2583_STA_ADC_VALID 0x01
+#define TSL2583_STA_ADC_INTR 0x10
+
+/* Lux calculation constants */
+#define TSL2583_LUX_CALC_OVER_FLOW 65535
+
+#define TSL2583_INTERRUPT_DISABLED 0x00
+
+#define TSL2583_CHIP_ID 0x90
+#define TSL2583_CHIP_ID_MASK 0xf0
+
+/* Per-device data */
+struct tsl2583_als_info {
+ u16 als_ch0;
+ u16 als_ch1;
+ u16 lux;
+};
+
+struct tsl2583_lux {
+ unsigned int ratio;
+ unsigned int ch0;
+ unsigned int ch1;
+};
+
+static const struct tsl2583_lux tsl2583_default_lux[] = {
+ { 9830, 8520, 15729 },
+ { 12452, 10807, 23344 },
+ { 14746, 6383, 11705 },
+ { 17695, 4063, 6554 },
+ { 0, 0, 0 } /* Termination segment */
+};
+
+#define TSL2583_MAX_LUX_TABLE_ENTRIES 11
+
+struct tsl2583_settings {
+ int als_time;
+ int als_gain;
+ int als_gain_trim;
+ int als_cal_target;
+
+ /*
+ * This structure is intentionally large to accommodate updates via
+ * sysfs. Sized to 11 = max 10 segments + 1 termination segment.
+ * Assumption is that one and only one type of glass used.
+ */
+ struct tsl2583_lux als_device_lux[TSL2583_MAX_LUX_TABLE_ENTRIES];
+};
+
+struct tsl2583_chip {
+ struct mutex als_mutex;
+ struct i2c_client *client;
+ struct tsl2583_als_info als_cur_info;
+ struct tsl2583_settings als_settings;
+ int als_time_scale;
+ int als_saturation;
+ bool suspended;
+};
+
+struct gainadj {
+ s16 ch0;
+ s16 ch1;
+ s16 mean;
+};
+
+/* Index = (0 - 3) Used to validate the gain selection index */
+static const struct gainadj gainadj[] = {
+ { 1, 1, 1 },
+ { 8, 8, 8 },
+ { 16, 16, 16 },
+ { 107, 115, 111 }
+};
+
+/*
+ * Provides initial operational parameter defaults.
+ * These defaults may be changed through the device's sysfs files.
+ */
+static void tsl2583_defaults(struct tsl2583_chip *chip)
+{
+ /*
+ * The integration time must be a multiple of 50ms and within the
+ * range [50, 600] ms.
+ */
+ chip->als_settings.als_time = 100;
+
+ /*
+ * This is an index into the gainadj table. Assume clear glass as the
+ * default.
+ */
+ chip->als_settings.als_gain = 0;
+
+ /* Default gain trim to account for aperture effects */
+ chip->als_settings.als_gain_trim = 1000;
+
+ /* Known external ALS reading used for calibration */
+ chip->als_settings.als_cal_target = 130;
+
+ /* Default lux table. */
+ memcpy(chip->als_settings.als_device_lux, tsl2583_default_lux,
+ sizeof(tsl2583_default_lux));
+}
+
+/*
+ * Reads and calculates current lux value.
+ * The raw ch0 and ch1 values of the ambient light sensed in the last
+ * integration cycle are read from the device.
+ * Time scale factor array values are adjusted based on the integration time.
+ * The raw values are multiplied by a scale factor, and device gain is obtained
+ * using gain index. Limit checks are done next, then the ratio of a multiple
+ * of ch1 value, to the ch0 value, is calculated. The array als_device_lux[]
+ * declared above is then scanned to find the first ratio value that is just
+ * above the ratio we just calculated. The ch0 and ch1 multiplier constants in
+ * the array are then used along with the time scale factor array values, to
+ * calculate the lux.
+ */
+static int tsl2583_get_lux(struct iio_dev *indio_dev)
+{
+ u16 ch0, ch1; /* separated ch0/ch1 data from device */
+ u32 lux; /* raw lux calculated from device data */
+ u64 lux64;
+ u32 ratio;
+ u8 buf[5];
+ struct tsl2583_lux *p;
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int i, ret;
+
+ ret = i2c_smbus_read_byte_data(chip->client, TSL2583_CMD_REG);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "%s: failed to read CMD_REG register\n",
+ __func__);
+ goto done;
+ }
+
+ /* is data new & valid */
+ if (!(ret & TSL2583_STA_ADC_INTR)) {
+ dev_err(&chip->client->dev, "%s: data not valid; returning last value\n",
+ __func__);
+ ret = chip->als_cur_info.lux; /* return LAST VALUE */
+ goto done;
+ }
+
+ for (i = 0; i < 4; i++) {
+ int reg = TSL2583_CMD_REG | (TSL2583_ALS_CHAN0LO + i);
+
+ ret = i2c_smbus_read_byte_data(chip->client, reg);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "%s: failed to read register %x\n",
+ __func__, reg);
+ goto done;
+ }
+ buf[i] = ret;
+ }
+
+ /*
+ * Clear the pending interrupt status bit on the chip to allow the next
+ * integration cycle to start. This has to be done even though this
+ * driver currently does not support interrupts.
+ */
+ ret = i2c_smbus_write_byte(chip->client,
+ (TSL2583_CMD_REG | TSL2583_CMD_SPL_FN |
+ TSL2583_CMD_ALS_INT_CLR));
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "%s: failed to clear the interrupt bit\n",
+ __func__);
+ goto done; /* have no data, so return failure */
+ }
+
+ /* extract ALS/lux data */
+ ch0 = le16_to_cpup((const __le16 *)&buf[0]);
+ ch1 = le16_to_cpup((const __le16 *)&buf[2]);
+
+ chip->als_cur_info.als_ch0 = ch0;
+ chip->als_cur_info.als_ch1 = ch1;
+
+ if ((ch0 >= chip->als_saturation) || (ch1 >= chip->als_saturation))
+ goto return_max;
+
+ if (!ch0) {
+ /*
+ * The sensor appears to be in total darkness so set the
+ * calculated lux to 0 and return early to avoid a division by
+ * zero below when calculating the ratio.
+ */
+ ret = 0;
+ chip->als_cur_info.lux = 0;
+ goto done;
+ }
+
+ /* calculate ratio */
+ ratio = (ch1 << 15) / ch0;
+
+ /* convert to unscaled lux using the pointer to the table */
+ for (p = (struct tsl2583_lux *)chip->als_settings.als_device_lux;
+ p->ratio != 0 && p->ratio < ratio; p++)
+ ;
+
+ if (p->ratio == 0) {
+ lux = 0;
+ } else {
+ u32 ch0lux, ch1lux;
+
+ ch0lux = ((ch0 * p->ch0) +
+ (gainadj[chip->als_settings.als_gain].ch0 >> 1))
+ / gainadj[chip->als_settings.als_gain].ch0;
+ ch1lux = ((ch1 * p->ch1) +
+ (gainadj[chip->als_settings.als_gain].ch1 >> 1))
+ / gainadj[chip->als_settings.als_gain].ch1;
+
+ /* note: lux is 31 bit max at this point */
+ if (ch1lux > ch0lux) {
+ dev_dbg(&chip->client->dev, "%s: No Data - Returning 0\n",
+ __func__);
+ ret = 0;
+ chip->als_cur_info.lux = 0;
+ goto done;
+ }
+
+ lux = ch0lux - ch1lux;
+ }
+
+ /* adjust for active time scale */
+ if (chip->als_time_scale == 0)
+ lux = 0;
+ else
+ lux = (lux + (chip->als_time_scale >> 1)) /
+ chip->als_time_scale;
+
+ /*
+ * Adjust for active gain scale.
+ * The tsl2583_default_lux tables above have a factor of 8192 built in,
+ * so we need to shift right.
+ * User-specified gain provides a multiplier.
+ * Apply user-specified gain before shifting right to retain precision.
+ * Use 64 bits to avoid overflow on multiplication.
+ * Then go back to 32 bits before division to avoid using div_u64().
+ */
+ lux64 = lux;
+ lux64 = lux64 * chip->als_settings.als_gain_trim;
+ lux64 >>= 13;
+ lux = lux64;
+ lux = (lux + 500) / 1000;
+
+ if (lux > TSL2583_LUX_CALC_OVER_FLOW) { /* check for overflow */
+return_max:
+ lux = TSL2583_LUX_CALC_OVER_FLOW;
+ }
+
+ /* Update the structure with the latest VALID lux. */
+ chip->als_cur_info.lux = lux;
+ ret = lux;
+
+done:
+ return ret;
+}
+
+/*
+ * Obtain single reading and calculate the als_gain_trim (later used
+ * to derive actual lux).
+ * Return updated gain_trim value.
+ */
+static int tsl2583_als_calibrate(struct iio_dev *indio_dev)
+{
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ unsigned int gain_trim_val;
+ int ret;
+ int lux_val;
+
+ ret = i2c_smbus_read_byte_data(chip->client,
+ TSL2583_CMD_REG | TSL2583_CNTRL);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to read from the CNTRL register\n",
+ __func__);
+ return ret;
+ }
+
+ if ((ret & (TSL2583_CNTL_ADC_ENBL | TSL2583_CNTL_PWR_ON))
+ != (TSL2583_CNTL_ADC_ENBL | TSL2583_CNTL_PWR_ON)) {
+ dev_err(&chip->client->dev,
+ "%s: Device is not powered on and/or ADC is not enabled\n",
+ __func__);
+ return -EINVAL;
+ } else if ((ret & TSL2583_STA_ADC_VALID) != TSL2583_STA_ADC_VALID) {
+ dev_err(&chip->client->dev,
+ "%s: The two ADC channels have not completed an integration cycle\n",
+ __func__);
+ return -ENODATA;
+ }
+
+ lux_val = tsl2583_get_lux(indio_dev);
+ if (lux_val < 0) {
+ dev_err(&chip->client->dev, "%s: failed to get lux\n",
+ __func__);
+ return lux_val;
+ }
+
+ gain_trim_val = (unsigned int)(((chip->als_settings.als_cal_target)
+ * chip->als_settings.als_gain_trim) / lux_val);
+ if ((gain_trim_val < 250) || (gain_trim_val > 4000)) {
+ dev_err(&chip->client->dev,
+ "%s: trim_val of %d is not within the range [250, 4000]\n",
+ __func__, gain_trim_val);
+ return -ENODATA;
+ }
+
+ chip->als_settings.als_gain_trim = (int)gain_trim_val;
+
+ return 0;
+}
+
+static int tsl2583_set_als_time(struct tsl2583_chip *chip)
+{
+ int als_count, als_time, ret;
+ u8 val;
+
+ /* determine als integration register */
+ als_count = (chip->als_settings.als_time * 100 + 135) / 270;
+ if (!als_count)
+ als_count = 1; /* ensure at least one cycle */
+
+ /* convert back to time (encompasses overrides) */
+ als_time = (als_count * 27 + 5) / 10;
+
+ val = 256 - als_count;
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2583_CMD_REG | TSL2583_ALS_TIME,
+ val);
+ if (ret < 0) {
+ dev_err(&chip->client->dev, "%s: failed to set the als time to %d\n",
+ __func__, val);
+ return ret;
+ }
+
+ /* set chip struct re scaling and saturation */
+ chip->als_saturation = als_count * 922; /* 90% of full scale */
+ chip->als_time_scale = (als_time + 25) / 50;
+
+ return ret;
+}
+
+static int tsl2583_set_als_gain(struct tsl2583_chip *chip)
+{
+ int ret;
+
+ /* Set the gain based on als_settings struct */
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2583_CMD_REG | TSL2583_GAIN,
+ chip->als_settings.als_gain);
+ if (ret < 0)
+ dev_err(&chip->client->dev,
+ "%s: failed to set the gain to %d\n", __func__,
+ chip->als_settings.als_gain);
+
+ return ret;
+}
+
+static int tsl2583_set_power_state(struct tsl2583_chip *chip, u8 state)
+{
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2583_CMD_REG | TSL2583_CNTRL, state);
+ if (ret < 0)
+ dev_err(&chip->client->dev,
+ "%s: failed to set the power state to %d\n", __func__,
+ state);
+
+ return ret;
+}
+
+/*
+ * Turn the device on.
+ * Configuration must be set before calling this function.
+ */
+static int tsl2583_chip_init_and_power_on(struct iio_dev *indio_dev)
+{
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ /* Power on the device; ADC off. */
+ ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_ON);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(chip->client,
+ TSL2583_CMD_REG | TSL2583_INTERRUPT,
+ TSL2583_INTERRUPT_DISABLED);
+ if (ret < 0) {
+ dev_err(&chip->client->dev,
+ "%s: failed to disable interrupts\n", __func__);
+ return ret;
+ }
+
+ ret = tsl2583_set_als_time(chip);
+ if (ret < 0)
+ return ret;
+
+ ret = tsl2583_set_als_gain(chip);
+ if (ret < 0)
+ return ret;
+
+ usleep_range(3000, 3500);
+
+ ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_ON |
+ TSL2583_CNTL_ADC_ENBL);
+ if (ret < 0)
+ return ret;
+
+ chip->suspended = false;
+
+ return ret;
+}
+
+/* Sysfs Interface Functions */
+
+static ssize_t in_illuminance_input_target_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&chip->als_mutex);
+ ret = sprintf(buf, "%d\n", chip->als_settings.als_cal_target);
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static ssize_t in_illuminance_input_target_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int value;
+
+ if (kstrtoint(buf, 0, &value) || !value)
+ return -EINVAL;
+
+ mutex_lock(&chip->als_mutex);
+ chip->als_settings.als_cal_target = value;
+ mutex_unlock(&chip->als_mutex);
+
+ return len;
+}
+
+static ssize_t in_illuminance_calibrate_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int value, ret;
+
+ if (kstrtoint(buf, 0, &value) || value != 1)
+ return -EINVAL;
+
+ mutex_lock(&chip->als_mutex);
+
+ if (chip->suspended) {
+ ret = -EBUSY;
+ goto done;
+ }
+
+ ret = tsl2583_als_calibrate(indio_dev);
+ if (ret < 0)
+ goto done;
+
+ ret = len;
+done:
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static ssize_t in_illuminance_lux_table_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ unsigned int i;
+ int offset = 0;
+
+ for (i = 0; i < ARRAY_SIZE(chip->als_settings.als_device_lux); i++) {
+ offset += sprintf(buf + offset, "%u,%u,%u,",
+ chip->als_settings.als_device_lux[i].ratio,
+ chip->als_settings.als_device_lux[i].ch0,
+ chip->als_settings.als_device_lux[i].ch1);
+ if (chip->als_settings.als_device_lux[i].ratio == 0) {
+ /*
+ * We just printed the first "0" entry.
+ * Now get rid of the extra "," and break.
+ */
+ offset--;
+ break;
+ }
+ }
+
+ offset += sprintf(buf + offset, "\n");
+
+ return offset;
+}
+
+static ssize_t in_illuminance_lux_table_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ const unsigned int max_ints = TSL2583_MAX_LUX_TABLE_ENTRIES * 3;
+ int value[TSL2583_MAX_LUX_TABLE_ENTRIES * 3];
+ int ret = -EINVAL;
+ unsigned int n;
+
+ mutex_lock(&chip->als_mutex);
+
+ get_options(buf, ARRAY_SIZE(value), value);
+
+ /*
+ * We now have an array of ints starting at value[1], and
+ * enumerated by value[0].
+ * We expect each group of three ints is one table entry,
+ * and the last table entry is all 0.
+ */
+ n = value[0];
+ if ((n % 3) || n < 6 || n > max_ints) {
+ dev_err(dev,
+ "%s: The number of entries in the lux table must be a multiple of 3 and within the range [6, %d]\n",
+ __func__, max_ints);
+ goto done;
+ }
+ if ((value[n - 2] | value[n - 1] | value[n]) != 0) {
+ dev_err(dev, "%s: The last 3 entries in the lux table must be zeros.\n",
+ __func__);
+ goto done;
+ }
+
+ memcpy(chip->als_settings.als_device_lux, &value[1],
+ value[0] * sizeof(value[1]));
+
+ ret = len;
+
+done:
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static IIO_CONST_ATTR(in_illuminance_calibscale_available, "1 8 16 111");
+static IIO_CONST_ATTR(in_illuminance_integration_time_available,
+ "0.000050 0.000100 0.000150 0.000200 0.000250 0.000300 0.000350 0.000400 0.000450 0.000500 0.000550 0.000600 0.000650");
+static IIO_DEVICE_ATTR_RW(in_illuminance_input_target, 0);
+static IIO_DEVICE_ATTR_WO(in_illuminance_calibrate, 0);
+static IIO_DEVICE_ATTR_RW(in_illuminance_lux_table, 0);
+
+static struct attribute *sysfs_attrs_ctrl[] = {
+ &iio_const_attr_in_illuminance_calibscale_available.dev_attr.attr,
+ &iio_const_attr_in_illuminance_integration_time_available.dev_attr.attr,
+ &iio_dev_attr_in_illuminance_input_target.dev_attr.attr,
+ &iio_dev_attr_in_illuminance_calibrate.dev_attr.attr,
+ &iio_dev_attr_in_illuminance_lux_table.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group tsl2583_attribute_group = {
+ .attrs = sysfs_attrs_ctrl,
+};
+
+static const struct iio_chan_spec tsl2583_channels[] = {
+ {
+ .type = IIO_LIGHT,
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_IR,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ },
+ {
+ .type = IIO_LIGHT,
+ .modified = 1,
+ .channel2 = IIO_MOD_LIGHT_BOTH,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ },
+ {
+ .type = IIO_LIGHT,
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+ BIT(IIO_CHAN_INFO_CALIBBIAS) |
+ BIT(IIO_CHAN_INFO_CALIBSCALE) |
+ BIT(IIO_CHAN_INFO_INT_TIME),
+ },
+};
+
+static int tsl2583_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret = -EINVAL;
+
+ mutex_lock(&chip->als_mutex);
+
+ if (chip->suspended) {
+ ret = -EBUSY;
+ goto read_done;
+ }
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (chan->type == IIO_LIGHT) {
+ ret = tsl2583_get_lux(indio_dev);
+ if (ret < 0)
+ goto read_done;
+
+ /*
+ * From page 20 of the TSL2581, TSL2583 data
+ * sheet (TAOS134 − MARCH 2011):
+ *
+ * One of the photodiodes (channel 0) is
+ * sensitive to both visible and infrared light,
+ * while the second photodiode (channel 1) is
+ * sensitive primarily to infrared light.
+ */
+ if (chan->channel2 == IIO_MOD_LIGHT_BOTH)
+ *val = chip->als_cur_info.als_ch0;
+ else
+ *val = chip->als_cur_info.als_ch1;
+
+ ret = IIO_VAL_INT;
+ }
+ break;
+ case IIO_CHAN_INFO_PROCESSED:
+ if (chan->type == IIO_LIGHT) {
+ ret = tsl2583_get_lux(indio_dev);
+ if (ret < 0)
+ goto read_done;
+
+ *val = ret;
+ ret = IIO_VAL_INT;
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (chan->type == IIO_LIGHT) {
+ *val = chip->als_settings.als_gain_trim;
+ ret = IIO_VAL_INT;
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_LIGHT) {
+ *val = gainadj[chip->als_settings.als_gain].mean;
+ ret = IIO_VAL_INT;
+ }
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type == IIO_LIGHT) {
+ *val = 0;
+ *val2 = chip->als_settings.als_time;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ }
+ break;
+ default:
+ break;
+ }
+
+read_done:
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static int tsl2583_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val, int val2, long mask)
+{
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret = -EINVAL;
+
+ mutex_lock(&chip->als_mutex);
+
+ if (chip->suspended) {
+ ret = -EBUSY;
+ goto write_done;
+ }
+
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBBIAS:
+ if (chan->type == IIO_LIGHT) {
+ chip->als_settings.als_gain_trim = val;
+ ret = 0;
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_LIGHT) {
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(gainadj); i++) {
+ if (gainadj[i].mean == val) {
+ chip->als_settings.als_gain = i;
+ ret = tsl2583_set_als_gain(chip);
+ break;
+ }
+ }
+ }
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type == IIO_LIGHT && !val && val2 >= 50 &&
+ val2 <= 650 && !(val2 % 50)) {
+ chip->als_settings.als_time = val2;
+ ret = tsl2583_set_als_time(chip);
+ }
+ break;
+ default:
+ break;
+ }
+
+write_done:
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static const struct iio_info tsl2583_info = {
+ .attrs = &tsl2583_attribute_group,
+ .driver_module = THIS_MODULE,
+ .read_raw = tsl2583_read_raw,
+ .write_raw = tsl2583_write_raw,
+};
+
+static int tsl2583_probe(struct i2c_client *clientp,
+ const struct i2c_device_id *idp)
+{
+ int ret;
+ struct tsl2583_chip *chip;
+ struct iio_dev *indio_dev;
+
+ if (!i2c_check_functionality(clientp->adapter,
+ I2C_FUNC_SMBUS_BYTE_DATA)) {
+ dev_err(&clientp->dev, "%s: i2c smbus byte data functionality is unsupported\n",
+ __func__);
+ return -EOPNOTSUPP;
+ }
+
+ indio_dev = devm_iio_device_alloc(&clientp->dev, sizeof(*chip));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ chip = iio_priv(indio_dev);
+ chip->client = clientp;
+ i2c_set_clientdata(clientp, indio_dev);
+
+ mutex_init(&chip->als_mutex);
+ chip->suspended = true;
+
+ ret = i2c_smbus_read_byte_data(clientp,
+ TSL2583_CMD_REG | TSL2583_CHIPID);
+ if (ret < 0) {
+ dev_err(&clientp->dev,
+ "%s: failed to read the chip ID register\n", __func__);
+ return ret;
+ }
+
+ if ((ret & TSL2583_CHIP_ID_MASK) != TSL2583_CHIP_ID) {
+ dev_err(&clientp->dev, "%s: received an unknown chip ID %x\n",
+ __func__, ret);
+ return -EINVAL;
+ }
+
+ indio_dev->info = &tsl2583_info;
+ indio_dev->channels = tsl2583_channels;
+ indio_dev->num_channels = ARRAY_SIZE(tsl2583_channels);
+ indio_dev->dev.parent = &clientp->dev;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->name = chip->client->name;
+
+ ret = devm_iio_device_register(indio_dev->dev.parent, indio_dev);
+ if (ret) {
+ dev_err(&clientp->dev, "%s: iio registration failed\n",
+ __func__);
+ return ret;
+ }
+
+ /* Load up the V2 defaults (these are hard coded defaults for now) */
+ tsl2583_defaults(chip);
+
+ /* Make sure the chip is on */
+ ret = tsl2583_chip_init_and_power_on(indio_dev);
+ if (ret < 0)
+ return ret;
+
+ dev_info(&clientp->dev, "Light sensor found.\n");
+
+ return 0;
+}
+
+static int __maybe_unused tsl2583_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&chip->als_mutex);
+
+ ret = tsl2583_set_power_state(chip, TSL2583_CNTL_PWR_OFF);
+ chip->suspended = true;
+
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static int __maybe_unused tsl2583_resume(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct tsl2583_chip *chip = iio_priv(indio_dev);
+ int ret;
+
+ mutex_lock(&chip->als_mutex);
+
+ ret = tsl2583_chip_init_and_power_on(indio_dev);
+
+ mutex_unlock(&chip->als_mutex);
+
+ return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(tsl2583_pm_ops, tsl2583_suspend, tsl2583_resume);
+
+static struct i2c_device_id tsl2583_idtable[] = {
+ { "tsl2580", 0 },
+ { "tsl2581", 1 },
+ { "tsl2583", 2 },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, tsl2583_idtable);
+
+static const struct of_device_id tsl2583_of_match[] = {
+ { .compatible = "amstaos,tsl2580", },
+ { .compatible = "amstaos,tsl2581", },
+ { .compatible = "amstaos,tsl2583", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, tsl2583_of_match);
+
+/* Driver definition */
+static struct i2c_driver tsl2583_driver = {
+ .driver = {
+ .name = "tsl2583",
+ .pm = &tsl2583_pm_ops,
+ .of_match_table = tsl2583_of_match,
+ },
+ .id_table = tsl2583_idtable,
+ .probe = tsl2583_probe,
+};
+module_i2c_driver(tsl2583_driver);
+
+MODULE_AUTHOR("J. August Brenner <jbrenner@taosinc.com>");
+MODULE_AUTHOR("Brian Masney <masneyb@onstation.org>");
+MODULE_DESCRIPTION("TAOS tsl2583 ambient light sensor driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-11-27 07:36:07 +0000