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-rw-r--r--drivers/iio/light/Kconfig12
-rw-r--r--drivers/iio/light/Makefile1
-rw-r--r--drivers/iio/light/isl29018.c847
3 files changed, 860 insertions, 0 deletions
diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
index ba2e64d7ee58..d01172089828 100644
--- a/drivers/iio/light/Kconfig
+++ b/drivers/iio/light/Kconfig
@@ -140,6 +140,18 @@ config GP2AP020A00F
To compile this driver as a module, choose M here: the
module will be called gp2ap020a00f.
+config SENSORS_ISL29018
+ tristate "Intersil 29018 light and proximity sensor"
+ depends on I2C
+ select REGMAP_I2C
+ default n
+ help
+ If you say yes here you get support for ambient light sensing and
+ proximity infrared sensing from Intersil ISL29018.
+ This driver will provide the measurements of ambient light intensity
+ in lux, proximity infrared sensing and normal infrared sensing.
+ Data from sensor is accessible via sysfs.
+
config ISL29125
tristate "Intersil ISL29125 digital color light sensor"
depends on I2C
diff --git a/drivers/iio/light/Makefile b/drivers/iio/light/Makefile
index c5768df87a17..15f24c557f5f 100644
--- a/drivers/iio/light/Makefile
+++ b/drivers/iio/light/Makefile
@@ -17,6 +17,7 @@ obj-$(CONFIG_CM36651) += cm36651.o
obj-$(CONFIG_GP2AP020A00F) += gp2ap020a00f.o
obj-$(CONFIG_HID_SENSOR_ALS) += hid-sensor-als.o
obj-$(CONFIG_HID_SENSOR_PROX) += hid-sensor-prox.o
+obj-$(CONFIG_SENSORS_ISL29018) += isl29018.o
obj-$(CONFIG_ISL29125) += isl29125.o
obj-$(CONFIG_JSA1212) += jsa1212.o
obj-$(CONFIG_SENSORS_LM3533) += lm3533-als.o
diff --git a/drivers/iio/light/isl29018.c b/drivers/iio/light/isl29018.c
new file mode 100644
index 000000000000..917dd8b43e72
--- /dev/null
+++ b/drivers/iio/light/isl29018.c
@@ -0,0 +1,847 @@
+/*
+ * A iio driver for the light sensor ISL 29018/29023/29035.
+ *
+ * IIO driver for monitoring ambient light intensity in luxi, proximity
+ * sensing and infrared sensing.
+ *
+ * Copyright (c) 2010, NVIDIA Corporation.
+ *
+ * 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/module.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/acpi.h>
+
+#define ISL29018_CONV_TIME_MS 100
+
+#define ISL29018_REG_ADD_COMMAND1 0x00
+#define ISL29018_CMD1_OPMODE_SHIFT 5
+#define ISL29018_CMD1_OPMODE_MASK (7 << ISL29018_CMD1_OPMODE_SHIFT)
+#define ISL29018_CMD1_OPMODE_POWER_DOWN 0
+#define ISL29018_CMD1_OPMODE_ALS_ONCE 1
+#define ISL29018_CMD1_OPMODE_IR_ONCE 2
+#define ISL29018_CMD1_OPMODE_PROX_ONCE 3
+
+#define ISL29018_REG_ADD_COMMAND2 0x01
+#define ISL29018_CMD2_RESOLUTION_SHIFT 2
+#define ISL29018_CMD2_RESOLUTION_MASK (0x3 << ISL29018_CMD2_RESOLUTION_SHIFT)
+
+#define ISL29018_CMD2_RANGE_SHIFT 0
+#define ISL29018_CMD2_RANGE_MASK (0x3 << ISL29018_CMD2_RANGE_SHIFT)
+
+#define ISL29018_CMD2_SCHEME_SHIFT 7
+#define ISL29018_CMD2_SCHEME_MASK (0x1 << ISL29018_CMD2_SCHEME_SHIFT)
+
+#define ISL29018_REG_ADD_DATA_LSB 0x02
+#define ISL29018_REG_ADD_DATA_MSB 0x03
+
+#define ISL29018_REG_TEST 0x08
+#define ISL29018_TEST_SHIFT 0
+#define ISL29018_TEST_MASK (0xFF << ISL29018_TEST_SHIFT)
+
+#define ISL29035_REG_DEVICE_ID 0x0F
+#define ISL29035_DEVICE_ID_SHIFT 0x03
+#define ISL29035_DEVICE_ID_MASK (0x7 << ISL29035_DEVICE_ID_SHIFT)
+#define ISL29035_DEVICE_ID 0x5
+#define ISL29035_BOUT_SHIFT 0x07
+#define ISL29035_BOUT_MASK (0x01 << ISL29035_BOUT_SHIFT)
+
+enum isl29018_int_time {
+ ISL29018_INT_TIME_16,
+ ISL29018_INT_TIME_12,
+ ISL29018_INT_TIME_8,
+ ISL29018_INT_TIME_4,
+};
+
+static const unsigned int isl29018_int_utimes[3][4] = {
+ {90000, 5630, 351, 21},
+ {90000, 5600, 352, 22},
+ {105000, 6500, 410, 25},
+};
+
+static const struct isl29018_scale {
+ unsigned int scale;
+ unsigned int uscale;
+} isl29018_scales[4][4] = {
+ { {0, 15258}, {0, 61035}, {0, 244140}, {0, 976562} },
+ { {0, 244140}, {0, 976562}, {3, 906250}, {15, 625000} },
+ { {3, 906250}, {15, 625000}, {62, 500000}, {250, 0} },
+ { {62, 500000}, {250, 0}, {1000, 0}, {4000, 0} }
+};
+
+struct isl29018_chip {
+ struct regmap *regmap;
+ struct mutex lock;
+ int type;
+ unsigned int calibscale;
+ unsigned int ucalibscale;
+ unsigned int int_time;
+ struct isl29018_scale scale;
+ int prox_scheme;
+ bool suspended;
+};
+
+static int isl29018_set_integration_time(struct isl29018_chip *chip,
+ unsigned int utime)
+{
+ unsigned int i;
+ int ret;
+ unsigned int int_time, new_int_time;
+
+ for (i = 0; i < ARRAY_SIZE(isl29018_int_utimes[chip->type]); ++i) {
+ if (utime == isl29018_int_utimes[chip->type][i]) {
+ new_int_time = i;
+ break;
+ }
+ }
+
+ if (i >= ARRAY_SIZE(isl29018_int_utimes[chip->type]))
+ return -EINVAL;
+
+ ret = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMAND2,
+ ISL29018_CMD2_RESOLUTION_MASK,
+ i << ISL29018_CMD2_RESOLUTION_SHIFT);
+ if (ret < 0)
+ return ret;
+
+ /* Keep the same range when integration time changes */
+ int_time = chip->int_time;
+ for (i = 0; i < ARRAY_SIZE(isl29018_scales[int_time]); ++i) {
+ if (chip->scale.scale == isl29018_scales[int_time][i].scale &&
+ chip->scale.uscale == isl29018_scales[int_time][i].uscale) {
+ chip->scale = isl29018_scales[new_int_time][i];
+ break;
+ }
+ }
+ chip->int_time = new_int_time;
+
+ return 0;
+}
+
+static int isl29018_set_scale(struct isl29018_chip *chip, int scale, int uscale)
+{
+ unsigned int i;
+ int ret;
+ struct isl29018_scale new_scale;
+
+ for (i = 0; i < ARRAY_SIZE(isl29018_scales[chip->int_time]); ++i) {
+ if (scale == isl29018_scales[chip->int_time][i].scale &&
+ uscale == isl29018_scales[chip->int_time][i].uscale) {
+ new_scale = isl29018_scales[chip->int_time][i];
+ break;
+ }
+ }
+
+ if (i >= ARRAY_SIZE(isl29018_scales[chip->int_time]))
+ return -EINVAL;
+
+ ret = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMAND2,
+ ISL29018_CMD2_RANGE_MASK,
+ i << ISL29018_CMD2_RANGE_SHIFT);
+ if (ret < 0)
+ return ret;
+
+ chip->scale = new_scale;
+
+ return 0;
+}
+
+static int isl29018_read_sensor_input(struct isl29018_chip *chip, int mode)
+{
+ int status;
+ unsigned int lsb;
+ unsigned int msb;
+ struct device *dev = regmap_get_device(chip->regmap);
+
+ /* Set mode */
+ status = regmap_write(chip->regmap, ISL29018_REG_ADD_COMMAND1,
+ mode << ISL29018_CMD1_OPMODE_SHIFT);
+ if (status) {
+ dev_err(dev,
+ "Error in setting operating mode err %d\n", status);
+ return status;
+ }
+ msleep(ISL29018_CONV_TIME_MS);
+ status = regmap_read(chip->regmap, ISL29018_REG_ADD_DATA_LSB, &lsb);
+ if (status < 0) {
+ dev_err(dev,
+ "Error in reading LSB DATA with err %d\n", status);
+ return status;
+ }
+
+ status = regmap_read(chip->regmap, ISL29018_REG_ADD_DATA_MSB, &msb);
+ if (status < 0) {
+ dev_err(dev,
+ "Error in reading MSB DATA with error %d\n", status);
+ return status;
+ }
+ dev_vdbg(dev, "MSB 0x%x and LSB 0x%x\n", msb, lsb);
+
+ return (msb << 8) | lsb;
+}
+
+static int isl29018_read_lux(struct isl29018_chip *chip, int *lux)
+{
+ int lux_data;
+ unsigned int data_x_range;
+
+ lux_data = isl29018_read_sensor_input(chip,
+ ISL29018_CMD1_OPMODE_ALS_ONCE);
+ if (lux_data < 0)
+ return lux_data;
+
+ data_x_range = lux_data * chip->scale.scale +
+ lux_data * chip->scale.uscale / 1000000;
+ *lux = data_x_range * chip->calibscale +
+ data_x_range * chip->ucalibscale / 1000000;
+
+ return 0;
+}
+
+static int isl29018_read_ir(struct isl29018_chip *chip, int *ir)
+{
+ int ir_data;
+
+ ir_data = isl29018_read_sensor_input(chip,
+ ISL29018_CMD1_OPMODE_IR_ONCE);
+ if (ir_data < 0)
+ return ir_data;
+
+ *ir = ir_data;
+
+ return 0;
+}
+
+static int isl29018_read_proximity_ir(struct isl29018_chip *chip, int scheme,
+ int *near_ir)
+{
+ int status;
+ int prox_data = -1;
+ int ir_data = -1;
+ struct device *dev = regmap_get_device(chip->regmap);
+
+ /* Do proximity sensing with required scheme */
+ status = regmap_update_bits(chip->regmap, ISL29018_REG_ADD_COMMAND2,
+ ISL29018_CMD2_SCHEME_MASK,
+ scheme << ISL29018_CMD2_SCHEME_SHIFT);
+ if (status) {
+ dev_err(dev, "Error in setting operating mode\n");
+ return status;
+ }
+
+ prox_data = isl29018_read_sensor_input(chip,
+ ISL29018_CMD1_OPMODE_PROX_ONCE);
+ if (prox_data < 0)
+ return prox_data;
+
+ if (scheme == 1) {
+ *near_ir = prox_data;
+ return 0;
+ }
+
+ ir_data = isl29018_read_sensor_input(chip,
+ ISL29018_CMD1_OPMODE_IR_ONCE);
+ if (ir_data < 0)
+ return ir_data;
+
+ if (prox_data >= ir_data)
+ *near_ir = prox_data - ir_data;
+ else
+ *near_ir = 0;
+
+ return 0;
+}
+
+static ssize_t in_illuminance_scale_available_show
+ (struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct isl29018_chip *chip = iio_priv(indio_dev);
+ unsigned int i;
+ int len = 0;
+
+ mutex_lock(&chip->lock);
+ for (i = 0; i < ARRAY_SIZE(isl29018_scales[chip->int_time]); ++i)
+ len += sprintf(buf + len, "%d.%06d ",
+ isl29018_scales[chip->int_time][i].scale,
+ isl29018_scales[chip->int_time][i].uscale);
+ mutex_unlock(&chip->lock);
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+static ssize_t in_illuminance_integration_time_available_show
+ (struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct isl29018_chip *chip = iio_priv(indio_dev);
+ unsigned int i;
+ int len = 0;
+
+ for (i = 0; i < ARRAY_SIZE(isl29018_int_utimes[chip->type]); ++i)
+ len += sprintf(buf + len, "0.%06d ",
+ isl29018_int_utimes[chip->type][i]);
+
+ buf[len - 1] = '\n';
+
+ return len;
+}
+
+/*
+ * From ISL29018 Data Sheet (FN6619.4, Oct 8, 2012) regarding the
+ * infrared suppression:
+ *
+ * Proximity Sensing Scheme: Bit 7. This bit programs the function
+ * of the proximity detection. Logic 0 of this bit, Scheme 0, makes
+ * full n (4, 8, 12, 16) bits (unsigned) proximity detection. The range
+ * of Scheme 0 proximity count is from 0 to 2^n. Logic 1 of this bit,
+ * Scheme 1, makes n-1 (3, 7, 11, 15) bits (2's complementary)
+ * proximity_less_ambient detection. The range of Scheme 1
+ * proximity count is from -2^(n-1) to 2^(n-1) . The sign bit is extended
+ * for resolutions less than 16. While Scheme 0 has wider dynamic
+ * range, Scheme 1 proximity detection is less affected by the
+ * ambient IR noise variation.
+ *
+ * 0 Sensing IR from LED and ambient
+ * 1 Sensing IR from LED with ambient IR rejection
+ */
+static ssize_t proximity_on_chip_ambient_infrared_suppression_show
+ (struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct isl29018_chip *chip = iio_priv(indio_dev);
+
+ /*
+ * Return the "proximity scheme" i.e. if the chip does on chip
+ * infrared suppression (1 means perform on chip suppression)
+ */
+ return sprintf(buf, "%d\n", chip->prox_scheme);
+}
+
+static ssize_t proximity_on_chip_ambient_infrared_suppression_store
+ (struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct iio_dev *indio_dev = dev_to_iio_dev(dev);
+ struct isl29018_chip *chip = iio_priv(indio_dev);
+ int val;
+
+ if (kstrtoint(buf, 10, &val))
+ return -EINVAL;
+ if (!(val == 0 || val == 1))
+ return -EINVAL;
+
+ /*
+ * Get the "proximity scheme" i.e. if the chip does on chip
+ * infrared suppression (1 means perform on chip suppression)
+ */
+ mutex_lock(&chip->lock);
+ chip->prox_scheme = val;
+ mutex_unlock(&chip->lock);
+
+ return count;
+}
+
+static int isl29018_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int val,
+ int val2,
+ long mask)
+{
+ struct isl29018_chip *chip = iio_priv(indio_dev);
+ int ret = -EINVAL;
+
+ mutex_lock(&chip->lock);
+ if (chip->suspended) {
+ ret = -EBUSY;
+ goto write_done;
+ }
+ switch (mask) {
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_LIGHT) {
+ chip->calibscale = val;
+ chip->ucalibscale = val2;
+ ret = 0;
+ }
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type == IIO_LIGHT && !val)
+ ret = isl29018_set_integration_time(chip, val2);
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ if (chan->type == IIO_LIGHT)
+ ret = isl29018_set_scale(chip, val, val2);
+ break;
+ default:
+ break;
+ }
+
+write_done:
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+static int isl29018_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val,
+ int *val2,
+ long mask)
+{
+ int ret = -EINVAL;
+ struct isl29018_chip *chip = iio_priv(indio_dev);
+
+ mutex_lock(&chip->lock);
+ if (chip->suspended) {
+ ret = -EBUSY;
+ goto read_done;
+ }
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ case IIO_CHAN_INFO_PROCESSED:
+ switch (chan->type) {
+ case IIO_LIGHT:
+ ret = isl29018_read_lux(chip, val);
+ break;
+ case IIO_INTENSITY:
+ ret = isl29018_read_ir(chip, val);
+ break;
+ case IIO_PROXIMITY:
+ ret = isl29018_read_proximity_ir(chip,
+ chip->prox_scheme,
+ val);
+ break;
+ default:
+ break;
+ }
+ if (!ret)
+ ret = IIO_VAL_INT;
+ break;
+ case IIO_CHAN_INFO_INT_TIME:
+ if (chan->type == IIO_LIGHT) {
+ *val = 0;
+ *val2 = isl29018_int_utimes[chip->type][chip->int_time];
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ }
+ break;
+ case IIO_CHAN_INFO_SCALE:
+ if (chan->type == IIO_LIGHT) {
+ *val = chip->scale.scale;
+ *val2 = chip->scale.uscale;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ }
+ break;
+ case IIO_CHAN_INFO_CALIBSCALE:
+ if (chan->type == IIO_LIGHT) {
+ *val = chip->calibscale;
+ *val2 = chip->ucalibscale;
+ ret = IIO_VAL_INT_PLUS_MICRO;
+ }
+ break;
+ default:
+ break;
+ }
+
+read_done:
+ mutex_unlock(&chip->lock);
+
+ return ret;
+}
+
+#define ISL29018_LIGHT_CHANNEL { \
+ .type = IIO_LIGHT, \
+ .indexed = 1, \
+ .channel = 0, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) | \
+ BIT(IIO_CHAN_INFO_CALIBSCALE) | \
+ BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_INT_TIME), \
+}
+
+#define ISL29018_IR_CHANNEL { \
+ .type = IIO_INTENSITY, \
+ .modified = 1, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .channel2 = IIO_MOD_LIGHT_IR, \
+}
+
+#define ISL29018_PROXIMITY_CHANNEL { \
+ .type = IIO_PROXIMITY, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+}
+
+static const struct iio_chan_spec isl29018_channels[] = {
+ ISL29018_LIGHT_CHANNEL,
+ ISL29018_IR_CHANNEL,
+ ISL29018_PROXIMITY_CHANNEL,
+};
+
+static const struct iio_chan_spec isl29023_channels[] = {
+ ISL29018_LIGHT_CHANNEL,
+ ISL29018_IR_CHANNEL,
+};
+
+static IIO_DEVICE_ATTR_RO(in_illuminance_integration_time_available, 0);
+static IIO_DEVICE_ATTR_RO(in_illuminance_scale_available, 0);
+static IIO_DEVICE_ATTR_RW(proximity_on_chip_ambient_infrared_suppression, 0);
+
+#define ISL29018_DEV_ATTR(name) (&iio_dev_attr_##name.dev_attr.attr)
+
+static struct attribute *isl29018_attributes[] = {
+ ISL29018_DEV_ATTR(in_illuminance_scale_available),
+ ISL29018_DEV_ATTR(in_illuminance_integration_time_available),
+ ISL29018_DEV_ATTR(proximity_on_chip_ambient_infrared_suppression),
+ NULL
+};
+
+static struct attribute *isl29023_attributes[] = {
+ ISL29018_DEV_ATTR(in_illuminance_scale_available),
+ ISL29018_DEV_ATTR(in_illuminance_integration_time_available),
+ NULL
+};
+
+static const struct attribute_group isl29018_group = {
+ .attrs = isl29018_attributes,
+};
+
+static const struct attribute_group isl29023_group = {
+ .attrs = isl29023_attributes,
+};
+
+enum {
+ isl29018,
+ isl29023,
+ isl29035,
+};
+
+static int isl29018_chip_init(struct isl29018_chip *chip)
+{
+ int status;
+ struct device *dev = regmap_get_device(chip->regmap);
+
+ if (chip->type == isl29035) {
+ unsigned int id;
+
+ status = regmap_read(chip->regmap, ISL29035_REG_DEVICE_ID, &id);
+ if (status < 0) {
+ dev_err(dev,
+ "Error reading ID register with error %d\n",
+ status);
+ return status;
+ }
+
+ id = (id & ISL29035_DEVICE_ID_MASK) >> ISL29035_DEVICE_ID_SHIFT;
+
+ if (id != ISL29035_DEVICE_ID)
+ return -ENODEV;
+
+ /* Clear brownout bit */
+ status = regmap_update_bits(chip->regmap,
+ ISL29035_REG_DEVICE_ID,
+ ISL29035_BOUT_MASK, 0);
+ if (status < 0)
+ return status;
+ }
+
+ /*
+ * Code added per Intersil Application Note 1534:
+ * When VDD sinks to approximately 1.8V or below, some of
+ * the part's registers may change their state. When VDD
+ * recovers to 2.25V (or greater), the part may thus be in an
+ * unknown mode of operation. The user can return the part to
+ * a known mode of operation either by (a) setting VDD = 0V for
+ * 1 second or more and then powering back up with a slew rate
+ * of 0.5V/ms or greater, or (b) via I2C disable all ALS/PROX
+ * conversions, clear the test registers, and then rewrite all
+ * registers to the desired values.
+ * ...
+ * For ISL29011, ISL29018, ISL29021, ISL29023
+ * 1. Write 0x00 to register 0x08 (TEST)
+ * 2. Write 0x00 to register 0x00 (CMD1)
+ * 3. Rewrite all registers to the desired values
+ *
+ * ISL29018 Data Sheet (FN6619.1, Feb 11, 2010) essentially says
+ * the same thing EXCEPT the data sheet asks for a 1ms delay after
+ * writing the CMD1 register.
+ */
+ status = regmap_write(chip->regmap, ISL29018_REG_TEST, 0x0);
+ if (status < 0) {
+ dev_err(dev, "Failed to clear isl29018 TEST reg.(%d)\n",
+ status);
+ return status;
+ }
+
+ /*
+ * See Intersil AN1534 comments above.
+ * "Operating Mode" (COMMAND1) register is reprogrammed when
+ * data is read from the device.
+ */
+ status = regmap_write(chip->regmap, ISL29018_REG_ADD_COMMAND1, 0);
+ if (status < 0) {
+ dev_err(dev, "Failed to clear isl29018 CMD1 reg.(%d)\n",
+ status);
+ return status;
+ }
+
+ usleep_range(1000, 2000); /* per data sheet, page 10 */
+
+ /* Set defaults */
+ status = isl29018_set_scale(chip, chip->scale.scale,
+ chip->scale.uscale);
+ if (status < 0) {
+ dev_err(dev, "Init of isl29018 fails\n");
+ return status;
+ }
+
+ status = isl29018_set_integration_time(chip,
+ isl29018_int_utimes[chip->type][chip->int_time]);
+ if (status < 0)
+ dev_err(dev, "Init of isl29018 fails\n");
+
+ return status;
+}
+
+static const struct iio_info isl29018_info = {
+ .attrs = &isl29018_group,
+ .driver_module = THIS_MODULE,
+ .read_raw = isl29018_read_raw,
+ .write_raw = isl29018_write_raw,
+};
+
+static const struct iio_info isl29023_info = {
+ .attrs = &isl29023_group,
+ .driver_module = THIS_MODULE,
+ .read_raw = isl29018_read_raw,
+ .write_raw = isl29018_write_raw,
+};
+
+static bool isl29018_is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case ISL29018_REG_ADD_DATA_LSB:
+ case ISL29018_REG_ADD_DATA_MSB:
+ case ISL29018_REG_ADD_COMMAND1:
+ case ISL29018_REG_TEST:
+ case ISL29035_REG_DEVICE_ID:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config isl29018_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_reg = isl29018_is_volatile_reg,
+ .max_register = ISL29018_REG_TEST,
+ .num_reg_defaults_raw = ISL29018_REG_TEST + 1,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static const struct regmap_config isl29035_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .volatile_reg = isl29018_is_volatile_reg,
+ .max_register = ISL29035_REG_DEVICE_ID,
+ .num_reg_defaults_raw = ISL29035_REG_DEVICE_ID + 1,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+struct isl29018_chip_info {
+ const struct iio_chan_spec *channels;
+ int num_channels;
+ const struct iio_info *indio_info;
+ const struct regmap_config *regmap_cfg;
+};
+
+static const struct isl29018_chip_info isl29018_chip_info_tbl[] = {
+ [isl29018] = {
+ .channels = isl29018_channels,
+ .num_channels = ARRAY_SIZE(isl29018_channels),
+ .indio_info = &isl29018_info,
+ .regmap_cfg = &isl29018_regmap_config,
+ },
+ [isl29023] = {
+ .channels = isl29023_channels,
+ .num_channels = ARRAY_SIZE(isl29023_channels),
+ .indio_info = &isl29023_info,
+ .regmap_cfg = &isl29018_regmap_config,
+ },
+ [isl29035] = {
+ .channels = isl29023_channels,
+ .num_channels = ARRAY_SIZE(isl29023_channels),
+ .indio_info = &isl29023_info,
+ .regmap_cfg = &isl29035_regmap_config,
+ },
+};
+
+static const char *isl29018_match_acpi_device(struct device *dev, int *data)
+{
+ const struct acpi_device_id *id;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+
+ if (!id)
+ return NULL;
+
+ *data = (int)id->driver_data;
+
+ return dev_name(dev);
+}
+
+static int isl29018_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct isl29018_chip *chip;
+ struct iio_dev *indio_dev;
+ int err;
+ const char *name = NULL;
+ int dev_id = 0;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ chip = iio_priv(indio_dev);
+
+ i2c_set_clientdata(client, indio_dev);
+
+ if (id) {
+ name = id->name;
+ dev_id = id->driver_data;
+ }
+
+ if (ACPI_HANDLE(&client->dev))
+ name = isl29018_match_acpi_device(&client->dev, &dev_id);
+
+ mutex_init(&chip->lock);
+
+ chip->type = dev_id;
+ chip->calibscale = 1;
+ chip->ucalibscale = 0;
+ chip->int_time = ISL29018_INT_TIME_16;
+ chip->scale = isl29018_scales[chip->int_time][0];
+ chip->suspended = false;
+
+ chip->regmap = devm_regmap_init_i2c(client,
+ isl29018_chip_info_tbl[dev_id].regmap_cfg);
+ if (IS_ERR(chip->regmap)) {
+ err = PTR_ERR(chip->regmap);
+ dev_err(&client->dev, "regmap initialization fails: %d\n", err);
+ return err;
+ }
+
+ err = isl29018_chip_init(chip);
+ if (err)
+ return err;
+
+ indio_dev->info = isl29018_chip_info_tbl[dev_id].indio_info;
+ indio_dev->channels = isl29018_chip_info_tbl[dev_id].channels;
+ indio_dev->num_channels = isl29018_chip_info_tbl[dev_id].num_channels;
+ indio_dev->name = name;
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ return devm_iio_device_register(&client->dev, indio_dev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int isl29018_suspend(struct device *dev)
+{
+ struct isl29018_chip *chip = iio_priv(dev_get_drvdata(dev));
+
+ mutex_lock(&chip->lock);
+
+ /*
+ * Since this driver uses only polling commands, we are by default in
+ * auto shutdown (ie, power-down) mode.
+ * So we do not have much to do here.
+ */
+ chip->suspended = true;
+
+ mutex_unlock(&chip->lock);
+
+ return 0;
+}
+
+static int isl29018_resume(struct device *dev)
+{
+ struct isl29018_chip *chip = iio_priv(dev_get_drvdata(dev));
+ int err;
+
+ mutex_lock(&chip->lock);
+
+ err = isl29018_chip_init(chip);
+ if (!err)
+ chip->suspended = false;
+
+ mutex_unlock(&chip->lock);
+
+ return err;
+}
+
+static SIMPLE_DEV_PM_OPS(isl29018_pm_ops, isl29018_suspend, isl29018_resume);
+#define ISL29018_PM_OPS (&isl29018_pm_ops)
+#else
+#define ISL29018_PM_OPS NULL
+#endif
+
+static const struct acpi_device_id isl29018_acpi_match[] = {
+ {"ISL29018", isl29018},
+ {"ISL29023", isl29023},
+ {"ISL29035", isl29035},
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, isl29018_acpi_match);
+
+static const struct i2c_device_id isl29018_id[] = {
+ {"isl29018", isl29018},
+ {"isl29023", isl29023},
+ {"isl29035", isl29035},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, isl29018_id);
+
+static const struct of_device_id isl29018_of_match[] = {
+ { .compatible = "isil,isl29018", },
+ { .compatible = "isil,isl29023", },
+ { .compatible = "isil,isl29035", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, isl29018_of_match);
+
+static struct i2c_driver isl29018_driver = {
+ .driver = {
+ .name = "isl29018",
+ .acpi_match_table = ACPI_PTR(isl29018_acpi_match),
+ .pm = ISL29018_PM_OPS,
+ .of_match_table = isl29018_of_match,
+ },
+ .probe = isl29018_probe,
+ .id_table = isl29018_id,
+};
+module_i2c_driver(isl29018_driver);
+
+MODULE_DESCRIPTION("ISL29018 Ambient Light Sensor driver");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-28 12:18:27 +0000