diff options
Diffstat (limited to 'drivers/iio/light/isl29018.c')
| -rw-r--r-- | drivers/iio/light/isl29018.c | 847 |
1 files changed, 847 insertions, 0 deletions
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"); |