// SPDX-License-Identifier: GPL-2.0-or-later /* * 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. */ #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/regulator/consumer.h> #include <linux/slab.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/acpi.h> #define ISL29018_CONV_TIME_MS … #define ISL29018_REG_ADD_COMMAND1 … #define ISL29018_CMD1_OPMODE_SHIFT … #define ISL29018_CMD1_OPMODE_MASK … #define ISL29018_CMD1_OPMODE_POWER_DOWN … #define ISL29018_CMD1_OPMODE_ALS_ONCE … #define ISL29018_CMD1_OPMODE_IR_ONCE … #define ISL29018_CMD1_OPMODE_PROX_ONCE … #define ISL29018_REG_ADD_COMMAND2 … #define ISL29018_CMD2_RESOLUTION_SHIFT … #define ISL29018_CMD2_RESOLUTION_MASK … #define ISL29018_CMD2_RANGE_SHIFT … #define ISL29018_CMD2_RANGE_MASK … #define ISL29018_CMD2_SCHEME_SHIFT … #define ISL29018_CMD2_SCHEME_MASK … #define ISL29018_REG_ADD_DATA_LSB … #define ISL29018_REG_ADD_DATA_MSB … #define ISL29018_REG_TEST … #define ISL29018_TEST_SHIFT … #define ISL29018_TEST_MASK … #define ISL29035_REG_DEVICE_ID … #define ISL29035_DEVICE_ID_SHIFT … #define ISL29035_DEVICE_ID_MASK … #define ISL29035_DEVICE_ID … #define ISL29035_BOUT_SHIFT … #define ISL29035_BOUT_MASK … enum isl29018_int_time { … }; static const unsigned int isl29018_int_utimes[3][4] = …; static const struct isl29018_scale { … } isl29018_scales[4][4] = …; struct isl29018_chip { … }; static int isl29018_set_integration_time(struct isl29018_chip *chip, unsigned int utime) { … } static int isl29018_set_scale(struct isl29018_chip *chip, int scale, int uscale) { … } static int isl29018_read_sensor_input(struct isl29018_chip *chip, int mode) { … } static int isl29018_read_lux(struct isl29018_chip *chip, int *lux) { … } static int isl29018_read_ir(struct isl29018_chip *chip, int *ir) { … } static int isl29018_read_proximity_ir(struct isl29018_chip *chip, int scheme, int *near_ir) { … } static ssize_t in_illuminance_scale_available_show (struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t in_illuminance_integration_time_available_show (struct device *dev, struct device_attribute *attr, char *buf) { … } /* * 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) { … } static ssize_t proximity_on_chip_ambient_infrared_suppression_store (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static int isl29018_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static int isl29018_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } #define ISL29018_LIGHT_CHANNEL … #define ISL29018_IR_CHANNEL … #define ISL29018_PROXIMITY_CHANNEL … static const struct iio_chan_spec isl29018_channels[] = …; static const struct iio_chan_spec isl29023_channels[] = …; 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) … static struct attribute *isl29018_attributes[] = …; static struct attribute *isl29023_attributes[] = …; static const struct attribute_group isl29018_group = …; static const struct attribute_group isl29023_group = …; enum { … }; static int isl29018_chip_init(struct isl29018_chip *chip) { … } static const struct iio_info isl29018_info = …; static const struct iio_info isl29023_info = …; static bool isl29018_is_volatile_reg(struct device *dev, unsigned int reg) { … } static const struct regmap_config isl29018_regmap_config = …; static const struct regmap_config isl29035_regmap_config = …; struct isl29018_chip_info { … }; static const struct isl29018_chip_info isl29018_chip_info_tbl[] = …; static const char *isl29018_match_acpi_device(struct device *dev, int *data) { … } static void isl29018_disable_regulator_action(void *_data) { … } static int isl29018_probe(struct i2c_client *client) { … } static int isl29018_suspend(struct device *dev) { … } static int isl29018_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(isl29018_pm_ops, isl29018_suspend, isl29018_resume); #ifdef CONFIG_ACPI static const struct acpi_device_id isl29018_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, isl29018_acpi_match); #endif static const struct i2c_device_id isl29018_id[] = …; MODULE_DEVICE_TABLE(i2c, isl29018_id); static const struct of_device_id isl29018_of_match[] = …; MODULE_DEVICE_TABLE(of, isl29018_of_match); static struct i2c_driver isl29018_driver = …; module_i2c_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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