// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (c) 2015 Intel Corporation * * Driver for UPISEMI us5182d Proximity and Ambient Light Sensor. * * To do: Interrupt support. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/delay.h> #include <linux/i2c.h> #include <linux/iio/events.h> #include <linux/iio/iio.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/iio/sysfs.h> #include <linux/mutex.h> #include <linux/pm.h> #include <linux/pm_runtime.h> #define US5182D_REG_CFG0 … #define US5182D_CFG0_ONESHOT_EN … #define US5182D_CFG0_SHUTDOWN_EN … #define US5182D_CFG0_WORD_ENABLE … #define US5182D_CFG0_PROX … #define US5182D_CFG0_PX_IRQ … #define US5182D_REG_CFG1 … #define US5182D_CFG1_ALS_RES16 … #define US5182D_CFG1_AGAIN_DEFAULT … #define US5182D_REG_CFG2 … #define US5182D_CFG2_PX_RES16 … #define US5182D_CFG2_PXGAIN_DEFAULT … #define US5182D_REG_CFG3 … #define US5182D_CFG3_LED_CURRENT100 … #define US5182D_CFG3_INT_SOURCE_PX … #define US5182D_REG_CFG4 … /* * Registers for tuning the auto dark current cancelling feature. * DARK_TH(reg 0x27,0x28) - threshold (counts) for auto dark cancelling. * when ALS > DARK_TH --> ALS_Code = ALS - Upper(0x2A) * Dark * when ALS < DARK_TH --> ALS_Code = ALS - Lower(0x29) * Dark */ #define US5182D_REG_UDARK_TH … #define US5182D_REG_DARK_AUTO_EN … #define US5182D_REG_AUTO_LDARK_GAIN … #define US5182D_REG_AUTO_HDARK_GAIN … /* Thresholds for events: px low (0x08-l, 0x09-h), px high (0x0a-l 0x0b-h) */ #define US5182D_REG_PXL_TH … #define US5182D_REG_PXH_TH … #define US5182D_REG_PXL_TH_DEFAULT … #define US5182D_REG_PXH_TH_DEFAULT … #define US5182D_OPMODE_ALS … #define US5182D_OPMODE_PX … #define US5182D_OPMODE_SHIFT … #define US5182D_REG_DARK_AUTO_EN_DEFAULT … #define US5182D_REG_AUTO_LDARK_GAIN_DEFAULT … #define US5182D_REG_AUTO_HDARK_GAIN_DEFAULT … #define US5182D_REG_ADL … #define US5182D_REG_PDL … #define US5182D_REG_MODE_STORE … #define US5182D_STORE_MODE … #define US5182D_REG_CHIPID … #define US5182D_OPMODE_MASK … #define US5182D_AGAIN_MASK … #define US5182D_RESET_CHIP … #define US5182D_CHIPID … #define US5182D_DRV_NAME … #define US5182D_GA_RESOLUTION … #define US5182D_READ_BYTE … #define US5182D_READ_WORD … #define US5182D_OPSTORE_SLEEP_TIME … #define US5182D_SLEEP_MS … #define US5182D_PXH_TH_DISABLE … #define US5182D_PXL_TH_DISABLE … /* Available ranges: [12354, 7065, 3998, 2202, 1285, 498, 256, 138] lux */ static const int us5182d_scales[] = …; /* * Experimental thresholds that work with US5182D sensor on evaluation board * roughly between 12-32 lux */ static u16 us5182d_dark_ths_vals[] = …; enum mode { … }; enum pmode { … }; struct us5182d_data { … }; static IIO_CONST_ATTR(in_illuminance_scale_available, "0.0021 0.0039 0.0076 0.0196 0.0336 0.061 0.1078 0.1885"); static struct attribute *us5182d_attrs[] = …; static const struct attribute_group us5182d_attr_group = …; static const struct { … } us5182d_regvals[] = …; static const struct iio_event_spec us5182d_events[] = …; static const struct iio_chan_spec us5182d_channels[] = …; static int us5182d_oneshot_en(struct us5182d_data *data) { … } static int us5182d_set_opmode(struct us5182d_data *data, u8 mode) { … } static int us5182d_als_enable(struct us5182d_data *data) { … } static int us5182d_px_enable(struct us5182d_data *data) { … } static int us5182d_get_als(struct us5182d_data *data) { … } static int us5182d_get_px(struct us5182d_data *data) { … } static int us5182d_shutdown_en(struct us5182d_data *data, u8 state) { … } static int us5182d_set_power_state(struct us5182d_data *data, bool on) { … } static int us5182d_read_value(struct us5182d_data *data, struct iio_chan_spec const *chan) { … } static int us5182d_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } /** * us5182d_update_dark_th - update Darh_Th registers * @data: us5182d_data structure * @index: index in us5182d_dark_ths array to use for the updated value * * Function needs to be called with a lock held because it needs two i2c write * byte operations as these registers (0x27 0x28) don't work in word mode * accessing. */ static int us5182d_update_dark_th(struct us5182d_data *data, int index) { … } /** * us5182d_apply_scale - update the ALS scale * @data: us5182d_data structure * @index: index in us5182d_scales array to use for the updated value * * Function needs to be called with a lock held as we're having more than one * i2c operation. */ static int us5182d_apply_scale(struct us5182d_data *data, int index) { … } static int us5182d_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static int us5182d_setup_prox(struct iio_dev *indio_dev, enum iio_event_direction dir, u16 val) { … } static int us5182d_read_thresh(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int *val, int *val2) { … } static int us5182d_write_thresh(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int val, int val2) { … } static int us5182d_read_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir) { … } static int us5182d_write_event_config(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, int state) { … } static const struct iio_info us5182d_info = …; static int us5182d_reset(struct iio_dev *indio_dev) { … } static int us5182d_init(struct iio_dev *indio_dev) { … } static void us5182d_get_platform_data(struct iio_dev *indio_dev) { … } static int us5182d_dark_gain_config(struct iio_dev *indio_dev) { … } static irqreturn_t us5182d_irq_thread_handler(int irq, void *private) { … } static int us5182d_probe(struct i2c_client *client) { … } static void us5182d_remove(struct i2c_client *client) { … } static int us5182d_suspend(struct device *dev) { … } static int us5182d_resume(struct device *dev) { … } static const struct dev_pm_ops us5182d_pm_ops = …; static const struct acpi_device_id us5182d_acpi_match[] = …; MODULE_DEVICE_TABLE(acpi, us5182d_acpi_match); static const struct i2c_device_id us5182d_id[] = …; MODULE_DEVICE_TABLE(i2c, us5182d_id); static const struct of_device_id us5182d_of_match[] = …; MODULE_DEVICE_TABLE(of, us5182d_of_match); static struct i2c_driver us5182d_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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