// SPDX-License-Identifier: GPL-2.0-only /* * Support for Vishay VCNL3020 proximity sensor on i2c bus. * Based on Vishay VCNL4000 driver code. */ #include <linux/module.h> #include <linux/i2c.h> #include <linux/err.h> #include <linux/delay.h> #include <linux/regmap.h> #include <linux/interrupt.h> #include <linux/iio/iio.h> #include <linux/iio/events.h> #define VCNL3020_PROD_ID … #define VCNL_COMMAND … #define VCNL_PROD_REV … #define VCNL_PROXIMITY_RATE … #define VCNL_LED_CURRENT … #define VCNL_PS_RESULT_HI … #define VCNL_PS_RESULT_LO … #define VCNL_PS_ICR … #define VCNL_PS_LO_THR_HI … #define VCNL_PS_LO_THR_LO … #define VCNL_PS_HI_THR_HI … #define VCNL_PS_HI_THR_LO … #define VCNL_ISR … #define VCNL_PS_MOD_ADJ … /* Bit masks for COMMAND register */ #define VCNL_PS_RDY … #define VCNL_PS_OD … /* Enables periodic proximity measurement */ #define VCNL_PS_EN … /* Enables state machine and LP oscillator for self timed measurements */ #define VCNL_PS_SELFTIMED_EN … /* Bit masks for ICR */ /* Enable interrupts on low or high thresholds */ #define VCNL_ICR_THRES_EN … /* Bit masks for ISR */ #define VCNL_INT_TH_HI … #define VCNL_INT_TH_LOW … #define VCNL_ON_DEMAND_TIMEOUT_US … #define VCNL_POLL_US … static const int vcnl3020_prox_sampling_frequency[][2] = …; /** * struct vcnl3020_data - vcnl3020 specific data. * @regmap: device register map. * @dev: vcnl3020 device. * @rev: revision id. * @lock: lock for protecting access to device hardware registers. * @buf: __be16 buffer. */ struct vcnl3020_data { … }; /** * struct vcnl3020_property - vcnl3020 property. * @name: property name. * @reg: i2c register offset. * @conversion_func: conversion function. */ struct vcnl3020_property { … }; static u32 microamp_to_reg(u32 *val) { /* * An example of conversion from uA to reg val: * 200000 uA == 200 mA == 20 */ return *val /= 10000; }; static struct vcnl3020_property vcnl3020_led_current_property = …; static int vcnl3020_get_and_apply_property(struct vcnl3020_data *data, struct vcnl3020_property prop) { … } static int vcnl3020_init(struct vcnl3020_data *data) { int rc; unsigned int reg; rc = regmap_read(data->regmap, VCNL_PROD_REV, ®); if (rc) { dev_err(data->dev, "Error (%d) reading product revision\n", rc); return rc; } if (reg != VCNL3020_PROD_ID) { dev_err(data->dev, "Product id (%x) did not match vcnl3020 (%x)\n", reg, VCNL3020_PROD_ID); return -ENODEV; } data->rev = reg; mutex_init(&data->lock); return vcnl3020_get_and_apply_property(data, vcnl3020_led_current_property); }; static bool vcnl3020_is_in_periodic_mode(struct vcnl3020_data *data) { … } static int vcnl3020_measure_proximity(struct vcnl3020_data *data, int *val) { … } static int vcnl3020_read_proxy_samp_freq(struct vcnl3020_data *data, int *val, int *val2) { … } static int vcnl3020_write_proxy_samp_freq(struct vcnl3020_data *data, int val, int val2) { … } static bool vcnl3020_is_thr_enabled(struct vcnl3020_data *data) { … } static int vcnl3020_read_event(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 vcnl3020_write_event(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 vcnl3020_enable_periodic(struct iio_dev *indio_dev, struct vcnl3020_data *data) { … } static int vcnl3020_disable_periodic(struct iio_dev *indio_dev, struct vcnl3020_data *data) { … } static int vcnl3020_config_threshold(struct iio_dev *indio_dev, bool state) { … } static int vcnl3020_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 int vcnl3020_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 const struct iio_event_spec vcnl3020_event_spec[] = …; static const struct iio_chan_spec vcnl3020_channels[] = …; static int vcnl3020_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int vcnl3020_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static int vcnl3020_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask) { … } static const struct iio_info vcnl3020_info = …; static const struct regmap_config vcnl3020_regmap_config = …; static irqreturn_t vcnl3020_handle_irq_thread(int irq, void *p) { … } static int vcnl3020_probe(struct i2c_client *client) { … } static const struct of_device_id vcnl3020_of_match[] = …; MODULE_DEVICE_TABLE(of, vcnl3020_of_match); static struct i2c_driver vcnl3020_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux