// SPDX-License-Identifier: GPL-2.0-only /* * vl6180.c - Support for STMicroelectronics VL6180 ALS, range and proximity * sensor * * Copyright 2017 Peter Meerwald-Stadler <[email protected]> * Copyright 2017 Manivannan Sadhasivam <[email protected]> * * IIO driver for VL6180 (7-bit I2C slave address 0x29) * * Range: 0 to 100mm * ALS: < 1 Lux up to 100 kLux * IR: 850nm * * TODO: irq, threshold events, continuous mode, hardware buffer */ #include <linux/module.h> #include <linux/mod_devicetable.h> #include <linux/i2c.h> #include <linux/mutex.h> #include <linux/err.h> #include <linux/delay.h> #include <linux/util_macros.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #define VL6180_DRV_NAME … /* Device identification register and value */ #define VL6180_MODEL_ID … #define VL6180_MODEL_ID_VAL … /* Configuration registers */ #define VL6180_INTR_CONFIG … #define VL6180_INTR_CLEAR … #define VL6180_OUT_OF_RESET … #define VL6180_HOLD … #define VL6180_RANGE_START … #define VL6180_ALS_START … #define VL6180_ALS_GAIN … #define VL6180_ALS_IT … /* Status registers */ #define VL6180_RANGE_STATUS … #define VL6180_ALS_STATUS … #define VL6180_INTR_STATUS … /* Result value registers */ #define VL6180_ALS_VALUE … #define VL6180_RANGE_VALUE … #define VL6180_RANGE_RATE … /* bits of the RANGE_START and ALS_START register */ #define VL6180_MODE_CONT … #define VL6180_STARTSTOP … /* bits of the INTR_STATUS and INTR_CONFIG register */ #define VL6180_ALS_READY … #define VL6180_RANGE_READY … /* bits of the INTR_CLEAR register */ #define VL6180_CLEAR_ERROR … #define VL6180_CLEAR_ALS … #define VL6180_CLEAR_RANGE … /* bits of the HOLD register */ #define VL6180_HOLD_ON … /* default value for the ALS_IT register */ #define VL6180_ALS_IT_100 … /* values for the ALS_GAIN register */ #define VL6180_ALS_GAIN_1 … #define VL6180_ALS_GAIN_1_25 … #define VL6180_ALS_GAIN_1_67 … #define VL6180_ALS_GAIN_2_5 … #define VL6180_ALS_GAIN_5 … #define VL6180_ALS_GAIN_10 … #define VL6180_ALS_GAIN_20 … #define VL6180_ALS_GAIN_40 … struct vl6180_data { … }; enum { … }; /** * struct vl6180_chan_regs - Registers for accessing channels * @drdy_mask: Data ready bit in status register * @start_reg: Conversion start register * @value_reg: Result value register * @word: Register word length */ struct vl6180_chan_regs { … }; static const struct vl6180_chan_regs vl6180_chan_regs_table[] = …; static int vl6180_read(struct i2c_client *client, u16 cmd, void *databuf, u8 len) { … } static int vl6180_read_byte(struct i2c_client *client, u16 cmd) { … } static int vl6180_read_word(struct i2c_client *client, u16 cmd) { … } static int vl6180_write_byte(struct i2c_client *client, u16 cmd, u8 val) { … } static int vl6180_write_word(struct i2c_client *client, u16 cmd, u16 val) { … } static int vl6180_measure(struct vl6180_data *data, int addr) { … } static const struct iio_chan_spec vl6180_channels[] = …; /* * Available Ambient Light Sensor gain settings, 1/1000th, and * corresponding setting for the VL6180_ALS_GAIN register */ static const int vl6180_als_gain_tab[8] = …; static const u8 vl6180_als_gain_tab_bits[8] = …; static int vl6180_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static IIO_CONST_ATTR(als_gain_available, "1 1.25 1.67 2.5 5 10 20 40"); static struct attribute *vl6180_attributes[] = …; static const struct attribute_group vl6180_attribute_group = …; /* HOLD is needed before updating any config registers */ static int vl6180_hold(struct vl6180_data *data, bool hold) { … } static int vl6180_set_als_gain(struct vl6180_data *data, int val, int val2) { … } static int vl6180_set_it(struct vl6180_data *data, int val, int val2) { … } static int vl6180_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static const struct iio_info vl6180_info = …; static int vl6180_init(struct vl6180_data *data) { … } static int vl6180_probe(struct i2c_client *client) { … } static const struct of_device_id vl6180_of_match[] = …; MODULE_DEVICE_TABLE(of, vl6180_of_match); static const struct i2c_device_id vl6180_id[] = …; MODULE_DEVICE_TABLE(i2c, vl6180_id); static struct i2c_driver vl6180_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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