diff options
Diffstat (limited to 'drivers/iio/accel/adxl367_i2c.c')
-rw-r--r-- | drivers/iio/accel/adxl367_i2c.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/drivers/iio/accel/adxl367_i2c.c b/drivers/iio/accel/adxl367_i2c.c new file mode 100644 index 0000000000..b595fe94f3 --- /dev/null +++ b/drivers/iio/accel/adxl367_i2c.c @@ -0,0 +1,89 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2021 Analog Devices, Inc. + * Author: Cosmin Tanislav <cosmin.tanislav@analog.com> + */ + +#include <linux/i2c.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/regmap.h> + +#include "adxl367.h" + +#define ADXL367_I2C_FIFO_DATA 0x42 + +struct adxl367_i2c_state { + struct regmap *regmap; +}; + +static bool adxl367_readable_noinc_reg(struct device *dev, unsigned int reg) +{ + return reg == ADXL367_I2C_FIFO_DATA; +} + +static int adxl367_i2c_read_fifo(void *context, __be16 *fifo_buf, + unsigned int fifo_entries) +{ + struct adxl367_i2c_state *st = context; + + return regmap_noinc_read(st->regmap, ADXL367_I2C_FIFO_DATA, fifo_buf, + fifo_entries * sizeof(*fifo_buf)); +} + +static const struct regmap_config adxl367_i2c_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .readable_noinc_reg = adxl367_readable_noinc_reg, +}; + +static const struct adxl367_ops adxl367_i2c_ops = { + .read_fifo = adxl367_i2c_read_fifo, +}; + +static int adxl367_i2c_probe(struct i2c_client *client) +{ + struct adxl367_i2c_state *st; + struct regmap *regmap; + + st = devm_kzalloc(&client->dev, sizeof(*st), GFP_KERNEL); + if (!st) + return -ENOMEM; + + regmap = devm_regmap_init_i2c(client, &adxl367_i2c_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + st->regmap = regmap; + + return adxl367_probe(&client->dev, &adxl367_i2c_ops, st, regmap, + client->irq); +} + +static const struct i2c_device_id adxl367_i2c_id[] = { + { "adxl367", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, adxl367_i2c_id); + +static const struct of_device_id adxl367_of_match[] = { + { .compatible = "adi,adxl367" }, + { }, +}; +MODULE_DEVICE_TABLE(of, adxl367_of_match); + +static struct i2c_driver adxl367_i2c_driver = { + .driver = { + .name = "adxl367_i2c", + .of_match_table = adxl367_of_match, + }, + .probe = adxl367_i2c_probe, + .id_table = adxl367_i2c_id, +}; + +module_i2c_driver(adxl367_i2c_driver); + +MODULE_IMPORT_NS(IIO_ADXL367); +MODULE_AUTHOR("Cosmin Tanislav <cosmin.tanislav@analog.com>"); +MODULE_DESCRIPTION("Analog Devices ADXL367 3-axis accelerometer I2C driver"); +MODULE_LICENSE("GPL"); |