forked from Minki/linux
102 lines
2.4 KiB
C
102 lines
2.4 KiB
C
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/*
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* STMicroelectronics st_lsm6dsx i2c driver
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*
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* Copyright 2016 STMicroelectronics Inc.
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*
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* Lorenzo Bianconi <lorenzo.bianconi@st.com>
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* Denis Ciocca <denis.ciocca@st.com>
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*
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* Licensed under the GPL-2.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#include "st_lsm6dsx.h"
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static int st_lsm6dsx_i2c_read(struct device *dev, u8 addr, int len, u8 *data)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct i2c_msg msg[2];
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msg[0].addr = client->addr;
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msg[0].flags = client->flags;
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msg[0].len = 1;
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msg[0].buf = &addr;
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msg[1].addr = client->addr;
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msg[1].flags = client->flags | I2C_M_RD;
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msg[1].len = len;
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msg[1].buf = data;
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return i2c_transfer(client->adapter, msg, 2);
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}
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static int st_lsm6dsx_i2c_write(struct device *dev, u8 addr, int len, u8 *data)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct i2c_msg msg;
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u8 send[len + 1];
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send[0] = addr;
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memcpy(&send[1], data, len * sizeof(u8));
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msg.addr = client->addr;
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msg.flags = client->flags;
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msg.len = len + 1;
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msg.buf = send;
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return i2c_transfer(client->adapter, &msg, 1);
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}
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static const struct st_lsm6dsx_transfer_function st_lsm6dsx_transfer_fn = {
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.read = st_lsm6dsx_i2c_read,
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.write = st_lsm6dsx_i2c_write,
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};
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static int st_lsm6dsx_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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return st_lsm6dsx_probe(&client->dev, client->irq,
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(int)id->driver_data,
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&st_lsm6dsx_transfer_fn);
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}
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static const struct of_device_id st_lsm6dsx_i2c_of_match[] = {
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{
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.compatible = "st,lsm6ds3",
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.data = (void *)ST_LSM6DS3_ID,
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},
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{
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.compatible = "st,lsm6dsm",
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.data = (void *)ST_LSM6DSM_ID,
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, st_lsm6dsx_i2c_of_match);
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static const struct i2c_device_id st_lsm6dsx_i2c_id_table[] = {
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{ ST_LSM6DS3_DEV_NAME, ST_LSM6DS3_ID },
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{ ST_LSM6DSM_DEV_NAME, ST_LSM6DSM_ID },
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{},
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};
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MODULE_DEVICE_TABLE(i2c, st_lsm6dsx_i2c_id_table);
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static struct i2c_driver st_lsm6dsx_driver = {
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.driver = {
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.name = "st_lsm6dsx_i2c",
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.of_match_table = of_match_ptr(st_lsm6dsx_i2c_of_match),
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},
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.probe = st_lsm6dsx_i2c_probe,
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.id_table = st_lsm6dsx_i2c_id_table,
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};
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module_i2c_driver(st_lsm6dsx_driver);
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MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
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MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
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MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i2c driver");
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MODULE_LICENSE("GPL v2");
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