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/*
* STMicroelectronics st_lsm6dsx i2c driver
*
* Copyright 2016 STMicroelectronics Inc.
*
* Lorenzo Bianconi <lorenzo.bianconi@st.com>
* Denis Ciocca <denis.ciocca@st.com>
*
* Licensed under the GPL-2.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <linux/of.h>
#include "st_lsm6dsx.h"
static int st_lsm6dsx_i2c_read(struct device *dev, u8 addr, int len, u8 *data)
{
struct i2c_client *client = to_i2c_client(dev);
struct i2c_msg msg[2];
msg[0].addr = client->addr;
msg[0].flags = client->flags;
msg[0].len = 1;
msg[0].buf = &addr;
msg[1].addr = client->addr;
msg[1].flags = client->flags | I2C_M_RD;
msg[1].len = len;
msg[1].buf = data;
return i2c_transfer(client->adapter, msg, 2);
}
static int st_lsm6dsx_i2c_write(struct device *dev, u8 addr, int len, u8 *data)
{
struct i2c_client *client = to_i2c_client(dev);
struct i2c_msg msg;
u8 send[len + 1];
send[0] = addr;
memcpy(&send[1], data, len * sizeof(u8));
msg.addr = client->addr;
msg.flags = client->flags;
msg.len = len + 1;
msg.buf = send;
return i2c_transfer(client->adapter, &msg, 1);
}
static const struct st_lsm6dsx_transfer_function st_lsm6dsx_transfer_fn = {
.read = st_lsm6dsx_i2c_read,
.write = st_lsm6dsx_i2c_write,
};
static int st_lsm6dsx_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
return st_lsm6dsx_probe(&client->dev, client->irq,
(int)id->driver_data,
&st_lsm6dsx_transfer_fn);
}
static const struct of_device_id st_lsm6dsx_i2c_of_match[] = {
{
.compatible = "st,lsm6ds3",
.data = (void *)ST_LSM6DS3_ID,
},
{
.compatible = "st,lsm6ds3h",
.data = (void *)ST_LSM6DS3H_ID,
},
{
.compatible = "st,lsm6dsl",
.data = (void *)ST_LSM6DSL_ID,
},
{
.compatible = "st,lsm6dsm",
.data = (void *)ST_LSM6DSM_ID,
},
{},
};
MODULE_DEVICE_TABLE(of, st_lsm6dsx_i2c_of_match);
static const struct i2c_device_id st_lsm6dsx_i2c_id_table[] = {
{ ST_LSM6DS3_DEV_NAME, ST_LSM6DS3_ID },
{ ST_LSM6DS3H_DEV_NAME, ST_LSM6DS3H_ID },
{ ST_LSM6DSL_DEV_NAME, ST_LSM6DSL_ID },
{ ST_LSM6DSM_DEV_NAME, ST_LSM6DSM_ID },
{},
};
MODULE_DEVICE_TABLE(i2c, st_lsm6dsx_i2c_id_table);
static struct i2c_driver st_lsm6dsx_driver = {
.driver = {
.name = "st_lsm6dsx_i2c",
.of_match_table = of_match_ptr(st_lsm6dsx_i2c_of_match),
},
.probe = st_lsm6dsx_i2c_probe,
.id_table = st_lsm6dsx_i2c_id_table,
};
module_i2c_driver(st_lsm6dsx_driver);
MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i2c driver");
MODULE_LICENSE("GPL v2");
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