mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 04:11:49 +00:00
d0b7fea58a
add support to STMicroelectronics LIS2MDL magnetometer in st_magn framework http://www.st.com/resource/en/datasheet/lis2mdl.pdf Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
100 lines
2.2 KiB
C
100 lines
2.2 KiB
C
/*
|
|
* STMicroelectronics magnetometers driver
|
|
*
|
|
* Copyright 2012-2013 STMicroelectronics Inc.
|
|
*
|
|
* Denis Ciocca <denis.ciocca@st.com>
|
|
*
|
|
* Licensed under the GPL-2.
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/iio/iio.h>
|
|
|
|
#include <linux/iio/common/st_sensors.h>
|
|
#include <linux/iio/common/st_sensors_spi.h>
|
|
#include "st_magn.h"
|
|
|
|
#ifdef CONFIG_OF
|
|
/*
|
|
* For new single-chip sensors use <device_name> as compatible string.
|
|
* For old single-chip devices keep <device_name>-magn to maintain
|
|
* compatibility
|
|
*/
|
|
static const struct of_device_id st_magn_of_match[] = {
|
|
{
|
|
.compatible = "st,lis3mdl-magn",
|
|
.data = LIS3MDL_MAGN_DEV_NAME,
|
|
},
|
|
{
|
|
.compatible = "st,lsm303agr-magn",
|
|
.data = LSM303AGR_MAGN_DEV_NAME,
|
|
},
|
|
{
|
|
.compatible = "st,lis2mdl",
|
|
.data = LIS2MDL_MAGN_DEV_NAME,
|
|
},
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(of, st_magn_of_match);
|
|
#else
|
|
#define st_magn_of_match NULL
|
|
#endif
|
|
|
|
static int st_magn_spi_probe(struct spi_device *spi)
|
|
{
|
|
struct iio_dev *indio_dev;
|
|
struct st_sensor_data *mdata;
|
|
int err;
|
|
|
|
indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata));
|
|
if (!indio_dev)
|
|
return -ENOMEM;
|
|
|
|
mdata = iio_priv(indio_dev);
|
|
|
|
st_sensors_of_name_probe(&spi->dev, st_magn_of_match,
|
|
spi->modalias, sizeof(spi->modalias));
|
|
st_sensors_spi_configure(indio_dev, spi, mdata);
|
|
|
|
err = st_magn_common_probe(indio_dev);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int st_magn_spi_remove(struct spi_device *spi)
|
|
{
|
|
struct iio_dev *indio_dev = spi_get_drvdata(spi);
|
|
st_magn_common_remove(indio_dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct spi_device_id st_magn_id_table[] = {
|
|
{ LIS3MDL_MAGN_DEV_NAME },
|
|
{ LSM303AGR_MAGN_DEV_NAME },
|
|
{ LIS2MDL_MAGN_DEV_NAME },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(spi, st_magn_id_table);
|
|
|
|
static struct spi_driver st_magn_driver = {
|
|
.driver = {
|
|
.name = "st-magn-spi",
|
|
.of_match_table = of_match_ptr(st_magn_of_match),
|
|
},
|
|
.probe = st_magn_spi_probe,
|
|
.remove = st_magn_spi_remove,
|
|
.id_table = st_magn_id_table,
|
|
};
|
|
module_spi_driver(st_magn_driver);
|
|
|
|
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
|
|
MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver");
|
|
MODULE_LICENSE("GPL v2");
|