linux/drivers/iio/magnetometer/st_magn_spi.c
Andy Shevchenko ecb27c5e43 iio: st_sensors: Make use of device properties
Device property API allows to gather device resources from different sources,
such as ACPI. Convert the drivers to unleash the power of device property API.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
2020-01-13 21:53:39 +00:00

113 lines
2.6 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* STMicroelectronics magnetometers driver
*
* Copyright 2012-2013 STMicroelectronics Inc.
*
* Denis Ciocca <denis.ciocca@st.com>
*/
#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"
/*
* For new single-chip sensors use <device_name> as compatible string.
* For old single-chip devices keep <device_name>-magn to maintain
* compatibility
* For multi-chip devices, use <device_name>-magn to distinguish which
* capability is being used
*/
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,
},
{
.compatible = "st,lsm9ds1-magn",
.data = LSM9DS1_MAGN_DEV_NAME,
},
{}
};
MODULE_DEVICE_TABLE(of, st_magn_of_match);
static int st_magn_spi_probe(struct spi_device *spi)
{
const struct st_sensor_settings *settings;
struct st_sensor_data *mdata;
struct iio_dev *indio_dev;
int err;
st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
settings = st_magn_get_settings(spi->modalias);
if (!settings) {
dev_err(&spi->dev, "device name %s not recognized.\n",
spi->modalias);
return -ENODEV;
}
indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata));
if (!indio_dev)
return -ENOMEM;
mdata = iio_priv(indio_dev);
mdata->sensor_settings = (struct st_sensor_settings *)settings;
err = st_sensors_spi_configure(indio_dev, spi);
if (err < 0)
return err;
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 },
{ LSM9DS1_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 = 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");