diff options
Diffstat (limited to 'drivers/iio/magnetometer/st_magn_spi.c')
-rw-r--r-- | drivers/iio/magnetometer/st_magn_spi.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/drivers/iio/magnetometer/st_magn_spi.c b/drivers/iio/magnetometer/st_magn_spi.c new file mode 100644 index 0000000000..f203e1f87e --- /dev/null +++ b/drivers/iio/magnetometer/st_magn_spi.c @@ -0,0 +1,114 @@ +// 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/mod_devicetable.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, + }, + { + .compatible = "st,iis2mdc", + .data = IIS2MDC_MAGN_DEV_NAME, + }, + { + .compatible = "st,lsm303c-magn", + .data = LSM303C_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_sensors_power_enable(indio_dev); + if (err) + return err; + + return st_magn_common_probe(indio_dev); +} + +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 }, + { IIS2MDC_MAGN_DEV_NAME }, + { LSM303C_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, + .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"); +MODULE_IMPORT_NS(IIO_ST_SENSORS); |