1872e79adSDenis Ciocca /* 2872e79adSDenis Ciocca * STMicroelectronics magnetometers driver 3872e79adSDenis Ciocca * 4872e79adSDenis Ciocca * Copyright 2012-2013 STMicroelectronics Inc. 5872e79adSDenis Ciocca * 6872e79adSDenis Ciocca * Denis Ciocca <denis.ciocca@st.com> 7872e79adSDenis Ciocca * 8872e79adSDenis Ciocca * Licensed under the GPL-2. 9872e79adSDenis Ciocca */ 10872e79adSDenis Ciocca 11872e79adSDenis Ciocca #include <linux/kernel.h> 12872e79adSDenis Ciocca #include <linux/module.h> 13872e79adSDenis Ciocca #include <linux/slab.h> 14872e79adSDenis Ciocca #include <linux/spi/spi.h> 15872e79adSDenis Ciocca #include <linux/iio/iio.h> 16872e79adSDenis Ciocca 17872e79adSDenis Ciocca #include <linux/iio/common/st_sensors.h> 18872e79adSDenis Ciocca #include <linux/iio/common/st_sensors_spi.h> 19872e79adSDenis Ciocca #include "st_magn.h" 20872e79adSDenis Ciocca 2165a687a2SLorenzo Bianconi #ifdef CONFIG_OF 2265a687a2SLorenzo Bianconi /* 2365a687a2SLorenzo Bianconi * For new single-chip sensors use <device_name> as compatible string. 2465a687a2SLorenzo Bianconi * For old single-chip devices keep <device_name>-magn to maintain 2565a687a2SLorenzo Bianconi * compatibility 2665a687a2SLorenzo Bianconi */ 2765a687a2SLorenzo Bianconi static const struct of_device_id st_magn_of_match[] = { 2865a687a2SLorenzo Bianconi { 2965a687a2SLorenzo Bianconi .compatible = "st,lis3mdl-magn", 3065a687a2SLorenzo Bianconi .data = LIS3MDL_MAGN_DEV_NAME, 3165a687a2SLorenzo Bianconi }, 3265a687a2SLorenzo Bianconi { 3365a687a2SLorenzo Bianconi .compatible = "st,lsm303agr-magn", 3465a687a2SLorenzo Bianconi .data = LSM303AGR_MAGN_DEV_NAME, 3565a687a2SLorenzo Bianconi }, 36*d0b7fea5SLorenzo Bianconi { 37*d0b7fea5SLorenzo Bianconi .compatible = "st,lis2mdl", 38*d0b7fea5SLorenzo Bianconi .data = LIS2MDL_MAGN_DEV_NAME, 39*d0b7fea5SLorenzo Bianconi }, 4065a687a2SLorenzo Bianconi {} 4165a687a2SLorenzo Bianconi }; 4265a687a2SLorenzo Bianconi MODULE_DEVICE_TABLE(of, st_magn_of_match); 4365a687a2SLorenzo Bianconi #else 4465a687a2SLorenzo Bianconi #define st_magn_of_match NULL 4565a687a2SLorenzo Bianconi #endif 4665a687a2SLorenzo Bianconi 47872e79adSDenis Ciocca static int st_magn_spi_probe(struct spi_device *spi) 48872e79adSDenis Ciocca { 49872e79adSDenis Ciocca struct iio_dev *indio_dev; 50872e79adSDenis Ciocca struct st_sensor_data *mdata; 51872e79adSDenis Ciocca int err; 52872e79adSDenis Ciocca 537fc5ad7eSSachin Kamat indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata)); 547fc5ad7eSSachin Kamat if (!indio_dev) 557fc5ad7eSSachin Kamat return -ENOMEM; 56872e79adSDenis Ciocca 57872e79adSDenis Ciocca mdata = iio_priv(indio_dev); 58872e79adSDenis Ciocca 5965a687a2SLorenzo Bianconi st_sensors_of_name_probe(&spi->dev, st_magn_of_match, 6065a687a2SLorenzo Bianconi spi->modalias, sizeof(spi->modalias)); 61872e79adSDenis Ciocca st_sensors_spi_configure(indio_dev, spi, mdata); 62872e79adSDenis Ciocca 632109eb4cSDenis CIOCCA err = st_magn_common_probe(indio_dev); 64872e79adSDenis Ciocca if (err < 0) 657fc5ad7eSSachin Kamat return err; 66872e79adSDenis Ciocca 67872e79adSDenis Ciocca return 0; 68872e79adSDenis Ciocca } 69872e79adSDenis Ciocca 70872e79adSDenis Ciocca static int st_magn_spi_remove(struct spi_device *spi) 71872e79adSDenis Ciocca { 72872e79adSDenis Ciocca struct iio_dev *indio_dev = spi_get_drvdata(spi); 73872e79adSDenis Ciocca st_magn_common_remove(indio_dev); 74872e79adSDenis Ciocca 75872e79adSDenis Ciocca return 0; 76872e79adSDenis Ciocca } 77872e79adSDenis Ciocca 78872e79adSDenis Ciocca static const struct spi_device_id st_magn_id_table[] = { 79872e79adSDenis Ciocca { LIS3MDL_MAGN_DEV_NAME }, 801e9676a8SGiuseppe Barba { LSM303AGR_MAGN_DEV_NAME }, 81*d0b7fea5SLorenzo Bianconi { LIS2MDL_MAGN_DEV_NAME }, 82872e79adSDenis Ciocca {}, 83872e79adSDenis Ciocca }; 84872e79adSDenis Ciocca MODULE_DEVICE_TABLE(spi, st_magn_id_table); 85872e79adSDenis Ciocca 86872e79adSDenis Ciocca static struct spi_driver st_magn_driver = { 87872e79adSDenis Ciocca .driver = { 88872e79adSDenis Ciocca .name = "st-magn-spi", 8965a687a2SLorenzo Bianconi .of_match_table = of_match_ptr(st_magn_of_match), 90872e79adSDenis Ciocca }, 91872e79adSDenis Ciocca .probe = st_magn_spi_probe, 92872e79adSDenis Ciocca .remove = st_magn_spi_remove, 93872e79adSDenis Ciocca .id_table = st_magn_id_table, 94872e79adSDenis Ciocca }; 95872e79adSDenis Ciocca module_spi_driver(st_magn_driver); 96872e79adSDenis Ciocca 97872e79adSDenis Ciocca MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); 98872e79adSDenis Ciocca MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver"); 99872e79adSDenis Ciocca MODULE_LICENSE("GPL v2"); 100