1 /* 2 * STMicroelectronics magnetometers driver 3 * 4 * Copyright 2012-2013 STMicroelectronics Inc. 5 * 6 * Denis Ciocca <denis.ciocca@st.com> 7 * 8 * Licensed under the GPL-2. 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/slab.h> 14 #include <linux/spi/spi.h> 15 #include <linux/iio/iio.h> 16 17 #include <linux/iio/common/st_sensors.h> 18 #include <linux/iio/common/st_sensors_spi.h> 19 #include "st_magn.h" 20 21 #ifdef CONFIG_OF 22 /* 23 * For new single-chip sensors use <device_name> as compatible string. 24 * For old single-chip devices keep <device_name>-magn to maintain 25 * compatibility 26 */ 27 static const struct of_device_id st_magn_of_match[] = { 28 { 29 .compatible = "st,lis3mdl-magn", 30 .data = LIS3MDL_MAGN_DEV_NAME, 31 }, 32 { 33 .compatible = "st,lsm303agr-magn", 34 .data = LSM303AGR_MAGN_DEV_NAME, 35 }, 36 { 37 .compatible = "st,lis2mdl", 38 .data = LIS2MDL_MAGN_DEV_NAME, 39 }, 40 {} 41 }; 42 MODULE_DEVICE_TABLE(of, st_magn_of_match); 43 #else 44 #define st_magn_of_match NULL 45 #endif 46 47 static int st_magn_spi_probe(struct spi_device *spi) 48 { 49 struct iio_dev *indio_dev; 50 struct st_sensor_data *mdata; 51 int err; 52 53 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata)); 54 if (!indio_dev) 55 return -ENOMEM; 56 57 mdata = iio_priv(indio_dev); 58 59 st_sensors_of_name_probe(&spi->dev, st_magn_of_match, 60 spi->modalias, sizeof(spi->modalias)); 61 st_sensors_spi_configure(indio_dev, spi, mdata); 62 63 err = st_magn_common_probe(indio_dev); 64 if (err < 0) 65 return err; 66 67 return 0; 68 } 69 70 static int st_magn_spi_remove(struct spi_device *spi) 71 { 72 struct iio_dev *indio_dev = spi_get_drvdata(spi); 73 st_magn_common_remove(indio_dev); 74 75 return 0; 76 } 77 78 static const struct spi_device_id st_magn_id_table[] = { 79 { LIS3MDL_MAGN_DEV_NAME }, 80 { LSM303AGR_MAGN_DEV_NAME }, 81 { LIS2MDL_MAGN_DEV_NAME }, 82 {}, 83 }; 84 MODULE_DEVICE_TABLE(spi, st_magn_id_table); 85 86 static struct spi_driver st_magn_driver = { 87 .driver = { 88 .name = "st-magn-spi", 89 .of_match_table = of_match_ptr(st_magn_of_match), 90 }, 91 .probe = st_magn_spi_probe, 92 .remove = st_magn_spi_remove, 93 .id_table = st_magn_id_table, 94 }; 95 module_spi_driver(st_magn_driver); 96 97 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); 98 MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver"); 99 MODULE_LICENSE("GPL v2"); 100