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 * For multi-chip devices, use <device_name>-magn to distinguish which 27 * capability is being used 28 */ 29 static const struct of_device_id st_magn_of_match[] = { 30 { 31 .compatible = "st,lis3mdl-magn", 32 .data = LIS3MDL_MAGN_DEV_NAME, 33 }, 34 { 35 .compatible = "st,lsm303agr-magn", 36 .data = LSM303AGR_MAGN_DEV_NAME, 37 }, 38 { 39 .compatible = "st,lis2mdl", 40 .data = LIS2MDL_MAGN_DEV_NAME, 41 }, 42 { 43 .compatible = "st,lsm9ds1-magn", 44 .data = LSM9DS1_MAGN_DEV_NAME, 45 }, 46 {} 47 }; 48 MODULE_DEVICE_TABLE(of, st_magn_of_match); 49 #else 50 #define st_magn_of_match NULL 51 #endif 52 53 static int st_magn_spi_probe(struct spi_device *spi) 54 { 55 struct iio_dev *indio_dev; 56 struct st_sensor_data *mdata; 57 int err; 58 59 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata)); 60 if (!indio_dev) 61 return -ENOMEM; 62 63 mdata = iio_priv(indio_dev); 64 65 st_sensors_of_name_probe(&spi->dev, st_magn_of_match, 66 spi->modalias, sizeof(spi->modalias)); 67 st_sensors_spi_configure(indio_dev, spi, mdata); 68 69 err = st_magn_common_probe(indio_dev); 70 if (err < 0) 71 return err; 72 73 return 0; 74 } 75 76 static int st_magn_spi_remove(struct spi_device *spi) 77 { 78 struct iio_dev *indio_dev = spi_get_drvdata(spi); 79 st_magn_common_remove(indio_dev); 80 81 return 0; 82 } 83 84 static const struct spi_device_id st_magn_id_table[] = { 85 { LIS3MDL_MAGN_DEV_NAME }, 86 { LSM303AGR_MAGN_DEV_NAME }, 87 { LIS2MDL_MAGN_DEV_NAME }, 88 { LSM9DS1_MAGN_DEV_NAME }, 89 {}, 90 }; 91 MODULE_DEVICE_TABLE(spi, st_magn_id_table); 92 93 static struct spi_driver st_magn_driver = { 94 .driver = { 95 .name = "st-magn-spi", 96 .of_match_table = of_match_ptr(st_magn_of_match), 97 }, 98 .probe = st_magn_spi_probe, 99 .remove = st_magn_spi_remove, 100 .id_table = st_magn_id_table, 101 }; 102 module_spi_driver(st_magn_driver); 103 104 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); 105 MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver"); 106 MODULE_LICENSE("GPL v2"); 107