1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * STMicroelectronics magnetometers driver 4 * 5 * Copyright 2012-2013 STMicroelectronics Inc. 6 * 7 * Denis Ciocca <denis.ciocca@st.com> 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/mod_devicetable.h> 13 #include <linux/spi/spi.h> 14 #include <linux/iio/iio.h> 15 16 #include <linux/iio/common/st_sensors.h> 17 #include <linux/iio/common/st_sensors_spi.h> 18 #include "st_magn.h" 19 20 /* 21 * For new single-chip sensors use <device_name> as compatible string. 22 * For old single-chip devices keep <device_name>-magn to maintain 23 * compatibility 24 * For multi-chip devices, use <device_name>-magn to distinguish which 25 * capability is being used 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 .compatible = "st,lsm9ds1-magn", 42 .data = LSM9DS1_MAGN_DEV_NAME, 43 }, 44 { 45 .compatible = "st,iis2mdc", 46 .data = IIS2MDC_MAGN_DEV_NAME, 47 }, 48 {} 49 }; 50 MODULE_DEVICE_TABLE(of, st_magn_of_match); 51 52 static int st_magn_spi_probe(struct spi_device *spi) 53 { 54 const struct st_sensor_settings *settings; 55 struct st_sensor_data *mdata; 56 struct iio_dev *indio_dev; 57 int err; 58 59 st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias)); 60 61 settings = st_magn_get_settings(spi->modalias); 62 if (!settings) { 63 dev_err(&spi->dev, "device name %s not recognized.\n", 64 spi->modalias); 65 return -ENODEV; 66 } 67 68 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*mdata)); 69 if (!indio_dev) 70 return -ENOMEM; 71 72 mdata = iio_priv(indio_dev); 73 mdata->sensor_settings = (struct st_sensor_settings *)settings; 74 75 err = st_sensors_spi_configure(indio_dev, spi); 76 if (err < 0) 77 return err; 78 79 err = st_sensors_power_enable(indio_dev); 80 if (err) 81 return err; 82 83 err = st_magn_common_probe(indio_dev); 84 if (err < 0) 85 goto st_magn_power_off; 86 87 return 0; 88 89 st_magn_power_off: 90 st_sensors_power_disable(indio_dev); 91 92 return err; 93 } 94 95 static int st_magn_spi_remove(struct spi_device *spi) 96 { 97 struct iio_dev *indio_dev = spi_get_drvdata(spi); 98 99 st_sensors_power_disable(indio_dev); 100 101 st_magn_common_remove(indio_dev); 102 103 return 0; 104 } 105 106 static const struct spi_device_id st_magn_id_table[] = { 107 { LIS3MDL_MAGN_DEV_NAME }, 108 { LSM303AGR_MAGN_DEV_NAME }, 109 { LIS2MDL_MAGN_DEV_NAME }, 110 { LSM9DS1_MAGN_DEV_NAME }, 111 { IIS2MDC_MAGN_DEV_NAME }, 112 {}, 113 }; 114 MODULE_DEVICE_TABLE(spi, st_magn_id_table); 115 116 static struct spi_driver st_magn_driver = { 117 .driver = { 118 .name = "st-magn-spi", 119 .of_match_table = st_magn_of_match, 120 }, 121 .probe = st_magn_spi_probe, 122 .remove = st_magn_spi_remove, 123 .id_table = st_magn_id_table, 124 }; 125 module_spi_driver(st_magn_driver); 126 127 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>"); 128 MODULE_DESCRIPTION("STMicroelectronics magnetometers spi driver"); 129 MODULE_LICENSE("GPL v2"); 130