drivers/iio/accel/st_accel_spi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * STMicroelectronics accelerometers 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/slab.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_accel.h"
  19
  20 /*
  21  * For new single-chip sensors use <device_name> as compatible string.
  22  * For old single-chip devices keep <device_name>-accel to maintain
  23  * compatibility
  24  */
  25 static const struct of_device_id st_accel_of_match[] = {
  26         {
  27                 /* An older compatible */
  28                 .compatible = "st,lis302dl-spi",
  29                 .data = LIS3LV02DL_ACCEL_DEV_NAME,
  30         },
  31         {
  32                 .compatible = "st,lis3lv02dl-accel",
  33                 .data = LIS3LV02DL_ACCEL_DEV_NAME,
  34         },
  35         {
  36                 .compatible = "st,lis3dh-accel",
  37                 .data = LIS3DH_ACCEL_DEV_NAME,
  38         },
  39         {
  40                 .compatible = "st,lsm330d-accel",
  41                 .data = LSM330D_ACCEL_DEV_NAME,
  42         },
  43         {
  44                 .compatible = "st,lsm330dl-accel",
  45                 .data = LSM330DL_ACCEL_DEV_NAME,
  46         },
  47         {
  48                 .compatible = "st,lsm330dlc-accel",
  49                 .data = LSM330DLC_ACCEL_DEV_NAME,
  50         },
  51         {
  52                 .compatible = "st,lis331dlh-accel",
  53                 .data = LIS331DLH_ACCEL_DEV_NAME,
  54         },
  55         {
  56                 .compatible = "st,lsm330-accel",
  57                 .data = LSM330_ACCEL_DEV_NAME,
  58         },
  59         {
  60                 .compatible = "st,lsm303agr-accel",
  61                 .data = LSM303AGR_ACCEL_DEV_NAME,
  62         },
  63         {
  64                 .compatible = "st,lis2dh12-accel",
  65                 .data = LIS2DH12_ACCEL_DEV_NAME,
  66         },
  67         {
  68                 .compatible = "st,lis3l02dq",
  69                 .data = LIS3L02DQ_ACCEL_DEV_NAME,
  70         },
  71         {
  72                 .compatible = "st,lng2dm-accel",
  73                 .data = LNG2DM_ACCEL_DEV_NAME,
  74         },
  75         {
  76                 .compatible = "st,h3lis331dl-accel",
  77                 .data = H3LIS331DL_ACCEL_DEV_NAME,
  78         },
  79         {
  80                 .compatible = "st,lis331dl-accel",
  81                 .data = LIS331DL_ACCEL_DEV_NAME,
  82         },
  83         {
  84                 .compatible = "st,lis2dw12",
  85                 .data = LIS2DW12_ACCEL_DEV_NAME,
  86         },
  87         {
  88                 .compatible = "st,lis3dhh",
  89                 .data = LIS3DHH_ACCEL_DEV_NAME,
  90         },
  91         {
  92                 .compatible = "st,lis3de",
  93                 .data = LIS3DE_ACCEL_DEV_NAME,
  94         },
  95         {}
  96 };
  97 MODULE_DEVICE_TABLE(of, st_accel_of_match);
  98
  99 static int st_accel_spi_probe(struct spi_device *spi)
 100 {
 101         const struct st_sensor_settings *settings;
 102         struct st_sensor_data *adata;
 103         struct iio_dev *indio_dev;
 104         int err;
 105
 106         st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
 107
 108         settings = st_accel_get_settings(spi->modalias);
 109         if (!settings) {
 110                 dev_err(&spi->dev, "device name %s not recognized.\n",
 111                         spi->modalias);
 112                 return -ENODEV;
 113         }
 114
 115         indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*adata));
 116         if (!indio_dev)
 117                 return -ENOMEM;
 118
 119         adata = iio_priv(indio_dev);
 120         adata->sensor_settings = (struct st_sensor_settings *)settings;
 121
 122         err = st_sensors_spi_configure(indio_dev, spi);
 123         if (err < 0)
 124                 return err;
 125
 126         err = st_sensors_power_enable(indio_dev);
 127         if (err)
 128                 return err;
 129
 130         err = st_accel_common_probe(indio_dev);
 131         if (err < 0)
 132                 goto st_accel_power_off;
 133
 134         return 0;
 135
 136 st_accel_power_off:
 137         st_sensors_power_disable(indio_dev);
 138
 139         return err;
 140 }
 141
 142 static int st_accel_spi_remove(struct spi_device *spi)
 143 {
 144         struct iio_dev *indio_dev = spi_get_drvdata(spi);
 145
 146         st_accel_common_remove(indio_dev);
 147
 148         st_sensors_power_disable(indio_dev);
 149
 150         return 0;
 151 }
 152
 153 static const struct spi_device_id st_accel_id_table[] = {
 154         { LIS3DH_ACCEL_DEV_NAME },
 155         { LSM330D_ACCEL_DEV_NAME },
 156         { LSM330DL_ACCEL_DEV_NAME },
 157         { LSM330DLC_ACCEL_DEV_NAME },
 158         { LIS331DLH_ACCEL_DEV_NAME },
 159         { LSM330_ACCEL_DEV_NAME },
 160         { LSM303AGR_ACCEL_DEV_NAME },
 161         { LIS2DH12_ACCEL_DEV_NAME },
 162         { LIS3L02DQ_ACCEL_DEV_NAME },
 163         { LNG2DM_ACCEL_DEV_NAME },
 164         { H3LIS331DL_ACCEL_DEV_NAME },
 165         { LIS331DL_ACCEL_DEV_NAME },
 166         { LIS3LV02DL_ACCEL_DEV_NAME },
 167         { LIS2DW12_ACCEL_DEV_NAME },
 168         { LIS3DHH_ACCEL_DEV_NAME },
 169         { LIS3DE_ACCEL_DEV_NAME },
 170         {},
 171 };
 172 MODULE_DEVICE_TABLE(spi, st_accel_id_table);
 173
 174 static struct spi_driver st_accel_driver = {
 175         .driver = {
 176                 .name = "st-accel-spi",
 177                 .of_match_table = st_accel_of_match,
 178         },
 179         .probe = st_accel_spi_probe,
 180         .remove = st_accel_spi_remove,
 181         .id_table = st_accel_id_table,
 182 };
 183 module_spi_driver(st_accel_driver);
 184
 185 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 186 MODULE_DESCRIPTION("STMicroelectronics accelerometers spi driver");
 187 MODULE_LICENSE("GPL v2");