LXR linux/drivers/iio/pressure/st_pressure

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * STMicroelectronics pressures driver
   4 *
   5 * Copyright 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_pressure.h"
  19
  20#ifdef CONFIG_OF
  21/*
  22 * For new single-chip sensors use <device_name> as compatible string.
  23 * For old single-chip devices keep <device_name>-press to maintain
  24 * compatibility
  25 */
  26static const struct of_device_id st_press_of_match[] = {
  27        {
  28                .compatible = "st,lps001wp-press",
  29                .data = LPS001WP_PRESS_DEV_NAME,
  30        },
  31        {
  32                .compatible = "st,lps25h-press",
  33                .data = LPS25H_PRESS_DEV_NAME,
  34        },
  35        {
  36                .compatible = "st,lps331ap-press",
  37                .data = LPS331AP_PRESS_DEV_NAME,
  38        },
  39        {
  40                .compatible = "st,lps22hb-press",
  41                .data = LPS22HB_PRESS_DEV_NAME,
  42        },
  43        {
  44                .compatible = "st,lps33hw",
  45                .data = LPS33HW_PRESS_DEV_NAME,
  46        },
  47        {
  48                .compatible = "st,lps35hw",
  49                .data = LPS35HW_PRESS_DEV_NAME,
  50        },
  51        {
  52                .compatible = "st,lps22hh",
  53                .data = LPS22HH_PRESS_DEV_NAME,
  54        },
  55        {},
  56};
  57MODULE_DEVICE_TABLE(of, st_press_of_match);
  58#else
  59#define st_press_of_match       NULL
  60#endif
  61
  62static int st_press_spi_probe(struct spi_device *spi)
  63{
  64        const struct st_sensor_settings *settings;
  65        struct st_sensor_data *press_data;
  66        struct iio_dev *indio_dev;
  67        int err;
  68
  69        st_sensors_of_name_probe(&spi->dev, st_press_of_match,
  70                                 spi->modalias, sizeof(spi->modalias));
  71
  72        settings = st_press_get_settings(spi->modalias);
  73        if (!settings) {
  74                dev_err(&spi->dev, "device name %s not recognized.\n",
  75                        spi->modalias);
  76                return -ENODEV;
  77        }
  78
  79        indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
  80        if (!indio_dev)
  81                return -ENOMEM;
  82
  83        press_data = iio_priv(indio_dev);
  84        press_data->sensor_settings = (struct st_sensor_settings *)settings;
  85
  86        err = st_sensors_spi_configure(indio_dev, spi);
  87        if (err < 0)
  88                return err;
  89
  90        err = st_press_common_probe(indio_dev);
  91        if (err < 0)
  92                return err;
  93
  94        return 0;
  95}
  96
  97static int st_press_spi_remove(struct spi_device *spi)
  98{
  99        st_press_common_remove(spi_get_drvdata(spi));
 100
 101        return 0;
 102}
 103
 104static const struct spi_device_id st_press_id_table[] = {
 105        { LPS001WP_PRESS_DEV_NAME },
 106        { LPS25H_PRESS_DEV_NAME },
 107        { LPS331AP_PRESS_DEV_NAME },
 108        { LPS22HB_PRESS_DEV_NAME },
 109        { LPS33HW_PRESS_DEV_NAME },
 110        { LPS35HW_PRESS_DEV_NAME },
 111        { LPS22HH_PRESS_DEV_NAME },
 112        {},
 113};
 114MODULE_DEVICE_TABLE(spi, st_press_id_table);
 115
 116static struct spi_driver st_press_driver = {
 117        .driver = {
 118                .name = "st-press-spi",
 119                .of_match_table = of_match_ptr(st_press_of_match),
 120        },
 121        .probe = st_press_spi_probe,
 122        .remove = st_press_spi_remove,
 123        .id_table = st_press_id_table,
 124};
 125module_spi_driver(st_press_driver);
 126
 127MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 128MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
 129MODULE_LICENSE("GPL v2");
 130