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/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_pressure.h"
  19
  20/*
  21 * For new single-chip sensors use <device_name> as compatible string.
  22 * For old single-chip devices keep <device_name>-press to maintain
  23 * compatibility
  24 */
  25static const struct of_device_id st_press_of_match[] = {
  26        {
  27                .compatible = "st,lps001wp-press",
  28                .data = LPS001WP_PRESS_DEV_NAME,
  29        },
  30        {
  31                .compatible = "st,lps25h-press",
  32                .data = LPS25H_PRESS_DEV_NAME,
  33        },
  34        {
  35                .compatible = "st,lps331ap-press",
  36                .data = LPS331AP_PRESS_DEV_NAME,
  37        },
  38        {
  39                .compatible = "st,lps22hb-press",
  40                .data = LPS22HB_PRESS_DEV_NAME,
  41        },
  42        {
  43                .compatible = "st,lps33hw",
  44                .data = LPS33HW_PRESS_DEV_NAME,
  45        },
  46        {
  47                .compatible = "st,lps35hw",
  48                .data = LPS35HW_PRESS_DEV_NAME,
  49        },
  50        {
  51                .compatible = "st,lps22hh",
  52                .data = LPS22HH_PRESS_DEV_NAME,
  53        },
  54        {},
  55};
  56MODULE_DEVICE_TABLE(of, st_press_of_match);
  57
  58static int st_press_spi_probe(struct spi_device *spi)
  59{
  60        const struct st_sensor_settings *settings;
  61        struct st_sensor_data *press_data;
  62        struct iio_dev *indio_dev;
  63        int err;
  64
  65        st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));
  66
  67        settings = st_press_get_settings(spi->modalias);
  68        if (!settings) {
  69                dev_err(&spi->dev, "device name %s not recognized.\n",
  70                        spi->modalias);
  71                return -ENODEV;
  72        }
  73
  74        indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
  75        if (!indio_dev)
  76                return -ENOMEM;
  77
  78        press_data = iio_priv(indio_dev);
  79        press_data->sensor_settings = (struct st_sensor_settings *)settings;
  80
  81        err = st_sensors_spi_configure(indio_dev, spi);
  82        if (err < 0)
  83                return err;
  84
  85        err = st_sensors_power_enable(indio_dev);
  86        if (err)
  87                return err;
  88
  89        err = st_press_common_probe(indio_dev);
  90        if (err < 0)
  91                goto st_press_power_off;
  92
  93        return 0;
  94
  95st_press_power_off:
  96        st_sensors_power_disable(indio_dev);
  97
  98        return err;
  99}
 100
 101static int st_press_spi_remove(struct spi_device *spi)
 102{
 103        struct iio_dev *indio_dev = spi_get_drvdata(spi);
 104
 105        st_sensors_power_disable(indio_dev);
 106
 107        st_press_common_remove(indio_dev);
 108
 109        return 0;
 110}
 111
 112static const struct spi_device_id st_press_id_table[] = {
 113        { LPS001WP_PRESS_DEV_NAME },
 114        { LPS25H_PRESS_DEV_NAME },
 115        { LPS331AP_PRESS_DEV_NAME },
 116        { LPS22HB_PRESS_DEV_NAME },
 117        { LPS33HW_PRESS_DEV_NAME },
 118        { LPS35HW_PRESS_DEV_NAME },
 119        { LPS22HH_PRESS_DEV_NAME },
 120        {},
 121};
 122MODULE_DEVICE_TABLE(spi, st_press_id_table);
 123
 124static struct spi_driver st_press_driver = {
 125        .driver = {
 126                .name = "st-press-spi",
 127                .of_match_table = st_press_of_match,
 128        },
 129        .probe = st_press_spi_probe,
 130        .remove = st_press_spi_remove,
 131        .id_table = st_press_id_table,
 132};
 133module_spi_driver(st_press_driver);
 134
 135MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 136MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
 137MODULE_LICENSE("GPL v2");
 138