Quelle  st_pressure_spi.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-only
/*
 * STMicroelectronics pressures driver
 *
 * Copyright 2013 STMicroelectronics Inc.
 *
 * Denis Ciocca <denis.ciocca@st.com>
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/spi/spi.h>
#include <linux/iio/iio.h>

#include <linux/iio/common/st_sensors.h>
#include <linux/iio/common/st_sensors_spi.h>
#include "st_pressure.h"

/*
 * For new single-chip sensors use <device_name> as compatible string.
 * For old single-chip devices keep <device_name>-press to maintain
 * compatibility
 */
static const struct of_device_id st_press_of_match[] = {
 {
  .compatible = "st,lps001wp-press",
  .data = LPS001WP_PRESS_DEV_NAME,
 },
 {
  .compatible = "st,lps25h-press",
  .data = LPS25H_PRESS_DEV_NAME,
 },
 {
  .compatible = "st,lps331ap-press",
  .data = LPS331AP_PRESS_DEV_NAME,
 },
 {
  .compatible = "st,lps22hb-press",
  .data = LPS22HB_PRESS_DEV_NAME,
 },
 {
  .compatible = "st,lps33hw",
  .data = LPS33HW_PRESS_DEV_NAME,
 },
 {
  .compatible = "st,lps35hw",
  .data = LPS35HW_PRESS_DEV_NAME,
 },
 {
  .compatible = "st,lps22hh",
  .data = LPS22HH_PRESS_DEV_NAME,
 },
 {
  .compatible = "st,lps22df",
  .data = LPS22DF_PRESS_DEV_NAME,
 },
 { }
};
MODULE_DEVICE_TABLE(of, st_press_of_match);

static int st_press_spi_probe(struct spi_device *spi)
{
 const struct st_sensor_settings *settings;
 struct st_sensor_data *press_data;
 struct iio_dev *indio_dev;
 int err;

 st_sensors_dev_name_probe(&spi->dev, spi->modalias, sizeof(spi->modalias));

 settings = st_press_get_settings(spi->modalias);
 if (!settings) {
  dev_err(&spi->dev, "device name %s not recognized.\n",
   spi->modalias);
  return -ENODEV;
 }

 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*press_data));
 if (!indio_dev)
  return -ENOMEM;

 press_data = iio_priv(indio_dev);
 press_data->sensor_settings = (struct st_sensor_settings *)settings;

 err = st_sensors_spi_configure(indio_dev, spi);
 if (err < 0)
  return err;

 err = st_sensors_power_enable(indio_dev);
 if (err)
  return err;

 return st_press_common_probe(indio_dev);
}

static const struct spi_device_id st_press_id_table[] = {
 { LPS001WP_PRESS_DEV_NAME },
 { LPS25H_PRESS_DEV_NAME },
 { LPS331AP_PRESS_DEV_NAME },
 { LPS22HB_PRESS_DEV_NAME },
 { LPS33HW_PRESS_DEV_NAME },
 { LPS35HW_PRESS_DEV_NAME },
 { LPS22HH_PRESS_DEV_NAME },
 { LPS22DF_PRESS_DEV_NAME },
 { "lps001wp-press" },
 { "lps25h-press", },
 { "lps331ap-press" },
 { "lps22hb-press" },
 { }
};
MODULE_DEVICE_TABLE(spi, st_press_id_table);

static struct spi_driver st_press_driver = {
 .driver = {
  .name = "st-press-spi",
  .of_match_table = st_press_of_match,
 },
 .probe = st_press_spi_probe,
 .id_table = st_press_id_table,
};
module_spi_driver(st_press_driver);

MODULE_AUTHOR("Denis Ciocca ");
MODULE_DESCRIPTION("STMicroelectronics pressures spi driver");
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS("IIO_ST_SENSORS");