Quelle  st_pressure_i2c.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/i2c.h>
#include <linux/iio/iio.h>

#include <linux/iio/common/st_sensors.h>
#include <linux/iio/common/st_sensors_i2c.h>
#include "st_pressure.h"

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 const struct acpi_device_id st_press_acpi_match[] = {
 {"SNO9210", LPS22HB},
 { }
};
MODULE_DEVICE_TABLE(acpi, st_press_acpi_match);

static const struct i2c_device_id st_press_id_table[] = {
 { LPS001WP_PRESS_DEV_NAME, LPS001WP },
 { LPS25H_PRESS_DEV_NAME,  LPS25H },
 { LPS331AP_PRESS_DEV_NAME, LPS331AP },
 { LPS22HB_PRESS_DEV_NAME, LPS22HB },
 { LPS33HW_PRESS_DEV_NAME, LPS33HW },
 { LPS35HW_PRESS_DEV_NAME, LPS35HW },
 { LPS22HH_PRESS_DEV_NAME, LPS22HH },
 { LPS22DF_PRESS_DEV_NAME, LPS22DF },
 { }
};
MODULE_DEVICE_TABLE(i2c, st_press_id_table);

static int st_press_i2c_probe(struct i2c_client *client)
{
 const struct st_sensor_settings *settings;
 struct st_sensor_data *press_data;
 struct iio_dev *indio_dev;
 int ret;

 st_sensors_dev_name_probe(&client->dev, client->name, sizeof(client->name));

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

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

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

 ret = st_sensors_i2c_configure(indio_dev, client);
 if (ret < 0)
  return ret;

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

 return st_press_common_probe(indio_dev);
}

static struct i2c_driver st_press_driver = {
 .driver = {
  .name = "st-press-i2c",
  .of_match_table = st_press_of_match,
  .acpi_match_table = st_press_acpi_match,
 },
 .probe = st_press_i2c_probe,
 .id_table = st_press_id_table,
};
module_i2c_driver(st_press_driver);

MODULE_AUTHOR("Denis Ciocca ");
MODULE_DESCRIPTION("STMicroelectronics pressures i2c driver");
MODULE_LICENSE("GPL v2");
MODULE_IMPORT_NS("IIO_ST_SENSORS");