cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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st_magn_i2c.c (2739B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * STMicroelectronics magnetometers 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/mod_devicetable.h>
     13#include <linux/i2c.h>
     14#include <linux/iio/iio.h>
     15
     16#include <linux/iio/common/st_sensors.h>
     17#include <linux/iio/common/st_sensors_i2c.h>
     18#include "st_magn.h"
     19
     20static const struct of_device_id st_magn_of_match[] = {
     21	{
     22		.compatible = "st,lsm303dlh-magn",
     23		.data = LSM303DLH_MAGN_DEV_NAME,
     24	},
     25	{
     26		.compatible = "st,lsm303dlhc-magn",
     27		.data = LSM303DLHC_MAGN_DEV_NAME,
     28	},
     29	{
     30		.compatible = "st,lsm303dlm-magn",
     31		.data = LSM303DLM_MAGN_DEV_NAME,
     32	},
     33	{
     34		.compatible = "st,lis3mdl-magn",
     35		.data = LIS3MDL_MAGN_DEV_NAME,
     36	},
     37	{
     38		.compatible = "st,lsm303agr-magn",
     39		.data = LSM303AGR_MAGN_DEV_NAME,
     40	},
     41	{
     42		.compatible = "st,lis2mdl",
     43		.data = LIS2MDL_MAGN_DEV_NAME,
     44	},
     45	{
     46		.compatible = "st,lsm9ds1-magn",
     47		.data = LSM9DS1_MAGN_DEV_NAME,
     48	},
     49	{
     50		.compatible = "st,iis2mdc",
     51		.data = IIS2MDC_MAGN_DEV_NAME,
     52	},
     53	{},
     54};
     55MODULE_DEVICE_TABLE(of, st_magn_of_match);
     56
     57static int st_magn_i2c_probe(struct i2c_client *client,
     58			     const struct i2c_device_id *id)
     59{
     60	const struct st_sensor_settings *settings;
     61	struct st_sensor_data *mdata;
     62	struct iio_dev *indio_dev;
     63	int err;
     64
     65	st_sensors_dev_name_probe(&client->dev, client->name, sizeof(client->name));
     66
     67	settings = st_magn_get_settings(client->name);
     68	if (!settings) {
     69		dev_err(&client->dev, "device name %s not recognized.\n",
     70			client->name);
     71		return -ENODEV;
     72	}
     73
     74	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
     75	if (!indio_dev)
     76		return -ENOMEM;
     77
     78	mdata = iio_priv(indio_dev);
     79	mdata->sensor_settings = (struct st_sensor_settings *)settings;
     80
     81	err = st_sensors_i2c_configure(indio_dev, client);
     82	if (err < 0)
     83		return err;
     84
     85	err = st_sensors_power_enable(indio_dev);
     86	if (err)
     87		return err;
     88
     89	return st_magn_common_probe(indio_dev);
     90}
     91
     92static const struct i2c_device_id st_magn_id_table[] = {
     93	{ LSM303DLH_MAGN_DEV_NAME },
     94	{ LSM303DLHC_MAGN_DEV_NAME },
     95	{ LSM303DLM_MAGN_DEV_NAME },
     96	{ LIS3MDL_MAGN_DEV_NAME },
     97	{ LSM303AGR_MAGN_DEV_NAME },
     98	{ LIS2MDL_MAGN_DEV_NAME },
     99	{ LSM9DS1_MAGN_DEV_NAME },
    100	{ IIS2MDC_MAGN_DEV_NAME },
    101	{},
    102};
    103MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
    104
    105static struct i2c_driver st_magn_driver = {
    106	.driver = {
    107		.name = "st-magn-i2c",
    108		.of_match_table = st_magn_of_match,
    109	},
    110	.probe = st_magn_i2c_probe,
    111	.id_table = st_magn_id_table,
    112};
    113module_i2c_driver(st_magn_driver);
    114
    115MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
    116MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
    117MODULE_LICENSE("GPL v2");
    118MODULE_IMPORT_NS(IIO_ST_SENSORS);