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_sensors_i2c.c (1727B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * STMicroelectronics sensors i2c library driver
      4 *
      5 * Copyright 2012-2013 STMicroelectronics Inc.
      6 *
      7 * Denis Ciocca <denis.ciocca@st.com>
      8 */
      9
     10#include <linux/i2c.h>
     11#include <linux/kernel.h>
     12#include <linux/module.h>
     13#include <linux/iio/iio.h>
     14#include <linux/regmap.h>
     15
     16#include <linux/iio/common/st_sensors_i2c.h>
     17
     18#define ST_SENSORS_I2C_MULTIREAD	0x80
     19
     20static const struct regmap_config st_sensors_i2c_regmap_config = {
     21	.reg_bits = 8,
     22	.val_bits = 8,
     23};
     24
     25static const struct regmap_config st_sensors_i2c_regmap_multiread_bit_config = {
     26	.reg_bits = 8,
     27	.val_bits = 8,
     28	.read_flag_mask = ST_SENSORS_I2C_MULTIREAD,
     29};
     30
     31/*
     32 * st_sensors_i2c_configure() - configure I2C interface
     33 * @indio_dev: IIO device reference.
     34 * @client: i2c client reference.
     35 *
     36 * Return: 0 on success, else a negative error code.
     37 */
     38int st_sensors_i2c_configure(struct iio_dev *indio_dev,
     39			     struct i2c_client *client)
     40{
     41	struct st_sensor_data *sdata = iio_priv(indio_dev);
     42	const struct regmap_config *config;
     43
     44	if (sdata->sensor_settings->multi_read_bit)
     45		config = &st_sensors_i2c_regmap_multiread_bit_config;
     46	else
     47		config = &st_sensors_i2c_regmap_config;
     48
     49	sdata->regmap = devm_regmap_init_i2c(client, config);
     50	if (IS_ERR(sdata->regmap)) {
     51		dev_err(&client->dev, "Failed to register i2c regmap (%ld)\n",
     52			PTR_ERR(sdata->regmap));
     53		return PTR_ERR(sdata->regmap);
     54	}
     55
     56	i2c_set_clientdata(client, indio_dev);
     57
     58	indio_dev->name = client->name;
     59
     60	sdata->irq = client->irq;
     61
     62	return 0;
     63}
     64EXPORT_SYMBOL_NS(st_sensors_i2c_configure, IIO_ST_SENSORS);
     65
     66MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
     67MODULE_DESCRIPTION("STMicroelectronics ST-sensors i2c driver");
     68MODULE_LICENSE("GPL v2");