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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adxl372_i2c.c (1690B)

      1// SPDX-License-Identifier: GPL-2.0+
      2/*
      3 * ADXL372 3-Axis Digital Accelerometer I2C driver
      4 *
      5 * Copyright 2018 Analog Devices Inc.
      6 */
      7
      8#include <linux/i2c.h>
      9#include <linux/mod_devicetable.h>
     10#include <linux/module.h>
     11#include <linux/regmap.h>
     12
     13#include "adxl372.h"
     14
     15static const struct regmap_config adxl372_regmap_config = {
     16	.reg_bits = 8,
     17	.val_bits = 8,
     18	.readable_noinc_reg = adxl372_readable_noinc_reg,
     19};
     20
     21static int adxl372_i2c_probe(struct i2c_client *client,
     22			     const struct i2c_device_id *id)
     23{
     24	struct regmap *regmap;
     25	unsigned int regval;
     26	int ret;
     27
     28	regmap = devm_regmap_init_i2c(client, &adxl372_regmap_config);
     29	if (IS_ERR(regmap))
     30		return PTR_ERR(regmap);
     31
     32	ret = regmap_read(regmap, ADXL372_REVID, &regval);
     33	if (ret < 0)
     34		return ret;
     35
     36	/* Starting with the 3rd revision an I2C chip bug was fixed */
     37	if (regval < 3)
     38		dev_warn(&client->dev,
     39		"I2C might not work properly with other devices on the bus");
     40
     41	return adxl372_probe(&client->dev, regmap, client->irq, id->name);
     42}
     43
     44static const struct i2c_device_id adxl372_i2c_id[] = {
     45	{ "adxl372", 0 },
     46	{}
     47};
     48MODULE_DEVICE_TABLE(i2c, adxl372_i2c_id);
     49
     50static const struct of_device_id adxl372_of_match[] = {
     51	{ .compatible = "adi,adxl372" },
     52	{ }
     53};
     54MODULE_DEVICE_TABLE(of, adxl372_of_match);
     55
     56static struct i2c_driver adxl372_i2c_driver = {
     57	.driver = {
     58		.name = "adxl372_i2c",
     59		.of_match_table = adxl372_of_match,
     60	},
     61	.probe = adxl372_i2c_probe,
     62	.id_table = adxl372_i2c_id,
     63};
     64
     65module_i2c_driver(adxl372_i2c_driver);
     66
     67MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
     68MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer I2C driver");
     69MODULE_LICENSE("GPL");
     70MODULE_IMPORT_NS(IIO_ADXL372);