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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hmc5843_i2c.c (2875B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * i2c driver for hmc5843/5843/5883/5883l/5983
      4 *
      5 * Split from hmc5843.c
      6 * Copyright (C) Josef Gajdusek <atx@atx.name>
      7 */
      8
      9#include <linux/module.h>
     10#include <linux/i2c.h>
     11#include <linux/regmap.h>
     12#include <linux/iio/iio.h>
     13#include <linux/iio/triggered_buffer.h>
     14
     15#include "hmc5843.h"
     16
     17static const struct regmap_range hmc5843_readable_ranges[] = {
     18	regmap_reg_range(0, HMC5843_ID_END),
     19};
     20
     21static const struct regmap_access_table hmc5843_readable_table = {
     22	.yes_ranges = hmc5843_readable_ranges,
     23	.n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges),
     24};
     25
     26static const struct regmap_range hmc5843_writable_ranges[] = {
     27	regmap_reg_range(0, HMC5843_MODE_REG),
     28};
     29
     30static const struct regmap_access_table hmc5843_writable_table = {
     31	.yes_ranges = hmc5843_writable_ranges,
     32	.n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges),
     33};
     34
     35static const struct regmap_range hmc5843_volatile_ranges[] = {
     36	regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG),
     37};
     38
     39static const struct regmap_access_table hmc5843_volatile_table = {
     40	.yes_ranges = hmc5843_volatile_ranges,
     41	.n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges),
     42};
     43
     44static const struct regmap_config hmc5843_i2c_regmap_config = {
     45	.reg_bits = 8,
     46	.val_bits = 8,
     47
     48	.rd_table = &hmc5843_readable_table,
     49	.wr_table = &hmc5843_writable_table,
     50	.volatile_table = &hmc5843_volatile_table,
     51
     52	.cache_type = REGCACHE_RBTREE,
     53};
     54
     55static int hmc5843_i2c_probe(struct i2c_client *cli,
     56			     const struct i2c_device_id *id)
     57{
     58	struct regmap *regmap = devm_regmap_init_i2c(cli,
     59			&hmc5843_i2c_regmap_config);
     60	if (IS_ERR(regmap))
     61		return PTR_ERR(regmap);
     62
     63	return hmc5843_common_probe(&cli->dev,
     64			regmap,
     65			id->driver_data, id->name);
     66}
     67
     68static int hmc5843_i2c_remove(struct i2c_client *client)
     69{
     70	hmc5843_common_remove(&client->dev);
     71
     72	return 0;
     73}
     74
     75static const struct i2c_device_id hmc5843_id[] = {
     76	{ "hmc5843", HMC5843_ID },
     77	{ "hmc5883", HMC5883_ID },
     78	{ "hmc5883l", HMC5883L_ID },
     79	{ "hmc5983", HMC5983_ID },
     80	{ }
     81};
     82MODULE_DEVICE_TABLE(i2c, hmc5843_id);
     83
     84static const struct of_device_id hmc5843_of_match[] = {
     85	{ .compatible = "honeywell,hmc5843", .data = (void *)HMC5843_ID },
     86	{ .compatible = "honeywell,hmc5883", .data = (void *)HMC5883_ID },
     87	{ .compatible = "honeywell,hmc5883l", .data = (void *)HMC5883L_ID },
     88	{ .compatible = "honeywell,hmc5983", .data = (void *)HMC5983_ID },
     89	{}
     90};
     91MODULE_DEVICE_TABLE(of, hmc5843_of_match);
     92
     93static struct i2c_driver hmc5843_driver = {
     94	.driver = {
     95		.name	= "hmc5843",
     96		.pm	= HMC5843_PM_OPS,
     97		.of_match_table = hmc5843_of_match,
     98	},
     99	.id_table	= hmc5843_id,
    100	.probe		= hmc5843_i2c_probe,
    101	.remove		= hmc5843_i2c_remove,
    102};
    103module_i2c_driver(hmc5843_driver);
    104
    105MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
    106MODULE_DESCRIPTION("HMC5843/5883/5883L/5983 i2c driver");
    107MODULE_LICENSE("GPL");
    108MODULE_IMPORT_NS(IIO_HMC5843);