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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cs35l41-i2c.c (2433B)

      1// SPDX-License-Identifier: GPL-2.0
      2//
      3// cs35l41-i2c.c -- CS35l41 I2C driver
      4//
      5// Copyright 2017-2021 Cirrus Logic, Inc.
      6//
      7// Author: David Rhodes <david.rhodes@cirrus.com>
      8
      9#include <linux/acpi.h>
     10#include <linux/delay.h>
     11#include <linux/i2c.h>
     12#include <linux/init.h>
     13#include <linux/kernel.h>
     14#include <linux/module.h>
     15#include <linux/moduleparam.h>
     16#include <linux/of_device.h>
     17#include <linux/platform_device.h>
     18#include <linux/slab.h>
     19
     20#include "cs35l41.h"
     21
     22static const struct i2c_device_id cs35l41_id_i2c[] = {
     23	{ "cs35l40", 0 },
     24	{ "cs35l41", 0 },
     25	{ "cs35l51", 0 },
     26	{ "cs35l53", 0 },
     27	{}
     28};
     29
     30MODULE_DEVICE_TABLE(i2c, cs35l41_id_i2c);
     31
     32static int cs35l41_i2c_probe(struct i2c_client *client)
     33{
     34	struct cs35l41_private *cs35l41;
     35	struct device *dev = &client->dev;
     36	struct cs35l41_hw_cfg *hw_cfg = dev_get_platdata(dev);
     37	const struct regmap_config *regmap_config = &cs35l41_regmap_i2c;
     38	int ret;
     39
     40	cs35l41 = devm_kzalloc(dev, sizeof(struct cs35l41_private), GFP_KERNEL);
     41
     42	if (!cs35l41)
     43		return -ENOMEM;
     44
     45	cs35l41->dev = dev;
     46	cs35l41->irq = client->irq;
     47
     48	i2c_set_clientdata(client, cs35l41);
     49	cs35l41->regmap = devm_regmap_init_i2c(client, regmap_config);
     50	if (IS_ERR(cs35l41->regmap)) {
     51		ret = PTR_ERR(cs35l41->regmap);
     52		dev_err(cs35l41->dev, "Failed to allocate register map: %d\n", ret);
     53		return ret;
     54	}
     55
     56	return cs35l41_probe(cs35l41, hw_cfg);
     57}
     58
     59static int cs35l41_i2c_remove(struct i2c_client *client)
     60{
     61	struct cs35l41_private *cs35l41 = i2c_get_clientdata(client);
     62
     63	cs35l41_remove(cs35l41);
     64
     65	return 0;
     66}
     67
     68#ifdef CONFIG_OF
     69static const struct of_device_id cs35l41_of_match[] = {
     70	{ .compatible = "cirrus,cs35l40" },
     71	{ .compatible = "cirrus,cs35l41" },
     72	{},
     73};
     74MODULE_DEVICE_TABLE(of, cs35l41_of_match);
     75#endif
     76
     77#ifdef CONFIG_ACPI
     78static const struct acpi_device_id cs35l41_acpi_match[] = {
     79	{ "CSC3541", 0 }, /* Cirrus Logic PnP ID + part ID */
     80	{},
     81};
     82MODULE_DEVICE_TABLE(acpi, cs35l41_acpi_match);
     83#endif
     84
     85static struct i2c_driver cs35l41_i2c_driver = {
     86	.driver = {
     87		.name		= "cs35l41",
     88		.pm		= &cs35l41_pm_ops,
     89		.of_match_table = of_match_ptr(cs35l41_of_match),
     90		.acpi_match_table = ACPI_PTR(cs35l41_acpi_match),
     91	},
     92	.id_table	= cs35l41_id_i2c,
     93	.probe_new	= cs35l41_i2c_probe,
     94	.remove		= cs35l41_i2c_remove,
     95};
     96
     97module_i2c_driver(cs35l41_i2c_driver);
     98
     99MODULE_DESCRIPTION("I2C CS35L41 driver");
    100MODULE_AUTHOR("David Rhodes, Cirrus Logic Inc, <david.rhodes@cirrus.com>");
    101MODULE_LICENSE("GPL");