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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arizona-i2c.c (3256B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Arizona-i2c.c  --  Arizona I2C bus interface
      4 *
      5 * Copyright 2012 Wolfson Microelectronics plc
      6 *
      7 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
      8 */
      9
     10#include <linux/err.h>
     11#include <linux/i2c.h>
     12#include <linux/module.h>
     13#include <linux/pm_runtime.h>
     14#include <linux/regmap.h>
     15#include <linux/regulator/consumer.h>
     16#include <linux/slab.h>
     17#include <linux/of.h>
     18
     19#include <linux/mfd/arizona/core.h>
     20
     21#include "arizona.h"
     22
     23static int arizona_i2c_probe(struct i2c_client *i2c,
     24			     const struct i2c_device_id *id)
     25{
     26	const void *match_data;
     27	struct arizona *arizona;
     28	const struct regmap_config *regmap_config = NULL;
     29	unsigned long type = 0;
     30	int ret;
     31
     32	match_data = device_get_match_data(&i2c->dev);
     33	if (match_data)
     34		type = (unsigned long)match_data;
     35	else if (id)
     36		type = id->driver_data;
     37
     38	switch (type) {
     39	case WM5102:
     40		if (IS_ENABLED(CONFIG_MFD_WM5102))
     41			regmap_config = &wm5102_i2c_regmap;
     42		break;
     43	case WM5110:
     44	case WM8280:
     45		if (IS_ENABLED(CONFIG_MFD_WM5110))
     46			regmap_config = &wm5110_i2c_regmap;
     47		break;
     48	case WM8997:
     49		if (IS_ENABLED(CONFIG_MFD_WM8997))
     50			regmap_config = &wm8997_i2c_regmap;
     51		break;
     52	case WM8998:
     53	case WM1814:
     54		if (IS_ENABLED(CONFIG_MFD_WM8998))
     55			regmap_config = &wm8998_i2c_regmap;
     56		break;
     57	default:
     58		dev_err(&i2c->dev, "Unknown device type %ld\n", type);
     59		return -EINVAL;
     60	}
     61
     62	if (!regmap_config) {
     63		dev_err(&i2c->dev,
     64			"No kernel support for device type %ld\n", type);
     65		return -EINVAL;
     66	}
     67
     68	arizona = devm_kzalloc(&i2c->dev, sizeof(*arizona), GFP_KERNEL);
     69	if (arizona == NULL)
     70		return -ENOMEM;
     71
     72	arizona->regmap = devm_regmap_init_i2c(i2c, regmap_config);
     73	if (IS_ERR(arizona->regmap)) {
     74		ret = PTR_ERR(arizona->regmap);
     75		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
     76			ret);
     77		return ret;
     78	}
     79
     80	arizona->type = type;
     81	arizona->dev = &i2c->dev;
     82	arizona->irq = i2c->irq;
     83
     84	return arizona_dev_init(arizona);
     85}
     86
     87static int arizona_i2c_remove(struct i2c_client *i2c)
     88{
     89	struct arizona *arizona = dev_get_drvdata(&i2c->dev);
     90
     91	arizona_dev_exit(arizona);
     92
     93	return 0;
     94}
     95
     96static const struct i2c_device_id arizona_i2c_id[] = {
     97	{ "wm5102", WM5102 },
     98	{ "wm5110", WM5110 },
     99	{ "wm8280", WM8280 },
    100	{ "wm8997", WM8997 },
    101	{ "wm8998", WM8998 },
    102	{ "wm1814", WM1814 },
    103	{ }
    104};
    105MODULE_DEVICE_TABLE(i2c, arizona_i2c_id);
    106
    107#ifdef CONFIG_OF
    108static const struct of_device_id arizona_i2c_of_match[] = {
    109	{ .compatible = "wlf,wm5102", .data = (void *)WM5102 },
    110	{ .compatible = "wlf,wm5110", .data = (void *)WM5110 },
    111	{ .compatible = "wlf,wm8280", .data = (void *)WM8280 },
    112	{ .compatible = "wlf,wm8997", .data = (void *)WM8997 },
    113	{ .compatible = "wlf,wm8998", .data = (void *)WM8998 },
    114	{ .compatible = "wlf,wm1814", .data = (void *)WM1814 },
    115	{},
    116};
    117#endif
    118
    119static struct i2c_driver arizona_i2c_driver = {
    120	.driver = {
    121		.name	= "arizona",
    122		.pm	= &arizona_pm_ops,
    123		.of_match_table	= of_match_ptr(arizona_i2c_of_match),
    124	},
    125	.probe		= arizona_i2c_probe,
    126	.remove		= arizona_i2c_remove,
    127	.id_table	= arizona_i2c_id,
    128};
    129
    130module_i2c_driver(arizona_i2c_driver);
    131
    132MODULE_SOFTDEP("pre: arizona_ldo1");
    133MODULE_DESCRIPTION("Arizona I2C bus interface");
    134MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
    135MODULE_LICENSE("GPL");