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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axp20x-i2c.c (2889B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * I2C driver for the X-Powers' Power Management ICs
      4 *
      5 * AXP20x typically comprises an adaptive USB-Compatible PWM charger, BUCK DC-DC
      6 * converters, LDOs, multiple 12-bit ADCs of voltage, current and temperature
      7 * as well as configurable GPIOs.
      8 *
      9 * This driver supports the I2C variants.
     10 *
     11 * Copyright (C) 2014 Carlo Caione
     12 *
     13 * Author: Carlo Caione <carlo@caione.org>
     14 */
     15
     16#include <linux/acpi.h>
     17#include <linux/err.h>
     18#include <linux/i2c.h>
     19#include <linux/module.h>
     20#include <linux/mfd/axp20x.h>
     21#include <linux/of.h>
     22#include <linux/regmap.h>
     23#include <linux/slab.h>
     24
     25static int axp20x_i2c_probe(struct i2c_client *i2c,
     26			    const struct i2c_device_id *id)
     27{
     28	struct axp20x_dev *axp20x;
     29	int ret;
     30
     31	axp20x = devm_kzalloc(&i2c->dev, sizeof(*axp20x), GFP_KERNEL);
     32	if (!axp20x)
     33		return -ENOMEM;
     34
     35	axp20x->dev = &i2c->dev;
     36	axp20x->irq = i2c->irq;
     37	dev_set_drvdata(axp20x->dev, axp20x);
     38
     39	ret = axp20x_match_device(axp20x);
     40	if (ret)
     41		return ret;
     42
     43	axp20x->regmap = devm_regmap_init_i2c(i2c, axp20x->regmap_cfg);
     44	if (IS_ERR(axp20x->regmap)) {
     45		ret = PTR_ERR(axp20x->regmap);
     46		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
     47		return ret;
     48	}
     49
     50	return axp20x_device_probe(axp20x);
     51}
     52
     53static int axp20x_i2c_remove(struct i2c_client *i2c)
     54{
     55	struct axp20x_dev *axp20x = i2c_get_clientdata(i2c);
     56
     57	axp20x_device_remove(axp20x);
     58
     59	return 0;
     60}
     61
     62#ifdef CONFIG_OF
     63static const struct of_device_id axp20x_i2c_of_match[] = {
     64	{ .compatible = "x-powers,axp152", .data = (void *)AXP152_ID },
     65	{ .compatible = "x-powers,axp202", .data = (void *)AXP202_ID },
     66	{ .compatible = "x-powers,axp209", .data = (void *)AXP209_ID },
     67	{ .compatible = "x-powers,axp221", .data = (void *)AXP221_ID },
     68	{ .compatible = "x-powers,axp223", .data = (void *)AXP223_ID },
     69	{ .compatible = "x-powers,axp803", .data = (void *)AXP803_ID },
     70	{ .compatible = "x-powers,axp806", .data = (void *)AXP806_ID },
     71	{ },
     72};
     73MODULE_DEVICE_TABLE(of, axp20x_i2c_of_match);
     74#endif
     75
     76static const struct i2c_device_id axp20x_i2c_id[] = {
     77	{ "axp152", 0 },
     78	{ "axp202", 0 },
     79	{ "axp209", 0 },
     80	{ "axp221", 0 },
     81	{ "axp223", 0 },
     82	{ "axp803", 0 },
     83	{ "axp806", 0 },
     84	{ },
     85};
     86MODULE_DEVICE_TABLE(i2c, axp20x_i2c_id);
     87
     88#ifdef CONFIG_ACPI
     89static const struct acpi_device_id axp20x_i2c_acpi_match[] = {
     90	{
     91		.id = "INT33F4",
     92		.driver_data = AXP288_ID,
     93	},
     94	{ },
     95};
     96MODULE_DEVICE_TABLE(acpi, axp20x_i2c_acpi_match);
     97#endif
     98
     99static struct i2c_driver axp20x_i2c_driver = {
    100	.driver = {
    101		.name	= "axp20x-i2c",
    102		.of_match_table	= of_match_ptr(axp20x_i2c_of_match),
    103		.acpi_match_table = ACPI_PTR(axp20x_i2c_acpi_match),
    104	},
    105	.probe		= axp20x_i2c_probe,
    106	.remove		= axp20x_i2c_remove,
    107	.id_table	= axp20x_i2c_id,
    108};
    109
    110module_i2c_driver(axp20x_i2c_driver);
    111
    112MODULE_DESCRIPTION("PMIC MFD I2C driver for AXP20X");
    113MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
    114MODULE_LICENSE("GPL");