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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da9055-i2c.c (2402B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2 /* I2C access for DA9055 PMICs.
      3 *
      4 * Copyright(c) 2012 Dialog Semiconductor Ltd.
      5 *
      6 * Author: David Dajun Chen <dchen@diasemi.com>
      7 */
      8
      9#include <linux/module.h>
     10#include <linux/device.h>
     11#include <linux/i2c.h>
     12#include <linux/err.h>
     13#include <linux/of.h>
     14#include <linux/of_device.h>
     15
     16#include <linux/mfd/da9055/core.h>
     17
     18static int da9055_i2c_probe(struct i2c_client *i2c,
     19				      const struct i2c_device_id *id)
     20{
     21	struct da9055 *da9055;
     22	int ret;
     23
     24	da9055 = devm_kzalloc(&i2c->dev, sizeof(struct da9055), GFP_KERNEL);
     25	if (!da9055)
     26		return -ENOMEM;
     27
     28	da9055->regmap = devm_regmap_init_i2c(i2c, &da9055_regmap_config);
     29	if (IS_ERR(da9055->regmap)) {
     30		ret = PTR_ERR(da9055->regmap);
     31		dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
     32			ret);
     33		return ret;
     34	}
     35
     36	da9055->dev = &i2c->dev;
     37	da9055->chip_irq = i2c->irq;
     38
     39	i2c_set_clientdata(i2c, da9055);
     40
     41	return da9055_device_init(da9055);
     42}
     43
     44static int da9055_i2c_remove(struct i2c_client *i2c)
     45{
     46	struct da9055 *da9055 = i2c_get_clientdata(i2c);
     47
     48	da9055_device_exit(da9055);
     49
     50	return 0;
     51}
     52
     53/*
     54 * DO NOT change the device Ids. The naming is intentionally specific as both
     55 * the PMIC and CODEC parts of this chip are instantiated separately as I2C
     56 * devices (both have configurable I2C addresses, and are to all intents and
     57 * purposes separate). As a result there are specific DA9055 ids for PMIC
     58 * and CODEC, which must be different to operate together.
     59 */
     60static const struct i2c_device_id da9055_i2c_id[] = {
     61	{"da9055-pmic", 0},
     62	{ }
     63};
     64MODULE_DEVICE_TABLE(i2c, da9055_i2c_id);
     65
     66static const struct of_device_id da9055_of_match[] = {
     67	{ .compatible = "dlg,da9055-pmic", },
     68	{ }
     69};
     70
     71static struct i2c_driver da9055_i2c_driver = {
     72	.probe = da9055_i2c_probe,
     73	.remove = da9055_i2c_remove,
     74	.id_table = da9055_i2c_id,
     75	.driver = {
     76		.name = "da9055-pmic",
     77		.of_match_table = da9055_of_match,
     78	},
     79};
     80
     81static int __init da9055_i2c_init(void)
     82{
     83	int ret;
     84
     85	ret = i2c_add_driver(&da9055_i2c_driver);
     86	if (ret != 0) {
     87		pr_err("DA9055 I2C registration failed %d\n", ret);
     88		return ret;
     89	}
     90
     91	return 0;
     92}
     93subsys_initcall(da9055_i2c_init);
     94
     95static void __exit da9055_i2c_exit(void)
     96{
     97	i2c_del_driver(&da9055_i2c_driver);
     98}
     99module_exit(da9055_i2c_exit);
    100
    101MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
    102MODULE_DESCRIPTION("I2C driver for Dialog DA9055 PMIC");
    103MODULE_LICENSE("GPL");