cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

mp2629.c (1854B)

      1// SPDX-License-Identifier: GPL-2.0+
      2/*
      3 * MP2629 parent driver for ADC and battery charger
      4 *
      5 * Copyright 2020 Monolithic Power Systems, Inc
      6 *
      7 * Author: Saravanan Sekar <sravanhome@gmail.com>
      8 */
      9
     10#include <linux/i2c.h>
     11#include <linux/kernel.h>
     12#include <linux/mfd/core.h>
     13#include <linux/mfd/mp2629.h>
     14#include <linux/module.h>
     15#include <linux/platform_device.h>
     16#include <linux/regmap.h>
     17#include <linux/slab.h>
     18
     19static const struct mfd_cell mp2629_cell[] = {
     20	{
     21		.name = "mp2629_adc",
     22		.of_compatible = "mps,mp2629_adc",
     23	},
     24	{
     25		.name = "mp2629_charger",
     26		.of_compatible = "mps,mp2629_charger",
     27	}
     28};
     29
     30static const struct regmap_config mp2629_regmap_config = {
     31	.reg_bits = 8,
     32	.val_bits = 8,
     33	.max_register = 0x17,
     34};
     35
     36static int mp2629_probe(struct i2c_client *client)
     37{
     38	struct mp2629_data *ddata;
     39	int ret;
     40
     41	ddata = devm_kzalloc(&client->dev, sizeof(*ddata), GFP_KERNEL);
     42	if (!ddata)
     43		return -ENOMEM;
     44
     45	ddata->dev = &client->dev;
     46	i2c_set_clientdata(client, ddata);
     47
     48	ddata->regmap = devm_regmap_init_i2c(client, &mp2629_regmap_config);
     49	if (IS_ERR(ddata->regmap)) {
     50		dev_err(ddata->dev, "Failed to allocate regmap\n");
     51		return PTR_ERR(ddata->regmap);
     52	}
     53
     54	ret = devm_mfd_add_devices(ddata->dev, PLATFORM_DEVID_AUTO, mp2629_cell,
     55				   ARRAY_SIZE(mp2629_cell), NULL, 0, NULL);
     56	if (ret)
     57		dev_err(ddata->dev, "Failed to register sub-devices %d\n", ret);
     58
     59	return ret;
     60}
     61
     62static const struct of_device_id mp2629_of_match[] = {
     63	{ .compatible = "mps,mp2629"},
     64	{ }
     65};
     66MODULE_DEVICE_TABLE(of, mp2629_of_match);
     67
     68static struct i2c_driver mp2629_driver = {
     69	.driver = {
     70		.name = "mp2629",
     71		.of_match_table = mp2629_of_match,
     72	},
     73	.probe_new	= mp2629_probe,
     74};
     75module_i2c_driver(mp2629_driver);
     76
     77MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>");
     78MODULE_DESCRIPTION("MP2629 Battery charger parent driver");
     79MODULE_LICENSE("GPL");