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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sky81452.c (2204B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * sky81452.c	SKY81452 MFD driver
      4 *
      5 * Copyright 2014 Skyworks Solutions Inc.
      6 * Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
      7 */
      8
      9#include <linux/kernel.h>
     10#include <linux/module.h>
     11#include <linux/init.h>
     12#include <linux/err.h>
     13#include <linux/slab.h>
     14#include <linux/i2c.h>
     15#include <linux/regmap.h>
     16#include <linux/mfd/core.h>
     17#include <linux/mfd/sky81452.h>
     18
     19static const struct regmap_config sky81452_config = {
     20	.reg_bits = 8,
     21	.val_bits = 8,
     22};
     23
     24static int sky81452_probe(struct i2c_client *client,
     25				const struct i2c_device_id *id)
     26{
     27	struct device *dev = &client->dev;
     28	const struct sky81452_platform_data *pdata = dev_get_platdata(dev);
     29	struct mfd_cell cells[2];
     30	struct regmap *regmap;
     31	int ret;
     32
     33	if (!pdata) {
     34		pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
     35		if (!pdata)
     36			return -ENOMEM;
     37	}
     38
     39	regmap = devm_regmap_init_i2c(client, &sky81452_config);
     40	if (IS_ERR(regmap)) {
     41		dev_err(dev, "failed to initialize.err=%ld\n", PTR_ERR(regmap));
     42		return PTR_ERR(regmap);
     43	}
     44
     45	i2c_set_clientdata(client, regmap);
     46
     47	memset(cells, 0, sizeof(cells));
     48	cells[0].name = "sky81452-backlight";
     49	cells[0].of_compatible = "skyworks,sky81452-backlight";
     50	cells[1].name = "sky81452-regulator";
     51	cells[1].platform_data = pdata->regulator_init_data;
     52	cells[1].pdata_size = sizeof(*pdata->regulator_init_data);
     53
     54	ret = devm_mfd_add_devices(dev, -1, cells, ARRAY_SIZE(cells),
     55				   NULL, 0, NULL);
     56	if (ret)
     57		dev_err(dev, "failed to add child devices. err=%d\n", ret);
     58
     59	return ret;
     60}
     61
     62static const struct i2c_device_id sky81452_ids[] = {
     63	{ "sky81452" },
     64	{ }
     65};
     66MODULE_DEVICE_TABLE(i2c, sky81452_ids);
     67
     68#ifdef CONFIG_OF
     69static const struct of_device_id sky81452_of_match[] = {
     70	{ .compatible = "skyworks,sky81452", },
     71	{ }
     72};
     73MODULE_DEVICE_TABLE(of, sky81452_of_match);
     74#endif
     75
     76static struct i2c_driver sky81452_driver = {
     77	.driver = {
     78		.name = "sky81452",
     79		.of_match_table = of_match_ptr(sky81452_of_match),
     80	},
     81	.probe = sky81452_probe,
     82	.id_table = sky81452_ids,
     83};
     84
     85module_i2c_driver(sky81452_driver);
     86
     87MODULE_DESCRIPTION("Skyworks SKY81452 MFD driver");
     88MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
     89MODULE_LICENSE("GPL v2");