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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tps6105x-regulator.c (3236B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Driver for TPS61050/61052 boost converters, typically used for white LEDs
      4 * or audio amplifiers.
      5 *
      6 * Copyright (C) 2011 ST-Ericsson SA
      7 * Written on behalf of Linaro for ST-Ericsson
      8 *
      9 * Author: Linus Walleij <linus.walleij@linaro.org>
     10 */
     11
     12#include <linux/module.h>
     13#include <linux/kernel.h>
     14#include <linux/init.h>
     15#include <linux/err.h>
     16#include <linux/regmap.h>
     17#include <linux/platform_device.h>
     18#include <linux/regulator/driver.h>
     19#include <linux/mfd/core.h>
     20#include <linux/mfd/tps6105x.h>
     21
     22static const unsigned int tps6105x_voltages[] = {
     23	4500000,
     24	5000000,
     25	5250000,
     26	5000000, /* There is an additional 5V */
     27};
     28
     29static const struct regulator_ops tps6105x_regulator_ops = {
     30	.enable		= regulator_enable_regmap,
     31	.disable	= regulator_disable_regmap,
     32	.is_enabled	= regulator_is_enabled_regmap,
     33	.get_voltage_sel = regulator_get_voltage_sel_regmap,
     34	.set_voltage_sel = regulator_set_voltage_sel_regmap,
     35	.list_voltage	= regulator_list_voltage_table,
     36};
     37
     38static const struct regulator_desc tps6105x_regulator_desc = {
     39	.name		= "tps6105x-boost",
     40	.of_match	= of_match_ptr("regulator"),
     41	.ops		= &tps6105x_regulator_ops,
     42	.type		= REGULATOR_VOLTAGE,
     43	.id		= 0,
     44	.owner		= THIS_MODULE,
     45	.n_voltages	= ARRAY_SIZE(tps6105x_voltages),
     46	.volt_table	= tps6105x_voltages,
     47	.vsel_reg	= TPS6105X_REG_0,
     48	.vsel_mask	= TPS6105X_REG0_VOLTAGE_MASK,
     49	.enable_reg	= TPS6105X_REG_0,
     50	.enable_mask	= TPS6105X_REG0_MODE_MASK,
     51	.enable_val	= TPS6105X_REG0_MODE_VOLTAGE <<
     52			  TPS6105X_REG0_MODE_SHIFT,
     53};
     54
     55/*
     56 * Registers the chip as a voltage regulator
     57 */
     58static int tps6105x_regulator_probe(struct platform_device *pdev)
     59{
     60	struct tps6105x *tps6105x = dev_get_platdata(&pdev->dev);
     61	struct tps6105x_platform_data *pdata = tps6105x->pdata;
     62	struct regulator_config config = { };
     63	int ret;
     64
     65	/* This instance is not set for regulator mode so bail out */
     66	if (pdata->mode != TPS6105X_MODE_VOLTAGE) {
     67		dev_info(&pdev->dev,
     68			"chip not in voltage mode mode, exit probe\n");
     69		return 0;
     70	}
     71
     72	config.dev = &tps6105x->client->dev;
     73	config.init_data = pdata->regulator_data;
     74	config.driver_data = tps6105x;
     75	config.of_node = pdev->dev.parent->of_node;
     76	config.regmap = tps6105x->regmap;
     77
     78	/* Register regulator with framework */
     79	tps6105x->regulator = devm_regulator_register(&pdev->dev,
     80						      &tps6105x_regulator_desc,
     81						      &config);
     82	if (IS_ERR(tps6105x->regulator)) {
     83		ret = PTR_ERR(tps6105x->regulator);
     84		dev_err(&tps6105x->client->dev,
     85			"failed to register regulator\n");
     86		return ret;
     87	}
     88	platform_set_drvdata(pdev, tps6105x);
     89
     90	return 0;
     91}
     92
     93static struct platform_driver tps6105x_regulator_driver = {
     94	.driver = {
     95		.name  = "tps6105x-regulator",
     96	},
     97	.probe = tps6105x_regulator_probe,
     98};
     99
    100static __init int tps6105x_regulator_init(void)
    101{
    102	return platform_driver_register(&tps6105x_regulator_driver);
    103}
    104subsys_initcall(tps6105x_regulator_init);
    105
    106static __exit void tps6105x_regulator_exit(void)
    107{
    108	platform_driver_unregister(&tps6105x_regulator_driver);
    109}
    110module_exit(tps6105x_regulator_exit);
    111
    112MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
    113MODULE_DESCRIPTION("TPS6105x regulator driver");
    114MODULE_LICENSE("GPL v2");
    115MODULE_ALIAS("platform:tps6105x-regulator");