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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rt5033-regulator.c (3975B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * Regulator driver for the Richtek RT5033
      4 *
      5 * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
      6 * Author: Beomho Seo <beomho.seo@samsung.com>
      7 */
      8
      9#include <linux/module.h>
     10#include <linux/platform_device.h>
     11#include <linux/regulator/driver.h>
     12#include <linux/mfd/rt5033.h>
     13#include <linux/mfd/rt5033-private.h>
     14#include <linux/regulator/of_regulator.h>
     15
     16static const struct linear_range rt5033_buck_ranges[] = {
     17	REGULATOR_LINEAR_RANGE(1000000, 0, 20, 100000),
     18	REGULATOR_LINEAR_RANGE(3000000, 21, 31, 0),
     19};
     20
     21static const struct linear_range rt5033_ldo_ranges[] = {
     22	REGULATOR_LINEAR_RANGE(1200000, 0, 18, 100000),
     23	REGULATOR_LINEAR_RANGE(3000000, 19, 31, 0),
     24};
     25
     26static const struct regulator_ops rt5033_safe_ldo_ops = {
     27	.is_enabled		= regulator_is_enabled_regmap,
     28	.enable			= regulator_enable_regmap,
     29	.disable		= regulator_disable_regmap,
     30	.list_voltage		= regulator_list_voltage_linear,
     31};
     32
     33static const struct regulator_ops rt5033_buck_ops = {
     34	.is_enabled		= regulator_is_enabled_regmap,
     35	.enable			= regulator_enable_regmap,
     36	.disable		= regulator_disable_regmap,
     37	.list_voltage		= regulator_list_voltage_linear_range,
     38	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
     39	.set_voltage_sel	= regulator_set_voltage_sel_regmap,
     40};
     41
     42static const struct regulator_desc rt5033_supported_regulators[] = {
     43	[RT5033_BUCK] = {
     44		.name		= "BUCK",
     45		.of_match	= of_match_ptr("BUCK"),
     46		.regulators_node = of_match_ptr("regulators"),
     47		.id		= RT5033_BUCK,
     48		.ops		= &rt5033_buck_ops,
     49		.type		= REGULATOR_VOLTAGE,
     50		.owner		= THIS_MODULE,
     51		.n_voltages	= RT5033_REGULATOR_BUCK_VOLTAGE_STEP_NUM,
     52		.linear_ranges	= rt5033_buck_ranges,
     53		.n_linear_ranges = ARRAY_SIZE(rt5033_buck_ranges),
     54		.enable_reg	= RT5033_REG_CTRL,
     55		.enable_mask	= RT5033_CTRL_EN_BUCK_MASK,
     56		.vsel_reg	= RT5033_REG_BUCK_CTRL,
     57		.vsel_mask	= RT5033_BUCK_CTRL_MASK,
     58	},
     59	[RT5033_LDO] = {
     60		.name		= "LDO",
     61		.of_match	= of_match_ptr("LDO"),
     62		.regulators_node = of_match_ptr("regulators"),
     63		.id		= RT5033_LDO,
     64		.ops		= &rt5033_buck_ops,
     65		.type		= REGULATOR_VOLTAGE,
     66		.owner		= THIS_MODULE,
     67		.n_voltages	= RT5033_REGULATOR_LDO_VOLTAGE_STEP_NUM,
     68		.linear_ranges	= rt5033_ldo_ranges,
     69		.n_linear_ranges = ARRAY_SIZE(rt5033_ldo_ranges),
     70		.enable_reg	= RT5033_REG_CTRL,
     71		.enable_mask	= RT5033_CTRL_EN_LDO_MASK,
     72		.vsel_reg	= RT5033_REG_LDO_CTRL,
     73		.vsel_mask	= RT5033_LDO_CTRL_MASK,
     74	},
     75	[RT5033_SAFE_LDO] = {
     76		.name		= "SAFE_LDO",
     77		.of_match	= of_match_ptr("SAFE_LDO"),
     78		.regulators_node = of_match_ptr("regulators"),
     79		.id		= RT5033_SAFE_LDO,
     80		.ops		= &rt5033_safe_ldo_ops,
     81		.type		= REGULATOR_VOLTAGE,
     82		.owner		= THIS_MODULE,
     83		.n_voltages	= 1,
     84		.min_uV		= RT5033_REGULATOR_SAFE_LDO_VOLTAGE,
     85		.enable_reg	= RT5033_REG_CTRL,
     86		.enable_mask	= RT5033_CTRL_EN_SAFE_LDO_MASK,
     87	},
     88};
     89
     90static int rt5033_regulator_probe(struct platform_device *pdev)
     91{
     92	struct rt5033_dev *rt5033 = dev_get_drvdata(pdev->dev.parent);
     93	int ret, i;
     94	struct regulator_config config = {};
     95
     96	config.dev = rt5033->dev;
     97	config.driver_data = rt5033;
     98
     99	for (i = 0; i < ARRAY_SIZE(rt5033_supported_regulators); i++) {
    100		struct regulator_dev *regulator;
    101
    102		config.regmap = rt5033->regmap;
    103
    104		regulator = devm_regulator_register(&pdev->dev,
    105				&rt5033_supported_regulators[i], &config);
    106		if (IS_ERR(regulator)) {
    107			ret = PTR_ERR(regulator);
    108			dev_err(&pdev->dev,
    109				"Regulator init failed %d: with error: %d\n",
    110				i, ret);
    111			return ret;
    112		}
    113	}
    114
    115	return 0;
    116}
    117
    118static const struct platform_device_id rt5033_regulator_id[] = {
    119	{ "rt5033-regulator", },
    120	{ }
    121};
    122MODULE_DEVICE_TABLE(platform, rt5033_regulator_id);
    123
    124static struct platform_driver rt5033_regulator_driver = {
    125	.driver = {
    126		.name = "rt5033-regulator",
    127	},
    128	.probe		= rt5033_regulator_probe,
    129	.id_table	= rt5033_regulator_id,
    130};
    131module_platform_driver(rt5033_regulator_driver);
    132
    133MODULE_DESCRIPTION("Richtek RT5033 Regulator driver");
    134MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
    135MODULE_LICENSE("GPL");