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-regulator.c (2513B)

      1// SPDX-License-Identifier: GPL-2.0
      2//
      3// sky81452-regulator.c	SKY81452 regulator driver
      4//
      5// Copyright 2014 Skyworks Solutions Inc.
      6// Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
      7
      8#include <linux/module.h>
      9#include <linux/kernel.h>
     10#include <linux/platform_device.h>
     11#include <linux/init.h>
     12#include <linux/err.h>
     13#include <linux/of.h>
     14#include <linux/regulator/driver.h>
     15#include <linux/regulator/of_regulator.h>
     16
     17/* registers */
     18#define SKY81452_REG1	0x01
     19#define SKY81452_REG3	0x03
     20
     21/* bit mask */
     22#define SKY81452_LEN	0x40
     23#define SKY81452_LOUT	0x1F
     24
     25static const struct regulator_ops sky81452_reg_ops = {
     26	.list_voltage = regulator_list_voltage_linear_range,
     27	.map_voltage = regulator_map_voltage_linear_range,
     28	.get_voltage_sel = regulator_get_voltage_sel_regmap,
     29	.set_voltage_sel = regulator_set_voltage_sel_regmap,
     30	.enable = regulator_enable_regmap,
     31	.disable = regulator_disable_regmap,
     32	.is_enabled = regulator_is_enabled_regmap,
     33};
     34
     35static const struct linear_range sky81452_reg_ranges[] = {
     36	REGULATOR_LINEAR_RANGE(4500000, 0, 14, 250000),
     37	REGULATOR_LINEAR_RANGE(9000000, 15, 31, 1000000),
     38};
     39
     40static const struct regulator_desc sky81452_reg = {
     41	.name = "LOUT",
     42	.of_match = of_match_ptr("lout"),
     43	.regulators_node = of_match_ptr("regulator"),
     44	.ops = &sky81452_reg_ops,
     45	.type = REGULATOR_VOLTAGE,
     46	.owner = THIS_MODULE,
     47	.n_voltages = SKY81452_LOUT + 1,
     48	.linear_ranges = sky81452_reg_ranges,
     49	.n_linear_ranges = ARRAY_SIZE(sky81452_reg_ranges),
     50	.vsel_reg = SKY81452_REG3,
     51	.vsel_mask = SKY81452_LOUT,
     52	.enable_reg = SKY81452_REG1,
     53	.enable_mask = SKY81452_LEN,
     54};
     55
     56static int sky81452_reg_probe(struct platform_device *pdev)
     57{
     58	struct device *dev = &pdev->dev;
     59	const struct regulator_init_data *init_data = dev_get_platdata(dev);
     60	struct regulator_config config = { };
     61	struct regulator_dev *rdev;
     62
     63	config.dev = dev->parent;
     64	config.init_data = init_data;
     65	config.of_node = dev->of_node;
     66	config.regmap = dev_get_drvdata(dev->parent);
     67
     68	rdev = devm_regulator_register(dev, &sky81452_reg, &config);
     69	if (IS_ERR(rdev)) {
     70		dev_err(dev, "failed to register. err=%ld\n", PTR_ERR(rdev));
     71		return PTR_ERR(rdev);
     72	}
     73
     74	platform_set_drvdata(pdev, rdev);
     75
     76	return 0;
     77}
     78
     79static struct platform_driver sky81452_reg_driver = {
     80	.driver = {
     81		.name = "sky81452-regulator",
     82	},
     83	.probe = sky81452_reg_probe,
     84};
     85
     86module_platform_driver(sky81452_reg_driver);
     87
     88MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver");
     89MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
     90MODULE_LICENSE("GPL v2");