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

vqmmc-ipq4019-regulator.c (2692B)

      1// SPDX-License-Identifier: GPL-2.0+
      2//
      3// Copyright (c) 2019 Mantas Pucka <mantas@8devices.com>
      4// Copyright (c) 2019 Robert Marko <robert.marko@sartura.hr>
      5//
      6// Driver for IPQ4019 SD/MMC controller's I/O LDO voltage regulator
      7
      8#include <linux/io.h>
      9#include <linux/module.h>
     10#include <linux/of.h>
     11#include <linux/platform_device.h>
     12#include <linux/regmap.h>
     13#include <linux/regulator/driver.h>
     14#include <linux/regulator/machine.h>
     15#include <linux/regulator/of_regulator.h>
     16
     17static const unsigned int ipq4019_vmmc_voltages[] = {
     18	1500000, 1800000, 2500000, 3000000,
     19};
     20
     21static const struct regulator_ops ipq4019_regulator_voltage_ops = {
     22	.list_voltage = regulator_list_voltage_table,
     23	.map_voltage = regulator_map_voltage_ascend,
     24	.get_voltage_sel = regulator_get_voltage_sel_regmap,
     25	.set_voltage_sel = regulator_set_voltage_sel_regmap,
     26};
     27
     28static const struct regulator_desc vmmc_regulator = {
     29	.name		= "vmmcq",
     30	.ops		= &ipq4019_regulator_voltage_ops,
     31	.type		= REGULATOR_VOLTAGE,
     32	.owner		= THIS_MODULE,
     33	.volt_table	= ipq4019_vmmc_voltages,
     34	.n_voltages	= ARRAY_SIZE(ipq4019_vmmc_voltages),
     35	.vsel_reg	= 0,
     36	.vsel_mask	= 0x3,
     37};
     38
     39static const struct regmap_config ipq4019_vmmcq_regmap_config = {
     40	.reg_bits	= 32,
     41	.reg_stride	= 4,
     42	.val_bits	= 32,
     43};
     44
     45static int ipq4019_regulator_probe(struct platform_device *pdev)
     46{
     47	struct device *dev = &pdev->dev;
     48	struct regulator_init_data *init_data;
     49	struct regulator_config cfg = {};
     50	struct regulator_dev *rdev;
     51	struct regmap *rmap;
     52	void __iomem *base;
     53
     54	init_data = of_get_regulator_init_data(dev, dev->of_node,
     55					       &vmmc_regulator);
     56	if (!init_data)
     57		return -EINVAL;
     58
     59	base = devm_platform_ioremap_resource(pdev, 0);
     60	if (IS_ERR(base))
     61		return PTR_ERR(base);
     62
     63	rmap = devm_regmap_init_mmio(dev, base, &ipq4019_vmmcq_regmap_config);
     64	if (IS_ERR(rmap))
     65		return PTR_ERR(rmap);
     66
     67	cfg.dev = dev;
     68	cfg.init_data = init_data;
     69	cfg.of_node = dev->of_node;
     70	cfg.regmap = rmap;
     71
     72	rdev = devm_regulator_register(dev, &vmmc_regulator, &cfg);
     73	if (IS_ERR(rdev)) {
     74		dev_err(dev, "Failed to register regulator: %ld\n",
     75			PTR_ERR(rdev));
     76		return PTR_ERR(rdev);
     77	}
     78	platform_set_drvdata(pdev, rdev);
     79
     80	return 0;
     81}
     82
     83static const struct of_device_id regulator_ipq4019_of_match[] = {
     84	{ .compatible = "qcom,vqmmc-ipq4019-regulator", },
     85	{},
     86};
     87
     88static struct platform_driver ipq4019_regulator_driver = {
     89	.probe = ipq4019_regulator_probe,
     90	.driver = {
     91		.name = "vqmmc-ipq4019-regulator",
     92		.of_match_table = of_match_ptr(regulator_ipq4019_of_match),
     93	},
     94};
     95module_platform_driver(ipq4019_regulator_driver);
     96
     97MODULE_LICENSE("GPL");
     98MODULE_AUTHOR("Mantas Pucka <mantas@8devices.com>");
     99MODULE_DESCRIPTION("IPQ4019 VQMMC voltage regulator");