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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hi6421v530-regulator.c (5871B)


      1// SPDX-License-Identifier: GPL-2.0
      2//
      3// Device driver for regulators in Hi6421V530 IC
      4//
      5// Copyright (c) <2017> HiSilicon Technologies Co., Ltd.
      6//              http://www.hisilicon.com
      7// Copyright (c) <2017> Linaro Ltd.
      8//              https://www.linaro.org
      9//
     10// Author: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
     11//         Guodong Xu <guodong.xu@linaro.org>
     12
     13#include <linux/mfd/hi6421-pmic.h>
     14#include <linux/module.h>
     15#include <linux/of.h>
     16#include <linux/platform_device.h>
     17#include <linux/regmap.h>
     18#include <linux/regulator/driver.h>
     19
     20/*
     21 * struct hi6421v530_regulator_info - hi6421v530 regulator information
     22 * @desc: regulator description
     23 * @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep
     24 * @eco_microamp: eco mode load upper limit (in uA), valid for LDOs only
     25 */
     26struct hi6421v530_regulator_info {
     27	struct regulator_desc rdesc;
     28	u8 mode_mask;
     29	u32 eco_microamp;
     30};
     31
     32/* HI6421v530 regulators */
     33enum hi6421v530_regulator_id {
     34	HI6421V530_LDO3,
     35	HI6421V530_LDO9,
     36	HI6421V530_LDO11,
     37	HI6421V530_LDO15,
     38	HI6421V530_LDO16,
     39};
     40
     41static const unsigned int ldo_3_voltages[] = {
     42	1800000, 1825000, 1850000, 1875000,
     43	1900000, 1925000, 1950000, 1975000,
     44	2000000, 2025000, 2050000, 2075000,
     45	2100000, 2125000, 2150000, 2200000,
     46};
     47
     48static const unsigned int ldo_9_11_voltages[] = {
     49	1750000, 1800000, 1825000, 2800000,
     50	2850000, 2950000, 3000000, 3300000,
     51};
     52
     53static const unsigned int ldo_15_16_voltages[] = {
     54	1750000, 1800000, 2400000, 2600000,
     55	2700000, 2850000, 2950000, 3000000,
     56};
     57
     58static const struct regulator_ops hi6421v530_ldo_ops;
     59
     60#define HI6421V530_LDO_ENABLE_TIME (350)
     61
     62/*
     63 * _id - LDO id name string
     64 * v_table - voltage table
     65 * vreg - voltage select register
     66 * vmask - voltage select mask
     67 * ereg - enable register
     68 * emask - enable mask
     69 * odelay - off/on delay time in uS
     70 * ecomask - eco mode mask
     71 * ecoamp - eco mode load uppler limit in uA
     72 */
     73#define HI6421V530_LDO(_ID, v_table, vreg, vmask, ereg, emask,		\
     74		   odelay, ecomask, ecoamp) {				\
     75	.rdesc = {							\
     76		.name		 = #_ID,				\
     77		.of_match        = of_match_ptr(#_ID),			\
     78		.regulators_node = of_match_ptr("regulators"),		\
     79		.ops		 = &hi6421v530_ldo_ops,			\
     80		.type		 = REGULATOR_VOLTAGE,			\
     81		.id		 = HI6421V530_##_ID,			\
     82		.owner		 = THIS_MODULE,				\
     83		.n_voltages	 = ARRAY_SIZE(v_table),			\
     84		.volt_table	 = v_table,				\
     85		.vsel_reg	 = HI6421_REG_TO_BUS_ADDR(vreg),	\
     86		.vsel_mask	 = vmask,				\
     87		.enable_reg	 = HI6421_REG_TO_BUS_ADDR(ereg),	\
     88		.enable_mask	 = emask,				\
     89		.enable_time	 = HI6421V530_LDO_ENABLE_TIME,		\
     90		.off_on_delay	 = odelay,				\
     91	},								\
     92	.mode_mask	= ecomask,					\
     93	.eco_microamp	= ecoamp,					\
     94}
     95
     96/* HI6421V530 regulator information */
     97
     98static struct hi6421v530_regulator_info hi6421v530_regulator_info[] = {
     99	HI6421V530_LDO(LDO3, ldo_3_voltages, 0x061, 0xf, 0x060, 0x2,
    100		   20000, 0x6, 8000),
    101	HI6421V530_LDO(LDO9, ldo_9_11_voltages, 0x06b, 0x7, 0x06a, 0x2,
    102		   40000, 0x6, 8000),
    103	HI6421V530_LDO(LDO11, ldo_9_11_voltages, 0x06f, 0x7, 0x06e, 0x2,
    104		   40000, 0x6, 8000),
    105	HI6421V530_LDO(LDO15, ldo_15_16_voltages, 0x077, 0x7, 0x076, 0x2,
    106		   40000, 0x6, 8000),
    107	HI6421V530_LDO(LDO16, ldo_15_16_voltages, 0x079, 0x7, 0x078, 0x2,
    108		   40000, 0x6, 8000),
    109};
    110
    111static unsigned int hi6421v530_regulator_ldo_get_mode(
    112					struct regulator_dev *rdev)
    113{
    114	struct hi6421v530_regulator_info *info;
    115	unsigned int reg_val;
    116
    117	info = rdev_get_drvdata(rdev);
    118	regmap_read(rdev->regmap, rdev->desc->enable_reg, &reg_val);
    119
    120	if (reg_val & (info->mode_mask))
    121		return REGULATOR_MODE_IDLE;
    122
    123	return REGULATOR_MODE_NORMAL;
    124}
    125
    126static int hi6421v530_regulator_ldo_set_mode(struct regulator_dev *rdev,
    127						unsigned int mode)
    128{
    129	struct hi6421v530_regulator_info *info;
    130	unsigned int new_mode;
    131
    132	info = rdev_get_drvdata(rdev);
    133	switch (mode) {
    134	case REGULATOR_MODE_NORMAL:
    135		new_mode = 0;
    136		break;
    137	case REGULATOR_MODE_IDLE:
    138		new_mode = info->mode_mask;
    139		break;
    140	default:
    141		return -EINVAL;
    142	}
    143
    144	regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
    145			   info->mode_mask, new_mode);
    146
    147	return 0;
    148}
    149
    150
    151static const struct regulator_ops hi6421v530_ldo_ops = {
    152	.is_enabled = regulator_is_enabled_regmap,
    153	.enable = regulator_enable_regmap,
    154	.disable = regulator_disable_regmap,
    155	.list_voltage = regulator_list_voltage_table,
    156	.map_voltage = regulator_map_voltage_ascend,
    157	.get_voltage_sel = regulator_get_voltage_sel_regmap,
    158	.set_voltage_sel = regulator_set_voltage_sel_regmap,
    159	.get_mode = hi6421v530_regulator_ldo_get_mode,
    160	.set_mode = hi6421v530_regulator_ldo_set_mode,
    161};
    162
    163static int hi6421v530_regulator_probe(struct platform_device *pdev)
    164{
    165	struct hi6421_pmic *pmic;
    166	struct regulator_dev *rdev;
    167	struct regulator_config config = { };
    168	unsigned int i;
    169
    170	pmic = dev_get_drvdata(pdev->dev.parent);
    171	if (!pmic) {
    172		dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
    173		return -ENODEV;
    174	}
    175
    176	for (i = 0; i < ARRAY_SIZE(hi6421v530_regulator_info); i++) {
    177		config.dev = pdev->dev.parent;
    178		config.regmap = pmic->regmap;
    179		config.driver_data = &hi6421v530_regulator_info[i];
    180
    181		rdev = devm_regulator_register(&pdev->dev,
    182				&hi6421v530_regulator_info[i].rdesc,
    183				&config);
    184		if (IS_ERR(rdev)) {
    185			dev_err(&pdev->dev, "failed to register regulator %s\n",
    186				hi6421v530_regulator_info[i].rdesc.name);
    187			return PTR_ERR(rdev);
    188		}
    189	}
    190	return 0;
    191}
    192
    193static const struct platform_device_id hi6421v530_regulator_table[] = {
    194	{ .name = "hi6421v530-regulator" },
    195	{},
    196};
    197MODULE_DEVICE_TABLE(platform, hi6421v530_regulator_table);
    198
    199static struct platform_driver hi6421v530_regulator_driver = {
    200	.id_table = hi6421v530_regulator_table,
    201	.driver = {
    202		.name	= "hi6421v530-regulator",
    203	},
    204	.probe	= hi6421v530_regulator_probe,
    205};
    206module_platform_driver(hi6421v530_regulator_driver);
    207
    208MODULE_AUTHOR("Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>");
    209MODULE_DESCRIPTION("Hi6421v530 regulator driver");
    210MODULE_LICENSE("GPL v2");