regulator: hi6421v530: add driver for hi6421v530 voltage regulator (5c7024ae) · Commits · e / devices / android_kernel_oneplus_sm7250

drivers/regulator/Kconfig

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		@@ -296,6 +296,16 @@ config REGULATOR_HI6421
		21 general purpose LDOs, 3 dedicated LDOs, and 5 BUCKs. All
		of them come with support to either ECO (idle) or sleep mode.

		config REGULATOR_HI6421V530
		tristate "HiSilicon Hi6421v530 PMIC voltage regulator support"
		depends on MFD_HI6421_PMIC && OF
		help
		This driver provides support for the voltage regulators on
		HiSilicon Hi6421v530 PMU / Codec IC.
		Hi6421v530 is a multi-function device which, on regulator part,
		provides 5 general purpose LDOs, and all of them come with support
		to either ECO (idle) or sleep mode.

		config REGULATOR_HI655X
		tristate "Hisilicon HI655X PMIC regulators support"
		depends on ARCH_HISI \|\| COMPILE_TEST

drivers/regulator/Makefile

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		@@ -38,6 +38,7 @@ obj-$(CONFIG_REGULATOR_DB8500_PRCMU) += db8500-prcmu.o
		obj-$(CONFIG_REGULATOR_FAN53555) += fan53555.o
		obj-$(CONFIG_REGULATOR_GPIO) += gpio-regulator.o
		obj-$(CONFIG_REGULATOR_HI6421) += hi6421-regulator.o
		obj-$(CONFIG_REGULATOR_HI6421V530) += hi6421v530-regulator.o
		obj-$(CONFIG_REGULATOR_HI655X) += hi655x-regulator.o
		obj-$(CONFIG_REGULATOR_ISL6271A) += isl6271a-regulator.o
		obj-$(CONFIG_REGULATOR_ISL9305) += isl9305.o

drivers/regulator/hi6421v530-regulator.c

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		/*
		* Device driver for regulators in Hi6421V530 IC
		*
		* Copyright (c) <2017> HiSilicon Technologies Co., Ltd.
		* http://www.hisilicon.com
		* Copyright (c) <2017> Linaro Ltd.
		* http://www.linaro.org
		*
		* Author: Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>
		* Guodong Xu <guodong.xu@linaro.org>
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License version 2 as
		* published by the Free Software Foundation.
		*/

		#include <linux/mfd/hi6421-pmic.h>
		#include <linux/module.h>
		#include <linux/of.h>
		#include <linux/platform_device.h>
		#include <linux/regmap.h>
		#include <linux/regulator/driver.h>

		/*
		* struct hi6421v530_regulator_info - hi6421v530 regulator information
		* @desc: regulator description
		* @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep
		* @eco_microamp: eco mode load upper limit (in uA), valid for LDOs only
		*/
		struct hi6421v530_regulator_info {
		struct regulator_desc rdesc;
		u8 mode_mask;
		u32 eco_microamp;
		};

		/* HI6421v530 regulators */
		enum hi6421v530_regulator_id {
		HI6421V530_LDO3,
		HI6421V530_LDO9,
		HI6421V530_LDO11,
		HI6421V530_LDO15,
		HI6421V530_LDO16,
		};

		static const unsigned int ldo_3_voltages[] = {
		1800000, 1825000, 1850000, 1875000,
		1900000, 1925000, 1950000, 1975000,
		2000000, 2025000, 2050000, 2075000,
		2100000, 2125000, 2150000, 2200000,
		};

		static const unsigned int ldo_9_11_voltages[] = {
		1750000, 1800000, 1825000, 2800000,
		2850000, 2950000, 3000000, 3300000,
		};

		static const unsigned int ldo_15_16_voltages[] = {
		1750000, 1800000, 2400000, 2600000,
		2700000, 2850000, 2950000, 3000000,
		};

		static const struct regulator_ops hi6421v530_ldo_ops;

		#define HI6421V530_LDO_ENABLE_TIME (350)

		/*
		* _id - LDO id name string
		* v_table - voltage table
		* vreg - voltage select register
		* vmask - voltage select mask
		* ereg - enable register
		* emask - enable mask
		* odelay - off/on delay time in uS
		* ecomask - eco mode mask
		* ecoamp - eco mode load uppler limit in uA
		*/
		#define HI6421V530_LDO(_ID, v_table, vreg, vmask, ereg, emask, \
		odelay, ecomask, ecoamp) { \
		.rdesc = { \
		.name = #_ID, \
		.of_match = of_match_ptr(#_ID), \
		.regulators_node = of_match_ptr("regulators"), \
		.ops = &hi6421v530_ldo_ops, \
		.type = REGULATOR_VOLTAGE, \
		.id = HI6421V530_##_ID, \
		.owner = THIS_MODULE, \
		.n_voltages = ARRAY_SIZE(v_table), \
		.volt_table = v_table, \
		.vsel_reg = HI6421_REG_TO_BUS_ADDR(vreg), \
		.vsel_mask = vmask, \
		.enable_reg = HI6421_REG_TO_BUS_ADDR(ereg), \
		.enable_mask = emask, \
		.enable_time = HI6421V530_LDO_ENABLE_TIME, \
		.off_on_delay = odelay, \
		}, \
		.mode_mask = ecomask, \
		.eco_microamp = ecoamp, \
		}

		/* HI6421V530 regulator information */

		static struct hi6421v530_regulator_info hi6421v530_regulator_info[] = {
		HI6421V530_LDO(LDO3, ldo_3_voltages, 0x061, 0xf, 0x060, 0x2,
		20000, 0x6, 8000),
		HI6421V530_LDO(LDO9, ldo_9_11_voltages, 0x06b, 0x7, 0x06a, 0x2,
		40000, 0x6, 8000),
		HI6421V530_LDO(LDO11, ldo_9_11_voltages, 0x06f, 0x7, 0x06e, 0x2,
		40000, 0x6, 8000),
		HI6421V530_LDO(LDO15, ldo_15_16_voltages, 0x077, 0x7, 0x076, 0x2,
		40000, 0x6, 8000),
		HI6421V530_LDO(LDO16, ldo_15_16_voltages, 0x079, 0x7, 0x078, 0x2,
		40000, 0x6, 8000),
		};

		static unsigned int hi6421v530_regulator_ldo_get_mode(
		struct regulator_dev *rdev)
		{
		struct hi6421v530_regulator_info *info;
		unsigned int reg_val;

		info = rdev_get_drvdata(rdev);
		regmap_read(rdev->regmap, rdev->desc->enable_reg, &reg_val);

		if (reg_val & (info->mode_mask))
		return REGULATOR_MODE_IDLE;

		return REGULATOR_MODE_NORMAL;
		}

		static int hi6421v530_regulator_ldo_set_mode(struct regulator_dev *rdev,
		unsigned int mode)
		{
		struct hi6421v530_regulator_info *info;
		unsigned int new_mode;

		info = rdev_get_drvdata(rdev);
		switch (mode) {
		case REGULATOR_MODE_NORMAL:
		new_mode = 0;
		break;
		case REGULATOR_MODE_IDLE:
		new_mode = info->mode_mask;
		break;
		default:
		return -EINVAL;
		}

		regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
		info->mode_mask, new_mode);

		return 0;
		}


		static const struct regulator_ops hi6421v530_ldo_ops = {
		.is_enabled = regulator_is_enabled_regmap,
		.enable = regulator_enable_regmap,
		.disable = regulator_disable_regmap,
		.list_voltage = regulator_list_voltage_table,
		.map_voltage = regulator_map_voltage_ascend,
		.get_voltage_sel = regulator_get_voltage_sel_regmap,
		.set_voltage_sel = regulator_set_voltage_sel_regmap,
		.get_mode = hi6421v530_regulator_ldo_get_mode,
		.set_mode = hi6421v530_regulator_ldo_set_mode,
		};

		static int hi6421v530_regulator_probe(struct platform_device *pdev)
		{
		struct hi6421_pmic *pmic;
		struct regulator_dev *rdev;
		struct regulator_config config = { };
		unsigned int i;

		pmic = dev_get_drvdata(pdev->dev.parent);
		if (!pmic) {
		dev_err(&pdev->dev, "no pmic in the regulator parent node\n");
		return -ENODEV;
		}

		for (i = 0; i < ARRAY_SIZE(hi6421v530_regulator_info); i++) {
		config.dev = pdev->dev.parent;
		config.regmap = pmic->regmap;
		config.driver_data = &hi6421v530_regulator_info[i];

		rdev = devm_regulator_register(&pdev->dev,
		&hi6421v530_regulator_info[i].rdesc,
		&config);
		if (IS_ERR(rdev)) {
		dev_err(&pdev->dev, "failed to register regulator %s\n",
		hi6421v530_regulator_info[i].rdesc.name);
		return PTR_ERR(rdev);
		}
		}
		return 0;
		}

		static struct platform_driver hi6421v530_regulator_driver = {
		.driver = {
		.name = "hi6421v530-regulator",
		},
		.probe = hi6421v530_regulator_probe,
		};
		module_platform_driver(hi6421v530_regulator_driver);

		MODULE_AUTHOR("Wang Xiaoyin <hw.wangxiaoyin@hisilicon.com>");
		MODULE_DESCRIPTION("Hi6421v530 regulator driver");
		MODULE_LICENSE("GPL v2");