Commit 2fdf8292 authored by Chen Zhong's avatar Chen Zhong Committed by Mark Brown
Browse files

regulator: mt6323: Add support for MT6323 regulator 



The MT6323 is a regulator found on boards based on MediaTek MT7623 and
probably other SoCs. It is a so called pmic and connects as a slave to
SoC using SPI, wrapped inside the pmic-wrapper.

Signed-off-by: default avatarChen Zhong <chen.zhong@mediatek.com>
Signed-off-by: default avatarJohn Crispin <john@phrozen.org>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent d236b3ee

drivers/regulator/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -498,6 +498,15 @@ config REGULATOR_MT6311 
	  This driver supports the control of different power rails of device

	  through regulator interface.



config REGULATOR_MT6323

	tristate "MediaTek MT6323 PMIC"

	depends on MFD_MT6397

	help

	  Say y here to select this option to enable the power regulator of

	  MediaTek MT6323 PMIC.

	  This driver supports the control of different power rails of device

	  through regulator interface.



config REGULATOR_MT6397

	tristate "MediaTek MT6397 PMIC"

	depends on MFD_MT6397

drivers/regulator/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -65,6 +65,7 @@ obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o 
obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o

obj-$(CONFIG_REGULATOR_MC13XXX_CORE) +=  mc13xxx-regulator-core.o

obj-$(CONFIG_REGULATOR_MT6311) += mt6311-regulator.o

obj-$(CONFIG_REGULATOR_MT6323)	+= mt6323-regulator.o

obj-$(CONFIG_REGULATOR_MT6397)	+= mt6397-regulator.o

obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o

obj-$(CONFIG_REGULATOR_QCOM_SMD_RPM) += qcom_smd-regulator.o

drivers/regulator/mt6323-regulator.c

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/*

 * Copyright (c) 2016 MediaTek Inc.

 * Author: Chen Zhong <chen.zhong@mediatek.com>

 *

 * 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/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/regmap.h>

#include <linux/mfd/mt6397/core.h>

#include <linux/mfd/mt6323/registers.h>

#include <linux/regulator/driver.h>

#include <linux/regulator/machine.h>

#include <linux/regulator/mt6323-regulator.h>

#include <linux/regulator/of_regulator.h>



#define MT6323_LDO_MODE_NORMAL	0

#define MT6323_LDO_MODE_LP	1



/*

 * MT6323 regulators' information

 *

 * @desc: standard fields of regulator description.

 * @qi: Mask for query enable signal status of regulators

 * @vselon_reg: Register sections for hardware control mode of bucks

 * @vselctrl_reg: Register for controlling the buck control mode.

 * @vselctrl_mask: Mask for query buck's voltage control mode.

 */

struct mt6323_regulator_info {

	struct regulator_desc desc;

	u32 qi;

	u32 vselon_reg;

	u32 vselctrl_reg;

	u32 vselctrl_mask;

	u32 modeset_reg;

	u32 modeset_mask;

};



#define MT6323_BUCK(match, vreg, min, max, step, volt_ranges, enreg,	\

		vosel, vosel_mask, voselon, vosel_ctrl)			\

[MT6323_ID_##vreg] = {							\

	.desc = {							\

		.name = #vreg,						\

		.of_match = of_match_ptr(match),			\

		.ops = &mt6323_volt_range_ops,				\

		.type = REGULATOR_VOLTAGE,				\

		.id = MT6323_ID_##vreg,					\

		.owner = THIS_MODULE,					\

		.n_voltages = (max - min)/step + 1,			\

		.linear_ranges = volt_ranges,				\

		.n_linear_ranges = ARRAY_SIZE(volt_ranges),		\

		.vsel_reg = vosel,					\

		.vsel_mask = vosel_mask,				\

		.enable_reg = enreg,					\

		.enable_mask = BIT(0),					\

	},								\

	.qi = BIT(13),							\

	.vselon_reg = voselon,						\

	.vselctrl_reg = vosel_ctrl,					\

	.vselctrl_mask = BIT(1),					\

}



#define MT6323_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel,	\

		vosel_mask, _modeset_reg, _modeset_mask)		\

[MT6323_ID_##vreg] = {							\

	.desc = {							\

		.name = #vreg,						\

		.of_match = of_match_ptr(match),			\

		.ops = &mt6323_volt_table_ops,				\

		.type = REGULATOR_VOLTAGE,				\

		.id = MT6323_ID_##vreg,					\

		.owner = THIS_MODULE,					\

		.n_voltages = ARRAY_SIZE(ldo_volt_table),		\

		.volt_table = ldo_volt_table,				\

		.vsel_reg = vosel,					\

		.vsel_mask = vosel_mask,				\

		.enable_reg = enreg,					\

		.enable_mask = BIT(enbit),				\

	},								\

	.qi = BIT(15),							\

	.modeset_reg = _modeset_reg,					\

	.modeset_mask = _modeset_mask,					\

}



#define MT6323_REG_FIXED(match, vreg, enreg, enbit, volt,		\

		_modeset_reg, _modeset_mask)				\

[MT6323_ID_##vreg] = {							\

	.desc = {							\

		.name = #vreg,						\

		.of_match = of_match_ptr(match),			\

		.ops = &mt6323_volt_fixed_ops,				\

		.type = REGULATOR_VOLTAGE,				\

		.id = MT6323_ID_##vreg,					\

		.owner = THIS_MODULE,					\

		.n_voltages = 1,					\

		.enable_reg = enreg,					\

		.enable_mask = BIT(enbit),				\

		.min_uV = volt,						\

	},								\

	.qi = BIT(15),							\

	.modeset_reg = _modeset_reg,					\

	.modeset_mask = _modeset_mask,					\

}



static const struct regulator_linear_range buck_volt_range1[] = {

	REGULATOR_LINEAR_RANGE(700000, 0, 0x7f, 6250),

};



static const struct regulator_linear_range buck_volt_range2[] = {

	REGULATOR_LINEAR_RANGE(1400000, 0, 0x7f, 12500),

};



static const struct regulator_linear_range buck_volt_range3[] = {

	REGULATOR_LINEAR_RANGE(500000, 0, 0x3f, 50000),

};



static const u32 ldo_volt_table1[] = {

	3300000, 3400000, 3500000, 3600000,

};



static const u32 ldo_volt_table2[] = {

	1500000, 1800000, 2500000, 2800000,

};



static const u32 ldo_volt_table3[] = {

	1800000, 3300000,

};



static const u32 ldo_volt_table4[] = {

	3000000, 3300000,

};



static const u32 ldo_volt_table5[] = {

	1200000, 1300000, 1500000, 1800000, 2000000, 2800000, 3000000, 3300000,

};



static const u32 ldo_volt_table6[] = {

	1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 2000000,

};



static const u32 ldo_volt_table7[] = {

	1200000, 1300000, 1500000, 1800000,

};



static const u32 ldo_volt_table8[] = {

	1800000, 3000000,

};



static const u32 ldo_volt_table9[] = {

	1200000, 1350000, 1500000, 1800000,

};



static const u32 ldo_volt_table10[] = {

	1200000, 1300000, 1500000, 1800000,

};



static int mt6323_get_status(struct regulator_dev *rdev)

{

	int ret;

	u32 regval;

	struct mt6323_regulator_info *info = rdev_get_drvdata(rdev);



	ret = regmap_read(rdev->regmap, info->desc.enable_reg, &regval);

	if (ret != 0) {

		dev_err(&rdev->dev, "Failed to get enable reg: %d\n", ret);

		return ret;

	}



	return (regval & info->qi) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF;

}



static int mt6323_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)

{

	int ret, val = 0;

	struct mt6323_regulator_info *info = rdev_get_drvdata(rdev);



	if (!info->modeset_mask) {

		dev_err(&rdev->dev, "regulator %s doesn't support set_mode\n",

			info->desc.name);

		return -EINVAL;

	}



	switch (mode) {

	case REGULATOR_MODE_STANDBY:

		val = MT6323_LDO_MODE_LP;

		break;

	case REGULATOR_MODE_NORMAL:

		val = MT6323_LDO_MODE_NORMAL;

		break;

	default:

		return -EINVAL;

	}



	val <<= ffs(info->modeset_mask) - 1;



	ret = regmap_update_bits(rdev->regmap, info->modeset_reg,

				  info->modeset_mask, val);



	return ret;

}



static unsigned int mt6323_ldo_get_mode(struct regulator_dev *rdev)

{

	unsigned int val;

	unsigned int mode;

	int ret;

	struct mt6323_regulator_info *info = rdev_get_drvdata(rdev);



	if (!info->modeset_mask) {

		dev_err(&rdev->dev, "regulator %s doesn't support get_mode\n",

			info->desc.name);

		return -EINVAL;

	}



	ret = regmap_read(rdev->regmap, info->modeset_reg, &val);

	if (ret < 0)

		return ret;



	val &= info->modeset_mask;

	val >>= ffs(info->modeset_mask) - 1;



	if (val & 0x1)

		mode = REGULATOR_MODE_STANDBY;

	else

		mode = REGULATOR_MODE_NORMAL;



	return mode;

}



static struct regulator_ops mt6323_volt_range_ops = {

	.list_voltage = regulator_list_voltage_linear_range,

	.map_voltage = regulator_map_voltage_linear_range,

	.set_voltage_sel = regulator_set_voltage_sel_regmap,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,

	.set_voltage_time_sel = regulator_set_voltage_time_sel,

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.is_enabled = regulator_is_enabled_regmap,

	.get_status = mt6323_get_status,

};



static struct regulator_ops mt6323_volt_table_ops = {

	.list_voltage = regulator_list_voltage_table,

	.map_voltage = regulator_map_voltage_iterate,

	.set_voltage_sel = regulator_set_voltage_sel_regmap,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,

	.set_voltage_time_sel = regulator_set_voltage_time_sel,

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.is_enabled = regulator_is_enabled_regmap,

	.get_status = mt6323_get_status,

	.set_mode = mt6323_ldo_set_mode,

	.get_mode = mt6323_ldo_get_mode,

};



static struct regulator_ops mt6323_volt_fixed_ops = {

	.list_voltage = regulator_list_voltage_linear,

	.enable = regulator_enable_regmap,

	.disable = regulator_disable_regmap,

	.is_enabled = regulator_is_enabled_regmap,

	.get_status = mt6323_get_status,

	.set_mode = mt6323_ldo_set_mode,

	.get_mode = mt6323_ldo_get_mode,

};



/* The array is indexed by id(MT6323_ID_XXX) */

static struct mt6323_regulator_info mt6323_regulators[] = {

	MT6323_BUCK("buck_vproc", VPROC, 700000, 1493750, 6250,

		buck_volt_range1, MT6323_VPROC_CON7, MT6323_VPROC_CON9, 0x7f,

		MT6323_VPROC_CON10, MT6323_VPROC_CON5),

	MT6323_BUCK("buck_vsys", VSYS, 1400000, 2987500, 12500,

		buck_volt_range2, MT6323_VSYS_CON7, MT6323_VSYS_CON9, 0x7f,

		MT6323_VSYS_CON10, MT6323_VSYS_CON5),

	MT6323_BUCK("buck_vpa", VPA, 500000, 3650000, 50000,

		buck_volt_range3, MT6323_VPA_CON7, MT6323_VPA_CON9,

		0x3f, MT6323_VPA_CON10, MT6323_VPA_CON5),

	MT6323_REG_FIXED("ldo_vtcxo", VTCXO, MT6323_ANALDO_CON1, 10, 2800000,

		MT6323_ANALDO_CON1, 0x2),

	MT6323_REG_FIXED("ldo_vcn28", VCN28, MT6323_ANALDO_CON19, 12, 2800000,

		MT6323_ANALDO_CON20, 0x2),

	MT6323_LDO("ldo_vcn33_bt", VCN33_BT, ldo_volt_table1,

		MT6323_ANALDO_CON16, 7, MT6323_ANALDO_CON16, 0xC,

		MT6323_ANALDO_CON21, 0x2),

	MT6323_LDO("ldo_vcn33_wifi", VCN33_WIFI, ldo_volt_table1,

		MT6323_ANALDO_CON17, 12, MT6323_ANALDO_CON16, 0xC,

		MT6323_ANALDO_CON21, 0x2),

	MT6323_REG_FIXED("ldo_va", VA, MT6323_ANALDO_CON2, 14, 2800000,

		MT6323_ANALDO_CON2, 0x2),

	MT6323_LDO("ldo_vcama", VCAMA, ldo_volt_table2,

		MT6323_ANALDO_CON4, 15, MT6323_ANALDO_CON10, 0x60, -1, 0),

	MT6323_REG_FIXED("ldo_vio28", VIO28, MT6323_DIGLDO_CON0, 14, 2800000,

		MT6323_DIGLDO_CON0, 0x2),

	MT6323_REG_FIXED("ldo_vusb", VUSB, MT6323_DIGLDO_CON2, 14, 3300000,

		MT6323_DIGLDO_CON2, 0x2),

	MT6323_LDO("ldo_vmc", VMC, ldo_volt_table3,

		MT6323_DIGLDO_CON3, 12, MT6323_DIGLDO_CON24, 0x10,

		MT6323_DIGLDO_CON3, 0x2),

	MT6323_LDO("ldo_vmch", VMCH, ldo_volt_table4,

		MT6323_DIGLDO_CON5, 14, MT6323_DIGLDO_CON26, 0x80,

		MT6323_DIGLDO_CON5, 0x2),

	MT6323_LDO("ldo_vemc3v3", VEMC3V3, ldo_volt_table4,

		MT6323_DIGLDO_CON6, 14, MT6323_DIGLDO_CON27, 0x80,

		MT6323_DIGLDO_CON6, 0x2),

	MT6323_LDO("ldo_vgp1", VGP1, ldo_volt_table5,

		MT6323_DIGLDO_CON7, 15, MT6323_DIGLDO_CON28, 0xE0,

		MT6323_DIGLDO_CON7, 0x2),

	MT6323_LDO("ldo_vgp2", VGP2, ldo_volt_table6,

		MT6323_DIGLDO_CON8, 15, MT6323_DIGLDO_CON29, 0xE0,

		MT6323_DIGLDO_CON8, 0x2),

	MT6323_LDO("ldo_vgp3", VGP3, ldo_volt_table7,

		MT6323_DIGLDO_CON9, 15, MT6323_DIGLDO_CON30, 0x60,

		MT6323_DIGLDO_CON9, 0x2),

	MT6323_REG_FIXED("ldo_vcn18", VCN18, MT6323_DIGLDO_CON11, 14, 1800000,

		MT6323_DIGLDO_CON11, 0x2),

	MT6323_LDO("ldo_vsim1", VSIM1, ldo_volt_table8,

		MT6323_DIGLDO_CON13, 15, MT6323_DIGLDO_CON34, 0x20,

		MT6323_DIGLDO_CON13, 0x2),

	MT6323_LDO("ldo_vsim2", VSIM2, ldo_volt_table8,

		MT6323_DIGLDO_CON14, 15, MT6323_DIGLDO_CON35, 0x20,

		MT6323_DIGLDO_CON14, 0x2),

	MT6323_REG_FIXED("ldo_vrtc", VRTC, MT6323_DIGLDO_CON15, 8, 2800000,

		-1, 0),

	MT6323_LDO("ldo_vcamaf", VCAMAF, ldo_volt_table5,

		MT6323_DIGLDO_CON31, 15, MT6323_DIGLDO_CON32, 0xE0,

		MT6323_DIGLDO_CON31, 0x2),

	MT6323_LDO("ldo_vibr", VIBR, ldo_volt_table5,

		MT6323_DIGLDO_CON39, 15, MT6323_DIGLDO_CON40, 0xE0,

		MT6323_DIGLDO_CON39, 0x2),

	MT6323_REG_FIXED("ldo_vrf18", VRF18, MT6323_DIGLDO_CON45, 15, 1825000,

		MT6323_DIGLDO_CON45, 0x2),

	MT6323_LDO("ldo_vm", VM, ldo_volt_table9,

		MT6323_DIGLDO_CON47, 14, MT6323_DIGLDO_CON48, 0x30,

		MT6323_DIGLDO_CON47, 0x2),

	MT6323_REG_FIXED("ldo_vio18", VIO18, MT6323_DIGLDO_CON49, 14, 1800000,

		MT6323_DIGLDO_CON49, 0x2),

	MT6323_LDO("ldo_vcamd", VCAMD, ldo_volt_table10,

		MT6323_DIGLDO_CON51, 14, MT6323_DIGLDO_CON52, 0x60,

		MT6323_DIGLDO_CON51, 0x2),

	MT6323_REG_FIXED("ldo_vcamio", VCAMIO, MT6323_DIGLDO_CON53, 14, 1800000,

		MT6323_DIGLDO_CON53, 0x2),

};



static int mt6323_set_buck_vosel_reg(struct platform_device *pdev)

{

	struct mt6397_chip *mt6323 = dev_get_drvdata(pdev->dev.parent);

	int i;

	u32 regval;



	for (i = 0; i < MT6323_MAX_REGULATOR; i++) {

		if (mt6323_regulators[i].vselctrl_reg) {

			if (regmap_read(mt6323->regmap,

				mt6323_regulators[i].vselctrl_reg,

				&regval) < 0) {

				dev_err(&pdev->dev,

					"Failed to read buck ctrl\n");

				return -EIO;

			}



			if (regval & mt6323_regulators[i].vselctrl_mask) {

				mt6323_regulators[i].desc.vsel_reg =

				mt6323_regulators[i].vselon_reg;

			}

		}

	}



	return 0;

}



static int mt6323_regulator_probe(struct platform_device *pdev)

{

	struct mt6397_chip *mt6323 = dev_get_drvdata(pdev->dev.parent);

	struct regulator_config config = {};

	struct regulator_dev *rdev;

	int i;

	u32 reg_value;



	/* Query buck controller to select activated voltage register part */

	if (mt6323_set_buck_vosel_reg(pdev))

		return -EIO;



	/* Read PMIC chip revision to update constraints and voltage table */

	if (regmap_read(mt6323->regmap, MT6323_CID, &reg_value) < 0) {

		dev_err(&pdev->dev, "Failed to read Chip ID\n");

		return -EIO;

	}

	dev_info(&pdev->dev, "Chip ID = 0x%x\n", reg_value);



	for (i = 0; i < MT6323_MAX_REGULATOR; i++) {

		config.dev = &pdev->dev;

		config.driver_data = &mt6323_regulators[i];

		config.regmap = mt6323->regmap;

		rdev = devm_regulator_register(&pdev->dev,

				&mt6323_regulators[i].desc, &config);

		if (IS_ERR(rdev)) {

			dev_err(&pdev->dev, "failed to register %s\n",

				mt6323_regulators[i].desc.name);

			return PTR_ERR(rdev);

		}

	}

	return 0;

}



static const struct platform_device_id mt6323_platform_ids[] = {

	{"mt6323-regulator", 0},

	{ /* sentinel */ },

};

MODULE_DEVICE_TABLE(platform, mt6323_platform_ids);



static struct platform_driver mt6323_regulator_driver = {

	.driver = {

		.name = "mt6323-regulator",

	},

	.probe = mt6323_regulator_probe,

	.id_table = mt6323_platform_ids,

};



module_platform_driver(mt6323_regulator_driver);



MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>");

MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6397 PMIC");

MODULE_LICENSE("GPL v2");

include/linux/regulator/mt6323-regulator.h

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Original line number Diff line number Diff line 
/*

 * Copyright (c) 2016 MediaTek Inc.

 * Author: Chen Zhong <chen.zhong@mediatek.com>

 *

 * 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.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 */



#ifndef __LINUX_REGULATOR_MT6323_H

#define __LINUX_REGULATOR_MT6323_H



enum {

	MT6323_ID_VPROC = 0,

	MT6323_ID_VSYS,

	MT6323_ID_VPA,

	MT6323_ID_VTCXO,

	MT6323_ID_VCN28,

	MT6323_ID_VCN33_BT,

	MT6323_ID_VCN33_WIFI,

	MT6323_ID_VA,

	MT6323_ID_VCAMA,

	MT6323_ID_VIO28 = 9,

	MT6323_ID_VUSB,

	MT6323_ID_VMC,

	MT6323_ID_VMCH,

	MT6323_ID_VEMC3V3,

	MT6323_ID_VGP1,

	MT6323_ID_VGP2,

	MT6323_ID_VGP3,

	MT6323_ID_VCN18,

	MT6323_ID_VSIM1,

	MT6323_ID_VSIM2,

	MT6323_ID_VRTC,

	MT6323_ID_VCAMAF,

	MT6323_ID_VIBR,

	MT6323_ID_VRF18,

	MT6323_ID_VM,

	MT6323_ID_VIO18,

	MT6323_ID_VCAMD,

	MT6323_ID_VCAMIO,

	MT6323_ID_RG_MAX,

};



#define MT6323_MAX_REGULATOR	MT6323_ID_RG_MAX



#endif /* __LINUX_REGULATOR_MT6323_H */

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