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Release 4.14 drivers/regulator/mt6397-regulator.c

/*
 * Copyright (c) 2014 MediaTek Inc.
 * Author: Flora Fu <flora.fu@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.
 */

#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/mt6397/registers.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/mt6397-regulator.h>
#include <linux/regulator/of_regulator.h>


#define MT6397_BUCK_MODE_AUTO	0

#define MT6397_BUCK_MODE_FORCE_PWM	1

/*
 * MT6397 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 mt6397_regulator_info {
	
struct regulator_desc desc;
	
u32 qi;
	
u32 vselon_reg;
	
u32 vselctrl_reg;
	
u32 vselctrl_mask;
	
u32 modeset_reg;
	
u32 modeset_mask;
	
u32 modeset_shift;
};


#define MT6397_BUCK(match, vreg, min, max, step, volt_ranges, enreg,       \
		vosel, vosel_mask, voselon, vosel_ctrl, _modeset_reg,       \
		_modeset_shift)					\
[MT6397_ID_##vreg] = {                                                  \
        .desc = {                                                       \
                .name = #vreg,                                          \
                .of_match = of_match_ptr(match),                        \
                .ops = &mt6397_volt_range_ops,                          \
                .type = REGULATOR_VOLTAGE,                              \
                .id = MT6397_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),                                        \
        .modeset_reg = _modeset_reg,                                    \
        .modeset_mask = BIT(_modeset_shift),                            \
        .modeset_shift = _modeset_shift                                 \
}


#define MT6397_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel,       \
		vosel_mask)						\
[MT6397_ID_##vreg] = {                                                  \
        .desc = {                                                       \
                .name = #vreg,                                          \
                .of_match = of_match_ptr(match),                        \
                .ops = &mt6397_volt_table_ops,                          \
                .type = REGULATOR_VOLTAGE,                              \
                .id = MT6397_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),                                                  \
}


#define MT6397_REG_FIXED(match, vreg, enreg, enbit, volt)		\
[MT6397_ID_##vreg] = {                                                  \
        .desc = {                                                       \
                .name = #vreg,                                          \
                .of_match = of_match_ptr(match),                        \
                .ops = &mt6397_volt_fixed_ops,                          \
                .type = REGULATOR_VOLTAGE,                              \
                .id = MT6397_ID_##vreg,                                 \
                .owner = THIS_MODULE,                                   \
                .n_voltages = 1,                                        \
                .enable_reg = enreg,                                    \
                .enable_mask = BIT(enbit),                              \
                .min_uV = volt,                                         \
        },                                                              \
        .qi = BIT(15),                                                  \
}


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(800000, 0, 0x7f, 6250),
};


static const struct regulator_linear_range buck_volt_range3[] = {
	REGULATOR_LINEAR_RANGE(1500000, 0, 0x1f, 20000),
};


static const u32 ldo_volt_table1[] = {
	1500000, 1800000, 2500000, 2800000,
};


static const u32 ldo_volt_table2[] = {
	1800000, 3300000,
};


static const u32 ldo_volt_table3[] = {
	3000000, 3300000,
};


static const u32 ldo_volt_table4[] = {
	1220000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
};


static const u32 ldo_volt_table5[] = {
	1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
};


static const u32 ldo_volt_table5_v2[] = {
	1200000, 1000000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
};


static const u32 ldo_volt_table6[] = {
	1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 2000000,
};


static const u32 ldo_volt_table7[] = {
	1300000, 1500000, 1800000, 2000000, 2500000, 2800000, 3000000, 3300000,
};


static int mt6397_regulator_set_mode(struct regulator_dev *rdev, unsigned int mode) { struct mt6397_regulator_info *info = rdev_get_drvdata(rdev); int ret, val; switch (mode) { case REGULATOR_MODE_FAST: val = MT6397_BUCK_MODE_FORCE_PWM; break; case REGULATOR_MODE_NORMAL: val = MT6397_BUCK_MODE_AUTO; break; default: ret = -EINVAL; goto err_mode; } dev_dbg(&rdev->dev, "mt6397 buck set_mode %#x, %#x, %#x, %#x\n", info->modeset_reg, info->modeset_mask, info->modeset_shift, val); val <<= info->modeset_shift; ret = regmap_update_bits(rdev->regmap, info->modeset_reg, info->modeset_mask, val); err_mode: if (ret != 0) { dev_err(&rdev->dev, "Failed to set mt6397 buck mode: %d\n", ret); return ret; } return 0; }

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static unsigned int mt6397_regulator_get_mode(struct regulator_dev *rdev) { struct mt6397_regulator_info *info = rdev_get_drvdata(rdev); int ret, regval; ret = regmap_read(rdev->regmap, info->modeset_reg, &regval); if (ret != 0) { dev_err(&rdev->dev, "Failed to get mt6397 buck mode: %d\n", ret); return ret; } switch ((regval & info->modeset_mask) >> info->modeset_shift) { case MT6397_BUCK_MODE_AUTO: return REGULATOR_MODE_NORMAL; case MT6397_BUCK_MODE_FORCE_PWM: return REGULATOR_MODE_FAST; default: return -EINVAL; } }

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static int mt6397_get_status(struct regulator_dev *rdev) { int ret; u32 regval; struct mt6397_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; }

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static const struct regulator_ops mt6397_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 = mt6397_get_status, .set_mode = mt6397_regulator_set_mode, .get_mode = mt6397_regulator_get_mode, }; static const struct regulator_ops mt6397_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 = mt6397_get_status, }; static const struct regulator_ops mt6397_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 = mt6397_get_status, }; /* The array is indexed by id(MT6397_ID_XXX) */ static struct mt6397_regulator_info mt6397_regulators[] = { MT6397_BUCK("buck_vpca15", VPCA15, 700000, 1493750, 6250, buck_volt_range1, MT6397_VCA15_CON7, MT6397_VCA15_CON9, 0x7f, MT6397_VCA15_CON10, MT6397_VCA15_CON5, MT6397_VCA15_CON2, 11), MT6397_BUCK("buck_vpca7", VPCA7, 700000, 1493750, 6250, buck_volt_range1, MT6397_VPCA7_CON7, MT6397_VPCA7_CON9, 0x7f, MT6397_VPCA7_CON10, MT6397_VPCA7_CON5, MT6397_VPCA7_CON2, 8), MT6397_BUCK("buck_vsramca15", VSRAMCA15, 700000, 1493750, 6250, buck_volt_range1, MT6397_VSRMCA15_CON7, MT6397_VSRMCA15_CON9, 0x7f, MT6397_VSRMCA15_CON10, MT6397_VSRMCA15_CON5, MT6397_VSRMCA15_CON2, 8), MT6397_BUCK("buck_vsramca7", VSRAMCA7, 700000, 1493750, 6250, buck_volt_range1, MT6397_VSRMCA7_CON7, MT6397_VSRMCA7_CON9, 0x7f, MT6397_VSRMCA7_CON10, MT6397_VSRMCA7_CON5, MT6397_VSRMCA7_CON2, 8), MT6397_BUCK("buck_vcore", VCORE, 700000, 1493750, 6250, buck_volt_range1, MT6397_VCORE_CON7, MT6397_VCORE_CON9, 0x7f, MT6397_VCORE_CON10, MT6397_VCORE_CON5, MT6397_VCORE_CON2, 8), MT6397_BUCK("buck_vgpu", VGPU, 700000, 1493750, 6250, buck_volt_range1, MT6397_VGPU_CON7, MT6397_VGPU_CON9, 0x7f, MT6397_VGPU_CON10, MT6397_VGPU_CON5, MT6397_VGPU_CON2, 8), MT6397_BUCK("buck_vdrm", VDRM, 800000, 1593750, 6250, buck_volt_range2, MT6397_VDRM_CON7, MT6397_VDRM_CON9, 0x7f, MT6397_VDRM_CON10, MT6397_VDRM_CON5, MT6397_VDRM_CON2, 8), MT6397_BUCK("buck_vio18", VIO18, 1500000, 2120000, 20000, buck_volt_range3, MT6397_VIO18_CON7, MT6397_VIO18_CON9, 0x1f, MT6397_VIO18_CON10, MT6397_VIO18_CON5, MT6397_VIO18_CON2, 8), MT6397_REG_FIXED("ldo_vtcxo", VTCXO, MT6397_ANALDO_CON0, 10, 2800000), MT6397_REG_FIXED("ldo_va28", VA28, MT6397_ANALDO_CON1, 14, 2800000), MT6397_LDO("ldo_vcama", VCAMA, ldo_volt_table1, MT6397_ANALDO_CON2, 15, MT6397_ANALDO_CON6, 0xC0), MT6397_REG_FIXED("ldo_vio28", VIO28, MT6397_DIGLDO_CON0, 14, 2800000), MT6397_REG_FIXED("ldo_vusb", VUSB, MT6397_DIGLDO_CON1, 14, 3300000), MT6397_LDO("ldo_vmc", VMC, ldo_volt_table2, MT6397_DIGLDO_CON2, 12, MT6397_DIGLDO_CON29, 0x10), MT6397_LDO("ldo_vmch", VMCH, ldo_volt_table3, MT6397_DIGLDO_CON3, 14, MT6397_DIGLDO_CON17, 0x80), MT6397_LDO("ldo_vemc3v3", VEMC3V3, ldo_volt_table3, MT6397_DIGLDO_CON4, 14, MT6397_DIGLDO_CON18, 0x10), MT6397_LDO("ldo_vgp1", VGP1, ldo_volt_table4, MT6397_DIGLDO_CON5, 15, MT6397_DIGLDO_CON19, 0xE0), MT6397_LDO("ldo_vgp2", VGP2, ldo_volt_table5, MT6397_DIGLDO_CON6, 15, MT6397_DIGLDO_CON20, 0xE0), MT6397_LDO("ldo_vgp3", VGP3, ldo_volt_table5, MT6397_DIGLDO_CON7, 15, MT6397_DIGLDO_CON21, 0xE0), MT6397_LDO("ldo_vgp4", VGP4, ldo_volt_table5, MT6397_DIGLDO_CON8, 15, MT6397_DIGLDO_CON22, 0xE0), MT6397_LDO("ldo_vgp5", VGP5, ldo_volt_table6, MT6397_DIGLDO_CON9, 15, MT6397_DIGLDO_CON23, 0xE0), MT6397_LDO("ldo_vgp6", VGP6, ldo_volt_table5, MT6397_DIGLDO_CON10, 15, MT6397_DIGLDO_CON33, 0xE0), MT6397_LDO("ldo_vibr", VIBR, ldo_volt_table7, MT6397_DIGLDO_CON24, 15, MT6397_DIGLDO_CON25, 0xE00), };
static int mt6397_set_buck_vosel_reg(struct platform_device *pdev) { struct mt6397_chip *mt6397 = dev_get_drvdata(pdev->dev.parent); int i; u32 regval; for (i = 0; i < MT6397_MAX_REGULATOR; i++) { if (mt6397_regulators[i].vselctrl_reg) { if (regmap_read(mt6397->regmap, mt6397_regulators[i].vselctrl_reg, &regval) < 0) { dev_err(&pdev->dev, "Failed to read buck ctrl\n"); return -EIO; } if (regval & mt6397_regulators[i].vselctrl_mask) { mt6397_regulators[i].desc.vsel_reg = mt6397_regulators[i].vselon_reg; } } } return 0; }

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static int mt6397_regulator_probe(struct platform_device *pdev) { struct mt6397_chip *mt6397 = dev_get_drvdata(pdev->dev.parent); struct regulator_config config = {}; struct regulator_dev *rdev; int i; u32 reg_value, version; /* Query buck controller to select activated voltage register part */ if (mt6397_set_buck_vosel_reg(pdev)) return -EIO; /* Read PMIC chip revision to update constraints and voltage table */ if (regmap_read(mt6397->regmap, MT6397_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); version = (reg_value & 0xFF); switch (version) { case MT6397_REGULATOR_ID91: mt6397_regulators[MT6397_ID_VGP2].desc.volt_table = ldo_volt_table5_v2; break; default: break; } for (i = 0; i < MT6397_MAX_REGULATOR; i++) { config.dev = &pdev->dev; config.driver_data = &mt6397_regulators[i]; config.regmap = mt6397->regmap; rdev = devm_regulator_register(&pdev->dev, &mt6397_regulators[i].desc, &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register %s\n", mt6397_regulators[i].desc.name); return PTR_ERR(rdev); } } return 0; }

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static const struct platform_device_id mt6397_platform_ids[] = { {"mt6397-regulator", 0}, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(platform, mt6397_platform_ids); static const struct of_device_id mt6397_of_match[] = { { .compatible = "mediatek,mt6397-regulator", }, { /* sentinel */ }, }; MODULE_DEVICE_TABLE(of, mt6397_of_match); static struct platform_driver mt6397_regulator_driver = { .driver = { .name = "mt6397-regulator", .of_match_table = of_match_ptr(mt6397_of_match), }, .probe = mt6397_regulator_probe, .id_table = mt6397_platform_ids, }; module_platform_driver(mt6397_regulator_driver); MODULE_AUTHOR("Flora Fu <flora.fu@mediatek.com>"); MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6397 PMIC"); MODULE_LICENSE("GPL");

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