/*
* 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>
/*
* 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;
};
#define MT6397_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \
vosel, vosel_mask, voselon, vosel_ctrl) \
[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), \
}
#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_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, ®val);
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 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,
};
static 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 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_BUCK("buck_vpca7", VPCA7, 700000, 1493750, 6250,
buck_volt_range1, MT6397_VPCA7_CON7, MT6397_VPCA7_CON9, 0x7f,
MT6397_VPCA7_CON10, MT6397_VPCA7_CON5),
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_BUCK("buck_vsramca7", VSRAMCA7, 700000, 1493750, 6250,
buck_volt_range1, MT6397_VSRMCA7_CON7, MT6397_VSRMCA7_CON9,
0x7f, MT6397_VSRMCA7_CON10, MT6397_VSRMCA7_CON5),
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_BUCK("buck_vgpu", VGPU, 700000, 1493750, 6250, buck_volt_range1,
MT6397_VGPU_CON7, MT6397_VGPU_CON9, 0x7f,
MT6397_VGPU_CON10, MT6397_VGPU_CON5),
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_BUCK("buck_vio18", VIO18, 1500000, 2120000, 20000,
buck_volt_range3, MT6397_VIO18_CON7, MT6397_VIO18_CON9, 0x1f,
MT6397_VIO18_CON10, MT6397_VIO18_CON5),
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,
®val) < 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;
}
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, ®_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;
}
static struct platform_driver mt6397_regulator_driver = {
.driver = {
.name = "mt6397-regulator",
},
.probe = mt6397_regulator_probe,
};
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");
MODULE_ALIAS("platform:mt6397-regulator");