508 lines
17 KiB
C
508 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Copyright (c) 2022 Collabora Ltd.
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// Author: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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//
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// Based on mt6323-regulator.c,
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// Copyright (c) 2016 MediaTek Inc.
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//
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/mt6397/core.h>
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#include <linux/mfd/mt6331/registers.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/mt6331-regulator.h>
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#include <linux/regulator/of_regulator.h>
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#define MT6331_LDO_MODE_NORMAL 0
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#define MT6331_LDO_MODE_LP 1
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/*
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* MT6331 regulators information
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*
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* @desc: standard fields of regulator description.
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* @qi: Mask for query enable signal status of regulators
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* @vselon_reg: Register sections for hardware control mode of bucks
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* @vselctrl_reg: Register for controlling the buck control mode.
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* @vselctrl_mask: Mask for query buck's voltage control mode.
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* @status_reg: Register for regulator enable status where qi unavailable
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* @status_mask: Mask for querying regulator enable status
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*/
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struct mt6331_regulator_info {
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struct regulator_desc desc;
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u32 qi;
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u32 vselon_reg;
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u32 vselctrl_reg;
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u32 vselctrl_mask;
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u32 modeset_reg;
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u32 modeset_mask;
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u32 status_reg;
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u32 status_mask;
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};
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#define MT6331_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \
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vosel, vosel_mask, voselon, vosel_ctrl) \
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[MT6331_ID_##vreg] = { \
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.desc = { \
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.name = #vreg, \
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.of_match = of_match_ptr(match), \
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.ops = &mt6331_volt_range_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = MT6331_ID_##vreg, \
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.owner = THIS_MODULE, \
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.n_voltages = (max - min)/step + 1, \
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.linear_ranges = volt_ranges, \
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.n_linear_ranges = ARRAY_SIZE(volt_ranges), \
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.vsel_reg = vosel, \
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.vsel_mask = vosel_mask, \
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.enable_reg = enreg, \
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.enable_mask = BIT(0), \
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}, \
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.qi = BIT(13), \
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.vselon_reg = voselon, \
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.vselctrl_reg = vosel_ctrl, \
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.vselctrl_mask = BIT(1), \
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.status_mask = 0, \
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}
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#define MT6331_LDO_AO(match, vreg, ldo_volt_table, vosel, vosel_mask) \
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[MT6331_ID_##vreg] = { \
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.desc = { \
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.name = #vreg, \
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.of_match = of_match_ptr(match), \
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.ops = &mt6331_volt_table_ao_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = MT6331_ID_##vreg, \
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.owner = THIS_MODULE, \
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.n_voltages = ARRAY_SIZE(ldo_volt_table), \
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.volt_table = ldo_volt_table, \
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.vsel_reg = vosel, \
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.vsel_mask = vosel_mask, \
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}, \
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}
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#define MT6331_LDO_S(match, vreg, ldo_volt_table, enreg, enbit, vosel, \
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vosel_mask, _modeset_reg, _modeset_mask, \
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_status_reg, _status_mask) \
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[MT6331_ID_##vreg] = { \
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.desc = { \
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.name = #vreg, \
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.of_match = of_match_ptr(match), \
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.ops = &mt6331_volt_table_no_qi_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = MT6331_ID_##vreg, \
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.owner = THIS_MODULE, \
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.n_voltages = ARRAY_SIZE(ldo_volt_table), \
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.volt_table = ldo_volt_table, \
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.vsel_reg = vosel, \
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.vsel_mask = vosel_mask, \
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.enable_reg = enreg, \
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.enable_mask = BIT(enbit), \
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}, \
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.modeset_reg = _modeset_reg, \
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.modeset_mask = _modeset_mask, \
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.status_reg = _status_reg, \
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.status_mask = _status_mask, \
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}
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#define MT6331_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel, \
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vosel_mask, _modeset_reg, _modeset_mask) \
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[MT6331_ID_##vreg] = { \
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.desc = { \
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.name = #vreg, \
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.of_match = of_match_ptr(match), \
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.ops = (_modeset_reg ? \
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&mt6331_volt_table_ops : \
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&mt6331_volt_table_no_ms_ops), \
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.type = REGULATOR_VOLTAGE, \
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.id = MT6331_ID_##vreg, \
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.owner = THIS_MODULE, \
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.n_voltages = ARRAY_SIZE(ldo_volt_table), \
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.volt_table = ldo_volt_table, \
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.vsel_reg = vosel, \
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.vsel_mask = vosel_mask, \
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.enable_reg = enreg, \
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.enable_mask = BIT(enbit), \
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}, \
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.qi = BIT(15), \
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.modeset_reg = _modeset_reg, \
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.modeset_mask = _modeset_mask, \
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}
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#define MT6331_REG_FIXED(match, vreg, enreg, enbit, qibit, volt, \
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_modeset_reg, _modeset_mask) \
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[MT6331_ID_##vreg] = { \
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.desc = { \
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.name = #vreg, \
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.of_match = of_match_ptr(match), \
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.ops = (_modeset_reg ? \
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&mt6331_volt_fixed_ops : \
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&mt6331_volt_fixed_no_ms_ops), \
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.type = REGULATOR_VOLTAGE, \
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.id = MT6331_ID_##vreg, \
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.owner = THIS_MODULE, \
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.n_voltages = 1, \
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.enable_reg = enreg, \
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.enable_mask = BIT(enbit), \
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.min_uV = volt, \
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}, \
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.qi = BIT(qibit), \
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.modeset_reg = _modeset_reg, \
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.modeset_mask = _modeset_mask, \
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}
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static const struct linear_range buck_volt_range[] = {
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REGULATOR_LINEAR_RANGE(700000, 0, 0x7f, 6250),
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};
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static const unsigned int ldo_volt_table1[] = {
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2800000, 3000000, 0, 3200000
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};
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static const unsigned int ldo_volt_table2[] = {
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1500000, 1800000, 2500000, 2800000,
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};
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static const unsigned int ldo_volt_table3[] = {
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1200000, 1300000, 1500000, 1800000, 2000000, 2800000, 3000000, 3300000,
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};
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static const unsigned int ldo_volt_table4[] = {
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0, 0, 1700000, 1800000, 1860000, 2760000, 3000000, 3100000,
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};
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static const unsigned int ldo_volt_table5[] = {
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1800000, 3300000, 1800000, 3300000,
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};
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static const unsigned int ldo_volt_table6[] = {
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3000000, 3300000,
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};
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static const unsigned int ldo_volt_table7[] = {
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1200000, 1600000, 1700000, 1800000, 1900000, 2000000, 2100000, 2200000,
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};
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static const unsigned int ldo_volt_table8[] = {
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900000, 1000000, 1100000, 1220000, 1300000, 1500000, 1500000, 1500000,
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};
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static const unsigned int ldo_volt_table9[] = {
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1000000, 1050000, 1100000, 1150000, 1200000, 1250000, 1300000, 1300000,
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};
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static const unsigned int ldo_volt_table10[] = {
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1200000, 1300000, 1500000, 1800000,
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};
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static const unsigned int ldo_volt_table11[] = {
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1200000, 1300000, 1400000, 1500000, 1600000, 1700000, 1800000, 1800000,
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};
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static int mt6331_get_status(struct regulator_dev *rdev)
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{
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struct mt6331_regulator_info *info = rdev_get_drvdata(rdev);
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u32 regval;
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int ret;
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ret = regmap_read(rdev->regmap, info->desc.enable_reg, ®val);
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if (ret != 0) {
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dev_err(&rdev->dev, "Failed to get enable reg: %d\n", ret);
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return ret;
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}
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return (regval & info->qi) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF;
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}
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static int mt6331_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode)
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{
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struct mt6331_regulator_info *info = rdev_get_drvdata(rdev);
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int val;
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switch (mode) {
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case REGULATOR_MODE_STANDBY:
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val = MT6331_LDO_MODE_LP;
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break;
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case REGULATOR_MODE_NORMAL:
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val = MT6331_LDO_MODE_NORMAL;
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break;
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default:
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return -EINVAL;
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}
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val <<= ffs(info->modeset_mask) - 1;
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return regmap_update_bits(rdev->regmap, info->modeset_reg,
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info->modeset_mask, val);
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}
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static unsigned int mt6331_ldo_get_mode(struct regulator_dev *rdev)
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{
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struct mt6331_regulator_info *info = rdev_get_drvdata(rdev);
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unsigned int val;
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int ret;
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ret = regmap_read(rdev->regmap, info->modeset_reg, &val);
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if (ret < 0)
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return ret;
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val &= info->modeset_mask;
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val >>= ffs(info->modeset_mask) - 1;
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return (val & BIT(0)) ? REGULATOR_MODE_STANDBY : REGULATOR_MODE_NORMAL;
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}
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static const struct regulator_ops mt6331_volt_range_ops = {
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.list_voltage = regulator_list_voltage_linear_range,
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.map_voltage = regulator_map_voltage_linear_range,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_time_sel = regulator_set_voltage_time_sel,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.get_status = mt6331_get_status,
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};
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static const struct regulator_ops mt6331_volt_table_no_ms_ops = {
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_iterate,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_time_sel = regulator_set_voltage_time_sel,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.get_status = mt6331_get_status,
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};
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static const struct regulator_ops mt6331_volt_table_no_qi_ops = {
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_iterate,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_time_sel = regulator_set_voltage_time_sel,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.set_mode = mt6331_ldo_set_mode,
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.get_mode = mt6331_ldo_get_mode,
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};
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static const struct regulator_ops mt6331_volt_table_ops = {
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_iterate,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_time_sel = regulator_set_voltage_time_sel,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.get_status = mt6331_get_status,
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.set_mode = mt6331_ldo_set_mode,
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.get_mode = mt6331_ldo_get_mode,
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};
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static const struct regulator_ops mt6331_volt_table_ao_ops = {
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_iterate,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_time_sel = regulator_set_voltage_time_sel,
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};
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static const struct regulator_ops mt6331_volt_fixed_no_ms_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.get_status = mt6331_get_status,
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};
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static const struct regulator_ops mt6331_volt_fixed_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.get_status = mt6331_get_status,
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.set_mode = mt6331_ldo_set_mode,
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.get_mode = mt6331_ldo_get_mode,
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};
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/* The array is indexed by id(MT6331_ID_XXX) */
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static struct mt6331_regulator_info mt6331_regulators[] = {
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MT6331_BUCK("buck-vdvfs11", VDVFS11, 700000, 1493750, 6250,
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buck_volt_range, MT6331_VDVFS11_CON9,
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MT6331_VDVFS11_CON11, GENMASK(6, 0),
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MT6331_VDVFS11_CON12, MT6331_VDVFS11_CON7),
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MT6331_BUCK("buck-vdvfs12", VDVFS12, 700000, 1493750, 6250,
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buck_volt_range, MT6331_VDVFS12_CON9,
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MT6331_VDVFS12_CON11, GENMASK(6, 0),
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MT6331_VDVFS12_CON12, MT6331_VDVFS12_CON7),
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MT6331_BUCK("buck-vdvfs13", VDVFS13, 700000, 1493750, 6250,
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buck_volt_range, MT6331_VDVFS13_CON9,
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MT6331_VDVFS13_CON11, GENMASK(6, 0),
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MT6331_VDVFS13_CON12, MT6331_VDVFS13_CON7),
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MT6331_BUCK("buck-vdvfs14", VDVFS14, 700000, 1493750, 6250,
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buck_volt_range, MT6331_VDVFS14_CON9,
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MT6331_VDVFS14_CON11, GENMASK(6, 0),
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MT6331_VDVFS14_CON12, MT6331_VDVFS14_CON7),
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MT6331_BUCK("buck-vcore2", VCORE2, 700000, 1493750, 6250,
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buck_volt_range, MT6331_VCORE2_CON9,
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MT6331_VCORE2_CON11, GENMASK(6, 0),
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MT6331_VCORE2_CON12, MT6331_VCORE2_CON7),
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MT6331_REG_FIXED("buck-vio18", VIO18, MT6331_VIO18_CON9, 0, 13, 1800000, 0, 0),
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MT6331_REG_FIXED("ldo-vrtc", VRTC, MT6331_DIGLDO_CON11, 8, 15, 2800000, 0, 0),
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MT6331_REG_FIXED("ldo-vtcxo1", VTCXO1, MT6331_ANALDO_CON1, 10, 15, 2800000,
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MT6331_ANALDO_CON1, GENMASK(1, 0)),
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MT6331_REG_FIXED("ldo-vtcxo2", VTCXO2, MT6331_ANALDO_CON2, 10, 15, 2800000,
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MT6331_ANALDO_CON2, GENMASK(1, 0)),
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MT6331_REG_FIXED("ldo-vsram", VSRAM_DVFS1, MT6331_SYSLDO_CON4, 10, 15, 1012500,
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MT6331_SYSLDO_CON4, GENMASK(1, 0)),
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MT6331_REG_FIXED("ldo-vio28", VIO28, MT6331_DIGLDO_CON1, 10, 15, 2800000,
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MT6331_DIGLDO_CON1, GENMASK(1, 0)),
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MT6331_LDO("ldo-avdd32aud", AVDD32_AUD, ldo_volt_table1, MT6331_ANALDO_CON3, 10,
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MT6331_ANALDO_CON10, GENMASK(6, 5), MT6331_ANALDO_CON3, GENMASK(1, 0)),
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MT6331_LDO("ldo-vauxa32", VAUXA32, ldo_volt_table1, MT6331_ANALDO_CON4, 10,
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MT6331_ANALDO_CON6, GENMASK(6, 5), MT6331_ANALDO_CON4, GENMASK(1, 0)),
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MT6331_LDO("ldo-vemc33", VEMC33, ldo_volt_table6, MT6331_DIGLDO_CON5, 10,
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MT6331_DIGLDO_CON17, BIT(6), MT6331_DIGLDO_CON5, GENMASK(1, 0)),
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MT6331_LDO("ldo-vibr", VIBR, ldo_volt_table3, MT6331_DIGLDO_CON12, 10,
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MT6331_DIGLDO_CON20, GENMASK(6, 4), MT6331_DIGLDO_CON12, GENMASK(1, 0)),
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MT6331_LDO("ldo-vmc", VMC, ldo_volt_table5, MT6331_DIGLDO_CON3, 10,
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MT6331_DIGLDO_CON15, GENMASK(5, 4), MT6331_DIGLDO_CON3, GENMASK(1, 0)),
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MT6331_LDO("ldo-vmch", VMCH, ldo_volt_table6, MT6331_DIGLDO_CON4, 10,
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MT6331_DIGLDO_CON16, BIT(6), MT6331_DIGLDO_CON4, GENMASK(1, 0)),
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MT6331_LDO("ldo-vmipi", VMIPI, ldo_volt_table3, MT6331_SYSLDO_CON5, 10,
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MT6331_SYSLDO_CON13, GENMASK(5, 3), MT6331_SYSLDO_CON5, GENMASK(1, 0)),
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MT6331_LDO("ldo-vsim1", VSIM1, ldo_volt_table4, MT6331_DIGLDO_CON8, 10,
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MT6331_DIGLDO_CON21, GENMASK(6, 4), MT6331_DIGLDO_CON8, GENMASK(1, 0)),
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MT6331_LDO("ldo-vsim2", VSIM2, ldo_volt_table4, MT6331_DIGLDO_CON9, 10,
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MT6331_DIGLDO_CON22, GENMASK(6, 4), MT6331_DIGLDO_CON9, GENMASK(1, 0)),
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MT6331_LDO("ldo-vusb10", VUSB10, ldo_volt_table9, MT6331_SYSLDO_CON2, 10,
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MT6331_SYSLDO_CON10, GENMASK(5, 3), MT6331_SYSLDO_CON2, GENMASK(1, 0)),
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MT6331_LDO("ldo-vcama", VCAMA, ldo_volt_table2, MT6331_ANALDO_CON5, 15,
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MT6331_ANALDO_CON9, GENMASK(5, 4), 0, 0),
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MT6331_LDO_S("ldo-vcamaf", VCAM_AF, ldo_volt_table3, MT6331_DIGLDO_CON2, 10,
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MT6331_DIGLDO_CON14, GENMASK(6, 4), MT6331_DIGLDO_CON2, GENMASK(1, 0),
|
|
MT6331_EN_STATUS1, BIT(0)),
|
|
MT6331_LDO_S("ldo-vcamd", VCAMD, ldo_volt_table8, MT6331_SYSLDO_CON1, 15,
|
|
MT6331_SYSLDO_CON9, GENMASK(6, 4), MT6331_SYSLDO_CON1, GENMASK(1, 0),
|
|
MT6331_EN_STATUS1, BIT(11)),
|
|
MT6331_LDO_S("ldo-vcamio", VCAM_IO, ldo_volt_table10, MT6331_SYSLDO_CON3, 10,
|
|
MT6331_SYSLDO_CON11, GENMASK(4, 3), MT6331_SYSLDO_CON3, GENMASK(1, 0),
|
|
MT6331_EN_STATUS1, BIT(13)),
|
|
MT6331_LDO_S("ldo-vgp1", VGP1, ldo_volt_table3, MT6331_DIGLDO_CON6, 10,
|
|
MT6331_DIGLDO_CON19, GENMASK(6, 4), MT6331_DIGLDO_CON6, GENMASK(1, 0),
|
|
MT6331_EN_STATUS1, BIT(4)),
|
|
MT6331_LDO_S("ldo-vgp2", VGP2, ldo_volt_table10, MT6331_SYSLDO_CON6, 10,
|
|
MT6331_SYSLDO_CON14, GENMASK(4, 3), MT6331_SYSLDO_CON6, GENMASK(1, 0),
|
|
MT6331_EN_STATUS1, BIT(15)),
|
|
MT6331_LDO_S("ldo-vgp3", VGP3, ldo_volt_table10, MT6331_SYSLDO_CON7, 10,
|
|
MT6331_SYSLDO_CON15, GENMASK(4, 3), MT6331_SYSLDO_CON7, GENMASK(1, 0),
|
|
MT6331_EN_STATUS2, BIT(0)),
|
|
MT6331_LDO_S("ldo-vgp4", VGP4, ldo_volt_table7, MT6331_DIGLDO_CON7, 10,
|
|
MT6331_DIGLDO_CON18, GENMASK(6, 4), MT6331_DIGLDO_CON7, GENMASK(1, 0),
|
|
MT6331_EN_STATUS1, BIT(5)),
|
|
MT6331_LDO_AO("ldo-vdig18", VDIG18, ldo_volt_table11,
|
|
MT6331_DIGLDO_CON28, GENMASK(14, 12)),
|
|
};
|
|
|
|
static int mt6331_set_buck_vosel_reg(struct platform_device *pdev)
|
|
{
|
|
struct mt6397_chip *mt6331 = dev_get_drvdata(pdev->dev.parent);
|
|
int i;
|
|
u32 regval;
|
|
|
|
for (i = 0; i < MT6331_ID_VREG_MAX; i++) {
|
|
if (mt6331_regulators[i].vselctrl_reg) {
|
|
if (regmap_read(mt6331->regmap,
|
|
mt6331_regulators[i].vselctrl_reg,
|
|
®val) < 0) {
|
|
dev_err(&pdev->dev,
|
|
"Failed to read buck ctrl\n");
|
|
return -EIO;
|
|
}
|
|
|
|
if (regval & mt6331_regulators[i].vselctrl_mask) {
|
|
mt6331_regulators[i].desc.vsel_reg =
|
|
mt6331_regulators[i].vselon_reg;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mt6331_regulator_probe(struct platform_device *pdev)
|
|
{
|
|
struct mt6397_chip *mt6331 = 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 (mt6331_set_buck_vosel_reg(pdev))
|
|
return -EIO;
|
|
|
|
/* Read PMIC chip revision to update constraints and voltage table */
|
|
if (regmap_read(mt6331->regmap, MT6331_HWCID, ®_value) < 0) {
|
|
dev_err(&pdev->dev, "Failed to read Chip ID\n");
|
|
return -EIO;
|
|
}
|
|
reg_value &= GENMASK(7, 0);
|
|
|
|
dev_info(&pdev->dev, "Chip ID = 0x%x\n", reg_value);
|
|
|
|
/*
|
|
* ChipID 0x10 is "MT6331 E1", has a different voltage table and
|
|
* it's currently not supported in this driver. Upon detection of
|
|
* this ID, refuse to register the regulators, as we will wrongly
|
|
* interpret the VSEL for this revision, potentially overvolting
|
|
* some device.
|
|
*/
|
|
if (reg_value == 0x10) {
|
|
dev_err(&pdev->dev, "Chip version not supported. Bailing out.\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
for (i = 0; i < MT6331_ID_VREG_MAX; i++) {
|
|
config.dev = &pdev->dev;
|
|
config.driver_data = &mt6331_regulators[i];
|
|
config.regmap = mt6331->regmap;
|
|
rdev = devm_regulator_register(&pdev->dev,
|
|
&mt6331_regulators[i].desc, &config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&pdev->dev, "failed to register %s\n",
|
|
mt6331_regulators[i].desc.name);
|
|
return PTR_ERR(rdev);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id mt6331_platform_ids[] = {
|
|
{"mt6331-regulator", 0},
|
|
{ /* sentinel */ },
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, mt6331_platform_ids);
|
|
|
|
static struct platform_driver mt6331_regulator_driver = {
|
|
.driver = {
|
|
.name = "mt6331-regulator",
|
|
},
|
|
.probe = mt6331_regulator_probe,
|
|
.id_table = mt6331_platform_ids,
|
|
};
|
|
|
|
module_platform_driver(mt6331_regulator_driver);
|
|
|
|
MODULE_AUTHOR("AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>");
|
|
MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6331 PMIC");
|
|
MODULE_LICENSE("GPL");
|