The MT6392 is a regulator found on boards based on the MediaTek MT8167, MT8516, and probably other SoCs. It is a so called PMIC and connectcts as a slave to a SoC using SPI, wrapped inside PWRAP.
Signed-off-by: Fabien Parent <fpar...@baylibre.com> --- drivers/regulator/Kconfig | 9 + drivers/regulator/Makefile | 1 + drivers/regulator/mt6392-regulator.c | 490 +++++++++++++++++++++ include/linux/regulator/mt6392-regulator.h | 40 ++ 4 files changed, 540 insertions(+) create mode 100644 drivers/regulator/mt6392-regulator.c create mode 100644 include/linux/regulator/mt6392-regulator.h diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index b7f249ee5e68..c0109005128c 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -624,6 +624,15 @@ config REGULATOR_MT6380 This driver supports the control of different power rails of device through regulator interface. +config REGULATOR_MT6392 + tristate "MediaTek MT6392 PMIC" + depends on MFD_MT6397 + help + Say y here to select this option to enable the power regulator of + MediaTek MT6392 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 diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index 1169f8a27d91..5b8da206412e 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -80,6 +80,7 @@ obj-$(CONFIG_REGULATOR_MCP16502) += mcp16502.o obj-$(CONFIG_REGULATOR_MT6311) += mt6311-regulator.o obj-$(CONFIG_REGULATOR_MT6323) += mt6323-regulator.o obj-$(CONFIG_REGULATOR_MT6380) += mt6380-regulator.o +obj-$(CONFIG_REGULATOR_MT6392) += mt6392-regulator.o obj-$(CONFIG_REGULATOR_MT6397) += mt6397-regulator.o obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o obj-$(CONFIG_REGULATOR_QCOM_RPMH) += qcom-rpmh-regulator.o diff --git a/drivers/regulator/mt6392-regulator.c b/drivers/regulator/mt6392-regulator.c new file mode 100644 index 000000000000..d3c0e94d4cd0 --- /dev/null +++ b/drivers/regulator/mt6392-regulator.c @@ -0,0 +1,490 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2019 MediaTek Inc. + * Author: Chen Zhong <chen.zh...@mediatek.com> + */ + +#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/mt6392/registers.h> +#include <linux/regulator/driver.h> +#include <linux/regulator/machine.h> +#include <linux/regulator/mt6392-regulator.h> +#include <linux/regulator/of_regulator.h> + +#define MT6392_BUCK_MODE_AUTO 0 +#define MT6392_BUCK_MODE_FORCE_PWM 1 +#define MT6392_LDO_MODE_NORMAL 0 +#define MT6392_LDO_MODE_LP 1 + +/* + * MT6392 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 mt6392_regulator_info { + struct regulator_desc desc; + u32 qi; + u32 vselon_reg; + u32 vselctrl_reg; + u32 vselctrl_mask; + u32 modeset_reg; + u32 modeset_mask; +}; + +#define MT6392_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \ + vosel, vosel_mask, voselon, vosel_ctrl, \ + _modeset_reg, _modeset_mask) \ +[MT6392_ID_##vreg] = { \ + .desc = { \ + .name = #vreg, \ + .of_match = of_match_ptr(match), \ + .ops = &mt6392_volt_range_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = MT6392_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 = _modeset_mask, \ +} + +#define MT6392_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel, \ + vosel_mask, _modeset_reg, _modeset_mask) \ +[MT6392_ID_##vreg] = { \ + .desc = { \ + .name = #vreg, \ + .of_match = of_match_ptr(match), \ + .ops = &mt6392_volt_table_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = MT6392_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 MT6392_REG_FIXED(match, vreg, enreg, enbit, volt, \ + _modeset_reg, _modeset_mask) \ +[MT6392_ID_##vreg] = { \ + .desc = { \ + .name = #vreg, \ + .of_match = of_match_ptr(match), \ + .ops = &mt6392_volt_fixed_ops, \ + .type = REGULATOR_VOLTAGE, \ + .id = MT6392_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 u32 ldo_volt_table1[] = { + 1800000, 1900000, 2000000, 2200000, +}; + +static const u32 ldo_volt_table2[] = { + 3300000, 3400000, 3500000, 3600000, +}; + +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[] = { + 1240000, 1390000, +}; + +static const u32 ldo_volt_table7[] = { + 1200000, 1300000, 1500000, 1800000, +}; + +static const u32 ldo_volt_table8[] = { + 1800000, 2000000, +}; + +static int mt6392_get_status(struct regulator_dev *rdev) +{ + int ret; + u32 regval; + struct mt6392_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 int mt6392_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) +{ + int ret, val = 0; + struct mt6392_regulator_info *info = rdev_get_drvdata(rdev); + u32 reg_value; + + 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_FAST: + val = MT6392_BUCK_MODE_FORCE_PWM; + break; + case REGULATOR_MODE_NORMAL: + val = MT6392_BUCK_MODE_AUTO; + break; + default: + return -EINVAL; + } + + val <<= ffs(info->modeset_mask) - 1; + + ret = regmap_update_bits(rdev->regmap, info->modeset_reg, + info->modeset_mask, val); + + if (regmap_read(rdev->regmap, info->modeset_reg, ®_value) < 0) { + dev_err(&rdev->dev, "Failed to read register value\n"); + return -EIO; + } + + return ret; +} + +static unsigned int mt6392_buck_get_mode(struct regulator_dev *rdev) +{ + unsigned int val; + unsigned int mode; + int ret; + struct mt6392_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_FAST; + else + mode = REGULATOR_MODE_NORMAL; + + return mode; +} + +static int mt6392_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode) +{ + int ret, val = 0; + struct mt6392_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 = MT6392_LDO_MODE_LP; + break; + case REGULATOR_MODE_NORMAL: + val = MT6392_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 mt6392_ldo_get_mode(struct regulator_dev *rdev) +{ + unsigned int val; + unsigned int mode; + int ret; + struct mt6392_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 const struct regulator_ops mt6392_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 = mt6392_get_status, + .set_mode = mt6392_buck_set_mode, + .get_mode = mt6392_buck_get_mode, +}; + +static const struct regulator_ops mt6392_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 = mt6392_get_status, + .set_mode = mt6392_ldo_set_mode, + .get_mode = mt6392_ldo_get_mode, +}; + +static const struct regulator_ops mt6392_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 = mt6392_get_status, + .set_mode = mt6392_ldo_set_mode, + .get_mode = mt6392_ldo_get_mode, +}; + +/* The array is indexed by id(MT6392_ID_XXX) */ +static struct mt6392_regulator_info mt6392_regulators[] = { + MT6392_BUCK("buck_vproc", VPROC, 700000, 1493750, 6250, + buck_volt_range1, MT6392_VPROC_CON7, MT6392_VPROC_CON9, 0x7f, + MT6392_VPROC_CON10, MT6392_VPROC_CON5, MT6392_VPROC_CON2, + 0x100), + MT6392_BUCK("buck_vsys", VSYS, 1400000, 2987500, 12500, + buck_volt_range2, MT6392_VSYS_CON7, MT6392_VSYS_CON9, 0x7f, + MT6392_VSYS_CON10, MT6392_VSYS_CON5, MT6392_VSYS_CON2, 0x100), + MT6392_BUCK("buck_vcore", VCORE, 700000, 1493750, 6250, + buck_volt_range1, MT6392_VCORE_CON7, MT6392_VCORE_CON9, 0x7f, + MT6392_VCORE_CON10, MT6392_VCORE_CON5, MT6392_VCORE_CON2, + 0x100), + MT6392_REG_FIXED("ldo_vxo22", VXO22, MT6392_ANALDO_CON1, 10, 2200000, + MT6392_ANALDO_CON1, 0x2), + MT6392_LDO("ldo_vaud22", VAUD22, ldo_volt_table1, + MT6392_ANALDO_CON2, 14, MT6392_ANALDO_CON8, 0x60, + MT6392_ANALDO_CON2, 0x2), + MT6392_REG_FIXED("ldo_vcama", VCAMA, MT6392_ANALDO_CON4, 15, 2800000, + -1, 0), + MT6392_REG_FIXED("ldo_vaud28", VAUD28, MT6392_ANALDO_CON23, 14, 2800000, + MT6392_ANALDO_CON23, 0x2), + MT6392_REG_FIXED("ldo_vadc18", VADC18, MT6392_ANALDO_CON25, 14, 1800000, + MT6392_ANALDO_CON25, 0x2), + MT6392_LDO("ldo_vcn35", VCN35, ldo_volt_table2, + MT6392_ANALDO_CON21, 12, MT6392_ANALDO_CON16, 0xC, + MT6392_ANALDO_CON21, 0x2), + MT6392_REG_FIXED("ldo_vio28", VIO28, MT6392_DIGLDO_CON0, 14, 2800000, + MT6392_DIGLDO_CON0, 0x2), + MT6392_REG_FIXED("ldo_vusb", VUSB, MT6392_DIGLDO_CON2, 14, 3300000, + MT6392_DIGLDO_CON2, 0x2), + MT6392_LDO("ldo_vmc", VMC, ldo_volt_table3, + MT6392_DIGLDO_CON3, 12, MT6392_DIGLDO_CON24, 0x10, + MT6392_DIGLDO_CON3, 0x2), + MT6392_LDO("ldo_vmch", VMCH, ldo_volt_table4, + MT6392_DIGLDO_CON5, 14, MT6392_DIGLDO_CON26, 0x80, + MT6392_DIGLDO_CON5, 0x2), + MT6392_LDO("ldo_vemc3v3", VEMC3V3, ldo_volt_table4, + MT6392_DIGLDO_CON6, 14, MT6392_DIGLDO_CON27, 0x80, + MT6392_DIGLDO_CON6, 0x2), + MT6392_LDO("ldo_vgp1", VGP1, ldo_volt_table5, + MT6392_DIGLDO_CON7, 15, MT6392_DIGLDO_CON28, 0xE0, + MT6392_DIGLDO_CON7, 0x2), + MT6392_LDO("ldo_vgp2", VGP2, ldo_volt_table5, + MT6392_DIGLDO_CON8, 15, MT6392_DIGLDO_CON29, 0xE0, + MT6392_DIGLDO_CON8, 0x2), + MT6392_REG_FIXED("ldo_vcn18", VCN18, MT6392_DIGLDO_CON11, 14, 1800000, + MT6392_DIGLDO_CON11, 0x2), + MT6392_LDO("ldo_vcamaf", VCAMAF, ldo_volt_table5, + MT6392_DIGLDO_CON31, 15, MT6392_DIGLDO_CON32, 0xE0, + MT6392_DIGLDO_CON31, 0x2), + MT6392_LDO("ldo_vm", VM, ldo_volt_table6, + MT6392_DIGLDO_CON47, 14, MT6392_DIGLDO_CON48, 0x30, + MT6392_DIGLDO_CON47, 0x2), + MT6392_REG_FIXED("ldo_vio18", VIO18, MT6392_DIGLDO_CON49, 14, 1800000, + MT6392_DIGLDO_CON49, 0x2), + MT6392_LDO("ldo_vcamd", VCAMD, ldo_volt_table7, + MT6392_DIGLDO_CON51, 14, MT6392_DIGLDO_CON52, 0x60, + MT6392_DIGLDO_CON51, 0x2), + MT6392_REG_FIXED("ldo_vcamio", VCAMIO, MT6392_DIGLDO_CON53, 14, 1800000, + MT6392_DIGLDO_CON53, 0x2), + MT6392_REG_FIXED("ldo_vm25", VM25, MT6392_DIGLDO_CON55, 14, 2500000, + MT6392_DIGLDO_CON55, 0x2), + MT6392_LDO("ldo_vefuse", VEFUSE, ldo_volt_table8, + MT6392_DIGLDO_CON57, 14, MT6392_DIGLDO_CON58, 0x10, + MT6392_DIGLDO_CON57, 0x2), +}; + +static int mt6392_set_buck_vosel_reg(struct platform_device *pdev) +{ + struct mt6397_chip *mt6392 = dev_get_drvdata(pdev->dev.parent); + int i; + u32 regval; + + for (i = 0; i < MT6392_MAX_REGULATOR; i++) { + if (mt6392_regulators[i].vselctrl_reg) { + if (regmap_read(mt6392->regmap, + mt6392_regulators[i].vselctrl_reg, + ®val) < 0) { + dev_err(&pdev->dev, + "Failed to read buck ctrl\n"); + return -EIO; + } + + if (regval & mt6392_regulators[i].vselctrl_mask) { + mt6392_regulators[i].desc.vsel_reg = + mt6392_regulators[i].vselon_reg; + } + } + } + + return 0; +} + +static int mt6392_regulator_probe(struct platform_device *pdev) +{ + struct mt6397_chip *mt6392 = dev_get_drvdata(pdev->dev.parent); + struct regulator_config config = {}; + struct regulator_dev *rdev; + struct regulation_constraints *c; + int i; + u32 reg_value; + + /* Query buck controller to select activated voltage register part */ + if (mt6392_set_buck_vosel_reg(pdev)) + return -EIO; + + /* Read PMIC chip revision to update constraints and voltage table */ + if (regmap_read(mt6392->regmap, MT6392_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); + + for (i = 0; i < MT6392_MAX_REGULATOR; i++) { + config.dev = &pdev->dev; + config.driver_data = &mt6392_regulators[i]; + config.regmap = mt6392->regmap; + rdev = devm_regulator_register(&pdev->dev, + &mt6392_regulators[i].desc, &config); + if (IS_ERR(rdev)) { + dev_err(&pdev->dev, "failed to register %s\n", + mt6392_regulators[i].desc.name); + return PTR_ERR(rdev); + } + + /* Constrain board-specific capabilities according to what + * this driver and the chip itself can actually do. + */ + c = rdev->constraints; + c->valid_modes_mask |= REGULATOR_MODE_NORMAL| + REGULATOR_MODE_STANDBY | REGULATOR_MODE_FAST; + c->valid_ops_mask |= REGULATOR_CHANGE_MODE; + + } + return 0; +} + +static const struct platform_device_id mt6392_platform_ids[] = { + {"mt6392-regulator", 0}, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(platform, mt6392_platform_ids); + +static const struct of_device_id mt6392_of_match[] = { + { .compatible = "mediatek,mt6392-regulator", }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(of, mt6392_of_match); + +static struct platform_driver mt6392_regulator_driver = { + .driver = { + .name = "mt6392-regulator", + .of_match_table = of_match_ptr(mt6392_of_match), + }, + .probe = mt6392_regulator_probe, + .id_table = mt6392_platform_ids, +}; + +module_platform_driver(mt6392_regulator_driver); + +MODULE_AUTHOR("Chen Zhong <chen.zh...@mediatek.com>"); +MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6392 PMIC"); +MODULE_LICENSE("GPL v2"); diff --git a/include/linux/regulator/mt6392-regulator.h b/include/linux/regulator/mt6392-regulator.h new file mode 100644 index 000000000000..dfcbcacb5ad4 --- /dev/null +++ b/include/linux/regulator/mt6392-regulator.h @@ -0,0 +1,40 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2019 MediaTek Inc. + * Author: Chen Zhong <chen.zh...@mediatek.com> + */ + +#ifndef __LINUX_REGULATOR_MT6392_H +#define __LINUX_REGULATOR_MT6392_H + +enum { + MT6392_ID_VPROC = 0, + MT6392_ID_VSYS, + MT6392_ID_VCORE, + MT6392_ID_VXO22, + MT6392_ID_VAUD22, + MT6392_ID_VCAMA, + MT6392_ID_VAUD28, + MT6392_ID_VADC18, + MT6392_ID_VCN35, + MT6392_ID_VIO28, + MT6392_ID_VUSB = 10, + MT6392_ID_VMC, + MT6392_ID_VMCH, + MT6392_ID_VEMC3V3, + MT6392_ID_VGP1, + MT6392_ID_VGP2, + MT6392_ID_VCN18, + MT6392_ID_VCAMAF, + MT6392_ID_VM, + MT6392_ID_VIO18, + MT6392_ID_VCAMD, + MT6392_ID_VCAMIO, + MT6392_ID_VM25, + MT6392_ID_VEFUSE, + MT6392_ID_RG_MAX, +}; + +#define MT6392_MAX_REGULATOR MT6392_ID_RG_MAX + +#endif /* __LINUX_REGULATOR_MT6392_H */ -- 2.20.1