[v3,07/10] regulator: mt6358: Add support for MT6358 regulator

The MT6358 is a regulator found on boards based on MediaTek MT8183 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: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
---
 drivers/regulator/Kconfig                  |   9 +
 drivers/regulator/Makefile                 |   1 +
 drivers/regulator/mt6358-regulator.c       | 586 +++++++++++++++++++++
 include/linux/regulator/mt6358-regulator.h |  56 ++
 4 files changed, 652 insertions(+)
 create mode 100644 drivers/regulator/mt6358-regulator.c
 create mode 100644 include/linux/regulator/mt6358-regulator.h

On Fri, May 03, 2019 at 05:31:14PM +0800, Hsin-Hsiung Wang wrote:

A few fairly minor things but mostly this looks good.

> +static const u32 vcama1_voltages[] = {
> +	1800000, 2500000, 2700000,
> +	2800000, 2900000, 3000000,
> +};

> +static const u32 vcama2_voltages[] = {
> +	1800000, 2500000, 2700000,
> +	2800000, 2900000, 3000000,
> +};
> +

These two tables look the same?

> +static int mt6358_get_voltage_sel(struct regulator_dev *rdev)
> +{
> +	int idx, ret;
> +	u32 selector;
> +	struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
> +	const u32 *pvol;
> +
> +	ret = regmap_read(rdev->regmap, info->desc.vsel_reg, &selector);
> +	if (ret != 0) {
> +		dev_info(&rdev->dev,
> +			 "Failed to get mt6358 %s vsel reg: %d\n",
> +			 info->desc.name, ret);
> +		return ret;
> +	}
> +
> +	selector = (selector & info->desc.vsel_mask) >> info->vsel_shift;
> +	pvol = (const u32 *)info->index_table;
> +	ret = -1;
> +	for (idx = 0; idx < info->desc.n_voltages; idx++) {
> +		if (pvol[idx] == selector) {
> +			ret = idx;
> +			break;
> +		}
> +	}
> +
> +	return ret;
> +}

I don't entirely understand what this is intended to do which suggests
it could use some comments.  As far as I can tell it's looking up the
hardware selector in a table and then using the index of the entry in
that table as the selector in order to deal with a sparse set of
selectors, is that right?  You should be able to handle this by having
_list_voltage() return an error code for the invalid selectors though we
don't have helpers for that yet as it's an unusual design.

Also -1 is not a good return value in the case where you fail to do a
mapping, use -EINVAL.

> +	ret = regmap_read(rdev->regmap, info->da_vsel_reg, &regval);
> +	if (ret != 0) {
> +		dev_info(&rdev->dev,
> +			 "Failed to get mt6358 Buck %s vsel reg: %d\n",
> +			 info->desc.name, ret);
> +		return ret;
> +	}

These error messages should be dev_err().

On Fri, May 3, 2019 at 6:34 PM Hsin-Hsiung Wang
<hsin-hsiung.wang@mediatek.com> wrote:
>
> The MT6358 is a regulator found on boards based on MediaTek MT8183 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: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
> ---
>  drivers/regulator/Kconfig                  |   9 +
>  drivers/regulator/Makefile                 |   1 +
>  drivers/regulator/mt6358-regulator.c       | 586 +++++++++++++++++++++
>  include/linux/regulator/mt6358-regulator.h |  56 ++
>  4 files changed, 652 insertions(+)
>  create mode 100644 drivers/regulator/mt6358-regulator.c
>  create mode 100644 include/linux/regulator/mt6358-regulator.h
>
> diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
> index b7f249ee5e68..668e9716558c 100644
> --- a/drivers/regulator/Kconfig
> +++ b/drivers/regulator/Kconfig
> @@ -615,6 +615,15 @@ config REGULATOR_MT6323
>           This driver supports the control of different power rails of device
>           through regulator interface.
>
> +config REGULATOR_MT6358
> +       tristate "MediaTek MT6358 PMIC"
> +       depends on MFD_MT6397
> +       help
> +         Say y here to select this option to enable the power regulator of
> +         MediaTek MT6358 PMIC.
> +         This driver supports the control of different power rails of device
> +         through regulator interface.
> +
>  config REGULATOR_MT6380
>         tristate "MediaTek MT6380 PMIC"
>         depends on MTK_PMIC_WRAP
> diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
> index 1169f8a27d91..eeb60395c692 100644
> --- a/drivers/regulator/Makefile
> +++ b/drivers/regulator/Makefile
> @@ -79,6 +79,7 @@ obj-$(CONFIG_REGULATOR_MC13XXX_CORE) +=  mc13xxx-regulator-core.o
>  obj-$(CONFIG_REGULATOR_MCP16502) += mcp16502.o
>  obj-$(CONFIG_REGULATOR_MT6311) += mt6311-regulator.o
>  obj-$(CONFIG_REGULATOR_MT6323) += mt6323-regulator.o
> +obj-$(CONFIG_REGULATOR_MT6358) += mt6358-regulator.o
>  obj-$(CONFIG_REGULATOR_MT6380) += mt6380-regulator.o
>  obj-$(CONFIG_REGULATOR_MT6397) += mt6397-regulator.o
>  obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o
> diff --git a/drivers/regulator/mt6358-regulator.c b/drivers/regulator/mt6358-regulator.c
> new file mode 100644
> index 000000000000..fd528a3e55fd
> --- /dev/null
> +++ b/drivers/regulator/mt6358-regulator.c
> @@ -0,0 +1,586 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Copyright (c) 2019 MediaTek Inc.
> +
> +#include <linux/mfd/mt6358/registers.h>
> +#include <linux/mfd/mt6397/core.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +#include <linux/regulator/driver.h>
> +#include <linux/regulator/machine.h>
> +#include <linux/regulator/mt6358-regulator.h>
> +#include <linux/regulator/of_regulator.h>
> +
> +#define MT6358_BUCK_MODE_AUTO  0
> +#define MT6358_BUCK_MODE_FORCE_PWM     1
> +
> +/*
> + * MT6358 regulators' information
> + *
> + * @desc: standard fields of regulator description.
> + * @qi: Mask for query enable signal status of regulators
> + */
> +struct mt6358_regulator_info {
> +       struct regulator_desc desc;
> +       u32 status_reg;
> +       u32 qi;
> +       const u32 *index_table;
> +       unsigned int n_table;
> +       u32 vsel_shift;
> +       u32 da_vsel_reg;
> +       u32 da_vsel_mask;
> +       u32 da_vsel_shift;
> +       u32 modeset_reg;
> +       u32 modeset_mask;
> +       u32 modeset_shift;
> +};
> +
> +#define MT6358_BUCK(match, vreg, min, max, step,               \
> +       volt_ranges, vosel_mask, _da_vsel_reg, _da_vsel_mask,   \
> +       _da_vsel_shift, _modeset_reg, _modeset_shift)           \
> +[MT6358_ID_##vreg] = { \
> +       .desc = {       \
> +               .name = #vreg,  \
> +               .of_match = of_match_ptr(match),        \
> +               .ops = &mt6358_volt_range_ops,  \
> +               .type = REGULATOR_VOLTAGE,      \
> +               .id = MT6358_ID_##vreg,         \
> +               .owner = THIS_MODULE,           \
> +               .n_voltages = ((max) - (min)) / (step) + 1,     \
> +               .linear_ranges = volt_ranges,           \
> +               .n_linear_ranges = ARRAY_SIZE(volt_ranges),     \
> +               .vsel_reg = MT6358_BUCK_##vreg##_ELR0,  \
> +               .vsel_mask = vosel_mask,        \
> +               .enable_reg = MT6358_BUCK_##vreg##_CON0,        \
> +               .enable_mask = BIT(0),  \
> +               .of_map_mode = mt6358_map_mode, \
> +       },      \
> +       .status_reg = MT6358_BUCK_##vreg##_DBG1,        \
> +       .qi = BIT(0),   \
> +       .da_vsel_reg = _da_vsel_reg,    \
> +       .da_vsel_mask = _da_vsel_mask,  \
> +       .da_vsel_shift = _da_vsel_shift,        \
> +       .modeset_reg = _modeset_reg,    \
> +       .modeset_mask = BIT(_modeset_shift),    \
> +       .modeset_shift = _modeset_shift \
> +}
> +
> +#define MT6358_LDO(match, vreg, ldo_volt_table,        \
> +       ldo_index_table, enreg, enbit, vosel,   \
> +       vosel_mask, vosel_shift)        \
> +[MT6358_ID_##vreg] = { \
> +       .desc = {       \
> +               .name = #vreg,  \
> +               .of_match = of_match_ptr(match),        \
> +               .ops = &mt6358_volt_table_ops,  \
> +               .type = REGULATOR_VOLTAGE,      \
> +               .id = MT6358_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),      \
> +       },      \
> +       .status_reg = MT6358_LDO_##vreg##_CON1, \
> +       .qi = BIT(15),  \
> +       .index_table = ldo_index_table, \
> +       .n_table = ARRAY_SIZE(ldo_index_table), \
> +       .vsel_shift = vosel_shift,      \
> +}
> +
> +#define MT6358_LDO1(match, vreg, min, max, step,       \
> +       volt_ranges, _da_vsel_reg, _da_vsel_mask,       \
> +       _da_vsel_shift, vosel, vosel_mask)      \
> +[MT6358_ID_##vreg] = { \
> +       .desc = {       \
> +               .name = #vreg,  \
> +               .of_match = of_match_ptr(match),        \
> +               .ops = &mt6358_volt_range_ops,  \
> +               .type = REGULATOR_VOLTAGE,      \
> +               .id = MT6358_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 = MT6358_LDO_##vreg##_CON0, \
> +               .enable_mask = BIT(0),  \
> +       },      \
> +       .da_vsel_reg = _da_vsel_reg,    \
> +       .da_vsel_mask = _da_vsel_mask,  \
> +       .da_vsel_shift = _da_vsel_shift,        \
> +       .status_reg = MT6358_LDO_##vreg##_DBG1, \
> +       .qi = BIT(0),   \
> +}
> +
> +#define MT6358_REG_FIXED(match, vreg,  \
> +       enreg, enbit, volt)     \
> +[MT6358_ID_##vreg] = { \
> +       .desc = {       \
> +               .name = #vreg,  \
> +               .of_match = of_match_ptr(match),        \
> +               .ops = &mt6358_volt_fixed_ops,  \
> +               .type = REGULATOR_VOLTAGE,      \
> +               .id = MT6358_ID_##vreg, \
> +               .owner = THIS_MODULE,   \
> +               .n_voltages = 1,        \
> +               .enable_reg = enreg,    \
> +               .enable_mask = BIT(enbit),      \
> +               .min_uV = volt, \
> +       },      \
> +       .status_reg = MT6358_LDO_##vreg##_CON1, \
> +       .qi = BIT(15),                                                  \
> +}
> +
> +static const struct regulator_linear_range buck_volt_range1[] = {
> +       REGULATOR_LINEAR_RANGE(500000, 0, 0x7f, 6250),
> +};
> +
> +static const struct regulator_linear_range buck_volt_range2[] = {
> +       REGULATOR_LINEAR_RANGE(500000, 0, 0x7f, 12500),
> +};
> +
> +static const struct regulator_linear_range buck_volt_range3[] = {
> +       REGULATOR_LINEAR_RANGE(500000, 0, 0x3f, 50000),
> +};
> +
> +static const struct regulator_linear_range buck_volt_range4[] = {
> +       REGULATOR_LINEAR_RANGE(1000000, 0, 0x7f, 12500),
> +};
> +
> +static const u32 vdram2_voltages[] = {
> +       600000, 1800000,
> +};
> +
> +static const u32 vsim1_voltages[] = {
> +       1700000, 1800000, 2700000, 3000000, 3100000,
> +};
> +
> +static const u32 vibr_voltages[] = {
> +       1200000, 1300000, 1500000, 1800000,
> +       2000000, 2800000, 3000000, 3300000,
> +};
> +
> +static const u32 vusb_voltages[] = {
> +       3000000, 3100000,
> +};
> +
> +static const u32 vcamd_voltages[] = {
> +       900000, 1000000, 1100000, 1200000,
> +       1300000, 1500000, 1800000,
> +};
> +
> +static const u32 vefuse_voltages[] = {
> +       1700000, 1800000, 1900000,
> +};
> +
> +static const u32 vmch_voltages[] = {
> +       2900000, 3000000, 3300000,
> +};
> +
> +static const u32 vcama1_voltages[] = {
> +       1800000, 2500000, 2700000,
> +       2800000, 2900000, 3000000,
> +};
> +
> +static const u32 vemc_voltages[] = {
> +       2900000, 3000000, 3300000,
> +};
> +
> +static const u32 vcn33_bt_wifi_voltages[] = {
> +       3300000, 3400000, 3500000,
> +};
> +
> +static const u32 vcama2_voltages[] = {
> +       1800000, 2500000, 2700000,
> +       2800000, 2900000, 3000000,
> +};
> +
> +static const u32 vmc_voltages[] = {
> +       1800000, 2900000, 3000000, 3300000,
> +};
> +
> +static const u32 vldo28_voltages[] = {
> +       2800000, 3000000,
> +};
> +
> +static const u32 vsim2_voltages[] = {
> +       1700000, 1800000, 2700000,
> +       3000000, 3100000,
> +};
> +
> +static const u32 vdram2_idx[] = {
> +       0, 12,
> +};
> +
> +static const u32 vsim1_idx[] = {
> +       3, 4, 8, 11, 12,
> +};
> +
> +static const u32 vibr_idx[] = {
> +       0, 1, 2, 4, 5, 9, 11, 13,
> +};
> +
> +static const u32 vusb_idx[] = {
> +       3, 4,
> +};
> +
> +static const u32 vcamd_idx[] = {
> +       3, 4, 5, 6, 7, 9, 12,
> +};
> +
> +static const u32 vefuse_idx[] = {
> +       11, 12, 13,
> +};
> +
> +static const u32 vmch_idx[] = {
> +       2, 3, 5,
> +};
> +
> +static const u32 vcama1_idx[] = {
> +       0, 7, 9, 10, 11, 12,
> +};
> +
> +static const u32 vemc_idx[] = {
> +       2, 3, 5,
> +};
> +
> +static const u32 vcn33_bt_wifi_idx[] = {
> +       1, 2, 3,
> +};
> +
> +static const u32 vcama2_idx[] = {
> +       0, 7, 9, 10, 11, 12,
> +};
> +
> +static const u32 vmc_idx[] = {
> +       4, 10, 11, 13,
> +};
> +
> +static const u32 vldo28_idx[] = {
> +       1, 3,
> +};
> +
> +static const u32 vsim2_idx[] = {
> +       3, 4, 8, 11, 12,
> +};
> +
> +static inline unsigned int mt6358_map_mode(unsigned int mode)
> +{
> +       return mode == MT6358_BUCK_MODE_AUTO ?
> +               REGULATOR_MODE_NORMAL : REGULATOR_MODE_FAST;
> +}
> +
> +static int mt6358_set_voltage_sel(struct regulator_dev *rdev,
> +                                 unsigned int selector)
> +{
> +       int idx, ret;
> +       const u32 *pvol;
> +       struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
> +
> +       pvol = (const u32 *)info->index_table;

Why do you need that cast? I think info->index_table is already the right type.


> +
> +       idx = pvol[selector];
> +       ret = regmap_update_bits(rdev->regmap, info->desc.vsel_reg,
> +                                info->desc.vsel_mask,
> +                                idx << info->vsel_shift);
> +
> +       return ret;
> +}
> +
> +static int mt6358_get_voltage_sel(struct regulator_dev *rdev)
> +{
> +       int idx, ret;
> +       u32 selector;
> +       struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
> +       const u32 *pvol;
> +
> +       ret = regmap_read(rdev->regmap, info->desc.vsel_reg, &selector);
> +       if (ret != 0) {
> +               dev_info(&rdev->dev,
> +                        "Failed to get mt6358 %s vsel reg: %d\n",
> +                        info->desc.name, ret);
> +               return ret;
> +       }
> +
> +       selector = (selector & info->desc.vsel_mask) >> info->vsel_shift;
> +       pvol = (const u32 *)info->index_table;
> +       ret = -1;
> +       for (idx = 0; idx < info->desc.n_voltages; idx++) {
> +               if (pvol[idx] == selector) {
> +                       ret = idx;
> +                       break;

On top of Mark's comment, I'd just return idx; here.

> +               }
> +       }
> +
> +       return ret;

And return -1 here (or whatever better error code we should return).

> +}
> +
> +static int mt6358_get_buck_voltage_sel(struct regulator_dev *rdev)
> +{
> +       int ret, regval;
> +       struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
> +
> +       ret = regmap_read(rdev->regmap, info->da_vsel_reg, &regval);
> +       if (ret != 0) {
> +               dev_info(&rdev->dev,
> +                        "Failed to get mt6358 Buck %s vsel reg: %d\n",
> +                        info->desc.name, ret);
> +               return ret;
> +       }
> +
> +       ret = (regval >> info->da_vsel_shift) & info->da_vsel_mask;
> +
> +       return ret;
> +}
> +
> +static int mt6358_get_status(struct regulator_dev *rdev)
> +{
> +       int ret;
> +       u32 regval;
> +       struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
> +
> +       ret = regmap_read(rdev->regmap, info->status_reg, &regval);
> +       if (ret != 0) {
> +               dev_info(&rdev->dev, "Failed to get enable reg: %d\n", ret);
> +               return ret;
> +       }
> +
> +       return (regval & info->qi) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF;
> +}
> +
> +static int mt6358_regulator_set_mode(struct regulator_dev *rdev,
> +                                    unsigned int mode)
> +{
> +       struct mt6358_regulator_info *info = rdev_get_drvdata(rdev);
> +       int ret, val;
> +
> +       switch (mode) {
> +       case REGULATOR_MODE_FAST:
> +               val = MT6358_BUCK_MODE_FORCE_PWM;
> +               break;
> +       case REGULATOR_MODE_NORMAL:
> +               val = MT6358_BUCK_MODE_AUTO;
> +               break;
> +       default:
> +               ret = -EINVAL;
> +               goto err_mode;
> +       }
> +
> +       dev_dbg(&rdev->dev, "mt6358 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 mt6358 buck mode: %d\n", ret);
> +               return ret;

Drop this line, and just do return ret below.

> +       }
> +
> +       return 0;
> +}
> +
> +static unsigned int mt6358_regulator_get_mode(struct regulator_dev *rdev)
> +{
> +       struct mt6358_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 mt6358 buck mode: %d\n", ret);
> +               return ret;
> +       }
> +
> +       switch ((regval & info->modeset_mask) >> info->modeset_shift) {
> +       case MT6358_BUCK_MODE_AUTO:
> +               return REGULATOR_MODE_NORMAL;
> +       case MT6358_BUCK_MODE_FORCE_PWM:
> +               return REGULATOR_MODE_FAST;
> +       default:
> +               return -EINVAL;
> +       }
> +}
> +
> +static const struct regulator_ops mt6358_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 = mt6358_get_buck_voltage_sel,
> +       .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 = mt6358_get_status,
> +       .set_mode = mt6358_regulator_set_mode,
> +       .get_mode = mt6358_regulator_get_mode,
> +};
> +
> +static const struct regulator_ops mt6358_volt_table_ops = {
> +       .list_voltage = regulator_list_voltage_table,
> +       .map_voltage = regulator_map_voltage_iterate,
> +       .set_voltage_sel = mt6358_set_voltage_sel,
> +       .get_voltage_sel = mt6358_get_voltage_sel,
> +       .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 = mt6358_get_status,
> +};
> +
> +static const struct regulator_ops mt6358_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 = mt6358_get_status,
> +};
> +
> +/* The array is indexed by id(MT6358_ID_XXX) */
> +static struct mt6358_regulator_info mt6358_regulators[] = {
> +       MT6358_BUCK("buck_vdram1", VDRAM1, 500000, 2087500, 12500,
> +                   buck_volt_range2, 0x7f, MT6358_BUCK_VDRAM1_DBG0, 0x7f,
> +                   0, MT6358_VDRAM1_ANA_CON0, 8),
> +       MT6358_BUCK("buck_vcore", VCORE, 500000, 1293750, 6250,
> +                   buck_volt_range1, 0x7f, MT6358_BUCK_VCORE_DBG0, 0x7f,
> +                   0, MT6358_VCORE_VGPU_ANA_CON0, 1),
> +       MT6358_BUCK("buck_vpa", VPA, 500000, 3650000, 50000,
> +                   buck_volt_range3, 0x3f, MT6358_BUCK_VPA_DBG0, 0x3f, 0,
> +                   MT6358_VPA_ANA_CON0, 3),
> +       MT6358_BUCK("buck_vproc11", VPROC11, 500000, 1293750, 6250,
> +                   buck_volt_range1, 0x7f, MT6358_BUCK_VPROC11_DBG0, 0x7f,
> +                   0, MT6358_VPROC_ANA_CON0, 1),
> +       MT6358_BUCK("buck_vproc12", VPROC12, 500000, 1293750, 6250,
> +                   buck_volt_range1, 0x7f, MT6358_BUCK_VPROC12_DBG0, 0x7f,
> +                   0, MT6358_VPROC_ANA_CON0, 2),
> +       MT6358_BUCK("buck_vgpu", VGPU, 500000, 1293750, 6250,
> +                   buck_volt_range1, 0x7f, MT6358_BUCK_VGPU_DBG0, 0x7f, 0,
> +                   MT6358_VCORE_VGPU_ANA_CON0, 2),
> +       MT6358_BUCK("buck_vs2", VS2, 500000, 2087500, 12500,
> +                   buck_volt_range2, 0x7f, MT6358_BUCK_VS2_DBG0, 0x7f, 0,
> +                   MT6358_VS2_ANA_CON0, 8),
> +       MT6358_BUCK("buck_vmodem", VMODEM, 500000, 1293750, 6250,
> +                   buck_volt_range1, 0x7f, MT6358_BUCK_VMODEM_DBG0, 0x7f,
> +                   0, MT6358_VMODEM_ANA_CON0, 8),
> +       MT6358_BUCK("buck_vs1", VS1, 1000000, 2587500, 12500,
> +                   buck_volt_range4, 0x7f, MT6358_BUCK_VS1_DBG0, 0x7f, 0,
> +                   MT6358_VS1_ANA_CON0, 8),
> +       MT6358_REG_FIXED("ldo_vrf12", VRF12,
> +                        MT6358_LDO_VRF12_CON0, 0, 1200000),
> +       MT6358_REG_FIXED("ldo_vio18", VIO18,
> +                        MT6358_LDO_VIO18_CON0, 0, 1800000),
> +       MT6358_REG_FIXED("ldo_vcamio", VCAMIO,
> +                        MT6358_LDO_VCAMIO_CON0, 0, 1800000),
> +       MT6358_REG_FIXED("ldo_vcn18", VCN18, MT6358_LDO_VCN18_CON0, 0, 1800000),
> +       MT6358_REG_FIXED("ldo_vfe28", VFE28, MT6358_LDO_VFE28_CON0, 0, 2800000),
> +       MT6358_REG_FIXED("ldo_vcn28", VCN28, MT6358_LDO_VCN28_CON0, 0, 2800000),
> +       MT6358_REG_FIXED("ldo_vxo22", VXO22, MT6358_LDO_VXO22_CON0, 0, 2200000),
> +       MT6358_REG_FIXED("ldo_vaux18", VAUX18,
> +                        MT6358_LDO_VAUX18_CON0, 0, 1800000),
> +       MT6358_REG_FIXED("ldo_vbif28", VBIF28,
> +                        MT6358_LDO_VBIF28_CON0, 0, 2800000),
> +       MT6358_REG_FIXED("ldo_vio28", VIO28, MT6358_LDO_VIO28_CON0, 0, 2800000),
> +       MT6358_REG_FIXED("ldo_va12", VA12, MT6358_LDO_VA12_CON0, 0, 1200000),
> +       MT6358_REG_FIXED("ldo_vrf18", VRF18, MT6358_LDO_VRF18_CON0, 0, 1800000),
> +       MT6358_REG_FIXED("ldo_vaud28", VAUD28,
> +                        MT6358_LDO_VAUD28_CON0, 0, 2800000),
> +       MT6358_LDO("ldo_vdram2", VDRAM2, vdram2_voltages, vdram2_idx,
> +                  MT6358_LDO_VDRAM2_CON0, 0, MT6358_LDO_VDRAM2_ELR0, 0x10, 0),
> +       MT6358_LDO("ldo_vsim1", VSIM1, vsim1_voltages, vsim1_idx,
> +                  MT6358_LDO_VSIM1_CON0, 0, MT6358_VSIM1_ANA_CON0, 0xf00, 8),
> +       MT6358_LDO("ldo_vibr", VIBR, vibr_voltages, vibr_idx,
> +                  MT6358_LDO_VIBR_CON0, 0, MT6358_VIBR_ANA_CON0, 0xf00, 8),
> +       MT6358_LDO("ldo_vusb", VUSB, vusb_voltages, vusb_idx,
> +                  MT6358_LDO_VUSB_CON0_0, 0, MT6358_VUSB_ANA_CON0, 0x700, 8),
> +       MT6358_LDO("ldo_vcamd", VCAMD, vcamd_voltages, vcamd_idx,
> +                  MT6358_LDO_VCAMD_CON0, 0, MT6358_VCAMD_ANA_CON0, 0xf00, 8),
> +       MT6358_LDO("ldo_vefuse", VEFUSE, vefuse_voltages, vefuse_idx,
> +                  MT6358_LDO_VEFUSE_CON0, 0, MT6358_VEFUSE_ANA_CON0, 0xf00, 8),
> +       MT6358_LDO("ldo_vmch", VMCH, vmch_voltages, vmch_idx,
> +                  MT6358_LDO_VMCH_CON0, 0, MT6358_VMCH_ANA_CON0, 0x700, 8),
> +       MT6358_LDO("ldo_vcama1", VCAMA1, vcama1_voltages, vcama1_idx,
> +                  MT6358_LDO_VCAMA1_CON0, 0, MT6358_VCAMA1_ANA_CON0, 0xf00, 8),
> +       MT6358_LDO("ldo_vemc", VEMC, vemc_voltages, vemc_idx,
> +                  MT6358_LDO_VEMC_CON0, 0, MT6358_VEMC_ANA_CON0, 0x700, 8),
> +       MT6358_LDO("ldo_vcn33_bt", VCN33_BT, vcn33_bt_wifi_voltages,
> +                  vcn33_bt_wifi_idx, MT6358_LDO_VCN33_CON0_0,
> +                  0, MT6358_VCN33_ANA_CON0, 0x300, 8),
> +       MT6358_LDO("ldo_vcn33_wifi", VCN33_WIFI, vcn33_bt_wifi_voltages,
> +                  vcn33_bt_wifi_idx, MT6358_LDO_VCN33_CON0_1,
> +                  0, MT6358_VCN33_ANA_CON0, 0x300, 8),
> +       MT6358_LDO("ldo_vcama2", VCAMA2, vcama2_voltages, vcama2_idx,
> +                  MT6358_LDO_VCAMA2_CON0, 0, MT6358_VCAMA2_ANA_CON0, 0xf00, 8),
> +       MT6358_LDO("ldo_vmc", VMC, vmc_voltages, vmc_idx,
> +                  MT6358_LDO_VMC_CON0, 0, MT6358_VMC_ANA_CON0, 0xf00, 8),
> +       MT6358_LDO("ldo_vldo28", VLDO28, vldo28_voltages, vldo28_idx,
> +                  MT6358_LDO_VLDO28_CON0_0, 0,
> +                  MT6358_VLDO28_ANA_CON0, 0x300, 8),
> +       MT6358_LDO("ldo_vsim2", VSIM2, vsim2_voltages, vsim2_idx,
> +                  MT6358_LDO_VSIM2_CON0, 0, MT6358_VSIM2_ANA_CON0, 0xf00, 8),
> +       MT6358_LDO1("ldo_vsram_proc11", VSRAM_PROC11, 500000, 1293750, 6250,
> +                   buck_volt_range1, MT6358_LDO_VSRAM_PROC11_DBG0, 0x7f, 8,
> +                   MT6358_LDO_VSRAM_CON0, 0x7f),
> +       MT6358_LDO1("ldo_vsram_others", VSRAM_OTHERS, 500000, 1293750, 6250,
> +                   buck_volt_range1, MT6358_LDO_VSRAM_OTHERS_DBG0, 0x7f, 8,
> +                   MT6358_LDO_VSRAM_CON2, 0x7f),
> +       MT6358_LDO1("ldo_vsram_gpu", VSRAM_GPU, 500000, 1293750, 6250,
> +                   buck_volt_range1, MT6358_LDO_VSRAM_GPU_DBG0, 0x7f, 8,
> +                   MT6358_LDO_VSRAM_CON3, 0x7f),
> +       MT6358_LDO1("ldo_vsram_proc12", VSRAM_PROC12, 500000, 1293750, 6250,
> +                   buck_volt_range1, MT6358_LDO_VSRAM_PROC12_DBG0, 0x7f, 8,
> +                   MT6358_LDO_VSRAM_CON1, 0x7f),
> +};
> +
> +static int mt6358_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;
> +
> +       for (i = 0; i < MT6358_MAX_REGULATOR; i++) {
> +               config.dev = &pdev->dev;
> +               config.driver_data = &mt6358_regulators[i];
> +               config.regmap = mt6397->regmap;
> +
> +               rdev = devm_regulator_register(&pdev->dev,
> +                                              &mt6358_regulators[i].desc,
> +                                              &config);
> +               if (IS_ERR(rdev)) {
> +                       dev_err(&pdev->dev, "failed to register %s\n",
> +                               mt6358_regulators[i].desc.name);
> +                       return PTR_ERR(rdev);
> +               }
> +       }
> +
> +       return 0;
> +}
> +
> +static const struct platform_device_id mt6358_platform_ids[] = {
> +       {"mt6358-regulator", 0},
> +       { /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(platform, mt6358_platform_ids);
> +
> +static struct platform_driver mt6358_regulator_driver = {
> +       .driver = {
> +               .name = "mt6358-regulator",
> +       },
> +       .probe = mt6358_regulator_probe,
> +       .id_table = mt6358_platform_ids,
> +};
> +
> +module_platform_driver(mt6358_regulator_driver);
> +
> +MODULE_AUTHOR("Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>");
> +MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6358 PMIC");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/regulator/mt6358-regulator.h b/include/linux/regulator/mt6358-regulator.h
> new file mode 100644
> index 000000000000..1cc304946d09
> --- /dev/null
> +++ b/include/linux/regulator/mt6358-regulator.h
> @@ -0,0 +1,56 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (c) 2019 MediaTek Inc.
> + */
> +
> +#ifndef __LINUX_REGULATOR_MT6358_H
> +#define __LINUX_REGULATOR_MT6358_H
> +
> +enum {
> +       MT6358_ID_VDRAM1 = 0,
> +       MT6358_ID_VCORE,
> +       MT6358_ID_VPA,
> +       MT6358_ID_VPROC11,
> +       MT6358_ID_VPROC12,
> +       MT6358_ID_VGPU,
> +       MT6358_ID_VS2,
> +       MT6358_ID_VMODEM,
> +       MT6358_ID_VS1,
> +       MT6358_ID_VDRAM2 = 9,
> +       MT6358_ID_VSIM1,
> +       MT6358_ID_VIBR,
> +       MT6358_ID_VRF12,
> +       MT6358_ID_VIO18,
> +       MT6358_ID_VUSB,
> +       MT6358_ID_VCAMIO,
> +       MT6358_ID_VCAMD,
> +       MT6358_ID_VCN18,
> +       MT6358_ID_VFE28,
> +       MT6358_ID_VSRAM_PROC11,
> +       MT6358_ID_VCN28,
> +       MT6358_ID_VSRAM_OTHERS,
> +       MT6358_ID_VSRAM_GPU,
> +       MT6358_ID_VXO22,
> +       MT6358_ID_VEFUSE,
> +       MT6358_ID_VAUX18,
> +       MT6358_ID_VMCH,
> +       MT6358_ID_VBIF28,
> +       MT6358_ID_VSRAM_PROC12,
> +       MT6358_ID_VCAMA1,
> +       MT6358_ID_VEMC,
> +       MT6358_ID_VIO28,
> +       MT6358_ID_VA12,
> +       MT6358_ID_VRF18,
> +       MT6358_ID_VCN33_BT,
> +       MT6358_ID_VCN33_WIFI,
> +       MT6358_ID_VCAMA2,
> +       MT6358_ID_VMC,
> +       MT6358_ID_VLDO28,
> +       MT6358_ID_VAUD28,
> +       MT6358_ID_VSIM2,
> +       MT6358_ID_RG_MAX,
> +};
> +
> +#define MT6358_MAX_REGULATOR   MT6358_ID_RG_MAX
> +
> +#endif /* __LINUX_REGULATOR_MT6358_H */
> --
> 2.18.0
>
>
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