power: regulator: add MediaTek MT6357 driver

Add a driver for the power regulators of the MediaTek MT6357 PMIC chip.

Signed-off-by: Julien Masson <[email protected]>
Co-developed-by: Macpaul Lin <[email protected]>
Signed-off-by: Macpaul Lin <[email protected]>
Signed-off-by: David Lechner <[email protected]>
Signed-off-by: Peng Fan <[email protected]>

3 files changed, 522 insertions, 0 deletions

diff --git a/drivers/power/regulator/Kconfig b/drivers/power/regulator/Kconfig
index bd9ccd26981..60f20213bad 100644
--- a/drivers/power/regulator/Kconfig
+++ b/drivers/power/regulator/Kconfig
@@ -521,3 +521,12 @@ config DM_REGULATOR_CPCAP
 	REGULATOR CPCAP. The driver supports both DC-to-DC Step-Down Switching
 	(SW) Regulators and Low-Dropout Linear (LDO) Regulators	found in CPCAP
 	PMIC and implements get/set api for voltage and state.
+
+config DM_REGULATOR_MT6357
+	bool "Enable driver for MediaTek MT6357 PMIC regulators"
+	depends on DM_REGULATOR && DM_PMIC_MTK_PWRAP
+	help
+	  Say y here to select this option to enable the power regulator of
+	  MediaTek MT6357 PMIC.
+	  This driver supports the control of different power rails of device
+	  through regulator interface.
diff --git a/drivers/power/regulator/Makefile b/drivers/power/regulator/Makefile
index ee8f56ea3b9..72acea28859 100644
--- a/drivers/power/regulator/Makefile
+++ b/drivers/power/regulator/Makefile
@@ -47,3 +47,4 @@ obj-$(CONFIG_$(PHASE_)DM_REGULATOR_ANATOP) += anatop_regulator.o
 obj-$(CONFIG_DM_REGULATOR_TPS65219) += tps65219_regulator.o
 obj-$(CONFIG_REGULATOR_RZG2L_USBPHY) += rzg2l-usbphy-regulator.o
 obj-$(CONFIG_$(PHASE_)DM_REGULATOR_CPCAP) += cpcap_regulator.o
+obj-$(CONFIG_DM_REGULATOR_MT6357) += mt6357_regulator.o
diff --git a/drivers/power/regulator/mt6357_regulator.c b/drivers/power/regulator/mt6357_regulator.c
new file mode 100644
index 00000000000..533cc22b93a
--- /dev/null
+++ b/drivers/power/regulator/mt6357_regulator.c
@@ -0,0 +1,512 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * MT6357 regulator driver
+ *
+ * Copyright (c) 2026 BayLibre, SAS.
+ * Author: Julien Masson <[email protected]>
+ */
+
+#include <dm.h>
+#include <power/regulator.h>
+#include <power/mt6357.h>
+#include <power/pmic.h>
+
+enum mt6357_regulator_type {
+	MT6357_REG_TYPE_RANGE,
+	MT6357_REG_TYPE_TABLE,
+	MT6357_REG_TYPE_FIXED,
+};
+
+struct mt6357_linear_range {
+	unsigned int min;
+	unsigned int min_sel;
+	unsigned int max_sel;
+	unsigned int step;
+};
+
+struct mt6357_regulator_desc {
+	const char *name;
+	const char *of_match;
+	enum mt6357_regulator_type type;
+	int id;
+	unsigned int n_voltages;
+	const unsigned int *volt_table;
+	const struct mt6357_linear_range *linear_ranges;
+	int n_linear_ranges;
+	unsigned int min_uV;
+	unsigned int vsel_reg;
+	unsigned int vsel_mask;
+	unsigned int enable_reg;
+	unsigned int enable_mask;
+};
+
+struct mt6357_regulator_info {
+	struct mt6357_regulator_desc desc;
+	const u32 *index_table;
+	unsigned int n_table;
+	u32 vsel_shift;
+	u32 da_vsel_reg;
+	u32 da_vsel_mask;
+	u32 da_vsel_shift;
+};
+
+/* Initialize struct mt6357_linear_range for regulators */
+#define REGULATOR_LINEAR_RANGE(_min_uV, _min_sel, _max_sel, _step_uV)	\
+{									\
+	.min		= _min_uV,					\
+	.min_sel	= _min_sel,					\
+	.max_sel	= _max_sel,					\
+	.step		= _step_uV,					\
+}
+
+#define MT6357_BUCK(match, vreg, min, max, step,			\
+		    volt_ranges, vosel_reg, vosel_mask, _da_vsel_mask)	\
+	[MT6357_ID_##vreg] = {						\
+		.desc = {						\
+			.name = #vreg,					\
+			.of_match = of_match_ptr(match),		\
+			.type = MT6357_REG_TYPE_RANGE,			\
+			.id = MT6357_ID_##vreg,				\
+			.n_voltages = ((max) - (min)) / (step) + 1,	\
+			.linear_ranges = volt_ranges,			\
+			.n_linear_ranges = ARRAY_SIZE(volt_ranges),	\
+			.vsel_reg = vosel_reg,				\
+			.vsel_mask = vosel_mask,			\
+			.enable_reg = MT6357_BUCK_##vreg##_CON0,	\
+			.enable_mask = BIT(0),				\
+		},							\
+		.da_vsel_reg = MT6357_BUCK_##vreg##_DBG0,		\
+		.da_vsel_mask = _da_vsel_mask,				\
+		.da_vsel_shift = 0,					\
+	}
+
+#define MT6357_LDO(match, vreg, ldo_volt_table,				\
+		   ldo_index_table, enreg, vosel,			\
+		   vosel_mask)						\
+	[MT6357_ID_##vreg] = {						\
+		.desc = {						\
+			.name = #vreg,					\
+			.of_match = of_match_ptr(match),		\
+			.type = MT6357_REG_TYPE_TABLE,			\
+			.id = MT6357_ID_##vreg,				\
+			.n_voltages = ARRAY_SIZE(ldo_volt_table),	\
+			.volt_table = ldo_volt_table,			\
+			.vsel_reg = vosel,				\
+			.vsel_mask = vosel_mask << 8,			\
+			.enable_reg = enreg,				\
+			.enable_mask = BIT(0),				\
+		},							\
+		.index_table = ldo_index_table,				\
+		.n_table = ARRAY_SIZE(ldo_index_table),			\
+	}
+
+#define MT6357_LDO1(match, vreg, min, max, step, volt_ranges,		\
+		    enreg, vosel, vosel_mask)				\
+	[MT6357_ID_##vreg] = {						\
+		.desc = {						\
+			.name = #vreg,					\
+			.of_match = of_match_ptr(match),		\
+			.type = MT6357_REG_TYPE_RANGE,			\
+			.id = MT6357_ID_##vreg,				\
+			.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),				\
+		},							\
+		.da_vsel_reg = MT6357_LDO_##vreg##_DBG0,		\
+		.da_vsel_mask = 0x7f,					\
+		.da_vsel_shift = 8,					\
+	}
+
+#define MT6357_REG_FIXED(match, vreg, volt)				\
+	[MT6357_ID_##vreg] = {						\
+		.desc = {						\
+			.name = #vreg,					\
+			.of_match = of_match_ptr(match),		\
+			.type = MT6357_REG_TYPE_FIXED,			\
+			.id = MT6357_ID_##vreg,				\
+			.n_voltages = 1,				\
+			.enable_reg = MT6357_LDO_##vreg##_CON0,		\
+			.enable_mask = BIT(0),				\
+			.min_uV = volt,					\
+		},							\
+	}
+
+static int mt6357_range_find_value(const struct mt6357_linear_range *r,
+				   unsigned int sel,
+				   unsigned int *val)
+{
+	if (!val || sel < r->min_sel || sel > r->max_sel)
+		return -EINVAL;
+
+	*val = r->min + r->step * (sel - r->min_sel);
+
+	return 0;
+}
+
+static int mt6357_range_find_selector(const struct mt6357_linear_range *r,
+				      int val, unsigned int *sel)
+{
+	int num_vals = r->max_sel - r->min_sel + 1;
+	int ret = -EINVAL;
+
+	if (val >= r->min && val <= r->min + r->step * (num_vals - 1)) {
+		if (r->step) {
+			*sel = r->min_sel + ((val - r->min) / r->step);
+			ret = 0;
+		} else {
+			*sel = r->min_sel;
+			ret = 0;
+		}
+	}
+	return ret;
+}
+
+static int mt6357_get_enable(struct udevice *dev)
+{
+	struct mt6357_regulator_info *info = dev_get_priv(dev);
+	int ret;
+
+	ret = pmic_reg_read(dev->parent, info->desc.enable_reg);
+	if (ret < 0)
+		return ret;
+
+	return ret & info->desc.enable_mask ? true : false;
+}
+
+static int mt6357_set_enable(struct udevice *dev, bool enable)
+{
+	struct mt6357_regulator_info *info = dev_get_priv(dev);
+
+	return pmic_clrsetbits(dev->parent, info->desc.enable_reg,
+			       info->desc.enable_mask,
+			       enable ? info->desc.enable_mask : 0);
+}
+
+static int mt6357_get_value(struct udevice *dev)
+{
+	struct mt6357_regulator_info *info = dev_get_priv(dev);
+	unsigned int val_uV;
+	int selector, idx, ret;
+	const u32 *pvol;
+
+	switch (info->desc.type) {
+	case MT6357_REG_TYPE_RANGE:
+		selector = pmic_reg_read(dev->parent, info->da_vsel_reg);
+		if (selector < 0)
+			return selector;
+
+		selector = (selector & info->da_vsel_mask) >> info->da_vsel_shift;
+		ret = mt6357_range_find_value(info->desc.linear_ranges, selector, &val_uV);
+		if (ret < 0)
+			return ret;
+
+		return val_uV;
+	case MT6357_REG_TYPE_TABLE:
+		selector = pmic_reg_read(dev->parent, info->desc.vsel_reg);
+		if (selector < 0)
+			return selector;
+
+		selector = (selector & info->desc.vsel_mask) >> 8;
+		pvol = info->index_table;
+
+		for (idx = 0; idx < info->desc.n_voltages; idx++) {
+			if (pvol[idx] == selector)
+				return info->desc.volt_table[idx];
+		}
+
+		return -EINVAL;
+	case MT6357_REG_TYPE_FIXED:
+		return info->desc.min_uV;
+	default:
+		return -EINVAL;
+	}
+}
+
+static int mt6357_set_value(struct udevice *dev, int uvolt)
+{
+	struct mt6357_regulator_info *info = dev_get_priv(dev);
+	int selector, idx, ret;
+	const u32 *pvol;
+
+	switch (info->desc.type) {
+	case MT6357_REG_TYPE_RANGE:
+		ret = mt6357_range_find_selector(info->desc.linear_ranges, uvolt,
+						 &selector);
+		if (ret < 0)
+			return ret;
+
+		return pmic_clrsetbits(dev->parent, info->desc.vsel_reg,
+				       info->desc.vsel_mask, selector);
+	case MT6357_REG_TYPE_TABLE:
+		pvol = info->desc.volt_table;
+
+		for (idx = 0; idx < info->desc.n_voltages; idx++) {
+			if (pvol[idx] == uvolt) {
+				selector = info->index_table[idx];
+
+				return pmic_clrsetbits(dev->parent, info->desc.vsel_reg,
+						       info->desc.vsel_mask, selector << 8);
+			}
+		}
+
+		return -EINVAL;
+	default:
+		return -EINVAL;
+	}
+}
+
+static const int vxo22_voltages[] = {
+	2200000,
+	2400000,
+};
+
+static const int vefuse_voltages[] = {
+	1200000,
+	1300000,
+	1500000,
+	1800000,
+	2800000,
+	2900000,
+	3000000,
+	3300000,
+};
+
+static const int vcn33_voltages[] = {
+	3300000,
+	3400000,
+	3500000,
+};
+
+static const int vcama_voltages[] = {
+	2500000,
+	2800000,
+};
+
+static const int vcamd_voltages[] = {
+	1000000,
+	1100000,
+	1200000,
+	1300000,
+	1500000,
+	1800000,
+};
+
+static const int vldo28_voltages[] = {
+	2800000,
+	3000000,
+};
+
+static const int vdram_voltages[] = {
+	1100000,
+	1200000,
+};
+
+static const int vsim_voltages[] = {
+	1700000,
+	1800000,
+	2700000,
+	3000000,
+	3100000,
+};
+
+static const int vibr_voltages[] = {
+	1200000,
+	1300000,
+	1500000,
+	1800000,
+	2000000,
+	2800000,
+	3000000,
+	3300000,
+};
+
+static const int vmc_voltages[] = {
+	1800000,
+	2900000,
+	3000000,
+	3300000,
+};
+
+static const int vmch_voltages[] = {
+	2900000,
+	3000000,
+	3300000,
+};
+
+static const int vemc_voltages[] = {
+	2900000,
+	3000000,
+	3300000,
+};
+
+static const int vusb_voltages[] = {
+	3000000,
+	3100000,
+};
+
+static const int vmc_idx[] = {
+	4, 10, 11, 13,
+};
+
+static const int vmch_idx[] = {
+	2, 3, 5,
+};
+
+static const int vemc_idx[] = {
+	2, 3, 5,
+};
+
+static const int vusb_idx[] = {
+	3, 4,
+};
+
+static const int vxo22_idx[] = {
+	0, 2,
+};
+
+static const int vefuse_idx[] = {
+	0, 1, 2, 4, 9, 10, 11, 13,
+};
+
+static const int vcn33_idx[] = {
+	1, 2, 3,
+};
+
+static const int vcama_idx[] = {
+	7, 10,
+};
+
+static const int vcamd_idx[] = {
+	4, 5, 6, 7, 9, 12,
+};
+
+static const int vldo28_idx[] = {
+	1, 3,
+};
+
+static const int vdram_idx[] = {
+	1, 2,
+};
+
+static const int vsim_idx[] = {
+	3, 4, 8, 11, 12,
+};
+
+static const int vibr_idx[] = {
+	0, 1, 2, 4, 5, 9, 11, 13,
+};
+
+static const struct mt6357_linear_range buck_volt_range1[] = {
+	REGULATOR_LINEAR_RANGE(518750, 0, 0x7f, 6250),
+};
+
+static const struct mt6357_linear_range buck_volt_range2[] = {
+	REGULATOR_LINEAR_RANGE(500000, 0, 0x7f, 6250),
+};
+
+static const struct mt6357_linear_range buck_volt_range3[] = {
+	REGULATOR_LINEAR_RANGE(500000, 0, 0x3f, 50000),
+};
+
+static const struct mt6357_linear_range buck_volt_range4[] = {
+	REGULATOR_LINEAR_RANGE(1200000, 0, 0x7f, 12500),
+};
+
+/* The array is indexed by id(MT6357_ID_XXX) */
+static struct mt6357_regulator_info mt6357_regulators[] = {
+	/* Bucks */
+	MT6357_BUCK("buck-vcore", VCORE, 518750, 1312500, 6250,
+		    buck_volt_range1, MT6357_BUCK_VCORE_ELR0, 0x7f, 0x7f),
+	MT6357_BUCK("buck-vproc", VPROC, 518750, 1312500, 6250,
+		    buck_volt_range1, MT6357_BUCK_VPROC_ELR0, 0x7f, 0x7f),
+	MT6357_BUCK("buck-vmodem", VMODEM, 500000, 1293750, 6250,
+		    buck_volt_range2, MT6357_BUCK_VMODEM_ELR0, 0x7f, 0x7f),
+	MT6357_BUCK("buck-vpa", VPA, 500000, 3650000, 50000,
+		    buck_volt_range3, MT6357_BUCK_VPA_CON1, 0x3f, 0x3f),
+	MT6357_BUCK("buck-vs1", VS1, 1200000, 2787500, 12500,
+		    buck_volt_range4, MT6357_BUCK_VS1_ELR0, 0x7f, 0x7f),
+
+	/* LDOs */
+	MT6357_LDO("ldo-vcama", VCAMA, vcama_voltages, vcama_idx,
+		   MT6357_LDO_VCAMA_CON0, MT6357_VCAMA_ANA_CON0, 0xf),
+	MT6357_LDO("ldo-vcamd", VCAMD, vcamd_voltages, vcamd_idx,
+		   MT6357_LDO_VCAMD_CON0, MT6357_VCAMD_ANA_CON0, 0xf),
+	MT6357_LDO("ldo-vcn33-bt", VCN33_BT, vcn33_voltages, vcn33_idx,
+		   MT6357_LDO_VCN33_CON0_0, MT6357_VCN33_ANA_CON0, 0x3),
+	MT6357_LDO("ldo-vcn33-wifi", VCN33_WIFI, vcn33_voltages, vcn33_idx,
+		   MT6357_LDO_VCN33_CON0_1, MT6357_VCN33_ANA_CON0, 0x3),
+	MT6357_LDO("ldo-vdram", VDRAM, vdram_voltages, vdram_idx,
+		   MT6357_LDO_VDRAM_CON0, MT6357_VDRAM_ELR_2, 0x3),
+	MT6357_LDO("ldo-vefuse", VEFUSE, vefuse_voltages, vefuse_idx,
+		   MT6357_LDO_VEFUSE_CON0, MT6357_VEFUSE_ANA_CON0, 0xf),
+	MT6357_LDO("ldo-vemc", VEMC, vemc_voltages, vemc_idx,
+		   MT6357_LDO_VEMC_CON0, MT6357_VEMC_ANA_CON0, 0x7),
+	MT6357_LDO("ldo-vibr", VIBR, vibr_voltages, vibr_idx,
+		   MT6357_LDO_VIBR_CON0, MT6357_VIBR_ANA_CON0, 0xf),
+	MT6357_LDO("ldo-vldo28", VLDO28, vldo28_voltages, vldo28_idx,
+		   MT6357_LDO_VLDO28_CON0_0, MT6357_VLDO28_ANA_CON0, 0x3),
+	MT6357_LDO("ldo-vmc", VMC, vmc_voltages, vmc_idx,
+		   MT6357_LDO_VMC_CON0, MT6357_VMC_ANA_CON0, 0xf),
+	MT6357_LDO("ldo-vmch", VMCH, vmch_voltages, vmch_idx,
+		   MT6357_LDO_VMCH_CON0, MT6357_VMCH_ANA_CON0, 0x7),
+	MT6357_LDO("ldo-vsim1", VSIM1, vsim_voltages, vsim_idx,
+		   MT6357_LDO_VSIM1_CON0, MT6357_VSIM1_ANA_CON0, 0xf),
+	MT6357_LDO("ldo-vsim2", VSIM2, vsim_voltages, vsim_idx,
+		   MT6357_LDO_VSIM2_CON0, MT6357_VSIM2_ANA_CON0, 0xf),
+	MT6357_LDO("ldo-vusb33", VUSB33, vusb_voltages, vusb_idx,
+		   MT6357_LDO_VUSB33_CON0_0, MT6357_VUSB33_ANA_CON0, 0x7),
+	MT6357_LDO("ldo-vxo22", VXO22, vxo22_voltages, vxo22_idx,
+		   MT6357_LDO_VXO22_CON0, MT6357_VXO22_ANA_CON0, 0x3),
+
+	MT6357_LDO1("ldo-vsram-proc", VSRAM_PROC, 518750, 1312500, 6250,
+		    buck_volt_range1, MT6357_LDO_VSRAM_PROC_CON0,
+		    MT6357_LDO_VSRAM_CON0, 0x7f),
+	MT6357_LDO1("ldo-vsram-others", VSRAM_OTHERS, 518750, 1312500, 6250,
+		    buck_volt_range1, MT6357_LDO_VSRAM_OTHERS_CON0,
+		    MT6357_LDO_VSRAM_CON1, 0x7f),
+
+	MT6357_REG_FIXED("ldo-vaud28", VAUD28, 2800000),
+	MT6357_REG_FIXED("ldo-vaux18", VAUX18, 1800000),
+	MT6357_REG_FIXED("ldo-vcamio18", VCAMIO, 1800000),
+	MT6357_REG_FIXED("ldo-vcn18", VCN18, 1800000),
+	MT6357_REG_FIXED("ldo-vcn28", VCN28, 2800000),
+	MT6357_REG_FIXED("ldo-vfe28", VFE28, 2800000),
+	MT6357_REG_FIXED("ldo-vio18", VIO18, 1800000),
+	MT6357_REG_FIXED("ldo-vio28", VIO28, 2800000),
+	MT6357_REG_FIXED("ldo-vrf12", VRF12, 1200000),
+	MT6357_REG_FIXED("ldo-vrf18", VRF18, 1800000),
+};
+
+static int mt6357_regulator_probe(struct udevice *dev)
+{
+	struct mt6357_regulator_info *priv = dev_get_priv(dev);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(mt6357_regulators); i++) {
+		if (!strcmp(dev->name, mt6357_regulators[i].desc.of_match)) {
+			*priv = mt6357_regulators[i];
+			return 0;
+		}
+	}
+
+	return -ENOENT;
+}
+
+static const struct dm_regulator_ops mt6357_regulator_ops = {
+	.get_value  = mt6357_get_value,
+	.set_value  = mt6357_set_value,
+	.get_enable = mt6357_get_enable,
+	.set_enable = mt6357_set_enable,
+};
+
+U_BOOT_DRIVER(mt6357_regulator) = {
+	.name	   = MT6357_REGULATOR_DRIVER,
+	.id	   = UCLASS_REGULATOR,
+	.ops	   = &mt6357_regulator_ops,
+	.probe	   = mt6357_regulator_probe,
+	.priv_auto = sizeof(struct mt6357_regulator_info),
+};