regulator: Add regulator driver for Unisoc SC2730 PMIC

Add a regulator driver for the Spreadtrum/Unisoc SC2730 PMIC, used
e.g. with the UMS512 and UMS9230 SoCs. This version of the driver is
based on a downstream driver provided by Unisoc [1][2] and the existing
SC2731 driver.

[1]: https://github.com/MotorolaMobilityLLC/kernel-sprd/commit/30be0ddfe6b9a877fc9c328fbd2bae84e645eb31
[2]: https://github.com/MotorolaMobilityLLC/kernel-sprd/blob/android-13-release-tla33/drivers/regulator/sc2730-regulator.c

Signed-off-by: Zhongfa Wang <zhongfa.wang@unisoc.com>
[cleanup, adapt to new device tree requirements]
Signed-off-by: Otto Pflüger <otto.pflueger@abscue.de>
Link: https://patch.msgid.link/20260701-sc2730-regulators-v7-2-6e145ce83657@abscue.de
Signed-off-by: Mark Brown <broonie@kernel.org>

3 files changed, 383 insertions, 0 deletions

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index a54a549196fe..89789ac7a786 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -1477,6 +1477,13 @@ config REGULATOR_S5M8767
 	 via I2C bus. S5M8767A have 9 Bucks and 28 LDOs output and
 	 supports DVS mode with 8bits of output voltage control.
 
+config REGULATOR_SC2730
+	tristate "Spreadtrum SC2730 power regulator driver"
+	depends on MFD_SC27XX_PMIC || COMPILE_TEST
+	help
+	  This driver provides support for the voltage regulators on the
+	  SC2730 PMIC.
+
 config REGULATOR_SC2731
 	tristate "Spreadtrum SC2731 power regulator driver"
 	depends on MFD_SC27XX_PMIC || COMPILE_TEST
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 134eee274dbf..5a764cec8df8 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -170,6 +170,7 @@ obj-$(CONFIG_REGULATOR_S2DOS05) += s2dos05-regulator.o
 obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
 obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
 obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
+obj-$(CONFIG_REGULATOR_SC2730) += sc2730-regulator.o
 obj-$(CONFIG_REGULATOR_SC2731) += sc2731-regulator.o
 obj-$(CONFIG_REGULATOR_SGM3804) += sgm3804-regulator.o
 obj-$(CONFIG_REGULATOR_SKY81452) += sky81452-regulator.o
diff --git a/drivers/regulator/sc2730-regulator.c b/drivers/regulator/sc2730-regulator.c
new file mode 100644
index 000000000000..166b19ed539b
--- /dev/null
+++ b/drivers/regulator/sc2730-regulator.c
@@ -0,0 +1,375 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018-2021 Unisoc Inc.
+ */
+
+#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/of_regulator.h>
+
+/*
+ * SC2730 regulator base address
+ */
+#define SC2730_REGULATOR_BASE		0x1800
+
+/*
+ * SC2730 regulator lock register
+ */
+#define SC2730_WR_UNLOCK_VALUE		0x6e7f
+#define SC2730_PWR_WR_PROT		(SC2730_REGULATOR_BASE + 0x3d0)
+
+/*
+ * SC2730 enable register
+ */
+#define SC2730_POWER_PD_SW		(SC2730_REGULATOR_BASE + 0x01c)
+#define SC2730_LDO_VDDRF18_PD		(SC2730_REGULATOR_BASE + 0x10c)
+#define SC2730_LDO_VDDCAMIO_PD		(SC2730_REGULATOR_BASE + 0x118)
+#define SC2730_LDO_VDDWCN_PD		(SC2730_REGULATOR_BASE + 0x11c)
+#define SC2730_LDO_VDDCAMD1_PD		(SC2730_REGULATOR_BASE + 0x128)
+#define SC2730_LDO_VDDCAMD0_PD		(SC2730_REGULATOR_BASE + 0x134)
+#define SC2730_LDO_VDDRF1V25_PD		(SC2730_REGULATOR_BASE + 0x140)
+#define SC2730_LDO_AVDD12_PD		(SC2730_REGULATOR_BASE + 0x14c)
+#define SC2730_LDO_VDDCAMA0_PD		(SC2730_REGULATOR_BASE + 0x158)
+#define SC2730_LDO_VDDCAMA1_PD		(SC2730_REGULATOR_BASE + 0x164)
+#define SC2730_LDO_VDDCAMMOT_PD		(SC2730_REGULATOR_BASE + 0x170)
+#define SC2730_LDO_VDDSIM2_PD		(SC2730_REGULATOR_BASE + 0x194)
+#define SC2730_LDO_VDDEMMCCORE_PD	(SC2730_REGULATOR_BASE + 0x1a0)
+#define SC2730_LDO_VDDSDCORE_PD		(SC2730_REGULATOR_BASE + 0x1ac)
+#define SC2730_LDO_VDDSDIO_PD		(SC2730_REGULATOR_BASE + 0x1b8)
+#define SC2730_LDO_VDDWIFIPA_PD		(SC2730_REGULATOR_BASE + 0x1d0)
+#define SC2730_LDO_VDDUSB33_PD		(SC2730_REGULATOR_BASE + 0x1e8)
+#define SC2730_LDO_VDDLDO0_PD		(SC2730_REGULATOR_BASE + 0x1f4)
+#define SC2730_LDO_VDDLDO1_PD		(SC2730_REGULATOR_BASE + 0x200)
+#define SC2730_LDO_VDDLDO2_PD		(SC2730_REGULATOR_BASE + 0x20c)
+#define SC2730_LDO_VDDKPLED_PD		(SC2730_REGULATOR_BASE + 0x38c)
+
+/*
+ * SC2730 enable mask
+ */
+#define SC2730_DCDC_CPU_PD_MASK		BIT(4)
+#define SC2730_DCDC_GPU_PD_MASK		BIT(3)
+#define SC2730_DCDC_CORE_PD_MASK	BIT(5)
+#define SC2730_DCDC_MODEM_PD_MASK	BIT(11)
+#define SC2730_DCDC_MEM_PD_MASK		BIT(6)
+#define SC2730_DCDC_MEMQ_PD_MASK	BIT(12)
+#define SC2730_DCDC_GEN0_PD_MASK	BIT(8)
+#define SC2730_DCDC_GEN1_PD_MASK	BIT(7)
+#define SC2730_DCDC_SRAM_PD_MASK	BIT(13)
+#define SC2730_LDO_AVDD18_PD_MASK	BIT(2)
+#define SC2730_LDO_VDDRF18_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDCAMIO_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDWCN_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDCAMD1_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDCAMD0_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDRF1V25_PD_MASK	BIT(0)
+#define SC2730_LDO_AVDD12_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDCAMA0_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDCAMA1_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDCAMMOT_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDSIM2_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDEMMCCORE_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDSDCORE_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDSDIO_PD_MASK	BIT(0)
+#define SC2730_LDO_VDD28_PD_MASK	BIT(1)
+#define SC2730_LDO_VDDWIFIPA_PD_MASK	BIT(0)
+#define SC2730_LDO_VDD18_DCXO_PD_MASK	BIT(10)
+#define SC2730_LDO_VDDUSB33_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDLDO0_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDLDO1_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDLDO2_PD_MASK	BIT(0)
+#define SC2730_LDO_VDDKPLED_PD_MASK	BIT(15)
+
+/*
+ * SC2730 vsel register
+ */
+#define SC2730_DCDC_CPU_VOL		(SC2730_REGULATOR_BASE + 0x44)
+#define SC2730_DCDC_GPU_VOL		(SC2730_REGULATOR_BASE + 0x54)
+#define SC2730_DCDC_CORE_VOL		(SC2730_REGULATOR_BASE + 0x64)
+#define SC2730_DCDC_MODEM_VOL		(SC2730_REGULATOR_BASE + 0x74)
+#define SC2730_DCDC_MEM_VOL		(SC2730_REGULATOR_BASE + 0x84)
+#define SC2730_DCDC_MEMQ_VOL		(SC2730_REGULATOR_BASE + 0x94)
+#define SC2730_DCDC_GEN0_VOL		(SC2730_REGULATOR_BASE + 0xa4)
+#define SC2730_DCDC_GEN1_VOL		(SC2730_REGULATOR_BASE + 0xb4)
+#define SC2730_DCDC_SRAM_VOL		(SC2730_REGULATOR_BASE + 0xdc)
+#define SC2730_LDO_AVDD18_VOL		(SC2730_REGULATOR_BASE + 0x104)
+#define SC2730_LDO_VDDRF18_VOL		(SC2730_REGULATOR_BASE + 0x110)
+#define SC2730_LDO_VDDCAMIO_VOL		(SC2730_REGULATOR_BASE + 0x28)
+#define SC2730_LDO_VDDWCN_VOL		(SC2730_REGULATOR_BASE + 0x120)
+#define SC2730_LDO_VDDCAMD1_VOL		(SC2730_REGULATOR_BASE + 0x12c)
+#define SC2730_LDO_VDDCAMD0_VOL		(SC2730_REGULATOR_BASE + 0x138)
+#define SC2730_LDO_VDDRF1V25_VOL	(SC2730_REGULATOR_BASE + 0x144)
+#define SC2730_LDO_AVDD12_VOL		(SC2730_REGULATOR_BASE + 0x150)
+#define SC2730_LDO_VDDCAMA0_VOL		(SC2730_REGULATOR_BASE + 0x15c)
+#define SC2730_LDO_VDDCAMA1_VOL		(SC2730_REGULATOR_BASE + 0x168)
+#define SC2730_LDO_VDDCAMMOT_VOL	(SC2730_REGULATOR_BASE + 0x174)
+#define SC2730_LDO_VDDSIM2_VOL		(SC2730_REGULATOR_BASE + 0x198)
+#define SC2730_LDO_VDDEMMCCORE_VOL	(SC2730_REGULATOR_BASE + 0x1a4)
+#define SC2730_LDO_VDDSDCORE_VOL	(SC2730_REGULATOR_BASE + 0x1b0)
+#define SC2730_LDO_VDDSDIO_VOL		(SC2730_REGULATOR_BASE + 0x1bc)
+#define SC2730_LDO_VDD28_VOL		(SC2730_REGULATOR_BASE + 0x1c8)
+#define SC2730_LDO_VDDWIFIPA_VOL	(SC2730_REGULATOR_BASE + 0x1d4)
+#define SC2730_LDO_VDD18_DCXO_VOL	(SC2730_REGULATOR_BASE + 0x1e0)
+#define SC2730_LDO_VDDUSB33_VOL		(SC2730_REGULATOR_BASE + 0x1ec)
+#define SC2730_LDO_VDDLDO0_VOL		(SC2730_REGULATOR_BASE + 0x1f8)
+#define SC2730_LDO_VDDLDO1_VOL		(SC2730_REGULATOR_BASE + 0x204)
+#define SC2730_LDO_VDDLDO2_VOL		(SC2730_REGULATOR_BASE + 0x210)
+#define SC2730_LDO_VDDKPLED_VOL		(SC2730_REGULATOR_BASE + 0x38c)
+
+/*
+ * SC2730 vsel register mask
+ */
+#define SC2730_DCDC_CPU_VOL_MASK	GENMASK(8, 0)
+#define SC2730_DCDC_GPU_VOL_MASK	GENMASK(8, 0)
+#define SC2730_DCDC_CORE_VOL_MASK	GENMASK(8, 0)
+#define SC2730_DCDC_MODEM_VOL_MASK	GENMASK(8, 0)
+#define SC2730_DCDC_MEM_VOL_MASK	GENMASK(7, 0)
+#define SC2730_DCDC_MEMQ_VOL_MASK	GENMASK(8, 0)
+#define SC2730_DCDC_GEN0_VOL_MASK	GENMASK(7, 0)
+#define SC2730_DCDC_GEN1_VOL_MASK	GENMASK(7, 0)
+#define SC2730_DCDC_SRAM_VOL_MASK	GENMASK(8, 0)
+#define SC2730_LDO_AVDD18_VOL_MASK	GENMASK(5, 0)
+#define SC2730_LDO_VDDRF18_VOL_MASK	GENMASK(5, 0)
+#define SC2730_LDO_VDDCAMIO_VOL_MASK	GENMASK(5, 0)
+#define SC2730_LDO_VDDWCN_VOL_MASK	GENMASK(5, 0)
+#define SC2730_LDO_VDDCAMD1_VOL_MASK	GENMASK(4, 0)
+#define SC2730_LDO_VDDCAMD0_VOL_MASK	GENMASK(4, 0)
+#define SC2730_LDO_VDDRF1V25_VOL_MASK	GENMASK(4, 0)
+#define SC2730_LDO_AVDD12_VOL_MASK	GENMASK(4, 0)
+#define SC2730_LDO_VDDCAMA0_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDDCAMA1_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDDCAMMOT_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDDSIM2_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDDEMMCCORE_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDDSDCORE_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDDSDIO_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDD28_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDDWIFIPA_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDD18_DCXO_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDDUSB33_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDDLDO0_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDDLDO1_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDDLDO2_VOL_MASK	GENMASK(7, 0)
+#define SC2730_LDO_VDDKPLED_VOL_MASK	GENMASK(14, 7)
+
+enum sc2730_regulator_id {
+	SC2730_DCDC_CPU,
+	SC2730_DCDC_GPU,
+	SC2730_DCDC_CORE,
+	SC2730_DCDC_MODEM,
+	SC2730_DCDC_MEM,
+	SC2730_DCDC_MEMQ,
+	SC2730_DCDC_GEN0,
+	SC2730_DCDC_GEN1,
+	SC2730_DCDC_SRAM,
+	SC2730_LDO_AVDD18,
+	SC2730_LDO_VDDRF18,
+	SC2730_LDO_VDDCAMIO,
+	SC2730_LDO_VDDWCN,
+	SC2730_LDO_VDDCAMD1,
+	SC2730_LDO_VDDCAMD0,
+	SC2730_LDO_VDDRF1V25,
+	SC2730_LDO_AVDD12,
+	SC2730_LDO_VDDCAMA0,
+	SC2730_LDO_VDDCAMA1,
+	SC2730_LDO_VDDCAMMOT,
+	SC2730_LDO_VDDSIM2,
+	SC2730_LDO_VDDEMMCCORE,
+	SC2730_LDO_VDDSDCORE,
+	SC2730_LDO_VDDSDIO,
+	SC2730_LDO_VDD28,
+	SC2730_LDO_VDDWIFIPA,
+	SC2730_LDO_VDD18_DCXO,
+	SC2730_LDO_VDDUSB33,
+	SC2730_LDO_VDDLDO0,
+	SC2730_LDO_VDDLDO1,
+	SC2730_LDO_VDDLDO2,
+	SC2730_LDO_VDDKPLED,
+};
+
+static const struct regulator_ops sc2730_regu_linear_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_voltage_linear,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+};
+
+#define SC2730_REGU_LINEAR(_id, of_name, en_reg, en_mask, vreg, vmask,	\
+			   vstep, vmin, vmax) {				\
+	.name			= #_id,					\
+	.of_match		= of_name,				\
+	.regulators_node	= "regulators",				\
+	.ops			= &sc2730_regu_linear_ops,		\
+	.type			= REGULATOR_VOLTAGE,			\
+	.id			= SC2730_##_id,				\
+	.owner			= THIS_MODULE,				\
+	.min_uV			= vmin,					\
+	.n_voltages		= ((vmax) - (vmin)) / (vstep) + 1,	\
+	.uV_step		= vstep,				\
+	.enable_is_inverted	= true,					\
+	.enable_val		= 0,					\
+	.enable_reg		= en_reg,				\
+	.enable_mask		= en_mask,				\
+	.vsel_reg		= vreg,					\
+	.vsel_mask		= vmask,				\
+	.linear_min_sel		= 0,					\
+}
+
+static const struct regulator_desc regulators[] = {
+	SC2730_REGU_LINEAR(DCDC_CPU, "dcdc-cpu", SC2730_POWER_PD_SW,
+			   SC2730_DCDC_CPU_PD_MASK, SC2730_DCDC_CPU_VOL,
+			   SC2730_DCDC_CPU_VOL_MASK, 3125, 0, 1596875),
+	SC2730_REGU_LINEAR(DCDC_GPU, "dcdc-gpu", SC2730_POWER_PD_SW,
+			   SC2730_DCDC_GPU_PD_MASK, SC2730_DCDC_GPU_VOL,
+			   SC2730_DCDC_GPU_VOL_MASK, 3125, 0, 1596875),
+	SC2730_REGU_LINEAR(DCDC_CORE, "dcdc-core", SC2730_POWER_PD_SW,
+			   SC2730_DCDC_CORE_PD_MASK, SC2730_DCDC_CORE_VOL,
+			   SC2730_DCDC_CORE_VOL_MASK, 3125, 0, 1596875),
+	SC2730_REGU_LINEAR(DCDC_MODEM, "dcdc-modem", SC2730_POWER_PD_SW,
+			   SC2730_DCDC_MODEM_PD_MASK, SC2730_DCDC_MODEM_VOL,
+			   SC2730_DCDC_MODEM_VOL_MASK, 3125, 0, 1596875),
+	SC2730_REGU_LINEAR(DCDC_MEM, "dcdc-mem", SC2730_POWER_PD_SW,
+			   SC2730_DCDC_MEM_PD_MASK, SC2730_DCDC_MEM_VOL,
+			   SC2730_DCDC_MEM_VOL_MASK, 6250, 0, 1593750),
+	SC2730_REGU_LINEAR(DCDC_MEMQ, "dcdc-memq", SC2730_POWER_PD_SW,
+			   SC2730_DCDC_MEMQ_PD_MASK, SC2730_DCDC_MEMQ_VOL,
+			   SC2730_DCDC_MEMQ_VOL_MASK, 3125, 0, 1596875),
+	SC2730_REGU_LINEAR(DCDC_GEN0, "dcdc-gen0", SC2730_POWER_PD_SW,
+			   SC2730_DCDC_GEN0_PD_MASK, SC2730_DCDC_GEN0_VOL,
+			   SC2730_DCDC_GEN0_VOL_MASK, 9375, 20000, 2410625),
+	SC2730_REGU_LINEAR(DCDC_GEN1, "dcdc-gen1", SC2730_POWER_PD_SW,
+			   SC2730_DCDC_GEN1_PD_MASK, SC2730_DCDC_GEN1_VOL,
+			   SC2730_DCDC_GEN1_VOL_MASK, 6250, 50000, 1643750),
+	SC2730_REGU_LINEAR(DCDC_SRAM, "dcdc-sram", SC2730_POWER_PD_SW,
+			   SC2730_DCDC_SRAM_PD_MASK, SC2730_DCDC_SRAM_VOL,
+			   SC2730_DCDC_SRAM_VOL_MASK, 3125, 0, 1596875),
+	SC2730_REGU_LINEAR(LDO_AVDD18, "ldo-avdd18", SC2730_POWER_PD_SW,
+			   SC2730_LDO_AVDD18_PD_MASK, SC2730_LDO_AVDD18_VOL,
+			   SC2730_LDO_AVDD18_VOL_MASK, 10000, 1175000, 1805000),
+	SC2730_REGU_LINEAR(LDO_VDDRF18, "ldo-vddrf18", SC2730_LDO_VDDRF18_PD,
+			   SC2730_LDO_VDDRF18_PD_MASK, SC2730_LDO_VDDRF18_VOL,
+			   SC2730_LDO_VDDRF18_VOL_MASK, 10000, 1175000, 1805000),
+	SC2730_REGU_LINEAR(LDO_VDDCAMIO, "ldo-vddcamio", SC2730_LDO_VDDCAMIO_PD,
+			   SC2730_LDO_VDDCAMIO_PD_MASK, SC2730_LDO_VDDCAMIO_VOL,
+			   SC2730_LDO_VDDCAMIO_VOL_MASK, 10000, 1200000, 1830000),
+	SC2730_REGU_LINEAR(LDO_VDDWCN, "ldo-vddwcn", SC2730_LDO_VDDWCN_PD,
+			   SC2730_LDO_VDDWCN_PD_MASK, SC2730_LDO_VDDWCN_VOL,
+			   SC2730_LDO_VDDWCN_VOL_MASK, 15000, 900000, 1845000),
+	SC2730_REGU_LINEAR(LDO_VDDCAMD1, "ldo-vddcamd1", SC2730_LDO_VDDCAMD1_PD,
+			   SC2730_LDO_VDDCAMD1_PD_MASK, SC2730_LDO_VDDCAMD1_VOL,
+			   SC2730_LDO_VDDCAMD1_VOL_MASK, 15000, 900000, 1365000),
+	SC2730_REGU_LINEAR(LDO_VDDCAMD0, "ldo-vddcamd0", SC2730_LDO_VDDCAMD0_PD,
+			   SC2730_LDO_VDDCAMD0_PD_MASK, SC2730_LDO_VDDCAMD0_VOL,
+			   SC2730_LDO_VDDCAMD0_VOL_MASK, 15000, 900000, 1365000),
+	SC2730_REGU_LINEAR(LDO_VDDRF1V25, "ldo-vddrf1v25", SC2730_LDO_VDDRF1V25_PD,
+			   SC2730_LDO_VDDRF1V25_PD_MASK, SC2730_LDO_VDDRF1V25_VOL,
+			   SC2730_LDO_VDDRF1V25_VOL_MASK, 15000, 900000, 1365000),
+	SC2730_REGU_LINEAR(LDO_AVDD12, "ldo-avdd12", SC2730_LDO_AVDD12_PD,
+			   SC2730_LDO_AVDD12_PD_MASK, SC2730_LDO_AVDD12_VOL,
+			   SC2730_LDO_AVDD12_VOL_MASK, 15000, 900000, 1365000),
+	SC2730_REGU_LINEAR(LDO_VDDCAMA0, "ldo-vddcama0", SC2730_LDO_VDDCAMA0_PD,
+			   SC2730_LDO_VDDCAMA0_PD_MASK, SC2730_LDO_VDDCAMA0_VOL,
+			   SC2730_LDO_VDDCAMA0_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDDCAMA1, "ldo-vddcama1", SC2730_LDO_VDDCAMA1_PD,
+			   SC2730_LDO_VDDCAMA1_PD_MASK, SC2730_LDO_VDDCAMA1_VOL,
+			   SC2730_LDO_VDDCAMA1_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDDCAMMOT, "ldo-vddcammot", SC2730_LDO_VDDCAMMOT_PD,
+			   SC2730_LDO_VDDCAMMOT_PD_MASK, SC2730_LDO_VDDCAMMOT_VOL,
+			   SC2730_LDO_VDDCAMMOT_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDDSIM2, "ldo-vddsim2", SC2730_LDO_VDDSIM2_PD,
+			   SC2730_LDO_VDDSIM2_PD_MASK, SC2730_LDO_VDDSIM2_VOL,
+			   SC2730_LDO_VDDSIM2_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDDEMMCCORE, "ldo-vddemmccore", SC2730_LDO_VDDEMMCCORE_PD,
+			   SC2730_LDO_VDDEMMCCORE_PD_MASK, SC2730_LDO_VDDEMMCCORE_VOL,
+			   SC2730_LDO_VDDEMMCCORE_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDDSDCORE, "ldo-vddsdcore", SC2730_LDO_VDDSDCORE_PD,
+			   SC2730_LDO_VDDSDCORE_PD_MASK, SC2730_LDO_VDDSDCORE_VOL,
+			   SC2730_LDO_VDDSDCORE_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDDSDIO, "ldo-vddsdio", SC2730_LDO_VDDSDIO_PD,
+			   SC2730_LDO_VDDSDIO_PD_MASK, SC2730_LDO_VDDSDIO_VOL,
+			   SC2730_LDO_VDDSDIO_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDD28, "ldo-vdd28", SC2730_POWER_PD_SW,
+			   SC2730_LDO_VDD28_PD_MASK, SC2730_LDO_VDD28_VOL,
+			   SC2730_LDO_VDD28_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDDWIFIPA, "ldo-vddwifipa", SC2730_LDO_VDDWIFIPA_PD,
+			   SC2730_LDO_VDDWIFIPA_PD_MASK, SC2730_LDO_VDDWIFIPA_VOL,
+			   SC2730_LDO_VDDWIFIPA_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDD18_DCXO, "ldo-vdd18-dcxo", SC2730_POWER_PD_SW,
+			   SC2730_LDO_VDD18_DCXO_PD_MASK, SC2730_LDO_VDD18_DCXO_VOL,
+			   SC2730_LDO_VDD18_DCXO_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDDUSB33, "ldo-vddusb33", SC2730_LDO_VDDUSB33_PD,
+			   SC2730_LDO_VDDUSB33_PD_MASK, SC2730_LDO_VDDUSB33_VOL,
+			   SC2730_LDO_VDDUSB33_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDDLDO0, "ldo-vddldo0", SC2730_LDO_VDDLDO0_PD,
+			   SC2730_LDO_VDDLDO0_PD_MASK, SC2730_LDO_VDDLDO0_VOL,
+			   SC2730_LDO_VDDLDO0_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDDLDO1, "ldo-vddldo1", SC2730_LDO_VDDLDO1_PD,
+			   SC2730_LDO_VDDLDO1_PD_MASK, SC2730_LDO_VDDLDO1_VOL,
+			   SC2730_LDO_VDDLDO1_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDDLDO2, "ldo-vddldo2", SC2730_LDO_VDDLDO2_PD,
+			   SC2730_LDO_VDDLDO2_PD_MASK, SC2730_LDO_VDDLDO2_VOL,
+			   SC2730_LDO_VDDLDO2_VOL_MASK, 10000, 1200000, 3750000),
+	SC2730_REGU_LINEAR(LDO_VDDKPLED, "ldo-vddkpled", SC2730_LDO_VDDKPLED_PD,
+			   SC2730_LDO_VDDKPLED_PD_MASK, SC2730_LDO_VDDKPLED_VOL,
+			   SC2730_LDO_VDDKPLED_VOL_MASK, 10000, 1200000, 3750000),
+};
+
+static int sc2730_regulator_unlock(struct regmap *regmap)
+{
+	return regmap_write(regmap, SC2730_PWR_WR_PROT, SC2730_WR_UNLOCK_VALUE);
+}
+
+static int sc2730_regulator_probe(struct platform_device *pdev)
+{
+	int i, ret;
+	struct regmap *regmap;
+	struct regulator_config config = { };
+	struct regulator_dev *rdev;
+
+	regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!regmap)
+		return dev_err_probe(&pdev->dev, -ENODEV, "failed to get regmap\n");
+
+	ret = sc2730_regulator_unlock(regmap);
+	if (ret)
+		return dev_err_probe(&pdev->dev, ret, "failed to release regulator lock\n");
+
+	config.dev = pdev->dev.parent;
+	config.regmap = regmap;
+
+	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
+		rdev = devm_regulator_register(&pdev->dev, &regulators[i], &config);
+		if (IS_ERR(rdev)) {
+			return dev_err_probe(&pdev->dev, PTR_ERR(rdev),
+					     "failed to register regulator %s\n",
+					     regulators[i].name);
+		}
+	}
+
+	return 0;
+}
+
+static const struct platform_device_id sc2730_regulator_id_table[] = {
+	{ .name = "sc2730-regulator" },
+	{ }
+};
+MODULE_DEVICE_TABLE(platform, sc2730_regulator_id_table);
+
+static struct platform_driver sc2730_regulator_driver = {
+	.driver = {
+		.name = "sc2730-regulator",
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
+	},
+	.probe = sc2730_regulator_probe,
+	.id_table = sc2730_regulator_id_table,
+};
+
+module_platform_driver(sc2730_regulator_driver);
+
+MODULE_AUTHOR("Zhongfa Wang <zhongfa.wang@unisoc.com>");
+MODULE_DESCRIPTION("Spreadtrum SC2730 regulator driver");
+MODULE_LICENSE("GPL");