Message-Id: <20181008185500.AE4CF440078@finisterre.ee.mobilebroadband>
Date:   Mon,  8 Oct 2018 19:55:00 +0100 (BST)
From:   Mark Brown <broonie@...nel.org>
To:     pascal paillet <p.paillet@...com>
Cc:     Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org
Subject: Applied "regulator: stpmic1: add stpmic1 regulator driver" to the regulator tree

The patch

   regulator: stpmic1: add stpmic1 regulator driver

has been applied to the regulator tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From ca55b7185b74e73d2b39dc40efaf96100a2582cd Mon Sep 17 00:00:00 2001
From: pascal paillet <p.paillet@...com>
Date: Mon, 8 Oct 2018 16:29:40 +0000
Subject: [PATCH] regulator: stpmic1: add stpmic1 regulator driver

The stpmic1 PMIC embeds several regulators and switches with
different capabilities.

Signed-off-by: pascal paillet <p.paillet@...com>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 drivers/regulator/Kconfig             |  12 +
 drivers/regulator/Makefile            |   1 +
 drivers/regulator/stpmic1_regulator.c | 674 ++++++++++++++++++++++++++
 3 files changed, 687 insertions(+)
 create mode 100644 drivers/regulator/stpmic1_regulator.c

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 6e96ef1bd74a..026d480a7ac5 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -803,6 +803,18 @@ config REGULATOR_STM32_VREFBUF
 	  This driver can also be built as a module. If so, the module
 	  will be called stm32-vrefbuf.
 
+config REGULATOR_STPMIC1
+	tristate "STMicroelectronics STPMIC1 PMIC Regulators"
+	depends on MFD_STPMIC1
+	help
+	  This driver supports STMicroelectronics STPMIC1 PMIC voltage
+	  regulators and switches. The STPMIC1 regulators supply power to
+	  an application processor as well as to external system
+	  peripherals such as DDR, Flash memories and system devices.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called stpmic1_regulator.
+
 config REGULATOR_TI_ABB
 	tristate "TI Adaptive Body Bias on-chip LDO"
 	depends on ARCH_OMAP
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index eac4d794f3b8..300bc4ce01d6 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -101,6 +101,7 @@ obj-$(CONFIG_REGULATOR_S5M8767) += s5m8767.o
 obj-$(CONFIG_REGULATOR_SC2731) += sc2731-regulator.o
 obj-$(CONFIG_REGULATOR_SKY81452) += sky81452-regulator.o
 obj-$(CONFIG_REGULATOR_STM32_VREFBUF) += stm32-vrefbuf.o
+obj-$(CONFIG_REGULATOR_STPMIC1) += stpmic1_regulator.o
 obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o
 obj-$(CONFIG_REGULATOR_SY8106A) += sy8106a-regulator.o
 obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o
diff --git a/drivers/regulator/stpmic1_regulator.c b/drivers/regulator/stpmic1_regulator.c
new file mode 100644
index 000000000000..96f18083a3b6
--- /dev/null
+++ b/drivers/regulator/stpmic1_regulator.c
@@ -0,0 +1,674 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) STMicroelectronics 2018
+// Author: Pascal Paillet <p.paillet@...com> for STMicroelectronics.
+
+#include <linux/interrupt.h>
+#include <linux/mfd/stpmic1.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+
+/**
+ * stpmic1 regulator description
+ * @desc: regulator framework description
+ * @mask_reset_reg: mask reset register address
+ * @mask_reset_mask: mask rank and mask reset register mask
+ * @icc_reg: icc register address
+ * @icc_mask: icc register mask
+ */
+struct stpmic1_regulator_cfg {
+	struct regulator_desc desc;
+	u8 mask_reset_reg;
+	u8 mask_reset_mask;
+	u8 icc_reg;
+	u8 icc_mask;
+};
+
+/**
+ * stpmic1 regulator data: this structure is used as driver data
+ * @regul_id: regulator id
+ * @reg_node: DT node of regulator (unused on non-DT platforms)
+ * @cfg: stpmic specific regulator description
+ * @mask_reset: mask_reset bit value
+ * @irq_curlim: current limit interrupt number
+ * @regmap: point to parent regmap structure
+ */
+struct stpmic1_regulator {
+	unsigned int regul_id;
+	struct device_node *reg_node;
+	struct stpmic1_regulator_cfg *cfg;
+	u8 mask_reset;
+	int irq_curlim;
+	struct regmap *regmap;
+};
+
+static int stpmic1_set_mode(struct regulator_dev *rdev, unsigned int mode);
+static unsigned int stpmic1_get_mode(struct regulator_dev *rdev);
+static int stpmic1_set_icc(struct regulator_dev *rdev);
+static int stpmic1_regulator_parse_dt(void *driver_data);
+static unsigned int stpmic1_map_mode(unsigned int mode);
+
+enum {
+	STPMIC1_BUCK1 = 0,
+	STPMIC1_BUCK2 = 1,
+	STPMIC1_BUCK3 = 2,
+	STPMIC1_BUCK4 = 3,
+	STPMIC1_LDO1 = 4,
+	STPMIC1_LDO2 = 5,
+	STPMIC1_LDO3 = 6,
+	STPMIC1_LDO4 = 7,
+	STPMIC1_LDO5 = 8,
+	STPMIC1_LDO6 = 9,
+	STPMIC1_VREF_DDR = 10,
+	STPMIC1_BOOST = 11,
+	STPMIC1_VBUS_OTG = 12,
+	STPMIC1_SW_OUT = 13,
+};
+
+/* Enable time worst case is 5000mV/(2250uV/uS) */
+#define PMIC_ENABLE_TIME_US 2200
+
+#define STPMIC1_BUCK_MODE_NORMAL 0
+#define STPMIC1_BUCK_MODE_LP BUCK_HPLP_ENABLE_MASK
+
+struct regulator_linear_range buck1_ranges[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0, 30, 25000),
+	REGULATOR_LINEAR_RANGE(1350000, 31, 63, 0),
+};
+
+struct regulator_linear_range buck2_ranges[] = {
+	REGULATOR_LINEAR_RANGE(1000000, 0, 17, 0),
+	REGULATOR_LINEAR_RANGE(1050000, 18, 19, 0),
+	REGULATOR_LINEAR_RANGE(1100000, 20, 21, 0),
+	REGULATOR_LINEAR_RANGE(1150000, 22, 23, 0),
+	REGULATOR_LINEAR_RANGE(1200000, 24, 25, 0),
+	REGULATOR_LINEAR_RANGE(1250000, 26, 27, 0),
+	REGULATOR_LINEAR_RANGE(1300000, 28, 29, 0),
+	REGULATOR_LINEAR_RANGE(1350000, 30, 31, 0),
+	REGULATOR_LINEAR_RANGE(1400000, 32, 33, 0),
+	REGULATOR_LINEAR_RANGE(1450000, 34, 35, 0),
+	REGULATOR_LINEAR_RANGE(1500000, 36, 63, 0),
+};
+
+struct regulator_linear_range buck3_ranges[] = {
+	REGULATOR_LINEAR_RANGE(1000000, 0, 19, 0),
+	REGULATOR_LINEAR_RANGE(1100000, 20, 23, 0),
+	REGULATOR_LINEAR_RANGE(1200000, 24, 27, 0),
+	REGULATOR_LINEAR_RANGE(1300000, 28, 31, 0),
+	REGULATOR_LINEAR_RANGE(1400000, 32, 35, 0),
+	REGULATOR_LINEAR_RANGE(1500000, 36, 55, 100000),
+	REGULATOR_LINEAR_RANGE(3400000, 56, 63, 0),
+
+};
+
+struct regulator_linear_range buck4_ranges[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0, 27, 25000),
+	REGULATOR_LINEAR_RANGE(1300000, 28, 29, 0),
+	REGULATOR_LINEAR_RANGE(1350000, 30, 31, 0),
+	REGULATOR_LINEAR_RANGE(1400000, 32, 33, 0),
+	REGULATOR_LINEAR_RANGE(1450000, 34, 35, 0),
+	REGULATOR_LINEAR_RANGE(1500000, 36, 60, 100000),
+	REGULATOR_LINEAR_RANGE(3900000, 61, 63, 0),
+
+};
+
+struct regulator_linear_range ldo1_ranges[] = {
+	REGULATOR_LINEAR_RANGE(1700000, 0, 7, 0),
+	REGULATOR_LINEAR_RANGE(1700000, 8, 24, 100000),
+	REGULATOR_LINEAR_RANGE(3300000, 25, 31, 0),
+
+};
+
+struct regulator_linear_range ldo2_ranges[] = {
+	REGULATOR_LINEAR_RANGE(1700000, 0, 7, 0),
+	REGULATOR_LINEAR_RANGE(1700000, 8, 24, 100000),
+	REGULATOR_LINEAR_RANGE(3300000, 25, 30, 0),
+
+};
+
+struct regulator_linear_range ldo3_ranges[] = {
+	REGULATOR_LINEAR_RANGE(1700000, 0, 7, 0),
+	REGULATOR_LINEAR_RANGE(1700000, 8, 24, 100000),
+	REGULATOR_LINEAR_RANGE(3300000, 25, 30, 0),
+	/* with index 31 LDO3 is in DDR mode */
+	REGULATOR_LINEAR_RANGE(500000, 31, 31, 0),
+};
+
+struct regulator_linear_range ldo5_ranges[] = {
+	REGULATOR_LINEAR_RANGE(1700000, 0, 7, 0),
+	REGULATOR_LINEAR_RANGE(1700000, 8, 30, 100000),
+	REGULATOR_LINEAR_RANGE(3900000, 31, 31, 0),
+};
+
+struct regulator_linear_range ldo6_ranges[] = {
+	REGULATOR_LINEAR_RANGE(900000, 0, 24, 100000),
+	REGULATOR_LINEAR_RANGE(3300000, 25, 31, 0),
+};
+
+static struct regulator_ops stpmic1_ldo_ops = {
+	.list_voltage = regulator_list_voltage_linear_range,
+	.map_voltage = regulator_map_voltage_linear_range,
+	.is_enabled = regulator_is_enabled_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.set_pull_down = regulator_set_pull_down_regmap,
+	.set_over_current_protection = stpmic1_set_icc,
+};
+
+static struct regulator_ops stpmic1_ldo3_ops = {
+	.list_voltage = regulator_list_voltage_linear_range,
+	.map_voltage = regulator_map_voltage_iterate,
+	.is_enabled = regulator_is_enabled_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.set_pull_down = regulator_set_pull_down_regmap,
+	.get_bypass = regulator_get_bypass_regmap,
+	.set_bypass = regulator_set_bypass_regmap,
+	.set_over_current_protection = stpmic1_set_icc,
+};
+
+static struct regulator_ops stpmic1_ldo4_fixed_regul_ops = {
+	.is_enabled = regulator_is_enabled_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.set_pull_down = regulator_set_pull_down_regmap,
+	.set_over_current_protection = stpmic1_set_icc,
+};
+
+static struct regulator_ops stpmic1_buck_ops = {
+	.list_voltage = regulator_list_voltage_linear_range,
+	.map_voltage = regulator_map_voltage_linear_range,
+	.is_enabled = regulator_is_enabled_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.set_pull_down = regulator_set_pull_down_regmap,
+	.set_mode = stpmic1_set_mode,
+	.get_mode = stpmic1_get_mode,
+	.set_over_current_protection = stpmic1_set_icc,
+};
+
+static struct regulator_ops stpmic1_vref_ddr_ops = {
+	.is_enabled = regulator_is_enabled_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.set_pull_down = regulator_set_pull_down_regmap,
+};
+
+static struct regulator_ops stpmic1_switch_regul_ops = {
+	.is_enabled = regulator_is_enabled_regmap,
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.set_over_current_protection = stpmic1_set_icc,
+};
+
+#define REG_LDO(ids, base) { \
+	.name = #ids, \
+	.id = STPMIC1_##ids, \
+	.n_voltages = 32, \
+	.ops = &stpmic1_ldo_ops, \
+	.linear_ranges = base ## _ranges, \
+	.n_linear_ranges = ARRAY_SIZE(base ## _ranges), \
+	.type = REGULATOR_VOLTAGE, \
+	.owner = THIS_MODULE, \
+	.vsel_reg = ids##_ACTIVE_CR, \
+	.vsel_mask = LDO_VOLTAGE_MASK, \
+	.enable_reg = ids##_ACTIVE_CR, \
+	.enable_mask = LDO_ENABLE_MASK, \
+	.enable_val = 1, \
+	.disable_val = 0, \
+	.enable_time = PMIC_ENABLE_TIME_US, \
+	.pull_down_reg = ids##_PULL_DOWN_REG, \
+	.pull_down_mask = ids##_PULL_DOWN_MASK, \
+	.supply_name = #base, \
+}
+
+#define REG_LDO3(ids, base) { \
+	.name = #ids, \
+	.id = STPMIC1_##ids, \
+	.n_voltages = 32, \
+	.ops = &stpmic1_ldo3_ops, \
+	.linear_ranges = ldo3_ranges, \
+	.n_linear_ranges = ARRAY_SIZE(ldo3_ranges), \
+	.type = REGULATOR_VOLTAGE, \
+	.owner = THIS_MODULE, \
+	.vsel_reg = LDO3_ACTIVE_CR, \
+	.vsel_mask = LDO_VOLTAGE_MASK, \
+	.enable_reg = LDO3_ACTIVE_CR, \
+	.enable_mask = LDO_ENABLE_MASK, \
+	.enable_val = 1, \
+	.disable_val = 0, \
+	.enable_time = PMIC_ENABLE_TIME_US, \
+	.bypass_reg = LDO3_ACTIVE_CR, \
+	.bypass_mask = LDO_BYPASS_MASK, \
+	.bypass_val_on = LDO_BYPASS_MASK, \
+	.bypass_val_off = 0, \
+	.pull_down_reg = ids##_PULL_DOWN_REG, \
+	.pull_down_mask = ids##_PULL_DOWN_MASK, \
+	.supply_name = #base, \
+}
+
+#define REG_LDO4(ids, base) { \
+	.name = #ids, \
+	.id = STPMIC1_##ids, \
+	.n_voltages = 1, \
+	.ops = &stpmic1_ldo4_fixed_regul_ops, \
+	.type = REGULATOR_VOLTAGE, \
+	.owner = THIS_MODULE, \
+	.min_uV = 3300000, \
+	.fixed_uV = 3300000, \
+	.enable_reg = LDO4_ACTIVE_CR, \
+	.enable_mask = LDO_ENABLE_MASK, \
+	.enable_val = 1, \
+	.disable_val = 0, \
+	.enable_time = PMIC_ENABLE_TIME_US, \
+	.pull_down_reg = ids##_PULL_DOWN_REG, \
+	.pull_down_mask = ids##_PULL_DOWN_MASK, \
+	.supply_name = #base, \
+}
+
+#define REG_BUCK(ids, base) { \
+	.name = #ids, \
+	.id = STPMIC1_##ids, \
+	.ops = &stpmic1_buck_ops, \
+	.n_voltages = 64, \
+	.linear_ranges = base ## _ranges, \
+	.n_linear_ranges = ARRAY_SIZE(base ## _ranges), \
+	.type = REGULATOR_VOLTAGE, \
+	.owner = THIS_MODULE, \
+	.vsel_reg = ids##_ACTIVE_CR, \
+	.vsel_mask = BUCK_VOLTAGE_MASK, \
+	.enable_reg = ids##_ACTIVE_CR, \
+	.enable_mask = BUCK_ENABLE_MASK, \
+	.enable_val = 1, \
+	.disable_val = 0, \
+	.enable_time = PMIC_ENABLE_TIME_US, \
+	.of_map_mode = stpmic1_map_mode, \
+	.pull_down_reg = ids##_PULL_DOWN_REG, \
+	.pull_down_mask = ids##_PULL_DOWN_MASK, \
+	.supply_name = #base, \
+}
+
+#define REG_VREF_DDR(ids, base) { \
+	.name = #ids, \
+	.id = STPMIC1_##ids, \
+	.n_voltages = 1, \
+	.ops = &stpmic1_vref_ddr_ops, \
+	.type = REGULATOR_VOLTAGE, \
+	.owner = THIS_MODULE, \
+	.min_uV = 500000, \
+	.fixed_uV = 500000, \
+	.enable_reg = VREF_DDR_ACTIVE_CR, \
+	.enable_mask = BUCK_ENABLE_MASK, \
+	.enable_val = 1, \
+	.disable_val = 0, \
+	.enable_time = PMIC_ENABLE_TIME_US, \
+	.pull_down_reg = ids##_PULL_DOWN_REG, \
+	.pull_down_mask = ids##_PULL_DOWN_MASK, \
+	.supply_name = #base, \
+}
+
+#define REG_SWITCH(ids, base, reg, mask, val) { \
+	.name = #ids, \
+	.id = STPMIC1_##ids, \
+	.n_voltages = 1, \
+	.ops = &stpmic1_switch_regul_ops, \
+	.type = REGULATOR_VOLTAGE, \
+	.owner = THIS_MODULE, \
+	.min_uV = 0, \
+	.fixed_uV = 5000000, \
+	.enable_reg = (reg), \
+	.enable_mask = (mask), \
+	.enable_val = (val), \
+	.disable_val = 0, \
+	.enable_time = PMIC_ENABLE_TIME_US, \
+	.supply_name = #base, \
+}
+
+struct stpmic1_regulator_cfg stpmic1_regulator_cfgs[] = {
+	[STPMIC1_BUCK1] = {
+		.desc = REG_BUCK(BUCK1, buck1),
+		.icc_reg = BUCKS_ICCTO_CR,
+		.icc_mask = BIT(0),
+		.mask_reset_reg = BUCKS_MASK_RESET_CR,
+		.mask_reset_mask = BIT(0),
+	},
+	[STPMIC1_BUCK2] = {
+		.desc = REG_BUCK(BUCK2, buck2),
+		.icc_reg = BUCKS_ICCTO_CR,
+		.icc_mask = BIT(1),
+		.mask_reset_reg = BUCKS_MASK_RESET_CR,
+		.mask_reset_mask = BIT(1),
+	},
+	[STPMIC1_BUCK3] = {
+		.desc = REG_BUCK(BUCK3, buck3),
+		.icc_reg = BUCKS_ICCTO_CR,
+		.icc_mask = BIT(2),
+		.mask_reset_reg = BUCKS_MASK_RESET_CR,
+		.mask_reset_mask = BIT(2),
+	},
+	[STPMIC1_BUCK4] = {
+		.desc = REG_BUCK(BUCK4, buck4),
+		.icc_reg = BUCKS_ICCTO_CR,
+		.icc_mask = BIT(3),
+		.mask_reset_reg = BUCKS_MASK_RESET_CR,
+		.mask_reset_mask = BIT(3),
+	},
+	[STPMIC1_LDO1] = {
+		.desc = REG_LDO(LDO1, ldo1),
+		.icc_reg = LDOS_ICCTO_CR,
+		.icc_mask = BIT(0),
+		.mask_reset_reg = LDOS_MASK_RESET_CR,
+		.mask_reset_mask = BIT(0),
+	},
+	[STPMIC1_LDO2] = {
+		.desc = REG_LDO(LDO2, ldo2),
+		.icc_reg = LDOS_ICCTO_CR,
+		.icc_mask = BIT(1),
+		.mask_reset_reg = LDOS_MASK_RESET_CR,
+		.mask_reset_mask = BIT(1),
+	},
+	[STPMIC1_LDO3] = {
+		.desc = REG_LDO3(LDO3, ldo3),
+		.icc_reg = LDOS_ICCTO_CR,
+		.icc_mask = BIT(2),
+		.mask_reset_reg = LDOS_MASK_RESET_CR,
+		.mask_reset_mask = BIT(2),
+	},
+	[STPMIC1_LDO4] = {
+		.desc = REG_LDO4(LDO4, ldo4),
+		.icc_reg = LDOS_ICCTO_CR,
+		.icc_mask = BIT(3),
+		.mask_reset_reg = LDOS_MASK_RESET_CR,
+		.mask_reset_mask = BIT(3),
+	},
+	[STPMIC1_LDO5] = {
+		.desc = REG_LDO(LDO5, ldo5),
+		.icc_reg = LDOS_ICCTO_CR,
+		.icc_mask = BIT(4),
+		.mask_reset_reg = LDOS_MASK_RESET_CR,
+		.mask_reset_mask = BIT(4),
+	},
+	[STPMIC1_LDO6] = {
+		.desc = REG_LDO(LDO6, ldo6),
+		.icc_reg = LDOS_ICCTO_CR,
+		.icc_mask = BIT(5),
+		.mask_reset_reg = LDOS_MASK_RESET_CR,
+		.mask_reset_mask = BIT(5),
+	},
+	[STPMIC1_VREF_DDR] = {
+		.desc = REG_VREF_DDR(VREF_DDR, vref_ddr),
+		.mask_reset_reg = LDOS_MASK_RESET_CR,
+		.mask_reset_mask = BIT(6),
+	},
+	[STPMIC1_BOOST] = {
+		.desc = REG_SWITCH(BOOST, boost, BST_SW_CR,
+				   BOOST_ENABLED,
+				   BOOST_ENABLED),
+		.icc_reg = BUCKS_ICCTO_CR,
+		.icc_mask = BIT(6),
+	},
+	[STPMIC1_VBUS_OTG] = {
+		.desc = REG_SWITCH(VBUS_OTG, pwr_sw1, BST_SW_CR,
+				   USBSW_OTG_SWITCH_ENABLED,
+				   USBSW_OTG_SWITCH_ENABLED),
+		.icc_reg = BUCKS_ICCTO_CR,
+		.icc_mask = BIT(4),
+	},
+	[STPMIC1_SW_OUT] = {
+		.desc = REG_SWITCH(SW_OUT, pwr_sw2, BST_SW_CR,
+				   SWIN_SWOUT_ENABLED,
+				   SWIN_SWOUT_ENABLED),
+		.icc_reg = BUCKS_ICCTO_CR,
+		.icc_mask = BIT(5),
+	},
+};
+
+static unsigned int stpmic1_map_mode(unsigned int mode)
+{
+	switch (mode) {
+	case STPMIC1_BUCK_MODE_NORMAL:
+		return REGULATOR_MODE_NORMAL;
+	case STPMIC1_BUCK_MODE_LP:
+		return REGULATOR_MODE_STANDBY;
+	default:
+		return -EINVAL;
+	}
+}
+
+static unsigned int stpmic1_get_mode(struct regulator_dev *rdev)
+{
+	int value;
+
+	regmap_read(rdev->regmap, rdev->desc->enable_reg, &value);
+
+	if (value & STPMIC1_BUCK_MODE_LP)
+		return REGULATOR_MODE_STANDBY;
+
+	return REGULATOR_MODE_NORMAL;
+}
+
+static int stpmic1_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+	int value;
+
+	switch (mode) {
+	case REGULATOR_MODE_NORMAL:
+		value = STPMIC1_BUCK_MODE_NORMAL;
+		break;
+	case REGULATOR_MODE_STANDBY:
+		value = STPMIC1_BUCK_MODE_LP;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+				  STPMIC1_BUCK_MODE_LP, value);
+}
+
+static int stpmic1_set_icc(struct regulator_dev *rdev)
+{
+	struct stpmic1_regulator *regul = rdev_get_drvdata(rdev);
+
+	/* enable switch off in case of over current */
+	return regmap_update_bits(regul->regmap, regul->cfg->icc_reg,
+				  regul->cfg->icc_mask, regul->cfg->icc_mask);
+}
+
+static irqreturn_t stpmic1_curlim_irq_handler(int irq, void *data)
+{
+	struct regulator_dev *rdev = (struct regulator_dev *)data;
+
+	mutex_lock(&rdev->mutex);
+
+	/* Send an overcurrent notification */
+	regulator_notifier_call_chain(rdev,
+				      REGULATOR_EVENT_OVER_CURRENT,
+				      NULL);
+
+	mutex_unlock(&rdev->mutex);
+
+	return IRQ_HANDLED;
+}
+
+static int stpmic1_regulator_init(struct platform_device *pdev,
+				  struct regulator_dev *rdev)
+{
+	struct stpmic1_regulator *regul = rdev_get_drvdata(rdev);
+	int ret = 0;
+
+	/* set mask reset */
+	if (regul->mask_reset && regul->cfg->mask_reset_reg != 0) {
+		ret = regmap_update_bits(regul->regmap,
+					 regul->cfg->mask_reset_reg,
+					 regul->cfg->mask_reset_mask,
+					 regul->cfg->mask_reset_mask);
+		if (ret) {
+			dev_err(&pdev->dev, "set mask reset failed\n");
+			return ret;
+		}
+	}
+
+	/* setup an irq handler for over-current detection */
+	if (regul->irq_curlim > 0) {
+		ret = devm_request_threaded_irq(&pdev->dev,
+						regul->irq_curlim, NULL,
+						stpmic1_curlim_irq_handler,
+						IRQF_ONESHOT | IRQF_SHARED,
+						pdev->name, rdev);
+		if (ret) {
+			dev_err(&pdev->dev, "Request IRQ failed\n");
+			return ret;
+		}
+	}
+	return 0;
+}
+
+#define MATCH(_name, _id) \
+	[STPMIC1_##_id] = { \
+		.name = #_name, \
+		.desc = &stpmic1_regulator_cfgs[STPMIC1_##_id].desc, \
+	}
+
+static struct of_regulator_match stpmic1_regulators_matches[] = {
+	MATCH(buck1, BUCK1),
+	MATCH(buck2, BUCK2),
+	MATCH(buck3, BUCK3),
+	MATCH(buck4, BUCK4),
+	MATCH(ldo1, LDO1),
+	MATCH(ldo2, LDO2),
+	MATCH(ldo3, LDO3),
+	MATCH(ldo4, LDO4),
+	MATCH(ldo5, LDO5),
+	MATCH(ldo6, LDO6),
+	MATCH(vref_ddr, VREF_DDR),
+	MATCH(boost, BOOST),
+	MATCH(pwr_sw1, VBUS_OTG),
+	MATCH(pwr_sw2, SW_OUT),
+};
+
+static int stpmic1_regulator_parse_dt(void *driver_data)
+{
+	struct stpmic1_regulator *regul =
+		(struct stpmic1_regulator *)driver_data;
+
+	if (!regul)
+		return -EINVAL;
+
+	if (of_get_property(regul->reg_node, "st,mask-reset", NULL))
+		regul->mask_reset = 1;
+
+	regul->irq_curlim = of_irq_get(regul->reg_node, 0);
+
+	return 0;
+}
+
+static struct
+regulator_dev *stpmic1_regulator_register(struct platform_device *pdev, int id,
+					  struct regulator_init_data *init_data,
+					  struct stpmic1_regulator *regul)
+{
+	struct stpmic1 *pmic_dev = dev_get_drvdata(pdev->dev.parent);
+	struct regulator_dev *rdev;
+	struct regulator_config config = {};
+
+	config.dev = &pdev->dev;
+	config.init_data = init_data;
+	config.of_node = stpmic1_regulators_matches[id].of_node;
+	config.regmap = pmic_dev->regmap;
+	config.driver_data = regul;
+
+	regul->regul_id = id;
+	regul->reg_node = config.of_node;
+	regul->cfg = &stpmic1_regulator_cfgs[id];
+	regul->regmap = pmic_dev->regmap;
+
+	rdev = devm_regulator_register(&pdev->dev, &regul->cfg->desc, &config);
+	if (IS_ERR(rdev)) {
+		dev_err(&pdev->dev, "failed to register %s regulator\n",
+			regul->cfg->desc.name);
+	}
+
+	return rdev;
+}
+
+static int stpmic1_regulator_probe(struct platform_device *pdev)
+{
+	struct regulator_dev *rdev;
+	struct stpmic1_regulator *regul;
+	struct regulator_init_data *init_data;
+	struct device_node *np;
+	int i, ret;
+
+	np = pdev->dev.of_node;
+
+	ret = of_regulator_match(&pdev->dev, np,
+				 stpmic1_regulators_matches,
+				 ARRAY_SIZE(stpmic1_regulators_matches));
+	if (ret < 0) {
+		dev_err(&pdev->dev,
+			"Error in PMIC regulator device tree node");
+		return ret;
+	}
+
+	regul = devm_kzalloc(&pdev->dev, ARRAY_SIZE(stpmic1_regulator_cfgs) *
+			     sizeof(struct stpmic1_regulator),
+			     GFP_KERNEL);
+	if (!regul)
+		return -ENOMEM;
+
+	for (i = 0; i < ARRAY_SIZE(stpmic1_regulator_cfgs); i++) {
+		/* Parse DT & find regulators to register */
+		init_data = stpmic1_regulators_matches[i].init_data;
+		if (init_data)
+			init_data->regulator_init = &stpmic1_regulator_parse_dt;
+
+		rdev = stpmic1_regulator_register(pdev, i, init_data, regul);
+		if (IS_ERR(rdev))
+			return PTR_ERR(rdev);
+
+		ret = stpmic1_regulator_init(pdev, rdev);
+		if (ret) {
+			dev_err(&pdev->dev,
+				"failed to initialize regulator %d\n", ret);
+			return ret;
+		}
+
+		regul++;
+	}
+
+	dev_dbg(&pdev->dev, "stpmic1_regulator driver probed\n");
+
+	return 0;
+}
+
+static const struct of_device_id of_pmic_regulator_match[] = {
+	{ .compatible = "st,stpmic1-regulators" },
+	{ },
+};
+
+MODULE_DEVICE_TABLE(of, of_pmic_regulator_match);
+
+static struct platform_driver stpmic1_regulator_driver = {
+	.driver = {
+		.name = "stpmic1-regulator",
+		.of_match_table = of_match_ptr(of_pmic_regulator_match),
+	},
+	.probe = stpmic1_regulator_probe,
+};
+
+module_platform_driver(stpmic1_regulator_driver);
+
+MODULE_DESCRIPTION("STPMIC1 PMIC voltage regulator driver");
+MODULE_AUTHOR("Pascal Paillet <p.paillet@...com>");
+MODULE_LICENSE("GPL v2");
-- 
2.19.0

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