regulator: pca9450: add pca9450 pmic driver

Add NXP pca9450 pmic driver.

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Link: https://lore.kernel.org/r/1593793178-9737-2-git-send-email-yibin.gong@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

3 files changed, 852 insertions, 0 deletions

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 2c6a8c4bdf06..8f9bef574af2 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -750,6 +750,14 @@ config REGULATOR_PBIAS
 	 This driver provides support for OMAP pbias modelled
 	 regulators.
 
+config REGULATOR_PCA9450
+	tristate "NXP PCA9450A/PCA9450B/PCA9450C regulator driver"
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  Say y here to support the NXP PCA9450A/PCA9450B/PCA9450C PMIC
+	  regulator driver.
+
 config REGULATOR_PCAP
 	tristate "Motorola PCAP2 regulator driver"
 	depends on EZX_PCAP
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 85bc3ef0be1c..6adfe769a47c 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -96,6 +96,7 @@ obj-$(CONFIG_REGULATOR_QCOM_SMD_RPM) += qcom_smd-regulator.o
 obj-$(CONFIG_REGULATOR_QCOM_SPMI) += qcom_spmi-regulator.o
 obj-$(CONFIG_REGULATOR_QCOM_USB_VBUS) += qcom_usb_vbus-regulator.o
 obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o
+obj-$(CONFIG_REGULATOR_PCA9450) += pca9450-regulator.o
 obj-$(CONFIG_REGULATOR_PFUZE100) += pfuze100-regulator.o
 obj-$(CONFIG_REGULATOR_PV88060) += pv88060-regulator.o
 obj-$(CONFIG_REGULATOR_PV88080) += pv88080-regulator.o
diff --git a/drivers/regulator/pca9450-regulator.c b/drivers/regulator/pca9450-regulator.c
new file mode 100644
index 000000000000..02250459aa90
--- /dev/null
+++ b/drivers/regulator/pca9450-regulator.c
@@ -0,0 +1,843 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2020 NXP.
+ * NXP PCA9450 pmic driver
+ */
+
+#include <linux/err.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/regulator/pca9450.h>
+
+struct pc9450_dvs_config {
+	unsigned int run_reg; /* dvs0 */
+	unsigned int run_mask;
+	unsigned int standby_reg; /* dvs1 */
+	unsigned int standby_mask;
+};
+
+struct pca9450_regulator_desc {
+	struct regulator_desc desc;
+	const struct pc9450_dvs_config dvs;
+};
+
+struct pca9450 {
+	struct device *dev;
+	struct regmap *regmap;
+	enum pca9450_chip_type type;
+	unsigned int rcnt;
+	int irq;
+};
+
+static const struct regmap_range pca9450_status_range = {
+	.range_min = PCA9450_REG_INT1,
+	.range_max = PCA9450_REG_PWRON_STAT,
+};
+
+static const struct regmap_access_table pca9450_volatile_regs = {
+	.yes_ranges = &pca9450_status_range,
+	.n_yes_ranges = 1,
+};
+
+static const struct regmap_config pca9450_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.volatile_table = &pca9450_volatile_regs,
+	.max_register = PCA9450_MAX_REGISTER - 1,
+	.cache_type = REGCACHE_RBTREE,
+};
+
+/*
+ * BUCK1/2/3
+ * BUCK1RAM[1:0] BUCK1 DVS ramp rate setting
+ * 00: 25mV/1usec
+ * 01: 25mV/2usec
+ * 10: 25mV/4usec
+ * 11: 25mV/8usec
+ */
+static int pca9450_dvs_set_ramp_delay(struct regulator_dev *rdev,
+				      int ramp_delay)
+{
+	int id = rdev_get_id(rdev);
+	unsigned int ramp_value;
+
+	switch (ramp_delay) {
+	case 1 ... 3125:
+		ramp_value = BUCK1_RAMP_3P125MV;
+		break;
+	case 3126 ... 6250:
+		ramp_value = BUCK1_RAMP_6P25MV;
+		break;
+	case 6251 ... 12500:
+		ramp_value = BUCK1_RAMP_12P5MV;
+		break;
+	case 12501 ... 25000:
+		ramp_value = BUCK1_RAMP_25MV;
+		break;
+	default:
+		ramp_value = BUCK1_RAMP_25MV;
+	}
+
+	return regmap_update_bits(rdev->regmap, PCA9450_REG_BUCK1CTRL + id * 3,
+				  BUCK1_RAMP_MASK, ramp_value << 6);
+}
+
+static struct regulator_ops pca9450_dvs_buck_regulator_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_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,
+	.set_ramp_delay = pca9450_dvs_set_ramp_delay,
+};
+
+static struct regulator_ops pca9450_buck_regulator_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_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,
+};
+
+static struct regulator_ops pca9450_ldo_regulator_ops = {
+	.enable = regulator_enable_regmap,
+	.disable = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_voltage_linear_range,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+};
+
+/*
+ * BUCK1/2/3
+ * 0.60 to 2.1875V (12.5mV step)
+ */
+static const struct linear_range pca9450_dvs_buck_volts[] = {
+	REGULATOR_LINEAR_RANGE(600000,  0x00, 0x7F, 12500),
+};
+
+/*
+ * BUCK4/5/6
+ * 0.6V to 3.4V (25mV step)
+ */
+static const struct linear_range pca9450_buck_volts[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0x00, 0x70, 25000),
+	REGULATOR_LINEAR_RANGE(3400000, 0x71, 0x7F, 0),
+};
+
+/*
+ * LDO1
+ * 1.6 to 3.3V ()
+ */
+static const struct linear_range pca9450_ldo1_volts[] = {
+	REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000),
+	REGULATOR_LINEAR_RANGE(3000000, 0x04, 0x07, 100000),
+};
+
+/*
+ * LDO2
+ * 0.8 to 1.15V (50mV step)
+ */
+static const struct linear_range pca9450_ldo2_volts[] = {
+	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x07, 50000),
+};
+
+/*
+ * LDO3/4
+ * 0.8 to 3.3V (100mV step)
+ */
+static const struct linear_range pca9450_ldo34_volts[] = {
+	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x19, 100000),
+	REGULATOR_LINEAR_RANGE(3300000, 0x1A, 0x1F, 0),
+};
+
+/*
+ * LDO5
+ * 1.8 to 3.3V (100mV step)
+ */
+static const struct linear_range pca9450_ldo5_volts[] = {
+	REGULATOR_LINEAR_RANGE(1800000,  0x00, 0x0F, 100000),
+};
+
+static int buck_set_dvs(const struct regulator_desc *desc,
+			struct device_node *np, struct regmap *regmap,
+			char *prop, unsigned int reg, unsigned int mask)
+{
+	int ret, i;
+	uint32_t uv;
+
+	ret = of_property_read_u32(np, prop, &uv);
+	if (ret == -EINVAL)
+		return 0;
+	else if (ret)
+		return ret;
+
+	for (i = 0; i < desc->n_voltages; i++) {
+		ret = regulator_desc_list_voltage_linear_range(desc, i);
+		if (ret < 0)
+			continue;
+		if (ret == uv) {
+			i <<= ffs(desc->vsel_mask) - 1;
+			ret = regmap_update_bits(regmap, reg, mask, i);
+			break;
+		}
+	}
+
+	return ret;
+}
+
+static int pca9450_set_dvs_levels(struct device_node *np,
+			    const struct regulator_desc *desc,
+			    struct regulator_config *cfg)
+{
+	struct pca9450_regulator_desc *data = container_of(desc,
+					struct pca9450_regulator_desc, desc);
+	const struct pc9450_dvs_config *dvs = &data->dvs;
+	unsigned int reg, mask;
+	char *prop;
+	int i, ret = 0;
+
+	for (i = 0; i < PCA9450_DVS_LEVEL_MAX; i++) {
+		switch (i) {
+		case PCA9450_DVS_LEVEL_RUN:
+			prop = "nxp,dvs-run-voltage";
+			reg = dvs->run_reg;
+			mask = dvs->run_mask;
+			break;
+		case PCA9450_DVS_LEVEL_STANDBY:
+			prop = "nxp,dvs-standby-voltage";
+			reg = dvs->standby_reg;
+			mask = dvs->standby_mask;
+			break;
+		default:
+			return -EINVAL;
+		}
+
+		ret = buck_set_dvs(desc, np, cfg->regmap, prop, reg, mask);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+static const struct pca9450_regulator_desc pca9450a_regulators[] = {
+	{
+		.desc = {
+			.name = "buck1",
+			.of_match = of_match_ptr("BUCK1"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_BUCK1,
+			.ops = &pca9450_dvs_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
+			.linear_ranges = pca9450_dvs_buck_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
+			.vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
+			.vsel_mask = BUCK1OUT_DVS0_MASK,
+			.enable_reg = PCA9450_REG_BUCK1CTRL,
+			.enable_mask = BUCK1_ENMODE_MASK,
+			.owner = THIS_MODULE,
+			.of_parse_cb = pca9450_set_dvs_levels,
+		},
+		.dvs = {
+			.run_reg = PCA9450_REG_BUCK1OUT_DVS0,
+			.run_mask = BUCK1OUT_DVS0_MASK,
+			.standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
+			.standby_mask = BUCK1OUT_DVS1_MASK,
+		},
+	},
+	{
+		.desc = {
+			.name = "buck2",
+			.of_match = of_match_ptr("BUCK2"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_BUCK2,
+			.ops = &pca9450_dvs_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
+			.linear_ranges = pca9450_dvs_buck_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
+			.vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
+			.vsel_mask = BUCK2OUT_DVS0_MASK,
+			.enable_reg = PCA9450_REG_BUCK2CTRL,
+			.enable_mask = BUCK1_ENMODE_MASK,
+			.owner = THIS_MODULE,
+			.of_parse_cb = pca9450_set_dvs_levels,
+		},
+		.dvs = {
+			.run_reg = PCA9450_REG_BUCK2OUT_DVS0,
+			.run_mask = BUCK2OUT_DVS0_MASK,
+			.standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
+			.standby_mask = BUCK2OUT_DVS1_MASK,
+		},
+	},
+	{
+		.desc = {
+			.name = "buck3",
+			.of_match = of_match_ptr("BUCK3"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_BUCK3,
+			.ops = &pca9450_dvs_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_BUCK3_VOLTAGE_NUM,
+			.linear_ranges = pca9450_dvs_buck_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
+			.vsel_reg = PCA9450_REG_BUCK3OUT_DVS0,
+			.vsel_mask = BUCK3OUT_DVS0_MASK,
+			.enable_reg = PCA9450_REG_BUCK3CTRL,
+			.enable_mask = BUCK3_ENMODE_MASK,
+			.owner = THIS_MODULE,
+			.of_parse_cb = pca9450_set_dvs_levels,
+		},
+		.dvs = {
+			.run_reg = PCA9450_REG_BUCK3OUT_DVS0,
+			.run_mask = BUCK3OUT_DVS0_MASK,
+			.standby_reg = PCA9450_REG_BUCK3OUT_DVS1,
+			.standby_mask = BUCK3OUT_DVS1_MASK,
+		},
+	},
+	{
+		.desc = {
+			.name = "buck4",
+			.of_match = of_match_ptr("BUCK4"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_BUCK4,
+			.ops = &pca9450_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
+			.linear_ranges = pca9450_buck_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
+			.vsel_reg = PCA9450_REG_BUCK4OUT,
+			.vsel_mask = BUCK4OUT_MASK,
+			.enable_reg = PCA9450_REG_BUCK4CTRL,
+			.enable_mask = BUCK4_ENMODE_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "buck5",
+			.of_match = of_match_ptr("BUCK5"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_BUCK5,
+			.ops = &pca9450_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
+			.linear_ranges = pca9450_buck_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
+			.vsel_reg = PCA9450_REG_BUCK5OUT,
+			.vsel_mask = BUCK5OUT_MASK,
+			.enable_reg = PCA9450_REG_BUCK5CTRL,
+			.enable_mask = BUCK5_ENMODE_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "buck6",
+			.of_match = of_match_ptr("BUCK6"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_BUCK6,
+			.ops = &pca9450_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
+			.linear_ranges = pca9450_buck_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
+			.vsel_reg = PCA9450_REG_BUCK6OUT,
+			.vsel_mask = BUCK6OUT_MASK,
+			.enable_reg = PCA9450_REG_BUCK6CTRL,
+			.enable_mask = BUCK6_ENMODE_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldo1",
+			.of_match = of_match_ptr("LDO1"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_LDO1,
+			.ops = &pca9450_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
+			.linear_ranges = pca9450_ldo1_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
+			.vsel_reg = PCA9450_REG_LDO1CTRL,
+			.vsel_mask = LDO1OUT_MASK,
+			.enable_reg = PCA9450_REG_LDO1CTRL,
+			.enable_mask = LDO1_EN_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldo2",
+			.of_match = of_match_ptr("LDO2"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_LDO2,
+			.ops = &pca9450_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
+			.linear_ranges = pca9450_ldo2_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
+			.vsel_reg = PCA9450_REG_LDO2CTRL,
+			.vsel_mask = LDO2OUT_MASK,
+			.enable_reg = PCA9450_REG_LDO2CTRL,
+			.enable_mask = LDO2_EN_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldo3",
+			.of_match = of_match_ptr("LDO3"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_LDO3,
+			.ops = &pca9450_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
+			.linear_ranges = pca9450_ldo34_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
+			.vsel_reg = PCA9450_REG_LDO3CTRL,
+			.vsel_mask = LDO3OUT_MASK,
+			.enable_reg = PCA9450_REG_LDO3CTRL,
+			.enable_mask = LDO3_EN_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldo4",
+			.of_match = of_match_ptr("LDO4"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_LDO4,
+			.ops = &pca9450_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
+			.linear_ranges = pca9450_ldo34_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
+			.vsel_reg = PCA9450_REG_LDO4CTRL,
+			.vsel_mask = LDO4OUT_MASK,
+			.enable_reg = PCA9450_REG_LDO4CTRL,
+			.enable_mask = LDO4_EN_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldo5",
+			.of_match = of_match_ptr("LDO5"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_LDO5,
+			.ops = &pca9450_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
+			.linear_ranges = pca9450_ldo5_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
+			.vsel_reg = PCA9450_REG_LDO5CTRL_H,
+			.vsel_mask = LDO5HOUT_MASK,
+			.enable_reg = PCA9450_REG_LDO5CTRL_H,
+			.enable_mask = LDO5H_EN_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+};
+
+/*
+ * Buck3 removed on PCA9450B and connected with Buck1 internal for dual phase
+ * on PCA9450C as no Buck3.
+ */
+static const struct pca9450_regulator_desc pca9450bc_regulators[] = {
+	{
+		.desc = {
+			.name = "buck1",
+			.of_match = of_match_ptr("BUCK1"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_BUCK1,
+			.ops = &pca9450_dvs_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_BUCK1_VOLTAGE_NUM,
+			.linear_ranges = pca9450_dvs_buck_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
+			.vsel_reg = PCA9450_REG_BUCK1OUT_DVS0,
+			.vsel_mask = BUCK1OUT_DVS0_MASK,
+			.enable_reg = PCA9450_REG_BUCK1CTRL,
+			.enable_mask = BUCK1_ENMODE_MASK,
+			.owner = THIS_MODULE,
+			.of_parse_cb = pca9450_set_dvs_levels,
+		},
+		.dvs = {
+			.run_reg = PCA9450_REG_BUCK1OUT_DVS0,
+			.run_mask = BUCK1OUT_DVS0_MASK,
+			.standby_reg = PCA9450_REG_BUCK1OUT_DVS1,
+			.standby_mask = BUCK1OUT_DVS1_MASK,
+		},
+	},
+	{
+		.desc = {
+			.name = "buck2",
+			.of_match = of_match_ptr("BUCK2"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_BUCK2,
+			.ops = &pca9450_dvs_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_BUCK2_VOLTAGE_NUM,
+			.linear_ranges = pca9450_dvs_buck_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_dvs_buck_volts),
+			.vsel_reg = PCA9450_REG_BUCK2OUT_DVS0,
+			.vsel_mask = BUCK2OUT_DVS0_MASK,
+			.enable_reg = PCA9450_REG_BUCK2CTRL,
+			.enable_mask = BUCK1_ENMODE_MASK,
+			.owner = THIS_MODULE,
+			.of_parse_cb = pca9450_set_dvs_levels,
+		},
+		.dvs = {
+			.run_reg = PCA9450_REG_BUCK2OUT_DVS0,
+			.run_mask = BUCK2OUT_DVS0_MASK,
+			.standby_reg = PCA9450_REG_BUCK2OUT_DVS1,
+			.standby_mask = BUCK2OUT_DVS1_MASK,
+		},
+	},
+	{
+		.desc = {
+			.name = "buck4",
+			.of_match = of_match_ptr("BUCK4"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_BUCK4,
+			.ops = &pca9450_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_BUCK4_VOLTAGE_NUM,
+			.linear_ranges = pca9450_buck_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
+			.vsel_reg = PCA9450_REG_BUCK4OUT,
+			.vsel_mask = BUCK4OUT_MASK,
+			.enable_reg = PCA9450_REG_BUCK4CTRL,
+			.enable_mask = BUCK4_ENMODE_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "buck5",
+			.of_match = of_match_ptr("BUCK5"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_BUCK5,
+			.ops = &pca9450_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_BUCK5_VOLTAGE_NUM,
+			.linear_ranges = pca9450_buck_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
+			.vsel_reg = PCA9450_REG_BUCK5OUT,
+			.vsel_mask = BUCK5OUT_MASK,
+			.enable_reg = PCA9450_REG_BUCK5CTRL,
+			.enable_mask = BUCK5_ENMODE_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "buck6",
+			.of_match = of_match_ptr("BUCK6"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_BUCK6,
+			.ops = &pca9450_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_BUCK6_VOLTAGE_NUM,
+			.linear_ranges = pca9450_buck_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_buck_volts),
+			.vsel_reg = PCA9450_REG_BUCK6OUT,
+			.vsel_mask = BUCK6OUT_MASK,
+			.enable_reg = PCA9450_REG_BUCK6CTRL,
+			.enable_mask = BUCK6_ENMODE_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldo1",
+			.of_match = of_match_ptr("LDO1"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_LDO1,
+			.ops = &pca9450_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_LDO1_VOLTAGE_NUM,
+			.linear_ranges = pca9450_ldo1_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo1_volts),
+			.vsel_reg = PCA9450_REG_LDO1CTRL,
+			.vsel_mask = LDO1OUT_MASK,
+			.enable_reg = PCA9450_REG_LDO1CTRL,
+			.enable_mask = LDO1_EN_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldo2",
+			.of_match = of_match_ptr("LDO2"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_LDO2,
+			.ops = &pca9450_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_LDO2_VOLTAGE_NUM,
+			.linear_ranges = pca9450_ldo2_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo2_volts),
+			.vsel_reg = PCA9450_REG_LDO2CTRL,
+			.vsel_mask = LDO2OUT_MASK,
+			.enable_reg = PCA9450_REG_LDO2CTRL,
+			.enable_mask = LDO2_EN_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldo3",
+			.of_match = of_match_ptr("LDO3"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_LDO3,
+			.ops = &pca9450_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_LDO3_VOLTAGE_NUM,
+			.linear_ranges = pca9450_ldo34_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
+			.vsel_reg = PCA9450_REG_LDO3CTRL,
+			.vsel_mask = LDO3OUT_MASK,
+			.enable_reg = PCA9450_REG_LDO3CTRL,
+			.enable_mask = LDO3_EN_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldo4",
+			.of_match = of_match_ptr("LDO4"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_LDO4,
+			.ops = &pca9450_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_LDO4_VOLTAGE_NUM,
+			.linear_ranges = pca9450_ldo34_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo34_volts),
+			.vsel_reg = PCA9450_REG_LDO4CTRL,
+			.vsel_mask = LDO4OUT_MASK,
+			.enable_reg = PCA9450_REG_LDO4CTRL,
+			.enable_mask = LDO4_EN_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldo5",
+			.of_match = of_match_ptr("LDO5"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PCA9450_LDO5,
+			.ops = &pca9450_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PCA9450_LDO5_VOLTAGE_NUM,
+			.linear_ranges = pca9450_ldo5_volts,
+			.n_linear_ranges = ARRAY_SIZE(pca9450_ldo5_volts),
+			.vsel_reg = PCA9450_REG_LDO5CTRL_H,
+			.vsel_mask = LDO5HOUT_MASK,
+			.enable_reg = PCA9450_REG_LDO5CTRL_H,
+			.enable_mask = LDO5H_EN_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+};
+
+static irqreturn_t pca9450_irq_handler(int irq, void *data)
+{
+	struct pca9450 *pca9450 = data;
+	struct regmap *regmap = pca9450->regmap;
+	unsigned int status;
+	int ret;
+
+	ret = regmap_read(regmap, PCA9450_REG_INT1, &status);
+	if (ret < 0) {
+		dev_err(pca9450->dev,
+			"Failed to read INT1(%d)\n", ret);
+		return IRQ_NONE;
+	}
+
+	if (status & IRQ_PWRON)
+		dev_warn(pca9450->dev, "PWRON interrupt.\n");
+
+	if (status & IRQ_WDOGB)
+		dev_warn(pca9450->dev, "WDOGB interrupt.\n");
+
+	if (status & IRQ_VR_FLT1)
+		dev_warn(pca9450->dev, "VRFLT1 interrupt.\n");
+
+	if (status & IRQ_VR_FLT2)
+		dev_warn(pca9450->dev, "VRFLT2 interrupt.\n");
+
+	if (status & IRQ_LOWVSYS)
+		dev_warn(pca9450->dev, "LOWVSYS interrupt.\n");
+
+	if (status & IRQ_THERM_105)
+		dev_warn(pca9450->dev, "IRQ_THERM_105 interrupt.\n");
+
+	if (status & IRQ_THERM_125)
+		dev_warn(pca9450->dev, "IRQ_THERM_125 interrupt.\n");
+
+	return IRQ_HANDLED;
+}
+
+static int pca9450_i2c_probe(struct i2c_client *i2c,
+			     const struct i2c_device_id *id)
+{
+	enum pca9450_chip_type type = (unsigned int)(uintptr_t)
+				      of_device_get_match_data(&i2c->dev);
+	const struct pca9450_regulator_desc	*regulator_desc;
+	struct regulator_config config = { };
+	struct pca9450 *pca9450;
+	unsigned int device_id, i;
+	int ret;
+
+	if (!i2c->irq) {
+		dev_err(&i2c->dev, "No IRQ configured?\n");
+		return -EINVAL;
+	}
+
+	pca9450 = devm_kzalloc(&i2c->dev, sizeof(struct pca9450), GFP_KERNEL);
+	if (!pca9450)
+		return -ENOMEM;
+
+	switch (type) {
+	case PCA9450_TYPE_PCA9450A:
+		regulator_desc = pca9450a_regulators;
+		pca9450->rcnt = ARRAY_SIZE(pca9450a_regulators);
+		break;
+	case PCA9450_TYPE_PCA9450BC:
+		regulator_desc = pca9450bc_regulators;
+		pca9450->rcnt = ARRAY_SIZE(pca9450bc_regulators);
+		break;
+	default:
+		dev_err(&i2c->dev, "Unknown device type");
+		return -EINVAL;
+	}
+
+	pca9450->irq = i2c->irq;
+	pca9450->type = type;
+	pca9450->dev = &i2c->dev;
+
+	dev_set_drvdata(&i2c->dev, pca9450);
+
+	pca9450->regmap = devm_regmap_init_i2c(i2c,
+					       &pca9450_regmap_config);
+	if (IS_ERR(pca9450->regmap)) {
+		dev_err(&i2c->dev, "regmap initialization failed\n");
+		return PTR_ERR(pca9450->regmap);
+	}
+
+	ret = regmap_read(pca9450->regmap, PCA9450_REG_DEV_ID, &device_id);
+	if (ret) {
+		dev_err(&i2c->dev, "Read device id error\n");
+		return ret;
+	}
+
+	/* Check your board and dts for match the right pmic */
+	if (((device_id >> 4) != 0x1 && type == PCA9450_TYPE_PCA9450A) ||
+	    ((device_id >> 4) != 0x3 && type == PCA9450_TYPE_PCA9450BC)) {
+		dev_err(&i2c->dev, "Device id(%x) mismatched\n",
+			device_id >> 4);
+		return -EINVAL;
+	}
+
+	for (i = 0; i < pca9450->rcnt; i++) {
+		const struct regulator_desc *desc;
+		struct regulator_dev *rdev;
+		const struct pca9450_regulator_desc *r;
+
+		r = &regulator_desc[i];
+		desc = &r->desc;
+
+		config.regmap = pca9450->regmap;
+		config.dev = pca9450->dev;
+
+		rdev = devm_regulator_register(pca9450->dev, desc, &config);
+		if (IS_ERR(rdev)) {
+			ret = PTR_ERR(rdev);
+			dev_err(pca9450->dev,
+				"Failed to register regulator(%s): %d\n",
+				desc->name, ret);
+			return ret;
+		}
+	}
+
+	ret = devm_request_threaded_irq(pca9450->dev, pca9450->irq, NULL,
+					pca9450_irq_handler,
+					(IRQF_TRIGGER_FALLING | IRQF_ONESHOT),
+					"pca9450-irq", pca9450);
+	if (ret != 0) {
+		dev_err(pca9450->dev, "Failed to request IRQ: %d\n",
+			pca9450->irq);
+		return ret;
+	}
+	/* Unmask all interrupt except PWRON/WDOG/RSVD */
+	ret = regmap_update_bits(pca9450->regmap, PCA9450_REG_INT1_MSK,
+				IRQ_VR_FLT1 | IRQ_VR_FLT2 | IRQ_LOWVSYS |
+				IRQ_THERM_105 | IRQ_THERM_125,
+				IRQ_PWRON | IRQ_WDOGB | IRQ_RSVD);
+	if (ret) {
+		dev_err(&i2c->dev, "Unmask irq error\n");
+		return ret;
+	}
+
+	dev_info(&i2c->dev, "%s probed.\n",
+		type == PCA9450_TYPE_PCA9450A ? "pca9450a" : "pca9450bc");
+
+	return 0;
+}
+
+static const struct of_device_id pca9450_of_match[] = {
+	{
+		.compatible = "nxp,pca9450a",
+		.data = (void *)PCA9450_TYPE_PCA9450A,
+	},
+	{
+		.compatible = "nxp,pca9450b",
+		.data = (void *)PCA9450_TYPE_PCA9450BC,
+	},
+	{
+		.compatible = "nxp,pca9450c",
+		.data = (void *)PCA9450_TYPE_PCA9450BC,
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pca9450_of_match);
+
+static struct i2c_driver pca9450_i2c_driver = {
+	.driver = {
+		.name = "nxp-pca9450",
+		.of_match_table = pca9450_of_match,
+	},
+	.probe = pca9450_i2c_probe,
+};
+
+static int __init pca9450_i2c_init(void)
+{
+	return i2c_add_driver(&pca9450_i2c_driver);
+}
+module_init(pca9450_i2c_init);
+
+static void __exit pca9450_i2c_exit(void)
+{
+	i2c_del_driver(&pca9450_i2c_driver);
+}
+module_exit(pca9450_i2c_exit);
+
+MODULE_AUTHOR("Robin Gong <yibin.gong@nxp.com>");
+MODULE_DESCRIPTION("NXP PCA9450 Power Management IC driver");
+MODULE_LICENSE("GPL");