1 files changed, 879 insertions, 0 deletions
diff --git a/drivers/regulator/pf9453-regulator.c b/drivers/regulator/pf9453-regulator.c
new file mode 100644
index 000000000000..ed6bf0f6c4fe
--- /dev/null
+++ b/drivers/regulator/pf9453-regulator.c
@@ -0,0 +1,879 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2024 NXP.
+ * NXP PF9453 pmic driver
+ */
+
+#include <linux/bits.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.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/of_regulator.h>
+
+struct pf9453_dvs_config {
+	unsigned int run_reg; /* dvs0 */
+	unsigned int run_mask;
+	unsigned int standby_reg; /* dvs1 */
+	unsigned int standby_mask;
+};
+
+struct pf9453_regulator_desc {
+	struct regulator_desc desc;
+	const struct pf9453_dvs_config dvs;
+};
+
+struct pf9453 {
+	struct device *dev;
+	struct regmap *regmap;
+	struct gpio_desc *sd_vsel_gpio;
+	int irq;
+};
+
+enum {
+	PF9453_BUCK1 = 0,
+	PF9453_BUCK2,
+	PF9453_BUCK3,
+	PF9453_BUCK4,
+	PF9453_LDO1,
+	PF9453_LDO2,
+	PF9453_LDOSNVS,
+	PF9453_REGULATOR_CNT
+};
+
+enum {
+	PF9453_DVS_LEVEL_RUN = 0,
+	PF9453_DVS_LEVEL_STANDBY,
+	PF9453_DVS_LEVEL_DPSTANDBY,
+	PF9453_DVS_LEVEL_MAX
+};
+
+#define PF9453_BUCK1_VOLTAGE_NUM	0x80
+#define PF9453_BUCK2_VOLTAGE_NUM	0x80
+#define PF9453_BUCK3_VOLTAGE_NUM	0x80
+#define PF9453_BUCK4_VOLTAGE_NUM	0x80
+
+#define PF9453_LDO1_VOLTAGE_NUM		0x65
+#define PF9453_LDO2_VOLTAGE_NUM		0x3b
+#define PF9453_LDOSNVS_VOLTAGE_NUM	0x59
+
+enum {
+	PF9453_REG_DEV_ID		= 0x00,
+	PF9453_REG_OTP_VER		= 0x01,
+	PF9453_REG_INT1			= 0x02,
+	PF9453_REG_INT1_MASK		= 0x03,
+	PF9453_REG_INT1_STATUS		= 0x04,
+	PF9453_REG_VRFLT1_INT		= 0x05,
+	PF9453_REG_VRFLT1_MASK		= 0x06,
+	PF9453_REG_PWRON_STAT		= 0x07,
+	PF9453_REG_RESET_CTRL		= 0x08,
+	PF9453_REG_SW_RST		= 0x09,
+	PF9453_REG_PWR_CTRL		= 0x0a,
+	PF9453_REG_CONFIG1		= 0x0b,
+	PF9453_REG_CONFIG2		= 0x0c,
+	PF9453_REG_32K_CONFIG		= 0x0d,
+	PF9453_REG_BUCK1CTRL		= 0x10,
+	PF9453_REG_BUCK1OUT		= 0x11,
+	PF9453_REG_BUCK2CTRL		= 0x14,
+	PF9453_REG_BUCK2OUT		= 0x15,
+	PF9453_REG_BUCK2OUT_STBY	= 0x1d,
+	PF9453_REG_BUCK2OUT_MAX_LIMIT	= 0x1f,
+	PF9453_REG_BUCK2OUT_MIN_LIMIT	= 0x20,
+	PF9453_REG_BUCK3CTRL		= 0x21,
+	PF9453_REG_BUCK3OUT		= 0x22,
+	PF9453_REG_BUCK4CTRL		= 0x2e,
+	PF9453_REG_BUCK4OUT		= 0x2f,
+	PF9453_REG_LDO1OUT_L		= 0x36,
+	PF9453_REG_LDO1CFG		= 0x37,
+	PF9453_REG_LDO1OUT_H		= 0x38,
+	PF9453_REG_LDOSNVS_CFG1		= 0x39,
+	PF9453_REG_LDOSNVS_CFG2		= 0x3a,
+	PF9453_REG_LDO2CFG		= 0x3b,
+	PF9453_REG_LDO2OUT		= 0x3c,
+	PF9453_REG_BUCK_POK		= 0x3d,
+	PF9453_REG_LSW_CTRL1		= 0x40,
+	PF9453_REG_LSW_CTRL2		= 0x41,
+	PF9453_REG_LOCK			= 0x4e,
+	PF9453_MAX_REG
+};
+
+#define PF9453_UNLOCK_KEY		0x5c
+#define PF9453_LOCK_KEY			0x0
+
+/* PF9453 BUCK ENMODE bits */
+#define BUCK_ENMODE_OFF			0x00
+#define BUCK_ENMODE_ONREQ		0x01
+#define BUCK_ENMODE_ONREQ_STBY		0x02
+#define BUCK_ENMODE_ONREQ_STBY_DPSTBY	0x03
+
+/* PF9453 BUCK ENMODE bits */
+#define LDO_ENMODE_OFF			0x00
+#define LDO_ENMODE_ONREQ		0x01
+#define LDO_ENMODE_ONREQ_STBY		0x02
+#define LDO_ENMODE_ONREQ_STBY_DPSTBY	0x03
+
+/* PF9453_REG_BUCK1_CTRL bits */
+#define BUCK1_LPMODE			0x30
+#define BUCK1_AD			0x08
+#define BUCK1_FPWM			0x04
+#define BUCK1_ENMODE_MASK		GENMASK(1, 0)
+
+/* PF9453_REG_BUCK2_CTRL bits */
+#define BUCK2_RAMP_MASK			GENMASK(7, 6)
+#define BUCK2_RAMP_25MV			0x0
+#define BUCK2_RAMP_12P5MV		0x1
+#define BUCK2_RAMP_6P25MV		0x2
+#define BUCK2_RAMP_3P125MV		0x3
+#define BUCK2_LPMODE			0x30
+#define BUCK2_AD			0x08
+#define BUCK2_FPWM			0x04
+#define BUCK2_ENMODE_MASK		GENMASK(1, 0)
+
+/* PF9453_REG_BUCK3_CTRL bits */
+#define BUCK3_LPMODE			0x30
+#define BUCK3_AD			0x08
+#define BUCK3_FPWM			0x04
+#define BUCK3_ENMODE_MASK		GENMASK(1, 0)
+
+/* PF9453_REG_BUCK4_CTRL bits */
+#define BUCK4_LPMODE			0x30
+#define BUCK4_AD			0x08
+#define BUCK4_FPWM			0x04
+#define BUCK4_ENMODE_MASK		GENMASK(1, 0)
+
+/* PF9453_REG_BUCK123_PRESET_EN bit */
+#define BUCK123_PRESET_EN		0x80
+
+/* PF9453_BUCK1OUT bits */
+#define BUCK1OUT_MASK			GENMASK(6, 0)
+
+/* PF9453_BUCK2OUT bits */
+#define BUCK2OUT_MASK			GENMASK(6, 0)
+#define BUCK2OUT_STBY_MASK		GENMASK(6, 0)
+
+/* PF9453_REG_BUCK3OUT bits */
+#define BUCK3OUT_MASK			GENMASK(6, 0)
+
+/* PF9453_REG_BUCK4OUT bits */
+#define BUCK4OUT_MASK			GENMASK(6, 0)
+
+/* PF9453_REG_LDO1_VOLT bits */
+#define LDO1_EN_MASK			GENMASK(1, 0)
+#define LDO1OUT_MASK			GENMASK(6, 0)
+
+/* PF9453_REG_LDO2_VOLT bits */
+#define LDO2_EN_MASK			GENMASK(1, 0)
+#define LDO2OUT_MASK			GENMASK(6, 0)
+
+/* PF9453_REG_LDOSNVS_VOLT bits */
+#define LDOSNVS_EN_MASK			GENMASK(0, 0)
+#define LDOSNVSCFG1_MASK		GENMASK(6, 0)
+
+/* PF9453_REG_IRQ bits */
+#define IRQ_RSVD			0x80
+#define IRQ_RSTB			0x40
+#define IRQ_ONKEY			0x20
+#define IRQ_RESETKEY			0x10
+#define IRQ_VR_FLT1			0x08
+#define IRQ_LOWVSYS			0x04
+#define IRQ_THERM_100			0x02
+#define IRQ_THERM_80			0x01
+
+/* PF9453_REG_RESET_CTRL bits */
+#define WDOG_B_CFG_MASK			GENMASK(7, 6)
+#define WDOG_B_CFG_NONE			0x00
+#define WDOG_B_CFG_WARM			0x40
+#define WDOG_B_CFG_COLD			0x80
+
+/* PF9453_REG_CONFIG2 bits */
+#define I2C_LT_MASK			GENMASK(1, 0)
+#define I2C_LT_FORCE_DISABLE		0x00
+#define I2C_LT_ON_STANDBY_RUN		0x01
+#define I2C_LT_ON_RUN			0x02
+#define I2C_LT_FORCE_ENABLE		0x03
+
+static const struct regmap_range pf9453_status_range = {
+	.range_min = PF9453_REG_INT1,
+	.range_max = PF9453_REG_PWRON_STAT,
+};
+
+static const struct regmap_access_table pf9453_volatile_regs = {
+	.yes_ranges = &pf9453_status_range,
+	.n_yes_ranges = 1,
+};
+
+static const struct regmap_config pf9453_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.volatile_table = &pf9453_volatile_regs,
+	.max_register = PF9453_MAX_REG - 1,
+	.cache_type = REGCACHE_RBTREE,
+};
+
+/*
+ * BUCK2
+ * BUCK2RAM[1:0] BUCK2 DVS ramp rate setting
+ * 00: 25mV/1usec
+ * 01: 25mV/2usec
+ * 10: 25mV/4usec
+ * 11: 25mV/8usec
+ */
+static const unsigned int pf9453_dvs_buck_ramp_table[] = {
+	25000, 12500, 6250, 3125
+};
+
+static bool is_reg_protect(uint reg)
+{
+	switch (reg) {
+	case PF9453_REG_BUCK1OUT:
+	case PF9453_REG_BUCK2OUT:
+	case PF9453_REG_BUCK3OUT:
+	case PF9453_REG_BUCK4OUT:
+	case PF9453_REG_LDO1OUT_L:
+	case PF9453_REG_LDO1OUT_H:
+	case PF9453_REG_LDO2OUT:
+	case PF9453_REG_LDOSNVS_CFG1:
+	case PF9453_REG_BUCK2OUT_MAX_LIMIT:
+	case PF9453_REG_BUCK2OUT_MIN_LIMIT:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static int pf9453_pmic_write(struct pf9453 *pf9453, unsigned int reg, u8 mask, unsigned int val)
+{
+	int ret = -EINVAL;
+	u8 data, key;
+	u32 rxBuf;
+
+	/* If not updating entire register, perform a read-mod-write */
+	data = val;
+	key = PF9453_UNLOCK_KEY;
+
+	if (mask != 0xffU) {
+		/* Read data */
+		ret = regmap_read(pf9453->regmap, reg, &rxBuf);
+		if (ret) {
+			dev_err(pf9453->dev, "Read reg=%0x error!\n", reg);
+			return ret;
+		}
+		data = (val & mask) | (rxBuf & (~mask));
+	}
+
+	if (reg < PF9453_MAX_REG) {
+		if (is_reg_protect(reg)) {
+			ret = regmap_raw_write(pf9453->regmap, PF9453_REG_LOCK, &key, 1U);
+			if (ret) {
+				dev_err(pf9453->dev, "Write reg=%0x error!\n", reg);
+				return ret;
+			}
+
+			ret = regmap_raw_write(pf9453->regmap, reg, &data, 1U);
+			if (ret) {
+				dev_err(pf9453->dev, "Write reg=%0x error!\n", reg);
+				return ret;
+			}
+
+			key = PF9453_LOCK_KEY;
+			ret = regmap_raw_write(pf9453->regmap, PF9453_REG_LOCK, &key, 1U);
+			if (ret) {
+				dev_err(pf9453->dev, "Write reg=%0x error!\n", reg);
+				return ret;
+			}
+		} else {
+			ret = regmap_raw_write(pf9453->regmap, reg, &data, 1U);
+			if (ret) {
+				dev_err(pf9453->dev, "Write reg=%0x error!\n", reg);
+				return ret;
+			}
+		}
+	}
+
+	return ret;
+}
+
+/**
+ * pf9453_regulator_enable_regmap for regmap users
+ *
+ * @rdev: regulator to operate on
+ *
+ * Regulators that use regmap for their register I/O can set the
+ * enable_reg and enable_mask fields in their descriptor and then use
+ * this as their enable() operation, saving some code.
+ */
+static int pf9453_regulator_enable_regmap(struct regulator_dev *rdev)
+{
+	struct pf9453 *pf9453 = dev_get_drvdata(rdev->dev.parent);
+	unsigned int val;
+
+	if (rdev->desc->enable_is_inverted) {
+		val = rdev->desc->disable_val;
+	} else {
+		val = rdev->desc->enable_val;
+		if (!val)
+			val = rdev->desc->enable_mask;
+	}
+
+	return pf9453_pmic_write(pf9453, rdev->desc->enable_reg, rdev->desc->enable_mask, val);
+}
+
+/**
+ * pf9453_regulator_disable_regmap for regmap users
+ *
+ * @rdev: regulator to operate on
+ *
+ * Regulators that use regmap for their register I/O can set the
+ * enable_reg and enable_mask fields in their descriptor and then use
+ * this as their disable() operation, saving some code.
+ */
+static int pf9453_regulator_disable_regmap(struct regulator_dev *rdev)
+{
+	struct pf9453 *pf9453 = dev_get_drvdata(rdev->dev.parent);
+	unsigned int val;
+
+	if (rdev->desc->enable_is_inverted) {
+		val = rdev->desc->enable_val;
+		if (!val)
+			val = rdev->desc->enable_mask;
+	} else {
+		val = rdev->desc->disable_val;
+	}
+
+	return pf9453_pmic_write(pf9453, rdev->desc->enable_reg, rdev->desc->enable_mask, val);
+}
+
+/**
+ * pf9453_regulator_set_voltage_sel_regmap for regmap users
+ *
+ * @rdev: regulator to operate on
+ * @sel: Selector to set
+ *
+ * Regulators that use regmap for their register I/O can set the
+ * vsel_reg and vsel_mask fields in their descriptor and then use this
+ * as their set_voltage_vsel operation, saving some code.
+ */
+static int pf9453_regulator_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned int sel)
+{
+	struct pf9453 *pf9453 = dev_get_drvdata(rdev->dev.parent);
+	int ret;
+
+	sel <<= ffs(rdev->desc->vsel_mask) - 1;
+	ret = pf9453_pmic_write(pf9453, rdev->desc->vsel_reg, rdev->desc->vsel_mask, sel);
+	if (ret)
+		return ret;
+
+	if (rdev->desc->apply_bit)
+		ret = pf9453_pmic_write(pf9453, rdev->desc->apply_reg,
+					rdev->desc->apply_bit, rdev->desc->apply_bit);
+	return ret;
+}
+
+static int find_closest_bigger(unsigned int target, const unsigned int *table,
+			       unsigned int num_sel, unsigned int *sel)
+{
+	unsigned int s, tmp, max, maxsel = 0;
+	bool found = false;
+
+	max = table[0];
+
+	for (s = 0; s < num_sel; s++) {
+		if (table[s] > max) {
+			max = table[s];
+			maxsel = s;
+		}
+		if (table[s] >= target) {
+			if (!found || table[s] - target < tmp - target) {
+				tmp = table[s];
+				*sel = s;
+				found = true;
+				if (tmp == target)
+					break;
+			}
+		}
+	}
+
+	if (!found) {
+		*sel = maxsel;
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/**
+ * pf9453_regulator_set_ramp_delay_regmap
+ *
+ * @rdev: regulator to operate on
+ *
+ * Regulators that use regmap for their register I/O can set the ramp_reg
+ * and ramp_mask fields in their descriptor and then use this as their
+ * set_ramp_delay operation, saving some code.
+ */
+static int pf9453_regulator_set_ramp_delay_regmap(struct regulator_dev *rdev, int ramp_delay)
+{
+	struct pf9453 *pf9453 = dev_get_drvdata(rdev->dev.parent);
+	unsigned int sel;
+	int ret;
+
+	if (WARN_ON(!rdev->desc->n_ramp_values || !rdev->desc->ramp_delay_table))
+		return -EINVAL;
+
+	ret = find_closest_bigger(ramp_delay, rdev->desc->ramp_delay_table,
+				  rdev->desc->n_ramp_values, &sel);
+
+	if (ret) {
+		dev_warn(rdev_get_dev(rdev),
+			 "Can't set ramp-delay %u, setting %u\n", ramp_delay,
+			 rdev->desc->ramp_delay_table[sel]);
+	}
+
+	sel <<= ffs(rdev->desc->ramp_mask) - 1;
+
+	return pf9453_pmic_write(pf9453, rdev->desc->ramp_reg,
+				 rdev->desc->ramp_mask, sel);
+}
+
+static const struct regulator_ops pf9453_dvs_buck_regulator_ops = {
+	.enable = pf9453_regulator_enable_regmap,
+	.disable = pf9453_regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_voltage_linear_range,
+	.set_voltage_sel = pf9453_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	= pf9453_regulator_set_ramp_delay_regmap,
+};
+
+static const struct regulator_ops pf9453_buck_regulator_ops = {
+	.enable = pf9453_regulator_enable_regmap,
+	.disable = pf9453_regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_voltage_linear_range,
+	.set_voltage_sel = pf9453_regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.set_voltage_time_sel = regulator_set_voltage_time_sel,
+};
+
+static const struct regulator_ops pf9453_ldo_regulator_ops = {
+	.enable = pf9453_regulator_enable_regmap,
+	.disable = pf9453_regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.list_voltage = regulator_list_voltage_linear_range,
+	.set_voltage_sel = pf9453_regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+};
+
+/*
+ * BUCK1/3/4
+ * 0.60 to 3.775V (25mV step)
+ */
+static const struct linear_range pf9453_buck134_volts[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0x00, 0x7F, 25000),
+};
+
+/*
+ * BUCK2
+ * 0.60 to 2.1875V (12.5mV step)
+ */
+static const struct linear_range pf9453_buck2_volts[] = {
+	REGULATOR_LINEAR_RANGE(600000, 0x00, 0x7F, 12500),
+};
+
+/*
+ * LDO1
+ * 0.8 to 3.3V (25mV step)
+ */
+static const struct linear_range pf9453_ldo1_volts[] = {
+	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x64, 25000),
+};
+
+/*
+ * LDO2
+ * 0.5 to 1.95V (25mV step)
+ */
+static const struct linear_range pf9453_ldo2_volts[] = {
+	REGULATOR_LINEAR_RANGE(500000, 0x00, 0x3A, 25000),
+};
+
+/*
+ * LDOSNVS
+ * 1.2 to 3.4V (25mV step)
+ */
+static const struct linear_range pf9453_ldosnvs_volts[] = {
+	REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x58, 25000),
+};
+
+static int buck_set_dvs(const struct regulator_desc *desc,
+			struct device_node *np, struct pf9453 *pf9453,
+			char *prop, unsigned int reg, unsigned int mask)
+{
+	int ret, i;
+	u32 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 = pf9453_pmic_write(pf9453, reg, mask, i);
+			break;
+		}
+	}
+
+	if (ret == 0) {
+		struct pf9453_regulator_desc *regulator = container_of(desc,
+					struct pf9453_regulator_desc, desc);
+
+		/* Enable DVS control through PMIC_STBY_REQ for this BUCK */
+		ret = pf9453_pmic_write(pf9453, regulator->desc.enable_reg,
+					BUCK2_LPMODE, BUCK2_LPMODE);
+	}
+	return ret;
+}
+
+static int pf9453_set_dvs_levels(struct device_node *np, const struct regulator_desc *desc,
+				 struct regulator_config *cfg)
+{
+	struct pf9453_regulator_desc *data = container_of(desc, struct pf9453_regulator_desc, desc);
+	struct pf9453 *pf9453 = dev_get_drvdata(cfg->dev);
+	const struct pf9453_dvs_config *dvs = &data->dvs;
+	unsigned int reg, mask;
+	int i, ret = 0;
+	char *prop;
+
+	for (i = 0; i < PF9453_DVS_LEVEL_MAX; i++) {
+		switch (i) {
+		case PF9453_DVS_LEVEL_RUN:
+			prop = "nxp,dvs-run-voltage";
+			reg = dvs->run_reg;
+			mask = dvs->run_mask;
+			break;
+		case PF9453_DVS_LEVEL_DPSTANDBY:
+		case PF9453_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, pf9453, prop, reg, mask);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+static const struct pf9453_regulator_desc pf9453_regulators[] = {
+	{
+		.desc = {
+			.name = "buck1",
+			.of_match = of_match_ptr("BUCK1"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PF9453_BUCK1,
+			.ops = &pf9453_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PF9453_BUCK1_VOLTAGE_NUM,
+			.linear_ranges = pf9453_buck134_volts,
+			.n_linear_ranges = ARRAY_SIZE(pf9453_buck134_volts),
+			.vsel_reg = PF9453_REG_BUCK1OUT,
+			.vsel_mask = BUCK1OUT_MASK,
+			.enable_reg = PF9453_REG_BUCK1CTRL,
+			.enable_mask = BUCK1_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "buck2",
+			.of_match = of_match_ptr("BUCK2"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PF9453_BUCK2,
+			.ops = &pf9453_dvs_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PF9453_BUCK2_VOLTAGE_NUM,
+			.linear_ranges = pf9453_buck2_volts,
+			.n_linear_ranges = ARRAY_SIZE(pf9453_buck2_volts),
+			.vsel_reg = PF9453_REG_BUCK2OUT,
+			.vsel_mask = BUCK2OUT_MASK,
+			.enable_reg = PF9453_REG_BUCK2CTRL,
+			.enable_mask = BUCK2_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ,
+			.ramp_reg = PF9453_REG_BUCK2CTRL,
+			.ramp_mask = BUCK2_RAMP_MASK,
+			.ramp_delay_table = pf9453_dvs_buck_ramp_table,
+			.n_ramp_values = ARRAY_SIZE(pf9453_dvs_buck_ramp_table),
+			.owner = THIS_MODULE,
+			.of_parse_cb = pf9453_set_dvs_levels,
+		},
+		.dvs = {
+			.run_reg = PF9453_REG_BUCK2OUT,
+			.run_mask = BUCK2OUT_MASK,
+			.standby_reg = PF9453_REG_BUCK2OUT_STBY,
+			.standby_mask = BUCK2OUT_STBY_MASK,
+		},
+	},
+	{
+		.desc = {
+			.name = "buck3",
+			.of_match = of_match_ptr("BUCK3"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PF9453_BUCK3,
+			.ops = &pf9453_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PF9453_BUCK3_VOLTAGE_NUM,
+			.linear_ranges = pf9453_buck134_volts,
+			.n_linear_ranges = ARRAY_SIZE(pf9453_buck134_volts),
+			.vsel_reg = PF9453_REG_BUCK3OUT,
+			.vsel_mask = BUCK3OUT_MASK,
+			.enable_reg = PF9453_REG_BUCK3CTRL,
+			.enable_mask = BUCK3_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "buck4",
+			.of_match = of_match_ptr("BUCK4"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PF9453_BUCK4,
+			.ops = &pf9453_buck_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PF9453_BUCK4_VOLTAGE_NUM,
+			.linear_ranges = pf9453_buck134_volts,
+			.n_linear_ranges = ARRAY_SIZE(pf9453_buck134_volts),
+			.vsel_reg = PF9453_REG_BUCK4OUT,
+			.vsel_mask = BUCK4OUT_MASK,
+			.enable_reg = PF9453_REG_BUCK4CTRL,
+			.enable_mask = BUCK4_ENMODE_MASK,
+			.enable_val = BUCK_ENMODE_ONREQ,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldo1",
+			.of_match = of_match_ptr("LDO1"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PF9453_LDO1,
+			.ops = &pf9453_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PF9453_LDO1_VOLTAGE_NUM,
+			.linear_ranges = pf9453_ldo1_volts,
+			.n_linear_ranges = ARRAY_SIZE(pf9453_ldo1_volts),
+			.vsel_reg = PF9453_REG_LDO1OUT_H,
+			.vsel_mask = LDO1OUT_MASK,
+			.enable_reg = PF9453_REG_LDO1CFG,
+			.enable_mask = LDO1_EN_MASK,
+			.enable_val = LDO_ENMODE_ONREQ,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldo2",
+			.of_match = of_match_ptr("LDO2"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PF9453_LDO2,
+			.ops = &pf9453_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PF9453_LDO2_VOLTAGE_NUM,
+			.linear_ranges = pf9453_ldo2_volts,
+			.n_linear_ranges = ARRAY_SIZE(pf9453_ldo2_volts),
+			.vsel_reg = PF9453_REG_LDO2OUT,
+			.vsel_mask = LDO2OUT_MASK,
+			.enable_reg = PF9453_REG_LDO2CFG,
+			.enable_mask = LDO2_EN_MASK,
+			.enable_val = LDO_ENMODE_ONREQ,
+			.owner = THIS_MODULE,
+		},
+	},
+	{
+		.desc = {
+			.name = "ldosnvs",
+			.of_match = of_match_ptr("LDO-SNVS"),
+			.regulators_node = of_match_ptr("regulators"),
+			.id = PF9453_LDOSNVS,
+			.ops = &pf9453_ldo_regulator_ops,
+			.type = REGULATOR_VOLTAGE,
+			.n_voltages = PF9453_LDOSNVS_VOLTAGE_NUM,
+			.linear_ranges = pf9453_ldosnvs_volts,
+			.n_linear_ranges = ARRAY_SIZE(pf9453_ldosnvs_volts),
+			.vsel_reg = PF9453_REG_LDOSNVS_CFG1,
+			.vsel_mask = LDOSNVSCFG1_MASK,
+			.enable_reg = PF9453_REG_LDOSNVS_CFG2,
+			.enable_mask = LDOSNVS_EN_MASK,
+			.owner = THIS_MODULE,
+		},
+	},
+	{ }
+};
+
+static irqreturn_t pf9453_irq_handler(int irq, void *data)
+{
+	struct pf9453 *pf9453 = data;
+	struct regmap *regmap = pf9453->regmap;
+	unsigned int status;
+	int ret;
+
+	ret = regmap_read(regmap, PF9453_REG_INT1, &status);
+	if (ret < 0) {
+		dev_err(pf9453->dev, "Failed to read INT1(%d)\n", ret);
+		return IRQ_NONE;
+	}
+
+	if (status & IRQ_RSTB)
+		dev_warn(pf9453->dev, "IRQ_RSTB interrupt.\n");
+
+	if (status & IRQ_ONKEY)
+		dev_warn(pf9453->dev, "IRQ_ONKEY interrupt.\n");
+
+	if (status & IRQ_VR_FLT1)
+		dev_warn(pf9453->dev, "VRFLT1 interrupt.\n");
+
+	if (status & IRQ_RESETKEY)
+		dev_warn(pf9453->dev, "IRQ_RESETKEY interrupt.\n");
+
+	if (status & IRQ_LOWVSYS)
+		dev_warn(pf9453->dev, "LOWVSYS interrupt.\n");
+
+	if (status & IRQ_THERM_100)
+		dev_warn(pf9453->dev, "IRQ_THERM_100 interrupt.\n");
+
+	if (status & IRQ_THERM_80)
+		dev_warn(pf9453->dev, "IRQ_THERM_80 interrupt.\n");
+
+	return IRQ_HANDLED;
+}
+
+static int pf9453_i2c_probe(struct i2c_client *i2c)
+{
+	const struct pf9453_regulator_desc *regulator_desc = of_device_get_match_data(&i2c->dev);
+	struct regulator_config config = { };
+	unsigned int reset_ctrl;
+	unsigned int device_id;
+	struct pf9453 *pf9453;
+	int ret;
+
+	if (!i2c->irq)
+		return dev_err_probe(&i2c->dev, -EINVAL, "No IRQ configured?\n");
+
+	pf9453 = devm_kzalloc(&i2c->dev, sizeof(struct pf9453), GFP_KERNEL);
+	if (!pf9453)
+		return -ENOMEM;
+
+	pf9453->regmap = devm_regmap_init_i2c(i2c, &pf9453_regmap_config);
+	if (IS_ERR(pf9453->regmap))
+		return dev_err_probe(&i2c->dev, PTR_ERR(pf9453->regmap),
+				     "regmap initialization failed\n");
+
+	pf9453->irq = i2c->irq;
+	pf9453->dev = &i2c->dev;
+
+	dev_set_drvdata(&i2c->dev, pf9453);
+
+	ret = regmap_read(pf9453->regmap, PF9453_REG_DEV_ID, &device_id);
+	if (ret)
+		return dev_err_probe(&i2c->dev, ret, "Read device id error\n");
+
+	/* Check your board and dts for match the right pmic */
+	if ((device_id >> 4) != 0xb)
+		return dev_err_probe(&i2c->dev, -EINVAL, "Device id(%x) mismatched\n",
+				     device_id >> 4);
+
+	while (regulator_desc->desc.name) {
+		const struct regulator_desc *desc;
+		struct regulator_dev *rdev;
+
+		desc = &regulator_desc->desc;
+
+		config.regmap = pf9453->regmap;
+		config.dev = pf9453->dev;
+
+		rdev = devm_regulator_register(pf9453->dev, desc, &config);
+		if (IS_ERR(rdev))
+			return dev_err_probe(pf9453->dev, PTR_ERR(rdev),
+					     "Failed to register regulator(%s)\n", desc->name);
+
+		regulator_desc++;
+	}
+
+	ret = devm_request_threaded_irq(pf9453->dev, pf9453->irq, NULL, pf9453_irq_handler,
+					(IRQF_TRIGGER_FALLING | IRQF_ONESHOT),
+					"pf9453-irq", pf9453);
+	if (ret)
+		return dev_err_probe(pf9453->dev, ret, "Failed to request IRQ: %d\n", pf9453->irq);
+
+	/* Unmask all interrupt except PWRON/WDOG/RSVD */
+	ret = pf9453_pmic_write(pf9453, PF9453_REG_INT1_MASK,
+				IRQ_ONKEY | IRQ_RESETKEY | IRQ_RSTB | IRQ_VR_FLT1
+				| IRQ_LOWVSYS | IRQ_THERM_100 | IRQ_THERM_80, IRQ_RSVD);
+	if (ret)
+		return dev_err_probe(&i2c->dev, ret, "Unmask irq error\n");
+
+	if (of_property_read_bool(i2c->dev.of_node, "nxp,wdog_b-warm-reset"))
+		reset_ctrl = WDOG_B_CFG_WARM;
+	else
+		reset_ctrl = WDOG_B_CFG_COLD;
+
+	/* Set reset behavior on assertion of WDOG_B signal */
+	ret = pf9453_pmic_write(pf9453, PF9453_REG_RESET_CTRL, WDOG_B_CFG_MASK, reset_ctrl);
+	if (ret)
+		return dev_err_probe(&i2c->dev, ret, "Failed to set WDOG_B reset behavior\n");
+
+	/*
+	 * The driver uses the LDO1OUT_H register to control the LDO1 regulator.
+	 * This is only valid if the SD_VSEL input of the PMIC is high. Let's
+	 * check if the pin is available as GPIO and set it to high.
+	 */
+	pf9453->sd_vsel_gpio = gpiod_get_optional(pf9453->dev, "sd-vsel", GPIOD_OUT_HIGH);
+
+	if (IS_ERR(pf9453->sd_vsel_gpio))
+		return dev_err_probe(&i2c->dev, PTR_ERR(pf9453->sd_vsel_gpio),
+				     "Failed to get SD_VSEL GPIO\n");
+
+	return 0;
+}
+
+static const struct of_device_id pf9453_of_match[] = {
+	{
+		.compatible = "nxp,pf9453",
+		.data = pf9453_regulators,
+	},
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pf9453_of_match);
+
+static struct i2c_driver pf9453_i2c_driver = {
+	.driver = {
+		.name = "nxp-pf9453",
+		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
+		.of_match_table = pf9453_of_match,
+	},
+	.probe = pf9453_i2c_probe,
+};
+
+module_i2c_driver(pf9453_i2c_driver);
+
+MODULE_AUTHOR("Joy Zou <joy.zou@nxp.com>");
+MODULE_DESCRIPTION("NXP PF9453 Power Management IC driver");
+MODULE_LICENSE("GPL");