drivers/regulator/pf1550-regulator.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 //
 // regulator driver for the PF1550
 //
 // Copyright (C) 2016 Freescale Semiconductor, Inc.
 // Robin Gong <yibin.gong@freescale.com>
 //
 // Portions Copyright (c) 2025 Savoir-faire Linux Inc.
 // Samuel Kayode <samuel.kayode@savoirfairelinux.com>
 //

 #include <linux/err.h>
 #include <linux/interrupt.h>
 #include <linux/mfd/pf1550.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>

 #define PF1550_REGULATOR_IRQ_NR		11
 #define PF1550_MAX_REGULATOR		7

 struct pf1550_desc {
 	struct regulator_desc desc;
 	unsigned char stby_reg;
 	unsigned char stby_mask;
 	unsigned char stby_enable_reg;
 	unsigned char stby_enable_mask;
 };

 struct pf1550_regulator_info {
 	struct device *dev;
 	const struct pf1550_ddata *pf1550;
 	struct pf1550_desc regulator_descs[PF1550_MAX_REGULATOR];
 	struct regulator_dev *rdevs[PF1550_MAX_REGULATOR];
 };

 static const int pf1550_sw12_volts[] = {
 	1100000, 1200000, 1350000, 1500000, 1800000, 2500000, 3000000, 3300000,
 };

 static const int pf1550_ldo13_volts[] = {
 	750000, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000,
 	1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000,
 	1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000,
 	2600000, 2700000, 2800000, 2900000, 3000000, 3100000, 3200000, 3300000,
 };

 static int pf1550_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 {
 	int id = rdev_get_id(rdev);
 	unsigned int ramp_bits = 0;
 	int ret;

 	if (id > PF1550_VREFDDR)
 		return -EACCES;

 	if (ramp_delay < 0 || ramp_delay > 6250)
 		return -EINVAL;

 	ramp_delay = 6250 / ramp_delay;
 	ramp_bits = ramp_delay >> 1;

 	ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg + 4, 0x10,
 				 ramp_bits << 4);
 	if (ret < 0)
 		dev_err(&rdev->dev, "ramp failed, err %d\n", ret);

 	return ret;
 }

 static int pf1550_set_suspend_enable(struct regulator_dev *rdev)
 {
 	const struct pf1550_desc *desc = container_of_const(rdev->desc,
 							    struct pf1550_desc,
 							    desc);
 	unsigned int val = desc->stby_enable_mask;

 	return regmap_update_bits(rdev->regmap, desc->stby_enable_reg,
 				  desc->stby_enable_mask, val);
 }

 static int pf1550_set_suspend_disable(struct regulator_dev *rdev)
 {
 	const struct pf1550_desc *desc = container_of_const(rdev->desc,
 							    struct pf1550_desc,
 							    desc);

 	return regmap_update_bits(rdev->regmap, desc->stby_enable_reg,
 				  desc->stby_enable_mask, 0);
 }

 static int pf1550_buck_set_table_suspend_voltage(struct regulator_dev *rdev,
 						 int uV)
 {
 	const struct pf1550_desc *desc = container_of_const(rdev->desc,
 							    struct pf1550_desc,
 							    desc);
 	int ret;

 	ret = regulator_map_voltage_ascend(rdev, uV, uV);
 	if (ret < 0) {
 		dev_err(rdev_get_dev(rdev), "failed to map %i uV\n", uV);
 		return ret;
 	}

 	return regmap_update_bits(rdev->regmap, desc->stby_reg,
 				  desc->stby_mask, ret);
 }

 static int pf1550_buck_set_linear_suspend_voltage(struct regulator_dev *rdev,
 						  int uV)
 {
 	const struct pf1550_desc *desc = container_of_const(rdev->desc,
 							    struct pf1550_desc,
 							    desc);
 	int ret;

 	ret = regulator_map_voltage_linear(rdev, uV, uV);
 	if (ret < 0) {
 		dev_err(rdev_get_dev(rdev), "failed to map %i uV\n", uV);
 		return ret;
 	}

 	return regmap_update_bits(rdev->regmap, desc->stby_reg,
 				  desc->stby_mask, ret);
 }

 static const struct regulator_ops pf1550_sw1_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.set_suspend_enable = pf1550_set_suspend_enable,
 	.set_suspend_disable = pf1550_set_suspend_disable,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_voltage_table,
 	.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_suspend_voltage = pf1550_buck_set_table_suspend_voltage,
 	.map_voltage = regulator_map_voltage_ascend,
 	.set_ramp_delay = pf1550_set_ramp_delay,
 };

 static const struct regulator_ops pf1550_sw2_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.set_suspend_enable = pf1550_set_suspend_enable,
 	.set_suspend_disable = pf1550_set_suspend_disable,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_voltage_linear,
 	.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_suspend_voltage = pf1550_buck_set_linear_suspend_voltage,
 	.map_voltage = regulator_map_voltage_linear,
 	.set_ramp_delay = pf1550_set_ramp_delay,
 };

 static const struct regulator_ops pf1550_ldo1_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.set_suspend_enable = pf1550_set_suspend_enable,
 	.set_suspend_disable = pf1550_set_suspend_disable,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_voltage_table,
 	.map_voltage = regulator_map_voltage_ascend,
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 };

 static const struct regulator_ops pf1550_ldo2_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.set_suspend_enable = pf1550_set_suspend_enable,
 	.set_suspend_disable = pf1550_set_suspend_disable,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_voltage_linear,
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 	.map_voltage = regulator_map_voltage_linear,
 };

 static const struct regulator_ops pf1550_fixed_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.set_suspend_enable = pf1550_set_suspend_enable,
 	.set_suspend_disable = pf1550_set_suspend_disable,
 	.is_enabled = regulator_is_enabled_regmap,
 	.list_voltage = regulator_list_voltage_linear,
 };

 #define PF_VREF(_chip, match, _name, voltage)	{	\
 	.desc = {	\
 		.name = #_name,	\
 		.of_match = of_match_ptr(match),	\
 		.regulators_node = of_match_ptr("regulators"),	\
 		.n_voltages = 1,	\
 		.ops = &pf1550_fixed_ops,	\
 		.type = REGULATOR_VOLTAGE,	\
 		.id = _chip ## _ ## _name,	\
 		.owner = THIS_MODULE,	\
 		.min_uV = (voltage),	\
 		.enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
 		.enable_mask = 0x1,	\
 	},	\
 	.stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
 	.stby_enable_mask = 0x2,	\
 }

 #define PF_SW(_chip, match, _name, min, max, mask, step)	{	\
 	.desc = {	\
 		.name = #_name,	\
 		.of_match = of_match_ptr(match),	\
 		.regulators_node = of_match_ptr("regulators"),	\
 		.n_voltages = ((max) - (min)) / (step) + 1,	\
 		.ops = &pf1550_sw2_ops,	\
 		.type = REGULATOR_VOLTAGE,	\
 		.id = _chip ## _ ## _name,	\
 		.owner = THIS_MODULE,	\
 		.min_uV = (min),	\
 		.uV_step = (step),	\
 		.linear_min_sel = 0,	\
 		.vsel_reg = _chip ## _PMIC_REG_ ## _name ## _VOLT, \
 		.vsel_mask = (mask),	\
 		.enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
 		.enable_mask = 0x1,	\
 	},	\
 	.stby_reg = _chip ## _PMIC_REG_ ## _name ## _STBY_VOLT,	\
 	.stby_mask = (mask),	\
 	.stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
 	.stby_enable_mask = 0x2,	\
 }

 #define PF_LDO1(_chip, match, _name, mask, voltages)	{	\
 	.desc = {	\
 		.name = #_name,	\
 		.of_match = of_match_ptr(match),	\
 		.regulators_node = of_match_ptr("regulators"),	\
 		.n_voltages = ARRAY_SIZE(voltages),	\
 		.ops = &pf1550_ldo1_ops,	\
 		.type = REGULATOR_VOLTAGE,	\
 		.id = _chip ## _ ## _name,	\
 		.owner = THIS_MODULE,	\
 		.volt_table = voltages, \
 		.vsel_reg = _chip ## _PMIC_REG_ ## _name ## _VOLT, \
 		.vsel_mask = (mask),	\
 		.enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
 		.enable_mask = 0x1,	\
 	},	\
 	.stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
 	.stby_enable_mask = 0x2,	\
 }

 #define PF_LDO2(_chip, match, _name, mask, min, max, step)	{	\
 	.desc = {	\
 		.name = #_name,	\
 		.of_match = of_match_ptr(match),	\
 		.regulators_node = of_match_ptr("regulators"),	\
 		.n_voltages = ((max) - (min)) / (step) + 1,	\
 		.ops = &pf1550_ldo2_ops,	\
 		.type = REGULATOR_VOLTAGE,	\
 		.id = _chip ## _ ## _name,	\
 		.owner = THIS_MODULE,	\
 		.min_uV = (min),	\
 		.uV_step = (step),	\
 		.linear_min_sel = 0,	\
 		.vsel_reg = _chip ## _PMIC_REG_ ## _name ## _VOLT, \
 		.vsel_mask = (mask),	\
 		.enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
 		.enable_mask = 0x1,	\
 	},	\
 	.stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
 	.stby_enable_mask = 0x2,	\
 }

 static struct pf1550_desc pf1550_regulators[] = {
 	PF_SW(PF1550, "sw1", SW1, 600000, 1387500, 0x3f, 12500),
 	PF_SW(PF1550, "sw2", SW2, 600000, 1387500, 0x3f, 12500),
 	PF_SW(PF1550, "sw3", SW3, 1800000, 3300000, 0xf, 100000),
 	PF_VREF(PF1550, "vrefddr", VREFDDR, 1200000),
 	PF_LDO1(PF1550, "ldo1", LDO1, 0x1f, pf1550_ldo13_volts),
 	PF_LDO2(PF1550, "ldo2", LDO2, 0xf, 1800000, 3300000, 100000),
 	PF_LDO1(PF1550, "ldo3", LDO3, 0x1f, pf1550_ldo13_volts),
 };

 static irqreturn_t pf1550_regulator_irq_handler(int irq, void *data)
 {
 	struct pf1550_regulator_info *info = data;
 	struct device *dev = info->dev;
 	struct platform_device *pdev = to_platform_device(dev);
 	int i, irq_type = -1;
 	unsigned int event;

 	for (i = 0; i < PF1550_REGULATOR_IRQ_NR; i++)
 		if (irq == platform_get_irq(pdev, i))
 			irq_type = i;

 	switch (irq_type) {
 	/* The _LS interrupts indicate over-current event. The _HS interrupts
 	 * which are more accurate and can detect catastrophic faults, issue
 	 * an error event. The current limit FAULT interrupt is similar to the
 	 * _HS'
 	 */
 	case PF1550_PMIC_IRQ_SW1_LS:
 	case PF1550_PMIC_IRQ_SW2_LS:
 	case PF1550_PMIC_IRQ_SW3_LS:
 		event = REGULATOR_EVENT_OVER_CURRENT_WARN;
 		for (i = 0; i < PF1550_MAX_REGULATOR; i++)
 			if (!strcmp(rdev_get_name(info->rdevs[i]), "SW3"))
 				regulator_notifier_call_chain(info->rdevs[i],
 							      event, NULL);
 		break;
 	case PF1550_PMIC_IRQ_SW1_HS:
 	case PF1550_PMIC_IRQ_SW2_HS:
 	case PF1550_PMIC_IRQ_SW3_HS:
 		event = REGULATOR_EVENT_OVER_CURRENT;
 		for (i = 0; i < PF1550_MAX_REGULATOR; i++)
 			if (!strcmp(rdev_get_name(info->rdevs[i]), "SW3"))
 				regulator_notifier_call_chain(info->rdevs[i],
 							      event, NULL);
 		break;
 	case PF1550_PMIC_IRQ_LDO1_FAULT:
 	case PF1550_PMIC_IRQ_LDO2_FAULT:
 	case PF1550_PMIC_IRQ_LDO3_FAULT:
 		event = REGULATOR_EVENT_OVER_CURRENT;
 		for (i = 0; i < PF1550_MAX_REGULATOR; i++)
 			if (!strcmp(rdev_get_name(info->rdevs[i]), "LDO3"))
 				regulator_notifier_call_chain(info->rdevs[i],
 							      event, NULL);
 		break;
 	case PF1550_PMIC_IRQ_TEMP_110:
 	case PF1550_PMIC_IRQ_TEMP_125:
 		event = REGULATOR_EVENT_OVER_TEMP;
 		for (i = 0; i < PF1550_MAX_REGULATOR; i++)
 			regulator_notifier_call_chain(info->rdevs[i],
 						      event, NULL);
 		break;
 	default:
 		dev_err(dev, "regulator interrupt: irq %d occurred\n",
 			irq_type);
 	}

 	return IRQ_HANDLED;
 }

 static int pf1550_regulator_probe(struct platform_device *pdev)
 {
 	const struct pf1550_ddata *pf1550 = dev_get_drvdata(pdev->dev.parent);
 	struct regulator_config config = { };
 	struct pf1550_regulator_info *info;
 	int i, irq = -1, ret = 0;

 	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
 	if (!info)
 		return -ENOMEM;

 	config.regmap = dev_get_regmap(pf1550->dev, NULL);
 	if (!config.regmap)
 		return dev_err_probe(&pdev->dev, -ENODEV,
 				     "failed to get parent regmap\n");

 	config.dev = pf1550->dev;
 	config.regmap = pf1550->regmap;
 	info->dev = &pdev->dev;
 	info->pf1550 = pf1550;

 	memcpy(info->regulator_descs, pf1550_regulators,
 	       sizeof(info->regulator_descs));

 	for (i = 0; i < ARRAY_SIZE(pf1550_regulators); i++) {
 		struct regulator_desc *desc;

 		desc = &info->regulator_descs[i].desc;

 		if ((desc->id == PF1550_SW2 && !pf1550->dvs2_enable) ||
 		    (desc->id == PF1550_SW1 && !pf1550->dvs1_enable)) {
 			/* OTP_SW2_DVS_ENB == 1? or OTP_SW1_DVS_ENB == 1? */
 			desc->volt_table = pf1550_sw12_volts;
 			desc->n_voltages = ARRAY_SIZE(pf1550_sw12_volts);
 			desc->ops = &pf1550_sw1_ops;
 		}

 		info->rdevs[i] = devm_regulator_register(&pdev->dev, desc,
 							 &config);
 		if (IS_ERR(info->rdevs[i]))
 			return dev_err_probe(&pdev->dev,
 					     PTR_ERR(info->rdevs[i]),
 					     "failed to initialize regulator-%d\n",
 					     i);
 	}

 	platform_set_drvdata(pdev, info);

 	for (i = 0; i < PF1550_REGULATOR_IRQ_NR; i++) {
 		irq = platform_get_irq(pdev, i);
 		if (irq < 0)
 			return irq;

 		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
 						pf1550_regulator_irq_handler,
 						IRQF_NO_SUSPEND,
 						"pf1550-regulator", info);
 		if (ret)
 			return dev_err_probe(&pdev->dev, ret,
 					     "failed: irq request (IRQ: %d)\n",
 					     i);
 	}

 	return 0;
 }

 static const struct platform_device_id pf1550_regulator_id[] = {
 	{ "pf1550-regulator", },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(platform, pf1550_regulator_id);

 static struct platform_driver pf1550_regulator_driver = {
 	.driver = {
 		   .name = "pf1550-regulator",
 		   },
 	.probe = pf1550_regulator_probe,
 	.id_table = pf1550_regulator_id,
 };
 module_platform_driver(pf1550_regulator_driver);

 MODULE_DESCRIPTION("NXP PF1550 regulator driver");
 MODULE_AUTHOR("Robin Gong <yibin.gong@freescale.com>");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0
	//
	// regulator driver for the PF1550
	//
	// Copyright (C) 2016 Freescale Semiconductor, Inc.
	// Robin Gong <yibin.gong@freescale.com>
	//
	// Portions Copyright (c) 2025 Savoir-faire Linux Inc.
	// Samuel Kayode <samuel.kayode@savoirfairelinux.com>
	//

	#include <linux/err.h>
	#include <linux/interrupt.h>
	#include <linux/mfd/pf1550.h>
	#include <linux/module.h>
	#include <linux/platform_device.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>

	#define PF1550_REGULATOR_IRQ_NR 11
	#define PF1550_MAX_REGULATOR 7

	struct pf1550_desc {
	struct regulator_desc desc;
	unsigned char stby_reg;
	unsigned char stby_mask;
	unsigned char stby_enable_reg;
	unsigned char stby_enable_mask;
	};

	struct pf1550_regulator_info {
	struct device *dev;
	const struct pf1550_ddata *pf1550;
	struct pf1550_desc regulator_descs[PF1550_MAX_REGULATOR];
	struct regulator_dev *rdevs[PF1550_MAX_REGULATOR];
	};

	static const int pf1550_sw12_volts[] = {
	1100000, 1200000, 1350000, 1500000, 1800000, 2500000, 3000000, 3300000,
	};

	static const int pf1550_ldo13_volts[] = {
	750000, 800000, 850000, 900000, 950000, 1000000, 1050000, 1100000,
	1150000, 1200000, 1250000, 1300000, 1350000, 1400000, 1450000, 1500000,
	1800000, 1900000, 2000000, 2100000, 2200000, 2300000, 2400000, 2500000,
	2600000, 2700000, 2800000, 2900000, 3000000, 3100000, 3200000, 3300000,
	};

	static int pf1550_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
	{
	int id = rdev_get_id(rdev);
	unsigned int ramp_bits = 0;
	int ret;

	if (id > PF1550_VREFDDR)
	return -EACCES;

	if (ramp_delay < 0 \|\| ramp_delay > 6250)
	return -EINVAL;

	ramp_delay = 6250 / ramp_delay;
	ramp_bits = ramp_delay >> 1;

	ret = regmap_update_bits(rdev->regmap, rdev->desc->vsel_reg + 4, 0x10,
	ramp_bits << 4);
	if (ret < 0)
	dev_err(&rdev->dev, "ramp failed, err %d\n", ret);

	return ret;
	}

	static int pf1550_set_suspend_enable(struct regulator_dev *rdev)
	{
	const struct pf1550_desc *desc = container_of_const(rdev->desc,
	struct pf1550_desc,
	desc);
	unsigned int val = desc->stby_enable_mask;

	return regmap_update_bits(rdev->regmap, desc->stby_enable_reg,
	desc->stby_enable_mask, val);
	}

	static int pf1550_set_suspend_disable(struct regulator_dev *rdev)
	{
	const struct pf1550_desc *desc = container_of_const(rdev->desc,
	struct pf1550_desc,
	desc);

	return regmap_update_bits(rdev->regmap, desc->stby_enable_reg,
	desc->stby_enable_mask, 0);
	}

	static int pf1550_buck_set_table_suspend_voltage(struct regulator_dev *rdev,
	int uV)
	{
	const struct pf1550_desc *desc = container_of_const(rdev->desc,
	struct pf1550_desc,
	desc);
	int ret;

	ret = regulator_map_voltage_ascend(rdev, uV, uV);
	if (ret < 0) {
	dev_err(rdev_get_dev(rdev), "failed to map %i uV\n", uV);
	return ret;
	}

	return regmap_update_bits(rdev->regmap, desc->stby_reg,
	desc->stby_mask, ret);
	}

	static int pf1550_buck_set_linear_suspend_voltage(struct regulator_dev *rdev,
	int uV)
	{
	const struct pf1550_desc *desc = container_of_const(rdev->desc,
	struct pf1550_desc,
	desc);
	int ret;

	ret = regulator_map_voltage_linear(rdev, uV, uV);
	if (ret < 0) {
	dev_err(rdev_get_dev(rdev), "failed to map %i uV\n", uV);
	return ret;
	}

	return regmap_update_bits(rdev->regmap, desc->stby_reg,
	desc->stby_mask, ret);
	}

	static const struct regulator_ops pf1550_sw1_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.set_suspend_enable = pf1550_set_suspend_enable,
	.set_suspend_disable = pf1550_set_suspend_disable,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_table,
	.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_suspend_voltage = pf1550_buck_set_table_suspend_voltage,
	.map_voltage = regulator_map_voltage_ascend,
	.set_ramp_delay = pf1550_set_ramp_delay,
	};

	static const struct regulator_ops pf1550_sw2_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.set_suspend_enable = pf1550_set_suspend_enable,
	.set_suspend_disable = pf1550_set_suspend_disable,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear,
	.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_suspend_voltage = pf1550_buck_set_linear_suspend_voltage,
	.map_voltage = regulator_map_voltage_linear,
	.set_ramp_delay = pf1550_set_ramp_delay,
	};

	static const struct regulator_ops pf1550_ldo1_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.set_suspend_enable = pf1550_set_suspend_enable,
	.set_suspend_disable = pf1550_set_suspend_disable,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_table,
	.map_voltage = regulator_map_voltage_ascend,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	};

	static const struct regulator_ops pf1550_ldo2_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.set_suspend_enable = pf1550_set_suspend_enable,
	.set_suspend_disable = pf1550_set_suspend_disable,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.map_voltage = regulator_map_voltage_linear,
	};

	static const struct regulator_ops pf1550_fixed_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.set_suspend_enable = pf1550_set_suspend_enable,
	.set_suspend_disable = pf1550_set_suspend_disable,
	.is_enabled = regulator_is_enabled_regmap,
	.list_voltage = regulator_list_voltage_linear,
	};

	#define PF_VREF(_chip, match, _name, voltage) { \
	.desc = { \
	.name = #_name, \
	.of_match = of_match_ptr(match), \
	.regulators_node = of_match_ptr("regulators"), \
	.n_voltages = 1, \
	.ops = &pf1550_fixed_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _chip ## _ ## _name, \
	.owner = THIS_MODULE, \
	.min_uV = (voltage), \
	.enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
	.enable_mask = 0x1, \
	}, \
	.stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
	.stby_enable_mask = 0x2, \
	}

	#define PF_SW(_chip, match, _name, min, max, mask, step) { \
	.desc = { \
	.name = #_name, \
	.of_match = of_match_ptr(match), \
	.regulators_node = of_match_ptr("regulators"), \
	.n_voltages = ((max) - (min)) / (step) + 1, \
	.ops = &pf1550_sw2_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _chip ## _ ## _name, \
	.owner = THIS_MODULE, \
	.min_uV = (min), \
	.uV_step = (step), \
	.linear_min_sel = 0, \
	.vsel_reg = _chip ## _PMIC_REG_ ## _name ## _VOLT, \
	.vsel_mask = (mask), \
	.enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
	.enable_mask = 0x1, \
	}, \
	.stby_reg = _chip ## _PMIC_REG_ ## _name ## _STBY_VOLT, \
	.stby_mask = (mask), \
	.stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
	.stby_enable_mask = 0x2, \
	}

	#define PF_LDO1(_chip, match, _name, mask, voltages) { \
	.desc = { \
	.name = #_name, \
	.of_match = of_match_ptr(match), \
	.regulators_node = of_match_ptr("regulators"), \
	.n_voltages = ARRAY_SIZE(voltages), \
	.ops = &pf1550_ldo1_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _chip ## _ ## _name, \
	.owner = THIS_MODULE, \
	.volt_table = voltages, \
	.vsel_reg = _chip ## _PMIC_REG_ ## _name ## _VOLT, \
	.vsel_mask = (mask), \
	.enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
	.enable_mask = 0x1, \
	}, \
	.stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
	.stby_enable_mask = 0x2, \
	}

	#define PF_LDO2(_chip, match, _name, mask, min, max, step) { \
	.desc = { \
	.name = #_name, \
	.of_match = of_match_ptr(match), \
	.regulators_node = of_match_ptr("regulators"), \
	.n_voltages = ((max) - (min)) / (step) + 1, \
	.ops = &pf1550_ldo2_ops, \
	.type = REGULATOR_VOLTAGE, \
	.id = _chip ## _ ## _name, \
	.owner = THIS_MODULE, \
	.min_uV = (min), \
	.uV_step = (step), \
	.linear_min_sel = 0, \
	.vsel_reg = _chip ## _PMIC_REG_ ## _name ## _VOLT, \
	.vsel_mask = (mask), \
	.enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
	.enable_mask = 0x1, \
	}, \
	.stby_enable_reg = _chip ## _PMIC_REG_ ## _name ## _CTRL, \
	.stby_enable_mask = 0x2, \
	}

	static struct pf1550_desc pf1550_regulators[] = {
	PF_SW(PF1550, "sw1", SW1, 600000, 1387500, 0x3f, 12500),
	PF_SW(PF1550, "sw2", SW2, 600000, 1387500, 0x3f, 12500),
	PF_SW(PF1550, "sw3", SW3, 1800000, 3300000, 0xf, 100000),
	PF_VREF(PF1550, "vrefddr", VREFDDR, 1200000),
	PF_LDO1(PF1550, "ldo1", LDO1, 0x1f, pf1550_ldo13_volts),
	PF_LDO2(PF1550, "ldo2", LDO2, 0xf, 1800000, 3300000, 100000),
	PF_LDO1(PF1550, "ldo3", LDO3, 0x1f, pf1550_ldo13_volts),
	};

	static irqreturn_t pf1550_regulator_irq_handler(int irq, void *data)
	{
	struct pf1550_regulator_info *info = data;
	struct device *dev = info->dev;
	struct platform_device *pdev = to_platform_device(dev);
	int i, irq_type = -1;
	unsigned int event;

	for (i = 0; i < PF1550_REGULATOR_IRQ_NR; i++)
	if (irq == platform_get_irq(pdev, i))
	irq_type = i;

	switch (irq_type) {
	/* The _LS interrupts indicate over-current event. The _HS interrupts
	* which are more accurate and can detect catastrophic faults, issue
	* an error event. The current limit FAULT interrupt is similar to the
	* _HS'
	*/
	case PF1550_PMIC_IRQ_SW1_LS:
	case PF1550_PMIC_IRQ_SW2_LS:
	case PF1550_PMIC_IRQ_SW3_LS:
	event = REGULATOR_EVENT_OVER_CURRENT_WARN;
	for (i = 0; i < PF1550_MAX_REGULATOR; i++)
	if (!strcmp(rdev_get_name(info->rdevs[i]), "SW3"))
	regulator_notifier_call_chain(info->rdevs[i],
	event, NULL);
	break;
	case PF1550_PMIC_IRQ_SW1_HS:
	case PF1550_PMIC_IRQ_SW2_HS:
	case PF1550_PMIC_IRQ_SW3_HS:
	event = REGULATOR_EVENT_OVER_CURRENT;
	for (i = 0; i < PF1550_MAX_REGULATOR; i++)
	if (!strcmp(rdev_get_name(info->rdevs[i]), "SW3"))
	regulator_notifier_call_chain(info->rdevs[i],
	event, NULL);
	break;
	case PF1550_PMIC_IRQ_LDO1_FAULT:
	case PF1550_PMIC_IRQ_LDO2_FAULT:
	case PF1550_PMIC_IRQ_LDO3_FAULT:
	event = REGULATOR_EVENT_OVER_CURRENT;
	for (i = 0; i < PF1550_MAX_REGULATOR; i++)
	if (!strcmp(rdev_get_name(info->rdevs[i]), "LDO3"))
	regulator_notifier_call_chain(info->rdevs[i],
	event, NULL);
	break;
	case PF1550_PMIC_IRQ_TEMP_110:
	case PF1550_PMIC_IRQ_TEMP_125:
	event = REGULATOR_EVENT_OVER_TEMP;
	for (i = 0; i < PF1550_MAX_REGULATOR; i++)
	regulator_notifier_call_chain(info->rdevs[i],
	event, NULL);
	break;
	default:
	dev_err(dev, "regulator interrupt: irq %d occurred\n",
	irq_type);
	}

	return IRQ_HANDLED;
	}

	static int pf1550_regulator_probe(struct platform_device *pdev)
	{
	const struct pf1550_ddata *pf1550 = dev_get_drvdata(pdev->dev.parent);
	struct regulator_config config = { };
	struct pf1550_regulator_info *info;
	int i, irq = -1, ret = 0;

	info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
	if (!info)
	return -ENOMEM;

	config.regmap = dev_get_regmap(pf1550->dev, NULL);
	if (!config.regmap)
	return dev_err_probe(&pdev->dev, -ENODEV,
	"failed to get parent regmap\n");

	config.dev = pf1550->dev;
	config.regmap = pf1550->regmap;
	info->dev = &pdev->dev;
	info->pf1550 = pf1550;

	memcpy(info->regulator_descs, pf1550_regulators,
	sizeof(info->regulator_descs));

	for (i = 0; i < ARRAY_SIZE(pf1550_regulators); i++) {
	struct regulator_desc *desc;

	desc = &info->regulator_descs[i].desc;

	if ((desc->id == PF1550_SW2 && !pf1550->dvs2_enable) \|\|
	(desc->id == PF1550_SW1 && !pf1550->dvs1_enable)) {
	/* OTP_SW2_DVS_ENB == 1? or OTP_SW1_DVS_ENB == 1? */
	desc->volt_table = pf1550_sw12_volts;
	desc->n_voltages = ARRAY_SIZE(pf1550_sw12_volts);
	desc->ops = &pf1550_sw1_ops;
	}

	info->rdevs[i] = devm_regulator_register(&pdev->dev, desc,
	&config);
	if (IS_ERR(info->rdevs[i]))
	return dev_err_probe(&pdev->dev,
	PTR_ERR(info->rdevs[i]),
	"failed to initialize regulator-%d\n",
	i);
	}

	platform_set_drvdata(pdev, info);

	for (i = 0; i < PF1550_REGULATOR_IRQ_NR; i++) {
	irq = platform_get_irq(pdev, i);
	if (irq < 0)
	return irq;

	ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
	pf1550_regulator_irq_handler,
	IRQF_NO_SUSPEND,
	"pf1550-regulator", info);
	if (ret)
	return dev_err_probe(&pdev->dev, ret,
	"failed: irq request (IRQ: %d)\n",
	i);
	}

	return 0;
	}

	static const struct platform_device_id pf1550_regulator_id[] = {
	{ "pf1550-regulator", },
	{ /* sentinel */ }
	};
	MODULE_DEVICE_TABLE(platform, pf1550_regulator_id);

	static struct platform_driver pf1550_regulator_driver = {
	.driver = {
	.name = "pf1550-regulator",
	},
	.probe = pf1550_regulator_probe,
	.id_table = pf1550_regulator_id,
	};
	module_platform_driver(pf1550_regulator_driver);

	MODULE_DESCRIPTION("NXP PF1550 regulator driver");
	MODULE_AUTHOR("Robin Gong <yibin.gong@freescale.com>");
	MODULE_LICENSE("GPL");