drivers/regulator/pv88060-regulator.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0+
 //
 // pv88060-regulator.c - Regulator device driver for PV88060
 // Copyright (C) 2015  Powerventure Semiconductor Ltd.

 #include <linux/err.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regmap.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
 #include <linux/regulator/of_regulator.h>
 #include "pv88060-regulator.h"

 #define PV88060_MAX_REGULATORS	14

 /* PV88060 REGULATOR IDs */
 enum {
 	/* BUCKs */
 	PV88060_ID_BUCK1,

 	/* LDOs */
 	PV88060_ID_LDO1,
 	PV88060_ID_LDO2,
 	PV88060_ID_LDO3,
 	PV88060_ID_LDO4,
 	PV88060_ID_LDO5,
 	PV88060_ID_LDO6,
 	PV88060_ID_LDO7,

 	/* SWTs */
 	PV88060_ID_SW1,
 	PV88060_ID_SW2,
 	PV88060_ID_SW3,
 	PV88060_ID_SW4,
 	PV88060_ID_SW5,
 	PV88060_ID_SW6,
 };

 struct pv88060_regulator {
 	struct regulator_desc desc;
 	unsigned int conf;		/* buck configuration register */
 };

 struct pv88060 {
 	struct device *dev;
 	struct regmap *regmap;
 	struct regulator_dev *rdev[PV88060_MAX_REGULATORS];
 };

 static const struct regmap_config pv88060_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,
 };

 /* Current limits array (in uA) for BUCK1
  * Entry indexes corresponds to register values.
  */

 static const unsigned int pv88060_buck1_limits[] = {
 	1496000, 2393000, 3291000, 4189000
 };

 static unsigned int pv88060_buck_get_mode(struct regulator_dev *rdev)
 {
 	struct pv88060_regulator *info = rdev_get_drvdata(rdev);
 	unsigned int data;
 	int ret, mode = 0;

 	ret = regmap_read(rdev->regmap, info->conf, &data);
 	if (ret < 0)
 		return ret;

 	switch (data & PV88060_BUCK_MODE_MASK) {
 	case PV88060_BUCK_MODE_SYNC:
 		mode = REGULATOR_MODE_FAST;
 		break;
 	case PV88060_BUCK_MODE_AUTO:
 		mode = REGULATOR_MODE_NORMAL;
 		break;
 	case PV88060_BUCK_MODE_SLEEP:
 		mode = REGULATOR_MODE_STANDBY;
 		break;
 	}

 	return mode;
 }

 static int pv88060_buck_set_mode(struct regulator_dev *rdev,
 					unsigned int mode)
 {
 	struct pv88060_regulator *info = rdev_get_drvdata(rdev);
 	int val = 0;

 	switch (mode) {
 	case REGULATOR_MODE_FAST:
 		val = PV88060_BUCK_MODE_SYNC;
 		break;
 	case REGULATOR_MODE_NORMAL:
 		val = PV88060_BUCK_MODE_AUTO;
 		break;
 	case REGULATOR_MODE_STANDBY:
 		val = PV88060_BUCK_MODE_SLEEP;
 		break;
 	default:
 		return -EINVAL;
 	}

 	return regmap_update_bits(rdev->regmap, info->conf,
 					PV88060_BUCK_MODE_MASK, val);
 }

 static const struct regulator_ops pv88060_buck_ops = {
 	.get_mode = pv88060_buck_get_mode,
 	.set_mode = pv88060_buck_set_mode,
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 	.list_voltage = regulator_list_voltage_linear,
 	.set_current_limit = regulator_set_current_limit_regmap,
 	.get_current_limit = regulator_get_current_limit_regmap,
 };

 static const struct regulator_ops pv88060_ldo_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 	.list_voltage = regulator_list_voltage_linear,
 };

 static const struct regulator_ops pv88060_sw_ops = {
 	.enable = regulator_enable_regmap,
 	.disable = regulator_disable_regmap,
 	.is_enabled = regulator_is_enabled_regmap,
 };

 #define PV88060_BUCK(chip, regl_name, min, step, max, limits_array) \
 {\
 	.desc	=	{\
 		.id = chip##_ID_##regl_name,\
 		.name = __stringify(chip##_##regl_name),\
 		.of_match = of_match_ptr(#regl_name),\
 		.regulators_node = of_match_ptr("regulators"),\
 		.type = REGULATOR_VOLTAGE,\
 		.owner = THIS_MODULE,\
 		.ops = &pv88060_buck_ops,\
 		.min_uV = min,\
 		.uV_step = step,\
 		.n_voltages = ((max) - (min))/(step) + 1,\
 		.enable_reg = PV88060_REG_##regl_name##_CONF0,\
 		.enable_mask = PV88060_BUCK_EN, \
 		.vsel_reg = PV88060_REG_##regl_name##_CONF0,\
 		.vsel_mask = PV88060_VBUCK_MASK,\
 		.curr_table = limits_array,\
 		.n_current_limits = ARRAY_SIZE(limits_array),\
 		.csel_reg = PV88060_REG_##regl_name##_CONF1,\
 		.csel_mask = PV88060_BUCK_ILIM_MASK,\
 	},\
 	.conf = PV88060_REG_##regl_name##_CONF1,\
 }

 #define PV88060_LDO(chip, regl_name, min, step, max) \
 {\
 	.desc	=	{\
 		.id = chip##_ID_##regl_name,\
 		.name = __stringify(chip##_##regl_name),\
 		.of_match = of_match_ptr(#regl_name),\
 		.regulators_node = of_match_ptr("regulators"),\
 		.type = REGULATOR_VOLTAGE,\
 		.owner = THIS_MODULE,\
 		.ops = &pv88060_ldo_ops,\
 		.min_uV = min, \
 		.uV_step = step, \
 		.n_voltages = (step) ? ((max - min) / step + 1) : 1, \
 		.enable_reg = PV88060_REG_##regl_name##_CONF, \
 		.enable_mask = PV88060_LDO_EN, \
 		.vsel_reg = PV88060_REG_##regl_name##_CONF, \
 		.vsel_mask = PV88060_VLDO_MASK, \
 	},\
 }

 #define PV88060_SW(chip, regl_name, max) \
 {\
 	.desc	=	{\
 		.id = chip##_ID_##regl_name,\
 		.name = __stringify(chip##_##regl_name),\
 		.of_match = of_match_ptr(#regl_name),\
 		.regulators_node = of_match_ptr("regulators"),\
 		.type = REGULATOR_VOLTAGE,\
 		.owner = THIS_MODULE,\
 		.ops = &pv88060_sw_ops,\
 		.fixed_uV = max,\
 		.n_voltages = 1,\
 		.enable_reg = PV88060_REG_##regl_name##_CONF,\
 		.enable_mask = PV88060_SW_EN,\
 	},\
 }

 static const struct pv88060_regulator pv88060_regulator_info[] = {
 	PV88060_BUCK(PV88060, BUCK1, 2800000, 12500, 4387500,
 		pv88060_buck1_limits),
 	PV88060_LDO(PV88060, LDO1, 1200000, 50000, 3350000),
 	PV88060_LDO(PV88060, LDO2, 1200000, 50000, 3350000),
 	PV88060_LDO(PV88060, LDO3, 1200000, 50000, 3350000),
 	PV88060_LDO(PV88060, LDO4, 1200000, 50000, 3350000),
 	PV88060_LDO(PV88060, LDO5, 1200000, 50000, 3350000),
 	PV88060_LDO(PV88060, LDO6, 1200000, 50000, 3350000),
 	PV88060_LDO(PV88060, LDO7, 1200000, 50000, 3350000),
 	PV88060_SW(PV88060, SW1, 5000000),
 	PV88060_SW(PV88060, SW2, 5000000),
 	PV88060_SW(PV88060, SW3, 5000000),
 	PV88060_SW(PV88060, SW4, 5000000),
 	PV88060_SW(PV88060, SW5, 5000000),
 	PV88060_SW(PV88060, SW6, 5000000),
 };

 static irqreturn_t pv88060_irq_handler(int irq, void *data)
 {
 	struct pv88060 *chip = data;
 	int i, reg_val, err, ret = IRQ_NONE;

 	err = regmap_read(chip->regmap, PV88060_REG_EVENT_A, &reg_val);
 	if (err < 0)
 		goto error_i2c;

 	if (reg_val & PV88060_E_VDD_FLT) {
 		for (i = 0; i < PV88060_MAX_REGULATORS; i++) {
 			if (chip->rdev[i] != NULL) {
 				regulator_lock(chip->rdev[i]);
 				regulator_notifier_call_chain(chip->rdev[i],
 					REGULATOR_EVENT_UNDER_VOLTAGE,
 					NULL);
 				regulator_unlock(chip->rdev[i]);
 			}
 		}

 		err = regmap_write(chip->regmap, PV88060_REG_EVENT_A,
 			PV88060_E_VDD_FLT);
 		if (err < 0)
 			goto error_i2c;

 		ret = IRQ_HANDLED;
 	}

 	if (reg_val & PV88060_E_OVER_TEMP) {
 		for (i = 0; i < PV88060_MAX_REGULATORS; i++) {
 			if (chip->rdev[i] != NULL) {
 				regulator_lock(chip->rdev[i]);
 				regulator_notifier_call_chain(chip->rdev[i],
 					REGULATOR_EVENT_OVER_TEMP,
 					NULL);
 				regulator_unlock(chip->rdev[i]);
 			}
 		}

 		err = regmap_write(chip->regmap, PV88060_REG_EVENT_A,
 			PV88060_E_OVER_TEMP);
 		if (err < 0)
 			goto error_i2c;

 		ret = IRQ_HANDLED;
 	}

 	return ret;

 error_i2c:
 	dev_err(chip->dev, "I2C error : %d\n", err);
 	return IRQ_NONE;
 }

 /*
  * I2C driver interface functions
  */
 static int pv88060_i2c_probe(struct i2c_client *i2c)
 {
 	struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
 	struct pv88060 *chip;
 	struct regulator_config config = { };
 	int error, i, ret = 0;

 	chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88060), GFP_KERNEL);
 	if (!chip)
 		return -ENOMEM;

 	chip->dev = &i2c->dev;
 	chip->regmap = devm_regmap_init_i2c(i2c, &pv88060_regmap_config);
 	if (IS_ERR(chip->regmap)) {
 		error = PTR_ERR(chip->regmap);
 		dev_err(chip->dev, "Failed to allocate register map: %d\n",
 			error);
 		return error;
 	}

 	i2c_set_clientdata(i2c, chip);

 	if (i2c->irq != 0) {
 		ret = regmap_write(chip->regmap, PV88060_REG_MASK_A, 0xFF);
 		if (ret < 0) {
 			dev_err(chip->dev,
 				"Failed to mask A reg: %d\n", ret);
 			return ret;
 		}

 		ret = regmap_write(chip->regmap, PV88060_REG_MASK_B, 0xFF);
 		if (ret < 0) {
 			dev_err(chip->dev,
 				"Failed to mask B reg: %d\n", ret);
 			return ret;
 		}

 		ret = regmap_write(chip->regmap, PV88060_REG_MASK_C, 0xFF);
 		if (ret < 0) {
 			dev_err(chip->dev,
 				"Failed to mask C reg: %d\n", ret);
 			return ret;
 		}

 		ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
 					pv88060_irq_handler,
 					IRQF_TRIGGER_LOW|IRQF_ONESHOT,
 					"pv88060", chip);
 		if (ret != 0) {
 			dev_err(chip->dev, "Failed to request IRQ: %d\n",
 				i2c->irq);
 			return ret;
 		}

 		ret = regmap_update_bits(chip->regmap, PV88060_REG_MASK_A,
 			PV88060_M_VDD_FLT | PV88060_M_OVER_TEMP, 0);
 		if (ret < 0) {
 			dev_err(chip->dev,
 				"Failed to update mask reg: %d\n", ret);
 			return ret;
 		}

 	} else {
 		dev_warn(chip->dev, "No IRQ configured\n");
 	}

 	config.dev = chip->dev;
 	config.regmap = chip->regmap;

 	for (i = 0; i < PV88060_MAX_REGULATORS; i++) {
 		if (init_data)
 			config.init_data = &init_data[i];

 		config.driver_data = (void *)&pv88060_regulator_info[i];
 		chip->rdev[i] = devm_regulator_register(chip->dev,
 			&pv88060_regulator_info[i].desc, &config);
 		if (IS_ERR(chip->rdev[i])) {
 			dev_err(chip->dev,
 				"Failed to register PV88060 regulator\n");
 			return PTR_ERR(chip->rdev[i]);
 		}
 	}

 	return 0;
 }

 static const struct i2c_device_id pv88060_i2c_id[] = {
 	{"pv88060", 0},
 	{},
 };
 MODULE_DEVICE_TABLE(i2c, pv88060_i2c_id);

 #ifdef CONFIG_OF
 static const struct of_device_id pv88060_dt_ids[] = {
 	{ .compatible = "pvs,pv88060", .data = &pv88060_i2c_id[0] },
 	{},
 };
 MODULE_DEVICE_TABLE(of, pv88060_dt_ids);
 #endif

 static struct i2c_driver pv88060_regulator_driver = {
 	.driver = {
 		.name = "pv88060",
 		.of_match_table = of_match_ptr(pv88060_dt_ids),
 	},
 	.probe_new = pv88060_i2c_probe,
 	.id_table = pv88060_i2c_id,
 };

 module_i2c_driver(pv88060_regulator_driver);

 MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
 MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88060");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0+
	//
	// pv88060-regulator.c - Regulator device driver for PV88060
	// Copyright (C) 2015 Powerventure Semiconductor Ltd.

	#include <linux/err.h>
	#include <linux/i2c.h>
	#include <linux/module.h>
	#include <linux/init.h>
	#include <linux/slab.h>
	#include <linux/regulator/driver.h>
	#include <linux/regulator/machine.h>
	#include <linux/regmap.h>
	#include <linux/irq.h>
	#include <linux/interrupt.h>
	#include <linux/regulator/of_regulator.h>
	#include "pv88060-regulator.h"

	#define PV88060_MAX_REGULATORS 14

	/* PV88060 REGULATOR IDs */
	enum {
	/* BUCKs */
	PV88060_ID_BUCK1,

	/* LDOs */
	PV88060_ID_LDO1,
	PV88060_ID_LDO2,
	PV88060_ID_LDO3,
	PV88060_ID_LDO4,
	PV88060_ID_LDO5,
	PV88060_ID_LDO6,
	PV88060_ID_LDO7,

	/* SWTs */
	PV88060_ID_SW1,
	PV88060_ID_SW2,
	PV88060_ID_SW3,
	PV88060_ID_SW4,
	PV88060_ID_SW5,
	PV88060_ID_SW6,
	};

	struct pv88060_regulator {
	struct regulator_desc desc;
	unsigned int conf; /* buck configuration register */
	};

	struct pv88060 {
	struct device *dev;
	struct regmap *regmap;
	struct regulator_dev *rdev[PV88060_MAX_REGULATORS];
	};

	static const struct regmap_config pv88060_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	};

	/* Current limits array (in uA) for BUCK1
	* Entry indexes corresponds to register values.
	*/

	static const unsigned int pv88060_buck1_limits[] = {
	1496000, 2393000, 3291000, 4189000
	};

	static unsigned int pv88060_buck_get_mode(struct regulator_dev *rdev)
	{
	struct pv88060_regulator *info = rdev_get_drvdata(rdev);
	unsigned int data;
	int ret, mode = 0;

	ret = regmap_read(rdev->regmap, info->conf, &data);
	if (ret < 0)
	return ret;

	switch (data & PV88060_BUCK_MODE_MASK) {
	case PV88060_BUCK_MODE_SYNC:
	mode = REGULATOR_MODE_FAST;
	break;
	case PV88060_BUCK_MODE_AUTO:
	mode = REGULATOR_MODE_NORMAL;
	break;
	case PV88060_BUCK_MODE_SLEEP:
	mode = REGULATOR_MODE_STANDBY;
	break;
	}

	return mode;
	}

	static int pv88060_buck_set_mode(struct regulator_dev *rdev,
	unsigned int mode)
	{
	struct pv88060_regulator *info = rdev_get_drvdata(rdev);
	int val = 0;

	switch (mode) {
	case REGULATOR_MODE_FAST:
	val = PV88060_BUCK_MODE_SYNC;
	break;
	case REGULATOR_MODE_NORMAL:
	val = PV88060_BUCK_MODE_AUTO;
	break;
	case REGULATOR_MODE_STANDBY:
	val = PV88060_BUCK_MODE_SLEEP;
	break;
	default:
	return -EINVAL;
	}

	return regmap_update_bits(rdev->regmap, info->conf,
	PV88060_BUCK_MODE_MASK, val);
	}

	static const struct regulator_ops pv88060_buck_ops = {
	.get_mode = pv88060_buck_get_mode,
	.set_mode = pv88060_buck_set_mode,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.list_voltage = regulator_list_voltage_linear,
	.set_current_limit = regulator_set_current_limit_regmap,
	.get_current_limit = regulator_get_current_limit_regmap,
	};

	static const struct regulator_ops pv88060_ldo_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.list_voltage = regulator_list_voltage_linear,
	};

	static const struct regulator_ops pv88060_sw_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	};

	#define PV88060_BUCK(chip, regl_name, min, step, max, limits_array) \
	{\
	.desc = {\
	.id = chip##_ID_##regl_name,\
	.name = __stringify(chip##_##regl_name),\
	.of_match = of_match_ptr(#regl_name),\
	.regulators_node = of_match_ptr("regulators"),\
	.type = REGULATOR_VOLTAGE,\
	.owner = THIS_MODULE,\
	.ops = &pv88060_buck_ops,\
	.min_uV = min,\
	.uV_step = step,\
	.n_voltages = ((max) - (min))/(step) + 1,\
	.enable_reg = PV88060_REG_##regl_name##_CONF0,\
	.enable_mask = PV88060_BUCK_EN, \
	.vsel_reg = PV88060_REG_##regl_name##_CONF0,\
	.vsel_mask = PV88060_VBUCK_MASK,\
	.curr_table = limits_array,\
	.n_current_limits = ARRAY_SIZE(limits_array),\
	.csel_reg = PV88060_REG_##regl_name##_CONF1,\
	.csel_mask = PV88060_BUCK_ILIM_MASK,\
	},\
	.conf = PV88060_REG_##regl_name##_CONF1,\
	}

	#define PV88060_LDO(chip, regl_name, min, step, max) \
	{\
	.desc = {\
	.id = chip##_ID_##regl_name,\
	.name = __stringify(chip##_##regl_name),\
	.of_match = of_match_ptr(#regl_name),\
	.regulators_node = of_match_ptr("regulators"),\
	.type = REGULATOR_VOLTAGE,\
	.owner = THIS_MODULE,\
	.ops = &pv88060_ldo_ops,\
	.min_uV = min, \
	.uV_step = step, \
	.n_voltages = (step) ? ((max - min) / step + 1) : 1, \
	.enable_reg = PV88060_REG_##regl_name##_CONF, \
	.enable_mask = PV88060_LDO_EN, \
	.vsel_reg = PV88060_REG_##regl_name##_CONF, \
	.vsel_mask = PV88060_VLDO_MASK, \
	},\
	}

	#define PV88060_SW(chip, regl_name, max) \
	{\
	.desc = {\
	.id = chip##_ID_##regl_name,\
	.name = __stringify(chip##_##regl_name),\
	.of_match = of_match_ptr(#regl_name),\
	.regulators_node = of_match_ptr("regulators"),\
	.type = REGULATOR_VOLTAGE,\
	.owner = THIS_MODULE,\
	.ops = &pv88060_sw_ops,\
	.fixed_uV = max,\
	.n_voltages = 1,\
	.enable_reg = PV88060_REG_##regl_name##_CONF,\
	.enable_mask = PV88060_SW_EN,\
	},\
	}

	static const struct pv88060_regulator pv88060_regulator_info[] = {
	PV88060_BUCK(PV88060, BUCK1, 2800000, 12500, 4387500,
	pv88060_buck1_limits),
	PV88060_LDO(PV88060, LDO1, 1200000, 50000, 3350000),
	PV88060_LDO(PV88060, LDO2, 1200000, 50000, 3350000),
	PV88060_LDO(PV88060, LDO3, 1200000, 50000, 3350000),
	PV88060_LDO(PV88060, LDO4, 1200000, 50000, 3350000),
	PV88060_LDO(PV88060, LDO5, 1200000, 50000, 3350000),
	PV88060_LDO(PV88060, LDO6, 1200000, 50000, 3350000),
	PV88060_LDO(PV88060, LDO7, 1200000, 50000, 3350000),
	PV88060_SW(PV88060, SW1, 5000000),
	PV88060_SW(PV88060, SW2, 5000000),
	PV88060_SW(PV88060, SW3, 5000000),
	PV88060_SW(PV88060, SW4, 5000000),
	PV88060_SW(PV88060, SW5, 5000000),
	PV88060_SW(PV88060, SW6, 5000000),
	};

	static irqreturn_t pv88060_irq_handler(int irq, void *data)
	{
	struct pv88060 *chip = data;
	int i, reg_val, err, ret = IRQ_NONE;

	err = regmap_read(chip->regmap, PV88060_REG_EVENT_A, &reg_val);
	if (err < 0)
	goto error_i2c;

	if (reg_val & PV88060_E_VDD_FLT) {
	for (i = 0; i < PV88060_MAX_REGULATORS; i++) {
	if (chip->rdev[i] != NULL) {
	regulator_lock(chip->rdev[i]);
	regulator_notifier_call_chain(chip->rdev[i],
	REGULATOR_EVENT_UNDER_VOLTAGE,
	NULL);
	regulator_unlock(chip->rdev[i]);
	}
	}

	err = regmap_write(chip->regmap, PV88060_REG_EVENT_A,
	PV88060_E_VDD_FLT);
	if (err < 0)
	goto error_i2c;

	ret = IRQ_HANDLED;
	}

	if (reg_val & PV88060_E_OVER_TEMP) {
	for (i = 0; i < PV88060_MAX_REGULATORS; i++) {
	if (chip->rdev[i] != NULL) {
	regulator_lock(chip->rdev[i]);
	regulator_notifier_call_chain(chip->rdev[i],
	REGULATOR_EVENT_OVER_TEMP,
	NULL);
	regulator_unlock(chip->rdev[i]);
	}
	}

	err = regmap_write(chip->regmap, PV88060_REG_EVENT_A,
	PV88060_E_OVER_TEMP);
	if (err < 0)
	goto error_i2c;

	ret = IRQ_HANDLED;
	}

	return ret;

	error_i2c:
	dev_err(chip->dev, "I2C error : %d\n", err);
	return IRQ_NONE;
	}

	/*
	* I2C driver interface functions
	*/
	static int pv88060_i2c_probe(struct i2c_client *i2c)
	{
	struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
	struct pv88060 *chip;
	struct regulator_config config = { };
	int error, i, ret = 0;

	chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88060), GFP_KERNEL);
	if (!chip)
	return -ENOMEM;

	chip->dev = &i2c->dev;
	chip->regmap = devm_regmap_init_i2c(i2c, &pv88060_regmap_config);
	if (IS_ERR(chip->regmap)) {
	error = PTR_ERR(chip->regmap);
	dev_err(chip->dev, "Failed to allocate register map: %d\n",
	error);
	return error;
	}

	i2c_set_clientdata(i2c, chip);

	if (i2c->irq != 0) {
	ret = regmap_write(chip->regmap, PV88060_REG_MASK_A, 0xFF);
	if (ret < 0) {
	dev_err(chip->dev,
	"Failed to mask A reg: %d\n", ret);
	return ret;
	}

	ret = regmap_write(chip->regmap, PV88060_REG_MASK_B, 0xFF);
	if (ret < 0) {
	dev_err(chip->dev,
	"Failed to mask B reg: %d\n", ret);
	return ret;
	}

	ret = regmap_write(chip->regmap, PV88060_REG_MASK_C, 0xFF);
	if (ret < 0) {
	dev_err(chip->dev,
	"Failed to mask C reg: %d\n", ret);
	return ret;
	}

	ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
	pv88060_irq_handler,
	IRQF_TRIGGER_LOW\|IRQF_ONESHOT,
	"pv88060", chip);
	if (ret != 0) {
	dev_err(chip->dev, "Failed to request IRQ: %d\n",
	i2c->irq);
	return ret;
	}

	ret = regmap_update_bits(chip->regmap, PV88060_REG_MASK_A,
	PV88060_M_VDD_FLT \| PV88060_M_OVER_TEMP, 0);
	if (ret < 0) {
	dev_err(chip->dev,
	"Failed to update mask reg: %d\n", ret);
	return ret;
	}

	} else {
	dev_warn(chip->dev, "No IRQ configured\n");
	}

	config.dev = chip->dev;
	config.regmap = chip->regmap;

	for (i = 0; i < PV88060_MAX_REGULATORS; i++) {
	if (init_data)
	config.init_data = &init_data[i];

	config.driver_data = (void *)&pv88060_regulator_info[i];
	chip->rdev[i] = devm_regulator_register(chip->dev,
	&pv88060_regulator_info[i].desc, &config);
	if (IS_ERR(chip->rdev[i])) {
	dev_err(chip->dev,
	"Failed to register PV88060 regulator\n");
	return PTR_ERR(chip->rdev[i]);
	}
	}

	return 0;
	}

	static const struct i2c_device_id pv88060_i2c_id[] = {
	{"pv88060", 0},
	{},
	};
	MODULE_DEVICE_TABLE(i2c, pv88060_i2c_id);

	#ifdef CONFIG_OF
	static const struct of_device_id pv88060_dt_ids[] = {
	{ .compatible = "pvs,pv88060", .data = &pv88060_i2c_id[0] },
	{},
	};
	MODULE_DEVICE_TABLE(of, pv88060_dt_ids);
	#endif

	static struct i2c_driver pv88060_regulator_driver = {
	.driver = {
	.name = "pv88060",
	.of_match_table = of_match_ptr(pv88060_dt_ids),
	},
	.probe_new = pv88060_i2c_probe,
	.id_table = pv88060_i2c_id,
	};

	module_i2c_driver(pv88060_regulator_driver);

	MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
	MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88060");
	MODULE_LICENSE("GPL");