regulator: pv88090: new regulator driver (c90456e3) · Commits · e / devices / android_kernel_oneplus_sm7250

Documentation/devicetree/bindings/regulator/pv88090.txt

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		* Powerventure Semiconductor PV88090 Voltage Regulator

		Required properties:
		- compatible: "pvs,pv88090".
		- reg: I2C slave address, usually 0x48.
		- interrupts: the interrupt outputs of the controller
		- regulators: A node that houses a sub-node for each regulator within the
		device. Each sub-node is identified using the node's name, with valid
		values listed below. The content of each sub-node is defined by the
		standard binding for regulators; see regulator.txt.
		BUCK1, BUCK2, BUCK3, LDO1, and LDO2.

		Optional properties:
		- Any optional property defined in regulator.txt

		Example

		pmic: pv88090@48 {
		compatible = "pvs,pv88090";
		reg = <0x48>;
		interrupt-parent = <&gpio>;
		interrupts = <24 24>;

		regulators {
		BUCK1 {
		regulator-name = "buck1";
		regulator-min-microvolt = < 600000>;
		regulator-max-microvolt = <1393750>;
		regulator-min-microamp = < 220000>;
		regulator-max-microamp = <7040000>;
		regulator-boot-on;
		};

		BUCK2 {
		regulator-name = "buck2";
		regulator-min-microvolt = < 600000>;
		regulator-max-microvolt = <1393750>;
		regulator-min-microamp = <1496000>;
		regulator-max-microamp = <4189000>;
		};

		BUCK3 {
		regulator-name = "buck3";
		regulator-min-microvolt = <600000>;
		regulator-max-microvolt = <1393750>;
		regulator-min-microamp = <1496000>;
		regulator-max-microamp = <4189000>;
		regulator-boot-on;
		};

		LDO1 {
		regulator-name = "ldo1";
		regulator-min-microvolt = <1200000>;
		regulator-max-microvolt = <4350000>;
		regulator-boot-on;
		};

		LDO2 {
		regulator-name = "ldo2";
		regulator-min-microvolt = < 650000>;
		regulator-max-microvolt = <2225000>;
		regulator-boot-on;
		};
		};
		};

drivers/regulator/Kconfig

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		@@ -512,6 +512,14 @@ config REGULATOR_PV88060
		Say y here to support the voltage regulators and convertors
		PV88060

		config REGULATOR_PV88090
		tristate "Powerventure Semiconductor PV88090 regulator"
		depends on I2C
		select REGMAP_I2C
		help
		Say y here to support the voltage regulators and convertors
		on PV88090

		config REGULATOR_PWM
		tristate "PWM voltage regulator"
		depends on PWM

drivers/regulator/Makefile

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		@@ -67,6 +67,7 @@ obj-$(CONFIG_REGULATOR_QCOM_SPMI) += qcom_spmi-regulator.o
		obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o
		obj-$(CONFIG_REGULATOR_PFUZE100) += pfuze100-regulator.o
		obj-$(CONFIG_REGULATOR_PV88060) += pv88060-regulator.o
		obj-$(CONFIG_REGULATOR_PV88090) += pv88090-regulator.o
		obj-$(CONFIG_REGULATOR_PWM) += pwm-regulator.o
		obj-$(CONFIG_REGULATOR_TPS51632) += tps51632-regulator.o
		obj-$(CONFIG_REGULATOR_PBIAS) += pbias-regulator.o

drivers/regulator/pv88090-regulator.c

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		/*
		* pv88090-regulator.c - Regulator device driver for PV88090
		* Copyright (C) 2015 Powerventure Semiconductor Ltd.
		*
		* This program is free software; you can redistribute it and/or
		* modify it under the terms of the GNU General Public License
		* as published by the Free Software Foundation; either version 2
		* of the License, or (at your option) any later version.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*/

		#include <linux/err.h>
		#include <linux/gpio.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 <linux/proc_fs.h>
		#include <linux/uaccess.h>
		#include "pv88090-regulator.h"

		#define PV88090_MAX_REGULATORS 5

		/* PV88090 REGULATOR IDs */
		enum {
		/* BUCKs */
		PV88090_ID_BUCK1,
		PV88090_ID_BUCK2,
		PV88090_ID_BUCK3,

		/* LDOs */
		PV88090_ID_LDO1,
		PV88090_ID_LDO2,
		};

		struct pv88090_regulator {
		struct regulator_desc desc;
		/* Current limiting */
		unsigned n_current_limits;
		const int *current_limits;
		unsigned int limit_mask;
		unsigned int conf;
		unsigned int conf2;
		};

		struct pv88090 {
		struct device *dev;
		struct regmap *regmap;
		struct regulator_dev *rdev[PV88090_MAX_REGULATORS];
		};

		struct pv88090_buck_voltage {
		int min_uV;
		int max_uV;
		int uV_step;
		};

		static const struct regmap_config pv88090_regmap_config = {
		.reg_bits = 8,
		.val_bits = 8,
		};

		/* Current limits array (in uA) for BUCK1, BUCK2, BUCK3.
		* Entry indexes corresponds to register values.
		*/

		static const int pv88090_buck1_limits[] = {
		220000, 440000, 660000, 880000, 1100000, 1320000, 1540000, 1760000,
		1980000, 2200000, 2420000, 2640000, 2860000, 3080000, 3300000, 3520000,
		3740000, 3960000, 4180000, 4400000, 4620000, 4840000, 5060000, 5280000,
		5500000, 5720000, 5940000, 6160000, 6380000, 6600000, 6820000, 7040000
		};

		static const int pv88090_buck23_limits[] = {
		1496000, 2393000, 3291000, 4189000
		};

		static const struct pv88090_buck_voltage pv88090_buck_vol[3] = {
		{
		.min_uV = 600000,
		.max_uV = 1393750,
		.uV_step = 6250,
		},

		{
		.min_uV = 1400000,
		.max_uV = 2193750,
		.uV_step = 6250,
		},
		{
		.min_uV = 1250000,
		.max_uV = 2837500,
		.uV_step = 12500,
		},
		};

		static unsigned int pv88090_buck_get_mode(struct regulator_dev *rdev)
		{
		struct pv88090_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 & PV88090_BUCK1_MODE_MASK) {
		case PV88090_BUCK_MODE_SYNC:
		mode = REGULATOR_MODE_FAST;
		break;
		case PV88090_BUCK_MODE_AUTO:
		mode = REGULATOR_MODE_NORMAL;
		break;
		case PV88090_BUCK_MODE_SLEEP:
		mode = REGULATOR_MODE_STANDBY;
		break;
		}

		return mode;
		}

		static int pv88090_buck_set_mode(struct regulator_dev *rdev,
		unsigned int mode)
		{
		struct pv88090_regulator *info = rdev_get_drvdata(rdev);
		int val = 0;

		switch (mode) {
		case REGULATOR_MODE_FAST:
		val = PV88090_BUCK_MODE_SYNC;
		break;
		case REGULATOR_MODE_NORMAL:
		val = PV88090_BUCK_MODE_AUTO;
		break;
		case REGULATOR_MODE_STANDBY:
		val = PV88090_BUCK_MODE_SLEEP;
		break;
		default:
		return -EINVAL;
		}

		return regmap_update_bits(rdev->regmap, info->conf,
		PV88090_BUCK1_MODE_MASK, val);
		}

		static int pv88090_set_current_limit(struct regulator_dev *rdev, int min,
		int max)
		{
		struct pv88090_regulator *info = rdev_get_drvdata(rdev);
		int i;

		/* search for closest to maximum */
		for (i = info->n_current_limits; i >= 0; i--) {
		if (min <= info->current_limits[i]
		&& max >= info->current_limits[i]) {
		return regmap_update_bits(rdev->regmap,
		info->conf,
		info->limit_mask,
		i << PV88090_BUCK1_ILIM_SHIFT);
		}
		}

		return -EINVAL;
		}

		static int pv88090_get_current_limit(struct regulator_dev *rdev)
		{
		struct pv88090_regulator *info = rdev_get_drvdata(rdev);
		unsigned int data;
		int ret;

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

		data = (data & info->limit_mask) >> PV88090_BUCK1_ILIM_SHIFT;
		return info->current_limits[data];
		}

		static struct regulator_ops pv88090_buck_ops = {
		.get_mode = pv88090_buck_get_mode,
		.set_mode = pv88090_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 = pv88090_set_current_limit,
		.get_current_limit = pv88090_get_current_limit,
		};

		static struct regulator_ops pv88090_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,
		};

		#define PV88090_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 = &pv88090_buck_ops,\
		.min_uV = min, \
		.uV_step = step, \
		.n_voltages = ((max) - (min))/(step) + 1, \
		.enable_reg = PV88090_REG_##regl_name##_CONF0, \
		.enable_mask = PV88090_##regl_name##_EN, \
		.vsel_reg = PV88090_REG_##regl_name##_CONF0, \
		.vsel_mask = PV88090_V##regl_name##_MASK, \
		},\
		.current_limits = limits_array, \
		.n_current_limits = ARRAY_SIZE(limits_array), \
		.limit_mask = PV88090_##regl_name##_ILIM_MASK, \
		.conf = PV88090_REG_##regl_name##_CONF1, \
		.conf2 = PV88090_REG_##regl_name##_CONF2, \
		}

		#define PV88090_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 = &pv88090_ldo_ops,\
		.min_uV = min, \
		.uV_step = step, \
		.n_voltages = ((max) - (min))/(step) + 1, \
		.enable_reg = PV88090_REG_##regl_name##_CONT, \
		.enable_mask = PV88090_##regl_name##_EN, \
		.vsel_reg = PV88090_REG_##regl_name##_CONT, \
		.vsel_mask = PV88090_V##regl_name##_MASK, \
		},\
		}

		static struct pv88090_regulator pv88090_regulator_info[] = {
		PV88090_BUCK(PV88090, BUCK1, 600000, 6250, 1393750,
		pv88090_buck1_limits),
		PV88090_BUCK(PV88090, BUCK2, 600000, 6250, 1393750,
		pv88090_buck23_limits),
		PV88090_BUCK(PV88090, BUCK3, 600000, 6250, 1393750,
		pv88090_buck23_limits),
		PV88090_LDO(PV88090, LDO1, 1200000, 50000, 4350000),
		PV88090_LDO(PV88090, LDO2, 650000, 25000, 2225000),
		};

		static irqreturn_t pv88090_irq_handler(int irq, void *data)
		{
		struct pv88090 *chip = data;
		int i, reg_val, err, ret = IRQ_NONE;

		err = regmap_read(chip->regmap, PV88090_REG_EVENT_A, &reg_val);
		if (err < 0)
		goto error_i2c;

		if (reg_val & PV88090_E_VDD_FLT) {
		for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
		if (chip->rdev[i] != NULL) {
		regulator_notifier_call_chain(chip->rdev[i],
		REGULATOR_EVENT_UNDER_VOLTAGE,
		NULL);
		}
		}

		err = regmap_update_bits(chip->regmap, PV88090_REG_EVENT_A,
		PV88090_E_VDD_FLT, PV88090_E_VDD_FLT);
		if (err < 0)
		goto error_i2c;

		ret = IRQ_HANDLED;
		}

		if (reg_val & PV88090_E_OVER_TEMP) {
		for (i = 0; i < PV88090_MAX_REGULATORS; i++) {
		if (chip->rdev[i] != NULL) {
		regulator_notifier_call_chain(chip->rdev[i],
		REGULATOR_EVENT_OVER_TEMP,
		NULL);
		}
		}

		err = regmap_update_bits(chip->regmap, PV88090_REG_EVENT_A,
		PV88090_E_OVER_TEMP, PV88090_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 pv88090_i2c_probe(struct i2c_client *i2c,
		const struct i2c_device_id *id)
		{
		struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
		struct pv88090 *chip;
		struct regulator_config config = { };
		int error, i, ret = 0;
		unsigned int conf2, range, index;

		chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88090), GFP_KERNEL);
		if (!chip)
		return -ENOMEM;

		chip->dev = &i2c->dev;
		chip->regmap = devm_regmap_init_i2c(i2c, &pv88090_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, PV88090_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, PV88090_REG_MASK_B, 0xFF);
		if (ret < 0) {
		dev_err(chip->dev,
		"Failed to mask B reg: %d\n", ret);
		return ret;
		}

		ret = request_threaded_irq(i2c->irq, NULL,
		pv88090_irq_handler,
		IRQF_TRIGGER_LOW\|IRQF_ONESHOT,
		"pv88090", chip);
		if (ret != 0) {
		dev_err(chip->dev, "Failed to request IRQ: %d\n",
		i2c->irq);
		return ret;
		}

		ret = regmap_update_bits(chip->regmap, PV88090_REG_MASK_A,
		PV88090_M_VDD_FLT \| PV88090_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 < PV88090_MAX_REGULATORS; i++) {
		if (init_data)
		config.init_data = &init_data[i];

		if (i == PV88090_ID_BUCK2 \|\| i == PV88090_ID_BUCK3) {
		ret = regmap_read(chip->regmap,
		pv88090_regulator_info[i].conf2, &conf2);
		if (ret < 0)
		return ret;

		conf2 = ((conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT)
		&& PV88090_BUCK_VDAC_RANGE_MASK);

		ret = regmap_read(chip->regmap,
		PV88090_REG_BUCK_FOLD_RANGE, &range);
		if (ret < 0)
		return ret;

		range = ((range
		>> (PV88080_BUCK_VRANGE_GAIN_SHIFT + i - 1))
		&& PV88080_BUCK_VRANGE_GAIN_MASK);
		index = ((range << 1) \| conf2);

		pv88090_regulator_info[i].desc.min_uV
		= pv88090_buck_vol[index].min_uV;
		pv88090_regulator_info[i].desc.uV_step
		= pv88090_buck_vol[index].uV_step;
		pv88090_regulator_info[i].desc.n_voltages
		= ((pv88090_buck_vol[index].max_uV)
		- (pv88090_buck_vol[index].min_uV))
		/(pv88090_buck_vol[index].uV_step) + 1;
		}

		config.driver_data = (void *)&pv88090_regulator_info[i];
		chip->rdev[i] = devm_regulator_register(chip->dev,
		&pv88090_regulator_info[i].desc, &config);
		if (IS_ERR(chip->rdev[i])) {
		dev_err(chip->dev,
		"Failed to register PV88090 regulator\n");
		return PTR_ERR(chip->rdev[i]);
		}
		}

		return 0;
		}

		static const struct i2c_device_id pv88090_i2c_id[] = {
		{"pv88090", 0},
		{},
		};
		MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id);

		#ifdef CONFIG_OF
		static const struct of_device_id pv88090_dt_ids[] = {
		{ .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] },
		{},
		};
		MODULE_DEVICE_TABLE(of, pv88090_dt_ids);
		#endif

		static struct i2c_driver pv88090_regulator_driver = {
		.driver = {
		.name = "pv88090",
		.of_match_table = of_match_ptr(pv88090_dt_ids),
		},
		.probe = pv88090_i2c_probe,
		.id_table = pv88090_i2c_id,
		};

		module_i2c_driver(pv88090_regulator_driver);

		MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
		MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090");
		MODULE_LICENSE("GPL");

drivers/regulator/pv88090-regulator.h

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		/*
		* pv88090-regulator.h - Regulator definitions for PV88090
		* Copyright (C) 2015 Powerventure Semiconductor Ltd.
		*
		* This program is free software; you can redistribute it and/or
		* modify it under the terms of the GNU General Public License
		* as published by the Free Software Foundation; either version 2
		* of the License, or (at your option) any later version.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*/

		#ifndef __PV88090_REGISTERS_H__
		#define __PV88090_REGISTERS_H__

		/* System Control and Event Registers */
		#define PV88090_REG_EVENT_A 0x03
		#define PV88090_REG_MASK_A 0x06
		#define PV88090_REG_MASK_B 0x07

		/* Regulator Registers */
		#define PV88090_REG_BUCK1_CONF0 0x18
		#define PV88090_REG_BUCK1_CONF1 0x19
		#define PV88090_REG_BUCK1_CONF2 0x1a
		#define PV88090_REG_BUCK2_CONF0 0x1b
		#define PV88090_REG_BUCK2_CONF1 0x1c
		#define PV88090_REG_BUCK2_CONF2 0x58
		#define PV88090_REG_BUCK3_CONF0 0x1d
		#define PV88090_REG_BUCK3_CONF1 0x1e
		#define PV88090_REG_BUCK3_CONF2 0x5c

		#define PV88090_REG_LDO1_CONT 0x1f
		#define PV88090_REG_LDO2_CONT 0x20
		#define PV88090_REG_LDO3_CONT 0x21
		#define PV88090_REG_BUCK_FOLD_RANGE 0x61

		/* PV88090_REG_EVENT_A (addr=0x03) */
		#define PV88090_E_VDD_FLT 0x01
		#define PV88090_E_OVER_TEMP 0x02

		/* PV88090_REG_MASK_A (addr=0x06) */
		#define PV88090_M_VDD_FLT 0x01
		#define PV88090_M_OVER_TEMP 0x02

		/* PV88090_REG_BUCK1_CONF0 (addr=0x18) */
		#define PV88090_BUCK1_EN 0x80
		#define PV88090_VBUCK1_MASK 0x7F
		/* PV88090_REG_BUCK2_CONF0 (addr=0x1b) */
		#define PV88090_BUCK2_EN 0x80
		#define PV88090_VBUCK2_MASK 0x7F
		/* PV88090_REG_BUCK3_CONF0 (addr=0x1d) */
		#define PV88090_BUCK3_EN 0x80
		#define PV88090_VBUCK3_MASK 0x7F
		/* PV88090_REG_LDO1_CONT (addr=0x1f) */
		#define PV88090_LDO1_EN 0x40
		#define PV88090_VLDO1_MASK 0x3F
		/* PV88090_REG_LDO2_CONT (addr=0x20) */
		#define PV88090_LDO2_EN 0x40
		#define PV88090_VLDO2_MASK 0x3F

		/* PV88090_REG_BUCK1_CONF1 (addr=0x19) */
		#define PV88090_BUCK1_ILIM_SHIFT 2
		#define PV88090_BUCK1_ILIM_MASK 0x7C
		#define PV88090_BUCK1_MODE_MASK 0x03

		/* PV88090_REG_BUCK2_CONF1 (addr=0x1c) */
		#define PV88090_BUCK2_ILIM_SHIFT 2
		#define PV88090_BUCK2_ILIM_MASK 0x0C
		#define PV88090_BUCK2_MODE_MASK 0x03

		/* PV88090_REG_BUCK3_CONF1 (addr=0x1e) */
		#define PV88090_BUCK3_ILIM_SHIFT 2
		#define PV88090_BUCK3_ILIM_MASK 0x0C
		#define PV88090_BUCK3_MODE_MASK 0x03

		#define PV88090_BUCK_MODE_SLEEP 0x00
		#define PV88090_BUCK_MODE_AUTO 0x01
		#define PV88090_BUCK_MODE_SYNC 0x02

		/* PV88090_REG_BUCK2_CONF2 (addr=0x58) */
		/* PV88090_REG_BUCK3_CONF2 (addr=0x5c) */
		#define PV88090_BUCK_VDAC_RANGE_SHIFT 7
		#define PV88090_BUCK_VDAC_RANGE_MASK 0x01

		#define PV88090_BUCK_VDAC_RANGE_1 0x00
		#define PV88090_BUCK_VDAC_RANGE_2 0x01

		/* PV88090_REG_BUCK_FOLD_RANGE (addr=0x61) */
		#define PV88080_BUCK_VRANGE_GAIN_SHIFT 3
		#define PV88080_BUCK_VRANGE_GAIN_MASK 0x01

		#define PV88080_BUCK_VRANGE_GAIN_1 0x00
		#define PV88080_BUCK_VRANGE_GAIN_2 0x01

		#endif /* __PV88090_REGISTERS_H__ */