Merge remote-tracking branches 'regulator/topic/max77686',...

Merge remote-tracking branches 'regulator/topic/max77686', 'regulator/topic/max8973', 'regulator/topic/maxim', 'regulator/topic/palmas' and 'regulator/topic/pv88080' into regulator-next

Documentation/devicetree/bindings/regulator/max8973-regulator.txt

@@ -32,6 +32,13 @@ Optional properties:
 
 Enhanced transient response (ETR) will affect the configuration of CKADV.
 
+-junction-warn-millicelsius: u32, junction warning temperature threshold
+		in millicelsius. If die temperature crosses this level then
+		device generates the warning interrupts.
+
+Please note that thermal functionality is only supported on MAX77621. The
+supported threshold warning temperature for MAX77621 are 120 degC and 140 degC.
+
 Example:
 
 	max8973@1b {

Documentation/devicetree/bindings/regulator/pv88080.txt

+* Powerventure Semiconductor PV88080 Voltage Regulator
+
+Required properties:
+- compatible: "pvs,pv88080".
+- reg: I2C slave address, usually 0x49.
+- 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, and BUCK3.
+
+Optional properties:
+- Any optional property defined in regulator.txt
+
+Example
+
+	pmic: pv88080@49 {
+		compatible = "pvs,pv88080";
+		reg = <0x49>;
+		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>;
+			};
+
+			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 = <1400000>;
+				regulator-max-microvolt = <2193750>;
+				regulator-min-microamp 	= <1496000>;
+				regulator-max-microamp 	= <4189000>;
+			};
+		};
+	};

MAINTAINERS

@@ -7020,9 +7020,9 @@ M:	Chanwoo Choi <cw00.choi@samsung.com>
 M:	Krzysztof Kozlowski <k.kozlowski@samsung.com>
 L:	linux-kernel@vger.kernel.org
 S:	Supported
-F:	drivers/*/max14577.c
+F:	drivers/*/max14577*.c
 F:	drivers/*/max77686*.c
-F:	drivers/*/max77693.c
+F:	drivers/*/max77693*.c
 F:	drivers/extcon/extcon-max14577.c
 F:	drivers/extcon/extcon-max77693.c
 F:	drivers/rtc/rtc-max77686.c

drivers/regulator/Kconfig

@@ -418,6 +418,7 @@ config REGULATOR_MAX8952
 config REGULATOR_MAX8973
 	tristate "Maxim MAX8973 voltage regulator "
 	depends on I2C
+	depends on THERMAL && THERMAL_OF
 	select REGMAP_I2C
 	help
 	  The MAXIM MAX8973 high-efficiency. three phase, DC-DC step-down
@@ -557,6 +558,13 @@ config REGULATOR_PV88060
 	  Say y here to support the voltage regulators and convertors
 	  PV88060
 
+config REGULATOR_PV88080
+	tristate "Powerventure Semiconductor PV88080 regulator"
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  Say y here to support the buck convertors on PV88080
+
 config REGULATOR_PV88090
 	tristate "Powerventure Semiconductor PV88090 regulator"
 	depends on I2C

drivers/regulator/Makefile

@@ -47,7 +47,7 @@ obj-$(CONFIG_REGULATOR_LP8788) += lp8788-buck.o
 obj-$(CONFIG_REGULATOR_LP8788) += lp8788-ldo.o
 obj-$(CONFIG_REGULATOR_LP8755) += lp8755.o
 obj-$(CONFIG_REGULATOR_LTC3589) += ltc3589.o
-obj-$(CONFIG_REGULATOR_MAX14577) += max14577.o
+obj-$(CONFIG_REGULATOR_MAX14577) += max14577-regulator.o
 obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o
 obj-$(CONFIG_REGULATOR_MAX77620) += max77620-regulator.o
 obj-$(CONFIG_REGULATOR_MAX8649)	+= max8649.o
@@ -56,10 +56,10 @@ obj-$(CONFIG_REGULATOR_MAX8907) += max8907-regulator.o
 obj-$(CONFIG_REGULATOR_MAX8925) += max8925-regulator.o
 obj-$(CONFIG_REGULATOR_MAX8952) += max8952.o
 obj-$(CONFIG_REGULATOR_MAX8973) += max8973-regulator.o
-obj-$(CONFIG_REGULATOR_MAX8997) += max8997.o
+obj-$(CONFIG_REGULATOR_MAX8997) += max8997-regulator.o
 obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o
 obj-$(CONFIG_REGULATOR_MAX77686) += max77686-regulator.o
-obj-$(CONFIG_REGULATOR_MAX77693) += max77693.o
+obj-$(CONFIG_REGULATOR_MAX77693) += max77693-regulator.o
 obj-$(CONFIG_REGULATOR_MAX77802) += max77802-regulator.o
 obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o
 obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o
@@ -72,6 +72,7 @@ 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-$(CONFIG_REGULATOR_PV88080) += pv88080-regulator.o
 obj-$(CONFIG_REGULATOR_PV88090) += pv88090-regulator.o
 obj-$(CONFIG_REGULATOR_PWM) += pwm-regulator.o
 obj-$(CONFIG_REGULATOR_TPS51632) += tps51632-regulator.o

drivers/regulator/max77686-regulator.c

@@ -41,6 +41,8 @@
 #define MAX77686_LDO_LOW_UVSTEP	25000
 #define MAX77686_BUCK_MINUV	750000
 #define MAX77686_BUCK_UVSTEP	50000
+#define MAX77686_BUCK_ENABLE_TIME	40		/* us */
+#define MAX77686_DVS_ENABLE_TIME	22		/* us */
 #define MAX77686_RAMP_DELAY	100000			/* uV/us */
 #define MAX77686_DVS_RAMP_DELAY	27500			/* uV/us */
 #define MAX77686_DVS_MINUV	600000
@@ -422,6 +424,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 	.min_uV		= MAX77686_BUCK_MINUV,				\
 	.uV_step	= MAX77686_BUCK_UVSTEP,				\
 	.ramp_delay	= MAX77686_RAMP_DELAY,				\
+	.enable_time	= MAX77686_BUCK_ENABLE_TIME,			\
 	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
 	.vsel_reg	= MAX77686_REG_BUCK5OUT + (num - 5) * 2,	\
 	.vsel_mask	= MAX77686_VSEL_MASK,				\
@@ -439,6 +442,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 	.min_uV		= MAX77686_BUCK_MINUV,				\
 	.uV_step	= MAX77686_BUCK_UVSTEP,				\
 	.ramp_delay	= MAX77686_RAMP_DELAY,				\
+	.enable_time	= MAX77686_BUCK_ENABLE_TIME,			\
 	.n_voltages	= MAX77686_VSEL_MASK + 1,			\
 	.vsel_reg	= MAX77686_REG_BUCK1OUT,			\
 	.vsel_mask	= MAX77686_VSEL_MASK,				\
@@ -456,6 +460,7 @@ static struct regulator_ops max77686_buck_dvs_ops = {
 	.min_uV		= MAX77686_DVS_MINUV,				\
 	.uV_step	= MAX77686_DVS_UVSTEP,				\
 	.ramp_delay	= MAX77686_DVS_RAMP_DELAY,			\
+	.enable_time	= MAX77686_DVS_ENABLE_TIME,			\
 	.n_voltages	= MAX77686_DVS_VSEL_MASK + 1,			\
 	.vsel_reg	= MAX77686_REG_BUCK2DVS1 + (num - 2) * 10,	\
 	.vsel_mask	= MAX77686_DVS_VSEL_MASK,			\
@@ -553,17 +558,7 @@ static struct platform_driver max77686_pmic_driver = {
 	.id_table = max77686_pmic_id,
 };
 
-static int __init max77686_pmic_init(void)
-{
-	return platform_driver_register(&max77686_pmic_driver);
-}
-subsys_initcall(max77686_pmic_init);
-
-static void __exit max77686_pmic_cleanup(void)
-{
-	platform_driver_unregister(&max77686_pmic_driver);
-}
-module_exit(max77686_pmic_cleanup);
+module_platform_driver(max77686_pmic_driver);
 
 MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver");
 MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");

drivers/regulator/max77802-regulator.c

@@ -5,7 +5,7 @@
  * Simon Glass <sjg@chromium.org>
  *
  * Copyright (C) 2012 Samsung Electronics
- * Chiwoong Byun <woong.byun@smasung.com>
+ * Chiwoong Byun <woong.byun@samsung.com>
  * Jonghwa Lee <jonghwa3.lee@samsung.com>
  *
  * This program is free software; you can redistribute it and/or modify

drivers/regulator/max8973-regulator.c

@@ -38,6 +38,9 @@
 #include <linux/i2c.h>
 #include <linux/slab.h>
 #include <linux/regmap.h>
+#include <linux/thermal.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
 
 /* Register definitions */
 #define MAX8973_VOUT					0x0
@@ -74,6 +77,7 @@
 #define MAX8973_WDTMR_ENABLE				BIT(6)
 #define MAX8973_DISCH_ENBABLE				BIT(5)
 #define MAX8973_FT_ENABLE				BIT(4)
+#define MAX77621_T_JUNCTION_120				BIT(7)
 
 #define MAX8973_CKKADV_TRIP_MASK			0xC
 #define MAX8973_CKKADV_TRIP_DISABLE			0xC
@@ -93,6 +97,12 @@
 #define MAX8973_VOLATGE_STEP				6250
 #define MAX8973_BUCK_N_VOLTAGE				0x80
 
+#define MAX77621_CHIPID_TJINT_S				BIT(0)
+
+#define MAX77621_NORMAL_OPERATING_TEMP			100000
+#define MAX77621_TJINT_WARNING_TEMP_120			120000
+#define MAX77621_TJINT_WARNING_TEMP_140			140000
+
 enum device_id {
 	MAX8973,
 	MAX77621
@@ -112,6 +122,9 @@ struct max8973_chip {
 	int curr_gpio_val;
 	struct regulator_ops ops;
 	enum device_id id;
+	int junction_temp_warning;
+	int irq;
+	struct thermal_zone_device *tz_device;
 };
 
 /*
@@ -391,6 +404,10 @@ static int max8973_init_dcdc(struct max8973_chip *max,
 	if (pdata->control_flags & MAX8973_CONTROL_FREQ_SHIFT_9PER_ENABLE)
 		control1 |= MAX8973_FREQSHIFT_9PER;
 
+	if ((pdata->junction_temp_warning == MAX77621_TJINT_WARNING_TEMP_120) &&
+	    (max->id == MAX77621))
+		control2 |= MAX77621_T_JUNCTION_120;
+
 	if (!(pdata->control_flags & MAX8973_CONTROL_PULL_DOWN_ENABLE))
 		control2 |= MAX8973_DISCH_ENBABLE;
 
@@ -457,6 +474,79 @@ static int max8973_init_dcdc(struct max8973_chip *max,
 	return ret;
 }
 
+static int max8973_thermal_read_temp(void *data, int *temp)
+{
+	struct max8973_chip *mchip = data;
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(mchip->regmap, MAX8973_CHIPID1, &val);
+	if (ret < 0) {
+		dev_err(mchip->dev, "Failed to read register CHIPID1, %d", ret);
+		return ret;
+	}
+
+	/* +1 degC to trigger cool devive */
+	if (val & MAX77621_CHIPID_TJINT_S)
+		*temp = mchip->junction_temp_warning + 1000;
+	else
+		*temp = MAX77621_NORMAL_OPERATING_TEMP;
+
+	return 0;
+}
+
+static irqreturn_t max8973_thermal_irq(int irq, void *data)
+{
+	struct max8973_chip *mchip = data;
+
+	thermal_zone_device_update(mchip->tz_device);
+
+	return IRQ_HANDLED;
+}
+
+static const struct thermal_zone_of_device_ops max77621_tz_ops = {
+	.get_temp = max8973_thermal_read_temp,
+};
+
+static int max8973_thermal_init(struct max8973_chip *mchip)
+{
+	struct thermal_zone_device *tzd;
+	struct irq_data *irq_data;
+	unsigned long irq_flags = 0;
+	int ret;
+
+	if (mchip->id != MAX77621)
+		return 0;
+
+	tzd = devm_thermal_zone_of_sensor_register(mchip->dev, 0, mchip,
+						   &max77621_tz_ops);
+	if (IS_ERR(tzd)) {
+		ret = PTR_ERR(tzd);
+		dev_err(mchip->dev, "Failed to register thermal sensor: %d\n",
+			ret);
+		return ret;
+	}
+
+	if (mchip->irq <= 0)
+		return 0;
+
+	irq_data = irq_get_irq_data(mchip->irq);
+	if (irq_data)
+		irq_flags = irqd_get_trigger_type(irq_data);
+
+	ret = devm_request_threaded_irq(mchip->dev, mchip->irq, NULL,
+					max8973_thermal_irq,
+					IRQF_ONESHOT | IRQF_SHARED | irq_flags,
+					dev_name(mchip->dev), mchip);
+	if (ret < 0) {
+		dev_err(mchip->dev, "Failed to request irq %d, %d\n",
+			mchip->irq, ret);
+		return ret;
+	}
+
+	return 0;
+}
+
 static const struct regmap_config max8973_regmap_config = {
 	.reg_bits		= 8,
 	.val_bits		= 8,
@@ -521,6 +611,11 @@ static struct max8973_regulator_platform_data *max8973_parse_dt(
 		pdata->control_flags |= MAX8973_CONTROL_CLKADV_TRIP_DISABLED;
 	}
 
+	pdata->junction_temp_warning = MAX77621_TJINT_WARNING_TEMP_140;
+	ret = of_property_read_u32(np, "junction-warn-millicelsius", &pval);
+	if (!ret && (pval <= MAX77621_TJINT_WARNING_TEMP_120))
+		pdata->junction_temp_warning = MAX77621_TJINT_WARNING_TEMP_120;
+
 	return pdata;
 }
 
@@ -608,6 +703,7 @@ static int max8973_probe(struct i2c_client *client,
 	max->enable_external_control = pdata->enable_ext_control;
 	max->curr_gpio_val = pdata->dvs_def_state;
 	max->curr_vout_reg = MAX8973_VOUT + pdata->dvs_def_state;
+	max->junction_temp_warning = pdata->junction_temp_warning;
 
 	if (gpio_is_valid(max->enable_gpio))
 		max->enable_external_control = true;
@@ -718,6 +814,7 @@ static int max8973_probe(struct i2c_client *client,
 		return ret;
 	}
 
+	max8973_thermal_init(max);
 	return 0;
 }
 

drivers/regulator/max8997.c → drivers/regulator/max8997-regulator.c

@@ -2,7 +2,7 @@
  * max8997.c - Regulator driver for the Maxim 8997/8966
  *
  * Copyright (C) 2011 Samsung Electronics
- * MyungJoo Ham <myungjoo.ham@smasung.com>
+ * MyungJoo Ham <myungjoo.ham@samsung.com>
  *
  * 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

drivers/regulator/palmas-regulator.c

@@ -944,6 +944,8 @@ static int palmas_ldo_registration(struct palmas_pmic *pmic,
 			if (id == PALMAS_REG_LDO9) {
 				desc->ops = &palmas_ops_ldo9;
 				desc->bypass_reg = desc->enable_reg;
+				desc->bypass_val_on =
+						PALMAS_LDO9_CTRL_LDO_BYPASS_EN;
 				desc->bypass_mask =
 						PALMAS_LDO9_CTRL_LDO_BYPASS_EN;
 			}
@@ -1055,6 +1057,8 @@ static int tps65917_ldo_registration(struct palmas_pmic *pmic,
 			    id == TPS65917_REG_LDO2) {
 				desc->ops = &tps65917_ops_ldo_1_2;
 				desc->bypass_reg = desc->enable_reg;
+				desc->bypass_val_on =
+						TPS65917_LDO1_CTRL_BYPASS_EN;
 				desc->bypass_mask =
 						TPS65917_LDO1_CTRL_BYPASS_EN;
 			}
@@ -1206,6 +1210,7 @@ static int palmas_smps_registration(struct palmas_pmic *pmic,
 				desc->enable_mask = SMPS10_BOOST_EN;
 			desc->bypass_reg = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE,
 							    PALMAS_SMPS10_CTRL);
+			desc->bypass_val_on = SMPS10_BYPASS_EN;
 			desc->bypass_mask = SMPS10_BYPASS_EN;
 			desc->min_uV = 3750000;
 			desc->uV_step = 1250000;
@@ -1462,7 +1467,7 @@ static struct palmas_pmic_driver_data tps65917_ddata = {
 	.ldo_register = tps65917_ldo_registration,
 };
 
-static void palmas_dt_to_pdata(struct device *dev,
+static int palmas_dt_to_pdata(struct device *dev,
 			      struct device_node *node,
 			      struct palmas_pmic_platform_data *pdata,
 			      struct palmas_pmic_driver_data *ddata)
@@ -1474,7 +1479,7 @@ static void palmas_dt_to_pdata(struct device *dev,
 	regulators = of_get_child_by_name(node, "regulators");
 	if (!regulators) {
 		dev_info(dev, "regulator node not found\n");
-		return;
+		return 0;
 	}
 
 	ret = of_regulator_match(dev, regulators, ddata->palmas_matches,
@@ -1482,25 +1487,29 @@ static void palmas_dt_to_pdata(struct device *dev,
 	of_node_put(regulators);
 	if (ret < 0) {
 		dev_err(dev, "Error parsing regulator init data: %d\n", ret);
-		return;
+		return 0;
 	}
 
 	for (idx = 0; idx < ddata->max_reg; idx++) {
-		if (!ddata->palmas_matches[idx].init_data ||
-		    !ddata->palmas_matches[idx].of_node)
-			continue;
+		static struct of_regulator_match *match;
+		struct palmas_reg_init *rinit;
+		struct device_node *np;
 
-		pdata->reg_data[idx] = ddata->palmas_matches[idx].init_data;
+		match = &ddata->palmas_matches[idx];
+		np = match->of_node;
 
-		pdata->reg_init[idx] = devm_kzalloc(dev,
-				sizeof(struct palmas_reg_init), GFP_KERNEL);
+		if (!match->init_data || !np)
+			continue;
+
+		rinit = devm_kzalloc(dev, sizeof(*rinit), GFP_KERNEL);
+		if (!rinit)
+			return -ENOMEM;
 
-		pdata->reg_init[idx]->warm_reset =
-			of_property_read_bool(ddata->palmas_matches[idx].of_node,
-					      "ti,warm-reset");
+		pdata->reg_data[idx] = match->init_data;
+		pdata->reg_init[idx] = rinit;
 
-		ret = of_property_read_u32(ddata->palmas_matches[idx].of_node,
-					   "ti,roof-floor", &prop);
+		rinit->warm_reset = of_property_read_bool(np, "ti,warm-reset");
+		ret = of_property_read_u32(np, "ti,roof-floor", &prop);
 		/* EINVAL: Property not found */
 		if (ret != -EINVAL) {
 			int econtrol;
@@ -1522,31 +1531,29 @@ static void palmas_dt_to_pdata(struct device *dev,
 					WARN_ON(1);
 					dev_warn(dev,
 						 "%s: Invalid roof-floor option: %u\n",
-					     palmas_matches[idx].name, prop);
+						 match->name, prop);
 					break;
 				}
 			}
-			pdata->reg_init[idx]->roof_floor = econtrol;
+			rinit->roof_floor = econtrol;
 		}
 
-		ret = of_property_read_u32(ddata->palmas_matches[idx].of_node,
-					   "ti,mode-sleep", &prop);
+		ret = of_property_read_u32(np, "ti,mode-sleep", &prop);
 		if (!ret)
-			pdata->reg_init[idx]->mode_sleep = prop;
+			rinit->mode_sleep = prop;
 
-		ret = of_property_read_bool(ddata->palmas_matches[idx].of_node,
-					    "ti,smps-range");
+		ret = of_property_read_bool(np, "ti,smps-range");
 		if (ret)
-			pdata->reg_init[idx]->vsel =
-				PALMAS_SMPS12_VOLTAGE_RANGE;
+			rinit->vsel = PALMAS_SMPS12_VOLTAGE_RANGE;
 
 		if (idx == PALMAS_REG_LDO8)
 			pdata->enable_ldo8_tracking = of_property_read_bool(
-						ddata->palmas_matches[idx].of_node,
-						"ti,enable-ldo8-tracking");
+						np, "ti,enable-ldo8-tracking");
 	}
 
 	pdata->ldo6_vibrator = of_property_read_bool(node, "ti,ldo6-vibrator");
+
+	return 0;
 }
 
 static const struct of_device_id of_palmas_match_tbl[] = {
@@ -1628,7 +1635,9 @@ static int palmas_regulators_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, pmic);
 	pmic->palmas->pmic_ddata = driver_data;
 
-	palmas_dt_to_pdata(&pdev->dev, node, pdata, driver_data);
+	ret = palmas_dt_to_pdata(&pdev->dev, node, pdata, driver_data);
+	if (ret)
+		return ret;
 
 	ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, &reg);
 	if (ret)

drivers/regulator/pv88080-regulator.c

+/*
+ * pv88080-regulator.c - Regulator device driver for PV88080
+ * Copyright (C) 2016  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 "pv88080-regulator.h"
+
+#define PV88080_MAX_REGULATORS	3
+
+/* PV88080 REGULATOR IDs */
+enum {
+	/* BUCKs */
+	PV88080_ID_BUCK1,
+	PV88080_ID_BUCK2,
+	PV88080_ID_BUCK3,
+};
+
+struct pv88080_regulator {
+	struct regulator_desc desc;
+	/* Current limiting */
+	unsigned int n_current_limits;
+	const int *current_limits;
+	unsigned int limit_mask;
+	unsigned int conf;
+	unsigned int conf2;
+	unsigned int conf5;
+};
+
+struct pv88080 {
+	struct device *dev;
+	struct regmap *regmap;
+	struct regulator_dev *rdev[PV88080_MAX_REGULATORS];
+};
+
+struct pv88080_buck_voltage {
+	int min_uV;
+	int max_uV;
+	int uV_step;
+};
+
+static const struct regmap_config pv88080_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 pv88080_buck1_limits[] = {
+	3230000, 5130000, 6960000, 8790000
+};
+
+static const int pv88080_buck23_limits[] = {
+	1496000, 2393000, 3291000, 4189000
+};
+
+static const struct pv88080_buck_voltage pv88080_buck_vol[2] = {
+	{
+		.min_uV = 600000,
+		.max_uV = 1393750,
+		.uV_step = 6250,
+	},
+	{
+		.min_uV = 1400000,
+		.max_uV = 2193750,
+		.uV_step = 6250,
+	},
+};
+
+static unsigned int pv88080_buck_get_mode(struct regulator_dev *rdev)
+{
+	struct pv88080_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 & PV88080_BUCK1_MODE_MASK) {
+	case PV88080_BUCK_MODE_SYNC:
+		mode = REGULATOR_MODE_FAST;
+		break;
+	case PV88080_BUCK_MODE_AUTO:
+		mode = REGULATOR_MODE_NORMAL;
+		break;
+	case PV88080_BUCK_MODE_SLEEP:
+		mode = REGULATOR_MODE_STANDBY;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return mode;
+}
+
+static int pv88080_buck_set_mode(struct regulator_dev *rdev,
+					unsigned int mode)
+{
+	struct pv88080_regulator *info = rdev_get_drvdata(rdev);
+	int val = 0;
+
+	switch (mode) {
+	case REGULATOR_MODE_FAST:
+		val = PV88080_BUCK_MODE_SYNC;
+		break;
+	case REGULATOR_MODE_NORMAL:
+		val = PV88080_BUCK_MODE_AUTO;
+		break;
+	case REGULATOR_MODE_STANDBY:
+		val = PV88080_BUCK_MODE_SLEEP;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return regmap_update_bits(rdev->regmap, info->conf,
+					PV88080_BUCK1_MODE_MASK, val);
+}
+
+static int pv88080_set_current_limit(struct regulator_dev *rdev, int min,
+				    int max)
+{
+	struct pv88080_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 << PV88080_BUCK1_ILIM_SHIFT);
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int pv88080_get_current_limit(struct regulator_dev *rdev)
+{
+	struct pv88080_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) >> PV88080_BUCK1_ILIM_SHIFT;
+	return info->current_limits[data];
+}
+
+static struct regulator_ops pv88080_buck_ops = {
+	.get_mode = pv88080_buck_get_mode,
+	.set_mode = pv88080_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 = pv88080_set_current_limit,
+	.get_current_limit = pv88080_get_current_limit,
+};
+
+#define PV88080_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 = &pv88080_buck_ops,\
+		.min_uV = min, \
+		.uV_step = step, \
+		.n_voltages = ((max) - (min))/(step) + 1, \
+		.enable_reg = PV88080_REG_##regl_name##_CONF0, \
+		.enable_mask = PV88080_##regl_name##_EN, \
+		.vsel_reg = PV88080_REG_##regl_name##_CONF0, \
+		.vsel_mask = PV88080_V##regl_name##_MASK, \
+	},\
+	.current_limits = limits_array, \
+	.n_current_limits = ARRAY_SIZE(limits_array), \
+	.limit_mask = PV88080_##regl_name##_ILIM_MASK, \
+	.conf = PV88080_REG_##regl_name##_CONF1, \
+	.conf2 = PV88080_REG_##regl_name##_CONF2, \
+	.conf5 = PV88080_REG_##regl_name##_CONF5, \
+}
+
+static struct pv88080_regulator pv88080_regulator_info[] = {
+	PV88080_BUCK(PV88080, BUCK1, 600000, 6250, 1393750,
+		pv88080_buck1_limits),
+	PV88080_BUCK(PV88080, BUCK2, 600000, 6250, 1393750,
+		pv88080_buck23_limits),
+	PV88080_BUCK(PV88080, BUCK3, 600000, 6250, 1393750,
+		pv88080_buck23_limits),
+};
+
+static irqreturn_t pv88080_irq_handler(int irq, void *data)
+{
+	struct pv88080 *chip = data;
+	int i, reg_val, err, ret = IRQ_NONE;
+
+	err = regmap_read(chip->regmap, PV88080_REG_EVENT_A, &reg_val);
+	if (err < 0)
+		goto error_i2c;
+
+	if (reg_val & PV88080_E_VDD_FLT) {
+		for (i = 0; i < PV88080_MAX_REGULATORS; i++) {
+			if (chip->rdev[i] != NULL) {
+				regulator_notifier_call_chain(chip->rdev[i],
+					REGULATOR_EVENT_UNDER_VOLTAGE,
+					NULL);
+			}
+		}
+
+		err = regmap_write(chip->regmap, PV88080_REG_EVENT_A,
+			PV88080_E_VDD_FLT);
+		if (err < 0)
+			goto error_i2c;
+
+		ret = IRQ_HANDLED;
+	}
+
+	if (reg_val & PV88080_E_OVER_TEMP) {
+		for (i = 0; i < PV88080_MAX_REGULATORS; i++) {
+			if (chip->rdev[i] != NULL) {
+				regulator_notifier_call_chain(chip->rdev[i],
+					REGULATOR_EVENT_OVER_TEMP,
+					NULL);
+			}
+		}
+
+		err = regmap_write(chip->regmap, PV88080_REG_EVENT_A,
+			PV88080_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 pv88080_i2c_probe(struct i2c_client *i2c,
+		const struct i2c_device_id *id)
+{
+	struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev);
+	struct pv88080 *chip;
+	struct regulator_config config = { };
+	int i, error, ret;
+	unsigned int conf2, conf5;
+
+	chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88080), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	chip->dev = &i2c->dev;
+	chip->regmap = devm_regmap_init_i2c(i2c, &pv88080_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, PV88080_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, PV88080_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, PV88080_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,
+					pv88080_irq_handler,
+					IRQF_TRIGGER_LOW|IRQF_ONESHOT,
+					"pv88080", chip);
+		if (ret != 0) {
+			dev_err(chip->dev, "Failed to request IRQ: %d\n",
+				i2c->irq);
+			return ret;
+		}
+
+		ret = regmap_update_bits(chip->regmap, PV88080_REG_MASK_A,
+			PV88080_M_VDD_FLT | PV88080_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 < PV88080_MAX_REGULATORS; i++) {
+		if (init_data)
+			config.init_data = &init_data[i];
+
+		ret = regmap_read(chip->regmap,
+			pv88080_regulator_info[i].conf2, &conf2);
+		if (ret < 0)
+			return ret;
+
+		conf2 = ((conf2 >> PV88080_BUCK_VDAC_RANGE_SHIFT) &
+			PV88080_BUCK_VDAC_RANGE_MASK);
+
+		ret = regmap_read(chip->regmap,
+			pv88080_regulator_info[i].conf5, &conf5);
+		if (ret < 0)
+			return ret;
+
+		conf5 = ((conf5 >> PV88080_BUCK_VRANGE_GAIN_SHIFT) &
+			PV88080_BUCK_VRANGE_GAIN_MASK);
+
+		pv88080_regulator_info[i].desc.min_uV =
+			pv88080_buck_vol[conf2].min_uV * (conf5+1);
+		pv88080_regulator_info[i].desc.uV_step =
+			pv88080_buck_vol[conf2].uV_step * (conf5+1);
+		pv88080_regulator_info[i].desc.n_voltages =
+			((pv88080_buck_vol[conf2].max_uV * (conf5+1))
+			- (pv88080_regulator_info[i].desc.min_uV))
+			/(pv88080_regulator_info[i].desc.uV_step) + 1;
+
+		config.driver_data = (void *)&pv88080_regulator_info[i];
+		chip->rdev[i] = devm_regulator_register(chip->dev,
+			&pv88080_regulator_info[i].desc, &config);
+		if (IS_ERR(chip->rdev[i])) {
+			dev_err(chip->dev,
+				"Failed to register PV88080 regulator\n");
+			return PTR_ERR(chip->rdev[i]);
+		}
+	}
+
+	return 0;
+}
+
+static const struct i2c_device_id pv88080_i2c_id[] = {
+	{"pv88080", 0},
+	{},
+};
+MODULE_DEVICE_TABLE(i2c, pv88080_i2c_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id pv88080_dt_ids[] = {
+	{ .compatible = "pvs,pv88080", .data = &pv88080_i2c_id[0] },
+	{},
+};
+MODULE_DEVICE_TABLE(of, pv88080_dt_ids);
+#endif
+
+static struct i2c_driver pv88080_regulator_driver = {
+	.driver = {
+		.name = "pv88080",
+		.of_match_table = of_match_ptr(pv88080_dt_ids),
+	},
+	.probe = pv88080_i2c_probe,
+	.id_table = pv88080_i2c_id,
+};
+
+module_i2c_driver(pv88080_regulator_driver);
+
+MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
+MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88080");
+MODULE_LICENSE("GPL");

drivers/regulator/pv88080-regulator.h

+/*
+ * pv88080-regulator.h - Regulator definitions for PV88080
+ * Copyright (C) 2016 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 __PV88080_REGISTERS_H__
+#define __PV88080_REGISTERS_H__
+
+/* System Control and Event Registers */
+#define	PV88080_REG_EVENT_A			0x04
+#define	PV88080_REG_MASK_A			0x09
+#define	PV88080_REG_MASK_B			0x0a
+#define	PV88080_REG_MASK_C			0x0b
+
+/* Regulator Registers */
+#define	PV88080_REG_BUCK1_CONF0			0x27
+#define	PV88080_REG_BUCK1_CONF1			0x28
+#define	PV88080_REG_BUCK1_CONF2			0x59
+#define	PV88080_REG_BUCK1_CONF5			0x5c
+#define	PV88080_REG_BUCK2_CONF0			0x29
+#define	PV88080_REG_BUCK2_CONF1			0x2a
+#define	PV88080_REG_BUCK2_CONF2			0x61
+#define	PV88080_REG_BUCK2_CONF5			0x64
+#define	PV88080_REG_BUCK3_CONF0			0x2b
+#define	PV88080_REG_BUCK3_CONF1			0x2c
+#define	PV88080_REG_BUCK3_CONF2			0x69
+#define	PV88080_REG_BUCK3_CONF5			0x6c
+
+/* PV88080_REG_EVENT_A (addr=0x04) */
+#define	PV88080_E_VDD_FLT				0x01
+#define	PV88080_E_OVER_TEMP			0x02
+
+/* PV88080_REG_MASK_A (addr=0x09) */
+#define	PV88080_M_VDD_FLT				0x01
+#define	PV88080_M_OVER_TEMP			0x02
+
+/* PV88080_REG_BUCK1_CONF0 (addr=0x27) */
+#define	PV88080_BUCK1_EN				0x80
+#define PV88080_VBUCK1_MASK			0x7F
+/* PV88080_REG_BUCK2_CONF0 (addr=0x29) */
+#define	PV88080_BUCK2_EN				0x80
+#define PV88080_VBUCK2_MASK			0x7F
+/* PV88080_REG_BUCK3_CONF0 (addr=0x2b) */
+#define	PV88080_BUCK3_EN				0x80
+#define PV88080_VBUCK3_MASK			0x7F
+
+/* PV88080_REG_BUCK1_CONF1 (addr=0x28) */
+#define PV88080_BUCK1_ILIM_SHIFT			2
+#define PV88080_BUCK1_ILIM_MASK			0x0C
+#define PV88080_BUCK1_MODE_MASK			0x03
+
+/* PV88080_REG_BUCK2_CONF1 (addr=0x2a) */
+#define PV88080_BUCK2_ILIM_SHIFT			2
+#define PV88080_BUCK2_ILIM_MASK			0x0C
+#define PV88080_BUCK2_MODE_MASK			0x03
+
+/* PV88080_REG_BUCK3_CONF1 (addr=0x2c) */
+#define PV88080_BUCK3_ILIM_SHIFT			2
+#define PV88080_BUCK3_ILIM_MASK			0x0C
+#define PV88080_BUCK3_MODE_MASK			0x03
+
+#define	PV88080_BUCK_MODE_SLEEP			0x00
+#define	PV88080_BUCK_MODE_AUTO			0x01
+#define	PV88080_BUCK_MODE_SYNC			0x02
+
+/* PV88080_REG_BUCK2_CONF2 (addr=0x61) */
+/* PV88080_REG_BUCK3_CONF2 (addr=0x69) */
+#define PV88080_BUCK_VDAC_RANGE_SHIFT			7
+#define PV88080_BUCK_VDAC_RANGE_MASK			0x01
+
+#define PV88080_BUCK_VDAC_RANGE_1			0x00
+#define PV88080_BUCK_VDAC_RANGE_2			0x01
+
+/* PV88080_REG_BUCK2_CONF5 (addr=0x64) */
+/* PV88080_REG_BUCK3_CONF5 (addr=0x6c) */
+#define PV88080_BUCK_VRANGE_GAIN_SHIFT			0
+#define PV88080_BUCK_VRANGE_GAIN_MASK			0x01
+
+#define PV88080_BUCK_VRANGE_GAIN_1			0x00
+#define PV88080_BUCK_VRANGE_GAIN_2			0x01
+
+#endif	/* __PV88080_REGISTERS_H__ */

include/linux/regulator/max8973-regulator.h

@@ -54,6 +54,10 @@
  * @reg_init_data: The regulator init data.
  * @control_flags: Control flags which are ORed value of above flags to
  *		configure device.
+ * @junction_temp_warning: Junction temp in millicelcius on which warning need
+ *			   to be set. Thermal functionality is only supported on
+ *			   MAX77621. The threshold warning supported by MAX77621
+ *			   are 120C and 140C.
  * @enable_ext_control: Enable the voltage enable/disable through external
  *		control signal from EN input pin. If it is false then
  *		voltage output will be enabled/disabled through EN bit of
@@ -67,6 +71,7 @@
 struct max8973_regulator_platform_data {
 	struct regulator_init_data *reg_init_data;
 	unsigned long control_flags;
+	unsigned long junction_temp_warning;
 	bool enable_ext_control;
 	int enable_gpio;
 	int dvs_gpio;