Merge remote-tracking branches 'regulator/topic/88pg86x', 'regulator/topic/dt', 'regulator/topic/formatting' and 'regulator/topic/gpio' into regulator-next

Documentation/devicetree/bindings/regulator/88pg86x.txt

@@ -0,0 +1,22 @@
+Marvell 88PG867/88PG868 voltage regulators
+
+Required properties:
+- compatible: one of "marvell,88pg867", "marvell,88pg868";
+- reg: I2C slave address.
+
+Optional subnodes for regulators: "buck1", "buck2", using common regulator
+bindings given in <Documentation/devicetree/bindings/regulator/regulator.txt>.
+
+Example:
+
+	pg868@19 {
+		compatible = "marvell,88pg868";
+		reg = <0x19>;
+
+		vcpu: buck1 {
+			regulator-boot-on;
+			regulator-always-on;
+			regulator-min-microvolt = <1000000>;
+			regulator-max-microvolt = <1350000>;
+		};
+	};

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

@@ -2,6 +2,7 @@ Fixed Voltage regulators
 
 Required properties:
 - compatible: Must be "regulator-fixed";
+- regulator-name: Defined in regulator.txt as optional, but required here.
 
 Optional properties:
 - gpio: gpio to use for enable control

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

@@ -2,6 +2,8 @@ GPIO controlled regulators
 
 Required properties:
 - compatible		: Must be "regulator-gpio".
+- regulator-name	: Defined in regulator.txt as optional, but required
+			  here.
 - states		: Selection of available voltages and GPIO configs.
                           if there are no states, then use a fixed regulator
 

drivers/regulator/88pg86x.c

@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/of.h>
+#include <linux/regulator/driver.h>
+#include <linux/regmap.h>
+
+static const struct regulator_ops pg86x_ops = {
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+	.list_voltage = regulator_list_voltage_linear_range,
+};
+
+static const struct regulator_linear_range pg86x_buck1_ranges[] = {
+	REGULATOR_LINEAR_RANGE(      0,  0, 10,     0),
+	REGULATOR_LINEAR_RANGE(1000000, 11, 34, 25000),
+	REGULATOR_LINEAR_RANGE(1600000, 35, 47, 50000),
+};
+
+static const struct regulator_linear_range pg86x_buck2_ranges[] = {
+	REGULATOR_LINEAR_RANGE(      0,  0, 15,     0),
+	REGULATOR_LINEAR_RANGE(1000000, 16, 39, 25000),
+	REGULATOR_LINEAR_RANGE(1600000, 40, 52, 50000),
+};
+
+static const struct regulator_desc pg86x_regulators[] = {
+	{
+		.id = 0,
+		.type = REGULATOR_VOLTAGE,
+		.name = "buck1",
+		.of_match = of_match_ptr("buck1"),
+		.n_voltages = 11 + 24 + 13,
+		.linear_ranges = pg86x_buck1_ranges,
+		.n_linear_ranges = 3,
+		.vsel_reg  = 0x24,
+		.vsel_mask = 0xff,
+		.ops = &pg86x_ops,
+		.owner = THIS_MODULE
+	},
+	{
+		.id = 1,
+		.type = REGULATOR_VOLTAGE,
+		.name = "buck2",
+		.of_match = of_match_ptr("buck2"),
+		.n_voltages = 16 + 24 + 13,
+		.linear_ranges = pg86x_buck2_ranges,
+		.n_linear_ranges = 3,
+		.vsel_reg  = 0x13,
+		.vsel_mask = 0xff,
+		.ops = &pg86x_ops,
+		.owner = THIS_MODULE
+	},
+};
+
+static const struct regmap_config pg86x_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static int pg86x_i2c_probe(struct i2c_client *i2c)
+{
+	int id, ret;
+	struct regulator_config config = {.dev = &i2c->dev};
+	struct regmap *regmap = devm_regmap_init_i2c(i2c, &pg86x_regmap);
+
+	if (IS_ERR(regmap)) {
+		ret = PTR_ERR(regmap);
+		dev_err(&i2c->dev, "regmap init failed: %d\n", ret);
+		return ret;
+	}
+
+	for (id = 0; id < ARRAY_SIZE(pg86x_regulators); id++) {
+		struct regulator_dev *rdev;
+		rdev = devm_regulator_register(&i2c->dev,
+					       &pg86x_regulators[id],
+					       &config);
+		if (IS_ERR(rdev)) {
+			ret = PTR_ERR(rdev);
+			dev_err(&i2c->dev, "failed to register %s: %d\n",
+				pg86x_regulators[id].name, ret);
+			return ret;
+		}
+	}
+	return 0;
+}
+
+static const struct of_device_id pg86x_dt_ids [] = {
+	{ .compatible = "marvell,88pg867" },
+	{ .compatible = "marvell,88pg868" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pg86x_dt_ids);
+
+static const struct i2c_device_id pg86x_i2c_id[] = {
+	{ "88pg867", },
+	{ "88pg868", },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, pg86x_i2c_id);
+
+static struct i2c_driver pg86x_regulator_driver = {
+	.driver = {
+		.name = "88pg86x",
+		.of_match_table = of_match_ptr(pg86x_dt_ids),
+	},
+	.probe_new = pg86x_i2c_probe,
+	.id_table = pg86x_i2c_id,
+};
+
+module_i2c_driver(pg86x_regulator_driver);
+
+MODULE_DESCRIPTION("Marvell 88PG86X voltage regulator");
+MODULE_AUTHOR("Alexander Monakov <amonakov@gmail.com>");
+MODULE_LICENSE("GPL");

drivers/regulator/Kconfig

@@ -54,6 +54,15 @@ config REGULATOR_USERSPACE_CONSUMER
 
 	  If unsure, say no.
 
+config REGULATOR_88PG86X
+	tristate "Marvell 88PG86X voltage regulators"
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  This driver supports Marvell 88PG867 and 88PG868 voltage regulators.
+	  They provide two I2C-controlled DC/DC step-down converters with
+	  sleep mode and separate enable pins.
+
 config REGULATOR_88PM800
 	tristate "Marvell 88PM800 Power regulators"
 	depends on MFD_88PM800

drivers/regulator/Makefile

@@ -10,6 +10,7 @@ obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
 obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o
 obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o
 
+obj-$(CONFIG_REGULATOR_88PG86X) += 88pg86x.o
 obj-$(CONFIG_REGULATOR_88PM800) += 88pm800.o
 obj-$(CONFIG_REGULATOR_88PM8607) += 88pm8607.o
 obj-$(CONFIG_REGULATOR_CPCAP) += cpcap-regulator.o

drivers/regulator/core.c

@@ -1937,7 +1937,10 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 	struct gpio_desc *gpiod;
 	int ret;
 
-	gpiod = gpio_to_desc(config->ena_gpio);
+	if (config->ena_gpiod)
+		gpiod = config->ena_gpiod;
+	else
+		gpiod = gpio_to_desc(config->ena_gpio);
 
 	list_for_each_entry(pin, &regulator_ena_gpio_list, list) {
 		if (pin->gpiod == gpiod) {
@@ -1947,15 +1950,18 @@ static int regulator_ena_gpio_request(struct regulator_dev *rdev,
 		}
 	}
 
-	ret = gpio_request_one(config->ena_gpio,
-				GPIOF_DIR_OUT | config->ena_gpio_flags,
-				rdev_get_name(rdev));
-	if (ret)
-		return ret;
+	if (!config->ena_gpiod) {
+		ret = gpio_request_one(config->ena_gpio,
+				       GPIOF_DIR_OUT | config->ena_gpio_flags,
+				       rdev_get_name(rdev));
+		if (ret)
+			return ret;
+	}
 
 	pin = kzalloc(sizeof(struct regulator_enable_gpio), GFP_KERNEL);
 	if (pin == NULL) {
-		gpio_free(config->ena_gpio);
+		if (!config->ena_gpiod)
+			gpio_free(config->ena_gpio);
 		return -ENOMEM;
 	}
 
@@ -4154,8 +4160,9 @@ regulator_register(const struct regulator_desc *regulator_desc,
 			goto clean;
 	}
 
-	if ((config->ena_gpio || config->ena_gpio_initialized) &&
-	    gpio_is_valid(config->ena_gpio)) {
+	if (config->ena_gpiod ||
+	    ((config->ena_gpio || config->ena_gpio_initialized) &&
+	     gpio_is_valid(config->ena_gpio))) {
 		mutex_lock(&regulator_list_mutex);
 		ret = regulator_ena_gpio_request(rdev, config);
 		mutex_unlock(&regulator_list_mutex);
@@ -4301,6 +4308,7 @@ static int regulator_suspend_late(struct device *dev)
 	return class_for_each_device(&regulator_class, NULL, &state,
 				     _regulator_suspend_late);
 }
+
 static int _regulator_resume_early(struct device *dev, void *data)
 {
 	int ret = 0;

drivers/regulator/da9055-regulator.c

@@ -16,6 +16,7 @@
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
@@ -455,8 +456,7 @@ static int da9055_gpio_init(struct da9055_regulator *regulator,
 		char name[18];
 		int gpio_mux = pdata->gpio_ren[id];
 
-		config->ena_gpio = pdata->ena_gpio[id];
-		config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
+		config->ena_gpiod = pdata->ena_gpiods[id];
 		config->ena_gpio_invert = 1;
 
 		/*

drivers/regulator/da9211-regulator.c

@@ -15,7 +15,6 @@
  */
 
 #include <linux/err.h>
-#include <linux/gpio.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/init.h>
@@ -25,7 +24,7 @@
 #include <linux/regmap.h>
 #include <linux/irq.h>
 #include <linux/interrupt.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/regulator/of_regulator.h>
 #include <linux/regulator/da9211.h>
 #include "da9211-regulator.h"
@@ -294,9 +293,12 @@ static struct da9211_pdata *da9211_parse_regulators_dt(
 
 		pdata->init_data[n] = da9211_matches[i].init_data;
 		pdata->reg_node[n] = da9211_matches[i].of_node;
-		pdata->gpio_ren[n] =
-			of_get_named_gpio(da9211_matches[i].of_node,
-				"enable-gpios", 0);
+		pdata->gpiod_ren[n] = devm_gpiod_get_from_of_node(dev,
+								  da9211_matches[i].of_node,
+								  "enable",
+								  0,
+								  GPIOD_OUT_HIGH,
+								  "da9211-enable");
 		n++;
 	}
 
@@ -382,13 +384,10 @@ static int da9211_regulator_init(struct da9211 *chip)
 		config.regmap = chip->regmap;
 		config.of_node = chip->pdata->reg_node[i];
 
-		if (gpio_is_valid(chip->pdata->gpio_ren[i])) {
-			config.ena_gpio = chip->pdata->gpio_ren[i];
-			config.ena_gpio_initialized = true;
-		} else {
-			config.ena_gpio = -EINVAL;
-			config.ena_gpio_initialized = false;
-		}
+		if (chip->pdata->gpiod_ren[i])
+			config.ena_gpiod = chip->pdata->gpiod_ren[i];
+		else
+			config.ena_gpiod = NULL;
 
 		chip->rdev[i] = devm_regulator_register(chip->dev,
 			&da9211_regulators[i], &config);

drivers/regulator/gpio-regulator.c

@@ -196,6 +196,7 @@ of_get_gpio_regulator_config(struct device *dev, struct device_node *np,
 				break;
 			}
 			config->gpios[i].gpio = gpio;
+			config->gpios[i].label = config->supply_name;
 			if (proplen > 0) {
 				of_property_read_u32_index(np, "gpios-states",
 							   i, &ret);
@@ -271,8 +272,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	drvdata->desc.name = kstrdup(config->supply_name, GFP_KERNEL);
 	if (drvdata->desc.name == NULL) {
 		dev_err(&pdev->dev, "Failed to allocate supply name\n");
-		ret = -ENOMEM;
-		goto err;
+		return -ENOMEM;
 	}
 
 	if (config->nr_gpios != 0) {
@@ -292,7 +292,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 				dev_err(&pdev->dev,
 					"Could not obtain regulator setting GPIOs: %d\n",
 					ret);
-			goto err_memstate;
+			goto err_memgpio;
 		}
 	}
 
@@ -303,7 +303,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	if (drvdata->states == NULL) {
 		dev_err(&pdev->dev, "Failed to allocate state data\n");
 		ret = -ENOMEM;
-		goto err_memgpio;
+		goto err_stategpio;
 	}
 	drvdata->nr_states = config->nr_states;
 
@@ -324,7 +324,7 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	default:
 		dev_err(&pdev->dev, "No regulator type set\n");
 		ret = -EINVAL;
-		goto err_memgpio;
+		goto err_memstate;
 	}
 
 	/* build initial state from gpio init data. */
@@ -361,22 +361,21 @@ static int gpio_regulator_probe(struct platform_device *pdev)
 	if (IS_ERR(drvdata->dev)) {
 		ret = PTR_ERR(drvdata->dev);
 		dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);
-		goto err_stategpio;
+		goto err_memstate;
 	}
 
 	platform_set_drvdata(pdev, drvdata);
 
 	return 0;
 
-err_stategpio:
-	gpio_free_array(drvdata->gpios, drvdata->nr_gpios);
 err_memstate:
 	kfree(drvdata->states);
+err_stategpio:
+	gpio_free_array(drvdata->gpios, drvdata->nr_gpios);
 err_memgpio:
 	kfree(drvdata->gpios);
 err_name:
 	kfree(drvdata->desc.name);
-err:
 	return ret;
 }
 

include/linux/mfd/da9055/pdata.h

@@ -12,6 +12,7 @@
 #define DA9055_MAX_REGULATORS	8
 
 struct da9055;
+struct gpio_desc;
 
 enum gpio_select {
 	NO_GPIO = 0,
@@ -47,7 +48,7 @@ struct da9055_pdata {
 	 * controls the regulator set A/B, 0 if  not available.
 	 */
 	enum gpio_select *reg_rsel;
-	/* GPIOs to enable regulator, 0 if not available */
-	int *ena_gpio;
+	/* GPIO descriptors to enable regulator, NULL if not available */
+	struct gpio_desc **ena_gpiods;
 };
 #endif /* __DA9055_PDATA_H */

include/linux/regulator/da9211.h

@@ -21,6 +21,8 @@
 
 #define DA9211_MAX_REGULATORS	2
 
+struct gpio_desc;
+
 enum da9211_chip_id {
 	DA9211,
 	DA9212,
@@ -39,7 +41,7 @@ struct da9211_pdata {
 	 * 2 : 2 phase 2 buck
 	 */
 	int num_buck;
-	int gpio_ren[DA9211_MAX_REGULATORS];
+	struct gpio_desc *gpiod_ren[DA9211_MAX_REGULATORS];
 	struct device_node *reg_node[DA9211_MAX_REGULATORS];
 	struct regulator_init_data *init_data[DA9211_MAX_REGULATORS];
 };

include/linux/regulator/driver.h

@@ -19,6 +19,7 @@
 #include <linux/notifier.h>
 #include <linux/regulator/consumer.h>
 
+struct gpio_desc;
 struct regmap;
 struct regulator_dev;
 struct regulator_config;
@@ -387,6 +388,7 @@ struct regulator_desc {
  *                        initialized, meaning that >= 0 is a valid gpio
  *                        identifier and < 0 is a non existent gpio.
  * @ena_gpio: GPIO controlling regulator enable.
+ * @ena_gpiod: GPIO descriptor controlling regulator enable.
  * @ena_gpio_invert: Sense for GPIO enable control.
  * @ena_gpio_flags: Flags to use when calling gpio_request_one()
  */
@@ -399,6 +401,7 @@ struct regulator_config {
 
 	bool ena_gpio_initialized;
 	int ena_gpio;
+	struct gpio_desc *ena_gpiod;
 	unsigned int ena_gpio_invert:1;
 	unsigned int ena_gpio_flags;
 };