Merge remote-tracking branches 'regulator/topic/max1586', 'regulator/…

…topic/max77802' and 'regulator/topic/of' into regulator-next

Documentation/devicetree/bindings/regulator/max1586-regulator.txt

@@ -0,0 +1,28 @@
+Maxim MAX1586 voltage regulator
+
+Required properties:
+- compatible: must be "maxim,max1586"
+- reg: I2C slave address, usually 0x14
+- v3-gain: integer specifying the V3 gain as per datasheet
+           (1 + R24/R25 + R24/185.5kOhm)
+- any required generic properties defined in regulator.txt
+
+Example:
+
+	i2c_master {
+		max1586@14 {
+			compatible = "maxim,max1586";
+			reg = <0x14>;
+			v3-gain = <1000000>;
+
+			regulators {
+				vcc_core: v3 {
+					regulator-name = "vcc_core";
+					regulator-compatible = "Output_V3";
+					regulator-min-microvolt = <1000000>;
+					regulator-max-microvolt = <1705000>;
+					regulator-always-on;
+				};
+			};
+		};
+	};

Documentation/devicetree/bindings/regulator/max77802.txt

@@ -0,0 +1,53 @@
+Binding for Maxim MAX77802 regulators
+
+This is a part of device tree bindings of MAX77802 multi-function device.
+More information can be found in bindings/mfd/max77802.txt file.
+
+The MAX77802 PMIC has 10 high-efficiency Buck and 32 Low-dropout (LDO)
+regulators that can be controlled over I2C.
+
+Following properties should be present in main device node of the MFD chip.
+
+Optional node:
+- regulators : The regulators of max77802 have to be instantiated
+  under subnode named "regulators" using the following format.
+
+	regulator-name {
+		standard regulator constraints....
+	};
+	refer Documentation/devicetree/bindings/regulator/regulator.txt
+
+The regulator node name should be initialized with a string to get matched
+with their hardware counterparts as follow. The valid names are:
+
+	-LDOn 	:	for LDOs, where n can lie in ranges 1-15, 17-21, 23-30
+			and 32-35.
+			example: LDO1, LDO2, LDO35.
+	-BUCKn 	:	for BUCKs, where n can lie in range 1 to 10.
+			example: BUCK1, BUCK5, BUCK10.
+Example:
+
+	max77802@09 {
+		compatible = "maxim,max77802";
+		interrupt-parent = <&wakeup_eint>;
+		interrupts = <26 0>;
+		reg = <0x09>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		regulators {
+			ldo11_reg: LDO11 {
+				regulator-name = "vdd_ldo11";
+				regulator-min-microvolt = <1900000>;
+				regulator-max-microvolt = <1900000>;
+				regulator-always-on;
+			};
+
+			buck1_reg: BUCK1 {
+				regulator-name = "vdd_mif";
+				regulator-min-microvolt = <950000>;
+				regulator-max-microvolt = <1300000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+	};

drivers/regulator/Kconfig

@@ -405,6 +405,15 @@ config REGULATOR_MAX77693
 	  and one current regulator 'CHARGER'. This is suitable for
 	  Exynos-4x12 chips.
 
+config REGULATOR_MAX77802
+	tristate "Maxim 77802 regulator"
+	depends on MFD_MAX77686
+	help
+	  This driver controls a Maxim 77802 regulator
+	  via I2C bus. The provided regulator is suitable for
+	  Exynos5420/Exynos5800 SoCs to control various voltages.
+	  It includes support for control of voltage and ramp speed.
+
 config REGULATOR_MC13XXX_CORE
 	tristate
 

drivers/regulator/Makefile

@@ -54,6 +54,7 @@ obj-$(CONFIG_REGULATOR_MAX8997) += max8997.o
 obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o
 obj-$(CONFIG_REGULATOR_MAX77686) += max77686.o
 obj-$(CONFIG_REGULATOR_MAX77693) += max77693.o
+obj-$(CONFIG_REGULATOR_MAX77802) += max77802.o
 obj-$(CONFIG_REGULATOR_MC13783) += mc13783-regulator.o
 obj-$(CONFIG_REGULATOR_MC13892) += mc13892-regulator.o
 obj-$(CONFIG_REGULATOR_MC13XXX_CORE) +=  mc13xxx-regulator-core.o

drivers/regulator/internal.h

@@ -35,8 +35,18 @@ struct regulator {
 	struct dentry *debugfs;
 };
 
+#ifdef CONFIG_OF
 struct regulator_init_data *regulator_of_get_init_data(struct device *dev,
 			         const struct regulator_desc *desc,
 				 struct device_node **node);
+#else
+static inline struct regulator_init_data *
+regulator_of_get_init_data(struct device *dev,
+			   const struct regulator_desc *desc,
+			   struct device_node **node)
+{
+	return NULL;
+}
+#endif
 
 #endif

drivers/regulator/max1586.c

@@ -24,6 +24,8 @@
 #include <linux/regulator/driver.h>
 #include <linux/slab.h>
 #include <linux/regulator/max1586.h>
+#include <linux/of_device.h>
+#include <linux/regulator/of_regulator.h>
 
 #define MAX1586_V3_MAX_VSEL 31
 #define MAX1586_V6_MAX_VSEL 3
@@ -157,13 +159,87 @@ static struct regulator_desc max1586_reg[] = {
 	},
 };
 
+static int of_get_max1586_platform_data(struct device *dev,
+				 struct max1586_platform_data *pdata)
+{
+	struct max1586_subdev_data *sub;
+	struct of_regulator_match rmatch[ARRAY_SIZE(max1586_reg)];
+	struct device_node *np = dev->of_node;
+	int i, matched;
+
+	if (of_property_read_u32(np, "v3-gain",
+				 &pdata->v3_gain) < 0) {
+		dev_err(dev, "%s has no 'v3-gain' property\n", np->full_name);
+		return -EINVAL;
+	}
+
+	np = of_get_child_by_name(np, "regulators");
+	if (!np) {
+		dev_err(dev, "missing 'regulators' subnode in DT\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(rmatch); i++)
+		rmatch[i].name = max1586_reg[i].name;
+
+	matched = of_regulator_match(dev, np, rmatch, ARRAY_SIZE(rmatch));
+	of_node_put(np);
+	/*
+	 * If matched is 0, ie. neither Output_V3 nor Output_V6 have been found,
+	 * return 0, which signals the normal situation where no subregulator is
+	 * available. This is normal because the max1586 doesn't provide any
+	 * readback support, so the subregulators can't report any status
+	 * anyway.  If matched < 0, return the error.
+	 */
+	if (matched <= 0)
+		return matched;
+
+	pdata->subdevs = devm_kzalloc(dev, sizeof(struct max1586_subdev_data) *
+						matched, GFP_KERNEL);
+	if (!pdata->subdevs)
+		return -ENOMEM;
+
+	pdata->num_subdevs = matched;
+	sub = pdata->subdevs;
+
+	for (i = 0; i < matched; i++) {
+		sub->id = i;
+		sub->name = rmatch[i].of_node->name;
+		sub->platform_data = rmatch[i].init_data;
+		sub++;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id max1586_of_match[] = {
+	{ .compatible = "maxim,max1586", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, max1586_of_match);
+
 static int max1586_pmic_probe(struct i2c_client *client,
 					const struct i2c_device_id *i2c_id)
 {
-	struct max1586_platform_data *pdata = dev_get_platdata(&client->dev);
+	struct max1586_platform_data *pdata, pdata_of;
 	struct regulator_config config = { };
 	struct max1586_data *max1586;
-	int i, id;
+	int i, id, ret;
+	const struct of_device_id *match;
+
+	pdata = dev_get_platdata(&client->dev);
+	if (client->dev.of_node && !pdata) {
+		match = of_match_device(of_match_ptr(max1586_of_match),
+					&client->dev);
+		if (!match) {
+			dev_err(&client->dev, "Error: No device match found\n");
+			return -ENODEV;
+		}
+		ret = of_get_max1586_platform_data(&client->dev, &pdata_of);
+		if (ret < 0)
+			return ret;
+		pdata = &pdata_of;
+	}
 
 	max1586 = devm_kzalloc(&client->dev, sizeof(struct max1586_data),
 			GFP_KERNEL);
@@ -229,6 +305,7 @@ static struct i2c_driver max1586_pmic_driver = {
 	.driver		= {
 		.name	= "max1586",
 		.owner	= THIS_MODULE,
+		.of_match_table = of_match_ptr(max1586_of_match),
 	},
 	.id_table	= max1586_id,
 };