Merge remote-tracking branch 'regulator/topic/s5m8767' into regulator-next

Documentation/devicetree/bindings/regulator/s5m8767-regulator.txt

+* Samsung S5M8767 Voltage and Current Regulator
+
+The Samsung S5M8767 is a multi-function device which includes volatage and
+current regulators, rtc, charger controller and other sub-blocks. It is
+interfaced to the host controller using a i2c interface. Each sub-block is
+addressed by the host system using different i2c slave address. This document
+describes the bindings for 'pmic' sub-block of s5m8767.
+
+Required properties:
+- compatible: Should be "samsung,s5m8767-pmic".
+- reg: Specifies the i2c slave address of the pmic block. It should be 0x66.
+
+- s5m8767,pmic-buck2-dvs-voltage: A set of 8 voltage values in micro-volt (uV)
+  units for buck2 when changing voltage using gpio dvs. Refer to [1] below
+  for additional information.
+
+- s5m8767,pmic-buck3-dvs-voltage: A set of 8 voltage values in micro-volt (uV)
+  units for buck3 when changing voltage using gpio dvs. Refer to [1] below
+  for additional information.
+
+- s5m8767,pmic-buck4-dvs-voltage: A set of 8 voltage values in micro-volt (uV)
+  units for buck4 when changing voltage using gpio dvs. Refer to [1] below
+  for additional information.
+
+- s5m8767,pmic-buck-ds-gpios: GPIO specifiers for three host gpio's used
+  for selecting GPIO DVS lines. It is one-to-one mapped to dvs gpio lines.
+
+[1] If none of the 's5m8767,pmic-buck[2/3/4]-uses-gpio-dvs' optional
+    property is specified, the 's5m8767,pmic-buck[2/3/4]-dvs-voltage'
+    property should specify atleast one voltage level (which would be a
+    safe operating voltage).
+
+    If either of the 's5m8767,pmic-buck[2/3/4]-uses-gpio-dvs' optional
+    property is specified, then all the eight voltage values for the
+    's5m8767,pmic-buck[2/3/4]-dvs-voltage' should be specified.
+
+Optional properties:
+- interrupt-parent: Specifies the phandle of the interrupt controller to which
+  the interrupts from s5m8767 are delivered to.
+- interrupts: Interrupt specifiers for two interrupt sources.
+  - First interrupt specifier is for 'irq1' interrupt.
+  - Second interrupt specifier is for 'alert' interrupt.
+- s5m8767,pmic-buck2-uses-gpio-dvs: 'buck2' can be controlled by gpio dvs.
+- s5m8767,pmic-buck3-uses-gpio-dvs: 'buck3' can be controlled by gpio dvs.
+- s5m8767,pmic-buck4-uses-gpio-dvs: 'buck4' can be controlled by gpio dvs.
+
+Additional properties required if either of the optional properties are used:
+
+- s5m8767,pmic-buck234-default-dvs-idx: Default voltage setting selected from
+  the possible 8 options selectable by the dvs gpios. The value of this
+  property should be between 0 and 7. If not specified or if out of range, the
+  default value of this property is set to 0.
+
+- s5m8767,pmic-buck-dvs-gpios: GPIO specifiers for three host gpio's used
+  for dvs. The format of the gpio specifier depends in the gpio controller.
+
+Regulators: The regulators of s5m8767 that have to be instantiated should be
+included in a sub-node named 'regulators'. Regulator nodes included in this
+sub-node should be of the format as listed below.
+
+	regulator_name {
+		ldo1_reg: LDO1 {
+			regulator-name = "VDD_ALIVE_1.0V";
+			regulator-min-microvolt = <1100000>;
+			regulator-max-microvolt = <1100000>;
+			regulator-always-on;
+			regulator-boot-on;
+			op_mode = <1>; /* Normal Mode */
+		};
+	};
+The above regulator entries are defined in regulator bindings documentation
+except op_mode description.
+	- op_mode: describes the different operating modes of the LDO's with
+		power mode change in SOC. The different possible values are,
+		0 - always off mode
+		1 - on in normal mode
+		2 - low power mode
+		3 - suspend mode
+
+The following are the names of the regulators that the s5m8767 pmic block
+supports. Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number
+as per the datasheet of s5m8767.
+
+	- LDOn
+		  - valid values for n are 1 to 28
+		  - Example: LDO0, LD01, LDO28
+	- BUCKn
+		  - valid values for n are 1 to 9.
+		  - Example: BUCK1, BUCK2, BUCK9
+
+The bindings inside the regulator nodes use the standard regulator bindings
+which are documented elsewhere.
+
+Example:
+
+	s5m8767_pmic@66 {
+		compatible = "samsung,s5m8767-pmic";
+		reg = <0x66>;
+
+		s5m8767,pmic-buck2-uses-gpio-dvs;
+		s5m8767,pmic-buck3-uses-gpio-dvs;
+		s5m8767,pmic-buck4-uses-gpio-dvs;
+
+		s5m8767,pmic-buck-default-dvs-idx = <0>;
+
+		s5m8767,pmic-buck-dvs-gpios = <&gpx0 0 1 0 0>, /* DVS1 */
+						 <&gpx0 1 1 0 0>, /* DVS2 */
+						 <&gpx0 2 1 0 0>; /* DVS3 */
+
+		s5m8767,pmic-buck-ds-gpios = <&gpx2 3 1 0 0>, /* SET1 */
+						<&gpx2 4 1 0 0>, /* SET2 */
+						<&gpx2 5 1 0 0>; /* SET3 */
+
+		s5m8767,pmic-buck2-dvs-voltage = <1350000>, <1300000>,
+						 <1250000>, <1200000>,
+						 <1150000>, <1100000>,
+						 <1000000>, <950000>;
+
+		s5m8767,pmic-buck3-dvs-voltage = <1100000>, <1100000>,
+						 <1100000>, <1100000>,
+						 <1000000>, <1000000>,
+						 <1000000>, <1000000>;
+
+		s5m8767,pmic-buck4-dvs-voltage = <1200000>, <1200000>,
+						 <1200000>, <1200000>,
+						 <1200000>, <1200000>,
+						 <1200000>, <1200000>;
+
+		regulators {
+			ldo1_reg: LDO1 {
+				regulator-name = "VDD_ABB_3.3V";
+				regulator-min-microvolt = <3300000>;
+				regulator-max-microvolt = <3300000>;
+				op_mode = <1>; /* Normal Mode */
+			};
+
+			ldo2_reg: LDO2 {
+				regulator-name = "VDD_ALIVE_1.1V";
+				regulator-min-microvolt = <1100000>;
+				regulator-max-microvolt = <1100000>;
+				regulator-always-on;
+			};
+
+			buck1_reg: BUCK1 {
+				regulator-name = "VDD_MIF_1.2V";
+				regulator-min-microvolt = <950000>;
+				regulator-max-microvolt = <1350000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+		};
+	};

drivers/mfd/sec-core.c

@@ -17,6 +17,7 @@
 #include <linux/err.h>
 #include <linux/slab.h>
 #include <linux/i2c.h>
+#include <linux/of_irq.h>
 #include <linux/interrupt.h>
 #include <linux/pm_runtime.h>
 #include <linux/mutex.h>
@@ -60,6 +61,15 @@ static struct mfd_cell s2mps11_devs[] = {
 	},
 };
 
+#ifdef CONFIG_OF
+static struct of_device_id sec_dt_match[] = {
+	{	.compatible = "samsung,s5m8767-pmic",
+		.data = (void *)S5M8767X,
+	},
+	{},
+};
+#endif
+
 int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest)
 {
 	return regmap_read(sec_pmic->regmap, reg, dest);
@@ -95,6 +105,57 @@ static struct regmap_config sec_regmap_config = {
 	.val_bits = 8,
 };
 
+
+#ifdef CONFIG_OF
+/*
+ * Only the common platform data elements for s5m8767 are parsed here from the
+ * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
+ * others have to parse their own platform data elements from device tree.
+ *
+ * The s5m8767 platform data structure is instantiated here and the drivers for
+ * the sub-modules need not instantiate another instance while parsing their
+ * platform data.
+ */
+static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
+					struct device *dev)
+{
+	struct sec_platform_data *pd;
+
+	pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
+	if (!pd) {
+		dev_err(dev, "could not allocate memory for pdata\n");
+		return ERR_PTR(-ENOMEM);
+	}
+
+	/*
+	 * ToDo: the 'wakeup' member in the platform data is more of a linux
+	 * specfic information. Hence, there is no binding for that yet and
+	 * not parsed here.
+	 */
+
+	return pd;
+}
+#else
+static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
+					struct device *dev)
+{
+	return 0;
+}
+#endif
+
+static inline int sec_i2c_get_driver_data(struct i2c_client *i2c,
+						const struct i2c_device_id *id)
+{
+#ifdef CONFIG_OF
+	if (i2c->dev.of_node) {
+		const struct of_device_id *match;
+		match = of_match_node(sec_dt_match, i2c->dev.of_node);
+		return (int)match->data;
+	}
+#endif
+	return (int)id->driver_data;
+}
+
 static int sec_pmic_probe(struct i2c_client *i2c,
 			    const struct i2c_device_id *id)
 {
@@ -111,13 +172,22 @@ static int sec_pmic_probe(struct i2c_client *i2c,
 	sec_pmic->dev = &i2c->dev;
 	sec_pmic->i2c = i2c;
 	sec_pmic->irq = i2c->irq;
-	sec_pmic->type = id->driver_data;
-
+	sec_pmic->type = sec_i2c_get_driver_data(i2c, id);
+
+	if (sec_pmic->dev->of_node) {
+		pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
+		if (IS_ERR(pdata)) {
+			ret = PTR_ERR(pdata);
+			return ret;
+		}
+		pdata->device_type = sec_pmic->type;
+	}
 	if (pdata) {
 		sec_pmic->device_type = pdata->device_type;
 		sec_pmic->ono = pdata->ono;
 		sec_pmic->irq_base = pdata->irq_base;
 		sec_pmic->wakeup = pdata->wakeup;
+		sec_pmic->pdata = pdata;
 	}
 
 	sec_pmic->regmap = devm_regmap_init_i2c(i2c, &sec_regmap_config);
@@ -192,6 +262,7 @@ static struct i2c_driver sec_pmic_driver = {
 	.driver = {
 		   .name = "sec_pmic",
 		   .owner = THIS_MODULE,
+		   .of_match_table = of_match_ptr(sec_dt_match),
 	},
 	.probe = sec_pmic_probe,
 	.remove = sec_pmic_remove,

include/linux/mfd/samsung/core.h

@@ -26,6 +26,7 @@ enum sec_device_type {
 /**
  * struct sec_pmic_dev - s5m87xx master device for sub-drivers
  * @dev: master device of the chip (can be used to access platform data)
+ * @pdata: pointer to private data used to pass platform data to child
  * @i2c: i2c client private data for regulator
  * @rtc: i2c client private data for rtc
  * @iolock: mutex for serializing io access
@@ -39,6 +40,7 @@ enum sec_device_type {
  */
 struct sec_pmic_dev {
 	struct device *dev;
+	struct sec_platform_data *pdata;
 	struct regmap *regmap;
 	struct i2c_client *i2c;
 	struct i2c_client *rtc;
@@ -82,11 +84,11 @@ struct sec_platform_data {
 
 	int				buck_gpios[3];
 	int				buck_ds[3];
-	int				buck2_voltage[8];
+	unsigned int			buck2_voltage[8];
 	bool				buck2_gpiodvs;
-	int				buck3_voltage[8];
+	unsigned int			buck3_voltage[8];
 	bool				buck3_gpiodvs;
-	int				buck4_voltage[8];
+	unsigned int			buck4_voltage[8];
 	bool				buck4_gpiodvs;
 
 	int				buck_set1;
@@ -127,6 +129,7 @@ struct sec_platform_data {
 struct sec_regulator_data {
 	int				id;
 	struct regulator_init_data	*initdata;
+	struct device_node *reg_node;
 };
 
 /*
@@ -136,7 +139,7 @@ struct sec_regulator_data {
  */
 struct sec_opmode_data {
 	int id;
-	int mode;
+	unsigned int mode;
 };
 
 /*