regulator: tps65910: add support for input supply

There is multiple voltage input pins on device which
takes the voltage input for different voltage regulator.
Support to configure the voltage input supplied by
different regulator for each regulators.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

Documentation/devicetree/bindings/mfd/tps65910.txt

@@ -32,6 +32,28 @@ Optional properties:
   comparator. (see VMBCH_VSEL in TPS65910 datasheet)
 - ti,en-gpio-sleep: enable sleep control for gpios
   There should be 9 entries here, one for each gpio.
+- xxx-supply: Input voltage supply regulator.
+  Missing of these properties will be assume as there is no supply regulator
+  for that input pins and always powered on.
+  The valid input supply properties are:
+  tps65910:
+	vcc1-supply: VDD1 input.
+	vcc2-supply: VDD2 input.
+	vcc3-supply: VAUX33 and VMMC input.
+	vcc4-supply: VAUX1 and VAUX2 input.
+	vcc5-supply: VPLL and VDAC input.
+	vcc6-supply: VDIG1 and VDIG2 input.
+	vcc7-supply: VRTC input.
+	vccio-supply: VIO input.
+  tps65911:
+	vcc1-supply: VDD1 input.
+	vcc2-supply: VDD2 input.
+	vcc3-supply: LDO6, LDO7 and LDO8 input.
+	vcc4-supply: LDO5 input.
+	vcc5-supply: LDO3 and LDO4 input.
+	vcc6-supply: LDO1 and LDO2 input.
+	vcc7-supply: VRTC input.
+	vccio-supply: VIO input.
 
 Regulator Optional properties:
 - ti,regulator-ext-sleep-control: enable external sleep
@@ -57,6 +79,9 @@ Example:
 
 		ti,en-gpio-sleep = <0 0 1 0 0 0 0 0 0>;
 
+		vcc7-supply = <&reg_parent>;
+		vcc1-supply = <&reg_parent>;
+
 		regulators {
 			#address-cells = <1>;
 			#size-cells = <0>;

drivers/regulator/tps65910-regulator.c

@@ -85,6 +85,7 @@ static const unsigned int VMMC_VSEL_table[] = {
 
 struct tps_info {
 	const char *name;
+	const char *vin_name;
 	u8 n_voltages;
 	const unsigned int *voltage_table;
 	int enable_time_us;
@@ -93,20 +94,24 @@ struct tps_info {
 static struct tps_info tps65910_regs[] = {
 	{
 		.name = "vrtc",
+		.vin_name = "vcc7",
 		.enable_time_us = 2200,
 	},
 	{
 		.name = "vio",
+		.vin_name = "vccio",
 		.n_voltages = ARRAY_SIZE(VIO_VSEL_table),
 		.voltage_table = VIO_VSEL_table,
 		.enable_time_us = 350,
 	},
 	{
 		.name = "vdd1",
+		.vin_name = "vcc1",
 		.enable_time_us = 350,
 	},
 	{
 		.name = "vdd2",
+		.vin_name = "vcc2",
 		.enable_time_us = 350,
 	},
 	{
@@ -117,48 +122,56 @@ static struct tps_info tps65910_regs[] = {
 	},
 	{
 		.name = "vdig1",
+		.vin_name = "vcc6",
 		.n_voltages = ARRAY_SIZE(VDIG1_VSEL_table),
 		.voltage_table = VDIG1_VSEL_table,
 		.enable_time_us = 100,
 	},
 	{
 		.name = "vdig2",
+		.vin_name = "vcc6",
 		.n_voltages = ARRAY_SIZE(VDIG2_VSEL_table),
 		.voltage_table = VDIG2_VSEL_table,
 		.enable_time_us = 100,
 	},
 	{
 		.name = "vpll",
+		.vin_name = "vcc5",
 		.n_voltages = ARRAY_SIZE(VPLL_VSEL_table),
 		.voltage_table = VPLL_VSEL_table,
 		.enable_time_us = 100,
 	},
 	{
 		.name = "vdac",
+		.vin_name = "vcc5",
 		.n_voltages = ARRAY_SIZE(VDAC_VSEL_table),
 		.voltage_table = VDAC_VSEL_table,
 		.enable_time_us = 100,
 	},
 	{
 		.name = "vaux1",
+		.vin_name = "vcc4",
 		.n_voltages = ARRAY_SIZE(VAUX1_VSEL_table),
 		.voltage_table = VAUX1_VSEL_table,
 		.enable_time_us = 100,
 	},
 	{
 		.name = "vaux2",
+		.vin_name = "vcc4",
 		.n_voltages = ARRAY_SIZE(VAUX2_VSEL_table),
 		.voltage_table = VAUX2_VSEL_table,
 		.enable_time_us = 100,
 	},
 	{
 		.name = "vaux33",
+		.vin_name = "vcc3",
 		.n_voltages = ARRAY_SIZE(VAUX33_VSEL_table),
 		.voltage_table = VAUX33_VSEL_table,
 		.enable_time_us = 100,
 	},
 	{
 		.name = "vmmc",
+		.vin_name = "vcc3",
 		.n_voltages = ARRAY_SIZE(VMMC_VSEL_table),
 		.voltage_table = VMMC_VSEL_table,
 		.enable_time_us = 100,
@@ -168,21 +181,25 @@ static struct tps_info tps65910_regs[] = {
 static struct tps_info tps65911_regs[] = {
 	{
 		.name = "vrtc",
+		.vin_name = "vcc7",
 		.enable_time_us = 2200,
 	},
 	{
 		.name = "vio",
+		.vin_name = "vccio",
 		.n_voltages = ARRAY_SIZE(VIO_VSEL_table),
 		.voltage_table = VIO_VSEL_table,
 		.enable_time_us = 350,
 	},
 	{
 		.name = "vdd1",
+		.vin_name = "vcc1",
 		.n_voltages = 73,
 		.enable_time_us = 350,
 	},
 	{
 		.name = "vdd2",
+		.vin_name = "vcc2",
 		.n_voltages = 73,
 		.enable_time_us = 350,
 	},
@@ -193,41 +210,49 @@ static struct tps_info tps65911_regs[] = {
 	},
 	{
 		.name = "ldo1",
+		.vin_name = "vcc6",
 		.n_voltages = 47,
 		.enable_time_us = 420,
 	},
 	{
 		.name = "ldo2",
+		.vin_name = "vcc6",
 		.n_voltages = 47,
 		.enable_time_us = 420,
 	},
 	{
 		.name = "ldo3",
+		.vin_name = "vcc5",
 		.n_voltages = 24,
 		.enable_time_us = 230,
 	},
 	{
 		.name = "ldo4",
+		.vin_name = "vcc5",
 		.n_voltages = 47,
 		.enable_time_us = 230,
 	},
 	{
 		.name = "ldo5",
+		.vin_name = "vcc4",
 		.n_voltages = 24,
 		.enable_time_us = 230,
 	},
 	{
 		.name = "ldo6",
+		.vin_name = "vcc3",
 		.n_voltages = 24,
 		.enable_time_us = 230,
 	},
 	{
 		.name = "ldo7",
+		.vin_name = "vcc3",
 		.n_voltages = 24,
 		.enable_time_us = 230,
 	},
 	{
 		.name = "ldo8",
+		.vin_name = "vcc3",
 		.n_voltages = 24,
 		.enable_time_us = 230,
 	},
@@ -1013,6 +1038,9 @@ static struct tps65910_board *tps65910_parse_dt_reg_data(
 	*tps65910_reg_matches = matches;
 
 	for (idx = 0; idx < count; idx++) {
+		struct tps_info *info = matches[idx].driver_data;
+		char in_supply[32]; /* 32 is max size of property name */
+
 		if (!matches[idx].init_data || !matches[idx].of_node)
 			continue;
 
@@ -1023,6 +1051,13 @@ static struct tps65910_board *tps65910_parse_dt_reg_data(
 				"ti,regulator-ext-sleep-control", &prop);
 		if (!ret)
 			pmic_plat_data->regulator_ext_sleep_control[idx] = prop;
+
+		if (info->vin_name) {
+			snprintf(in_supply, 32, "%s-supply", info->vin_name);
+			if (of_find_property(np, in_supply, 0))
+				pmic_plat_data->input_supply[idx] =
+								info->vin_name;
+		}
 	}
 
 	return pmic_plat_data;
@@ -1126,6 +1161,7 @@ static __devinit int tps65910_probe(struct platform_device *pdev)
 		pmic->info[i] = info;
 
 		pmic->desc[i].name = info->name;
+		pmic->desc[i].supply_name = pmic_plat_data->input_supply[i];
 		pmic->desc[i].id = i;
 		pmic->desc[i].n_voltages = info->n_voltages;
 		pmic->desc[i].enable_time = info->enable_time_us;

include/linux/mfd/tps65910.h

@@ -799,6 +799,7 @@ struct tps65910_sleep_keepon_data {
 /**
  * struct tps65910_board
  * Board platform data may be used to initialize regulators.
+ * @input_supply: Name of input supply regulator.
  */
 
 struct tps65910_board {
@@ -811,6 +812,7 @@ struct tps65910_board {
 	struct tps65910_sleep_keepon_data *slp_keepon;
 	bool en_gpio_sleep[TPS6591X_MAX_NUM_GPIO];
 	unsigned long regulator_ext_sleep_control[TPS65910_NUM_REGS];
+	const char *input_supply[TPS65910_NUM_REGS];
 	struct regulator_init_data *tps65910_pmic_init_data[TPS65910_NUM_REGS];
 };