regulator: tps6586x: add support for SYS rail

Device have SYS rail which is always ON. It is system power bus. LDO5
and LDO_RTC get powered through this rail internally. Add support for
this rail and make the LDO5/LDO_RTC supply by it. Update document
accordingly.

[swarren: Instantiate the sys regulator from board-harmony-power.c to
 avoid regression.]

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

1 files changed, 39 insertions, 26 deletions

diff --git a/Documentation/devicetree/bindings/regulator/tps6586x.txt b/Documentation/devicetree/bindings/regulator/tps6586x.txt
index da80c2ae091..a2436e1edfc 100644
--- a/Documentation/devicetree/bindings/regulator/tps6586x.txt
+++ b/Documentation/devicetree/bindings/regulator/tps6586x.txt
@@ -8,7 +8,8 @@ Required properties:
 - gpio-controller: mark the device as a GPIO controller
 - regulators: list of regulators provided by this controller, must have
   property "regulator-compatible" to match their hardware counterparts:
-  sm[0-2], ldo[0-9] and ldo_rtc
+  sys, sm[0-2], ldo[0-9] and ldo_rtc
+- sys-supply: The input supply for SYS.
 - vin-sm0-supply: The input supply for the SM0.
 - vin-sm1-supply: The input supply for the SM1.
 - vin-sm2-supply: The input supply for the SM2.
@@ -20,6 +21,9 @@ Required properties:
 
 Each regulator is defined using the standard binding for regulators.
 
+Note: LDO5 and LDO_RTC is supplied by SYS regulator internally and driver
+      take care of making proper parent child relationship.
+
 Example:
 
 	pmu: tps6586x@34 {
@@ -30,6 +34,7 @@ Example:
 		#gpio-cells = <2>;
 		gpio-controller;
 
+		sys-supply = <&some_reg>;
 		vin-sm0-supply = <&some_reg>;
 		vin-sm1-supply = <&some_reg>;
 		vin-sm2-supply = <&some_reg>;
@@ -43,8 +48,16 @@ Example:
 			#address-cells = <1>;
 			#size-cells = <0>;
 
-			sm0_reg: regulator@0 {
+			sys_reg: regulator@0 {
 				reg = <0>;
+				regulator-compatible = "sys";
+				regulator-name = "vdd_sys";
+				regulator-boot-on;
+				regulator-always-on;
+			};
+
+			sm0_reg: regulator@1 {
+				reg = <1>;
 				regulator-compatible = "sm0";
 				regulator-min-microvolt = < 725000>;
 				regulator-max-microvolt = <1500000>;
@@ -52,8 +65,8 @@ Example:
 				regulator-always-on;
 			};
 
-			sm1_reg: regulator@1 {
-				reg = <1>;
+			sm1_reg: regulator@2 {
+				reg = <2>;
 				regulator-compatible = "sm1";
 				regulator-min-microvolt = < 725000>;
 				regulator-max-microvolt = <1500000>;
@@ -61,8 +74,8 @@ Example:
 				regulator-always-on;
 			};
 
-			sm2_reg: regulator@2 {
-				reg = <2>;
+			sm2_reg: regulator@3 {
+				reg = <3>;
 				regulator-compatible = "sm2";
 				regulator-min-microvolt = <3000000>;
 				regulator-max-microvolt = <4550000>;
@@ -70,72 +83,72 @@ Example:
 				regulator-always-on;
 			};
 
-			ldo0_reg: regulator@3 {
-				reg = <3>;
+			ldo0_reg: regulator@4 {
+				reg = <4>;
 				regulator-compatible = "ldo0";
 				regulator-name = "PCIE CLK";
 				regulator-min-microvolt = <3300000>;
 				regulator-max-microvolt = <3300000>;
 			};
 
-			ldo1_reg: regulator@4 {
-				reg = <4>;
+			ldo1_reg: regulator@5 {
+				reg = <5>;
 				regulator-compatible = "ldo1";
 				regulator-min-microvolt = < 725000>;
 				regulator-max-microvolt = <1500000>;
 			};
 
-			ldo2_reg: regulator@5 {
-				reg = <5>;
+			ldo2_reg: regulator@6 {
+				reg = <6>;
 				regulator-compatible = "ldo2";
 				regulator-min-microvolt = < 725000>;
 				regulator-max-microvolt = <1500000>;
 			};
 
-			ldo3_reg: regulator@6 {
-				reg = <6>;
+			ldo3_reg: regulator@7 {
+				reg = <7>;
 				regulator-compatible = "ldo3";
 				regulator-min-microvolt = <1250000>;
 				regulator-max-microvolt = <3300000>;
 			};
 
-			ldo4_reg: regulator@7 {
-				reg = <7>;
+			ldo4_reg: regulator@8 {
+				reg = <8>;
 				regulator-compatible = "ldo4";
 				regulator-min-microvolt = <1700000>;
 				regulator-max-microvolt = <2475000>;
 			};
 
-			ldo5_reg: regulator@8 {
-				reg = <8>;
+			ldo5_reg: regulator@9 {
+				reg = <9>;
 				regulator-compatible = "ldo5";
 				regulator-min-microvolt = <1250000>;
 				regulator-max-microvolt = <3300000>;
 			};
 
-			ldo6_reg: regulator@9 {
-				reg = <9>;
+			ldo6_reg: regulator@10 {
+				reg = <10>;
 				regulator-compatible = "ldo6";
 				regulator-min-microvolt = <1250000>;
 				regulator-max-microvolt = <3300000>;
 			};
 
-			ldo7_reg: regulator@10 {
-				reg = <10>;
+			ldo7_reg: regulator@11 {
+				reg = <11>;
 				regulator-compatible = "ldo7";
 				regulator-min-microvolt = <1250000>;
 				regulator-max-microvolt = <3300000>;
 			};
 
-			ldo8_reg: regulator@11 {
-				reg = <11>;
+			ldo8_reg: regulator@12 {
+				reg = <12>;
 				regulator-compatible = "ldo8";
 				regulator-min-microvolt = <1250000>;
 				regulator-max-microvolt = <3300000>;
 			};
 
-			ldo9_reg: regulator@12 {
-				reg = <12>;
+			ldo9_reg: regulator@13 {
+				reg = <13>;
 				regulator-compatible = "ldo9";
 				regulator-min-microvolt = <1250000>;
 				regulator-max-microvolt = <3300000>;