regulator: of: add support for adding consumer list from DT

To support the regulator registration through DT and consumer
from non-dt, add support for adding consumer list through DT
so that non-dt driver can get their regulator in normal way
without modifying anything on client driver.

Change-Id: I7d3ca0994b1d5c28767b956df4c3eb861eec2af4
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/275794

1 files changed, 53 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/regulator/regulator.txt b/Documentation/devicetree/bindings/regulator/regulator.txt
index 713f9b247cb3..0fd87f3f5ad4 100644
--- a/Documentation/devicetree/bindings/regulator/regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/regulator.txt
@@ -20,6 +20,27 @@ Deprecated properties:
   this child node is intended to configure. If this property is missing,
   the node's name will be used instead.
 
+Consumer name support from DT:
+To support the consumer list of the rails from DT to map the power tree
+so that driver who uses the regualtor can still be non-dt, adding following
+properties.
+The consumer list will be provided under subnode of each regualtor called
+"consumer". The consumer list has the supply name and device name. This can
+be set with properties:
+regulator-consumer-supply: Consumer supply name.
+regulator-consumer-device: Consumer device name.
+The properties will be passed as
+	consumers {
+		c1 {
+			regulator-consumer-supply = "vana";
+			regulator-consumer-device = "2-0010";
+		};
+
+		c2 {
+			regulator-consumer-supply = "vana";
+			regulator-consumer-device = "2-0036";
+		};
+
 Example:
 
 	xyzreg: regulator@0 {
@@ -61,3 +82,35 @@ regulators (twl_reg1 and twl_reg2),
 		vmmc-supply = <&twl_reg1>;
 		vmmcaux-supply = <&twl_reg2>;
 	};
+
+
+Example: Consumer list from DT
+	ldo3 {
+		regulator-name = "vdd_rtc";
+		regulator-min-microvolt = <800000>;
+		regulator-max-microvolt = <800000>;
+		regulator-always-on;
+		ams,enable-tracking;
+		consumers {
+			c1 {
+				regulator-consumer-supply = "vdd_rtc";
+			};
+		};
+	};
+
+	ldo4 {
+		regulator-name = "avdd_cam";
+		regulator-min-microvolt = <2700000>;
+		regulator-max-microvolt = <2700000>;
+		regulator-always-on;
+		consumers {
+			c1 {
+				regulator-consumer-supply = "vana";
+				regulator-consumer-device = "2-0010";
+			};
+			c2 {
+				regulator-consumer-supply = "vana";
+				regulator-consumer-device = "2-0036";
+			};
+		};
+	};