[PATCH V5 3/3] OPP: Add binding for 'opp-suspend'

[Viresh Kumar <viresh.kumar@linaro.org>]

On few platforms, for power efficiency, we want the device to be
configured for a specific OPP while we put the device in suspend state.

Add an optional property in operating-points-v2 bindings for that.

Suggested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 Documentation/devicetree/bindings/power/opp.txt | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/power/opp.txt b/Documentation/devicetree/bindings/power/opp.txt
index 7f30d9b07db7..880f5e14b6e2 100644
--- a/Documentation/devicetree/bindings/power/opp.txt
+++ b/Documentation/devicetree/bindings/power/opp.txt
@@ -72,6 +72,8 @@ This describes the OPPs belonging to a device. This node can have following
   Missing property means devices have independent clock/voltage/current lines,
   but they share OPP tables.
 
+- opp-suspend: Phandle of the OPP to set while device is suspended.
+
 
 * OPP Node
 
@@ -143,9 +145,10 @@ Example 1: Single cluster Dual-core ARM cortex A9, switch DVFS states together.
 
 	cpu0_opp: opp0 {
 		compatible = "operating-points-v2";
+		opp-suspend = <&suspend_opp>;
 		opp-shared;
 
-		entry00 {
+		suspend-opp: entry00 {
 			opp-hz = <1000000000>;
 			opp-microvolt = <970000 975000 985000>;
 			opp-microamp = <70000>;
@@ -217,13 +220,14 @@ independently.
 
 	cpu0_opp: opp0 {
 		compatible = "operating-points-v2";
+		opp-suspend = <&suspend_opp>;
 
 		/*
 		 * Missing opp-shared property means CPUs switch DVFS states
 		 * independently.
 		 */
 
-		entry00 {
+		suspend-opp: entry00 {
 			opp-hz = <1000000000>;
 			opp-microvolt = <970000 975000 985000>;
 			opp-microamp = <70000>;
@@ -296,9 +300,10 @@ DVFS state together.
 
 	cluster0_opp: opp0 {
 		compatible = "operating-points-v2";
+		opp-suspend = <&suspend_opp0>;
 		opp-shared;
 
-		entry00 {
+		suspend-opp0: entry00 {
 			opp-hz = <1000000000>;
 			opp-microvolt = <970000 975000 985000>;
 			opp-microamp = <70000>;
@@ -321,9 +326,10 @@ DVFS state together.
 
 	cluster1_opp: opp1 {
 		compatible = "operating-points-v2";
+		opp-suspend = <&suspend_opp1>;
 		opp-shared;
 
-		entry10 {
+		suspend-opp1: entry10 {
 			opp-hz = <1300000000>;
 			opp-microvolt = <1045000 1050000 1055000>;
 			opp-microamp = <95000>;
-- 
2.4.0