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@xxxxxx>
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
---
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
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