[PATCH v10 1/9] dt-bindings: opp: Introduce opp-level bindings

[Rajendra Nayak]

On some SoCs (especially from Qualcomm and MediaTek) an OPP
node needs to describe an additional level/corner value
that is then communicated to a remote microprocessor by the CPU, which
then takes some actions (like adjusting voltage values across variousi
rails) based on the value passed.

Add opp-level as an additional property in the OPP node and describe it
in the OPP bindings document.

Signed-off-by: Rajendra Nayak <rnayak@xxxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/opp/opp.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/opp/opp.txt b/Documentation/devicetree/bindings/opp/opp.txt
index c396c4c0af92..e83fb7cbfd58 100644
--- a/Documentation/devicetree/bindings/opp/opp.txt
+++ b/Documentation/devicetree/bindings/opp/opp.txt
@@ -129,6 +129,11 @@ Optional properties:
 - opp-microamp-<name>: Named opp-microamp property. Similar to
   opp-microvolt-<name> property, but for microamp instead.
 
+- opp-level: On some SoC platforms an OPP node can describe a positive value
+  representing a corner/level that's communicated with a remote microprocessor
+  (usually called the power manager) which then translates it into a certain
+  voltage on a voltage rail.
+
 - clock-latency-ns: Specifies the maximum possible transition latency (in
   nanoseconds) for switching to this OPP from any other OPP.
 
-- 
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