[RFC,6/9] dt-bindings: opp: Add qcom-opp bindings with properties needed for CPR

Message ID 20190404050931.9812-7-niklas.cassel@linaro.org
State New
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  • Untitled series #19679
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Commit Message

Niklas Cassel April 4, 2019, 5:09 a.m.
Add qcom-opp bindings with properties needed for Core Power Reduction (CPR).

CPR is included in a great variety of Qualcomm SoC, e.g. msm8916 and msm8996,
and was first introduced in msm8974.

Co-developed-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>

Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org>

 .../devicetree/bindings/opp/qcom-opp.txt      | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/opp/qcom-opp.txt



diff --git a/Documentation/devicetree/bindings/opp/qcom-opp.txt b/Documentation/devicetree/bindings/opp/qcom-opp.txt
new file mode 100644
index 000000000000..d24280467db7
--- /dev/null
+++ b/Documentation/devicetree/bindings/opp/qcom-opp.txt
@@ -0,0 +1,24 @@ 
+Qualcomm OPP bindings to describe OPP nodes
+The bindings are based on top of the operating-points-v2 bindings
+described in Documentation/devicetree/bindings/opp/opp.txt
+Additional properties are described below.
+* OPP Table Node
+Required properties:
+- compatible: Allow OPPs to express their compatibility. It should be:
+  "operating-points-v2-qcom-level"
+* OPP Node
+Optional properties:
+- opp-hz: Frequency in Hz, expressed as a 64-bit big-endian integer. Even
+  though a power domain doesn't need a opp-hz, there can be devices in the
+  power domain that need to know the highest supported frequency for each
+  corner/level (e.g. CPR), in order to properly initialize the hardware.
+- qcom,opp-fuse-level: A positive value representing the fuse corner/level
+  associated with this OPP node. Sometimes several corners/levels shares
+  a certain fuse corner/level. A fuse corner/level contains e.g. ref uV,
+  min uV, and max uV.