Document the GDSC nodes present within the multimedia clock
controller.
Cc: <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>
---
.../devicetree/bindings/clock/qcom,mmcc.txt | 42 ++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/Documentation/devicetree/bindings/clock/qcom,mmcc.txt
b/Documentation/devicetree/bindings/clock/qcom,mmcc.txt
index d572e9964c54..695f86ad94ea 100644
--- a/Documentation/devicetree/bindings/clock/qcom,mmcc.txt
+++ b/Documentation/devicetree/bindings/clock/qcom,mmcc.txt
@@ -19,3 +19,45 @@ Example:
#clock-cells = <1>;
#reset-cells = <1>;
};
+
+Qualcomm Global Distributed Switch Controller (GDSC) Binding
+------------------------------------------------------------
+
+The GDSC is responsible for safely collapsing and restoring power to
+peripheral cores on chipsets like msm8974 for power savings.
+
+Required properties:
+ - regulator-name: A string used as a descriptive name for regulator outputs
+
+Optional properties:
+ - parent-supply: phandle to the parent supply/regulator node
+ - qcom,retain-mem: Presence denotes a hardware requirement to leave the
+ forced core memory retention signals in the core's clock
+ branch control registers asserted.
+ - qcom,retain-periph: Presence denotes a hardware requirement to leave the
+ forced periph memory retention signal in the core's clock
+ branch control registers asserted.
+ - qcom,skip-logic-collapse: Presence denotes a requirement to leave power to
+ the core's logic enabled.
+ - qcom,support-hw-trigger: Presence denotes a hardware feature to switch
+ on/off this regulator based on internal HW signals
+ to save more power.
+
+Example:
+ clock-controller@4000000 {
+ compatible = "qcom,mmcc-msm8974";
+ reg = <0x4000000 0x1000>;
+ #clock-cells = <1>;
+ #reset-cells = <1>;
+
+ regulators {
+ gdsc_oxili_gx: gdsc_oxili_gx {
+ regulator-name = "gdsc_oxili_gx";
+ parent-supply = <&pm8841_s4>;
+ qcom,retain-mem;
+ qcom,retain-periph;
+ qcom,skip-logic-collapse;
+ qcom,support-hw-trigger;
+ };
+ };
+ };
--
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