summaryrefslogtreecommitdiffstats
path: root/Documentation/devicetree/bindings/clock/qcom,rpmcc.txt
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/devicetree/bindings/clock/qcom,rpmcc.txt')
-rw-r--r--Documentation/devicetree/bindings/clock/qcom,rpmcc.txt49
1 files changed, 49 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/clock/qcom,rpmcc.txt b/Documentation/devicetree/bindings/clock/qcom,rpmcc.txt
new file mode 100644
index 000000000..4491d1c10
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/qcom,rpmcc.txt
@@ -0,0 +1,49 @@
+Qualcomm RPM Clock Controller Binding
+------------------------------------------------
+The RPM is a dedicated hardware engine for managing the shared
+SoC resources in order to keep the lowest power profile. It
+communicates with other hardware subsystems via shared memory
+and accepts clock requests, aggregates the requests and turns
+the clocks on/off or scales them on demand.
+
+Required properties :
+- compatible : shall contain only one of the following. The generic
+ compatible "qcom,rpmcc" should be also included.
+
+ "qcom,rpmcc-msm8660", "qcom,rpmcc"
+ "qcom,rpmcc-apq8060", "qcom,rpmcc"
+ "qcom,rpmcc-msm8916", "qcom,rpmcc"
+ "qcom,rpmcc-msm8974", "qcom,rpmcc"
+ "qcom,rpmcc-apq8064", "qcom,rpmcc"
+ "qcom,rpmcc-msm8996", "qcom,rpmcc"
+
+- #clock-cells : shall contain 1
+
+The clock enumerators are defined in <dt-bindings/clock/qcom,rpmcc.h>
+and come in pairs: FOO_CLK followed by FOO_A_CLK. The latter clock
+is an "active" clock, which means that the consumer only care that the
+clock is available when the apps CPU subsystem is active, i.e. not
+suspended or in deep idle. If it is important that the clock keeps running
+during system suspend, you need to specify the non-active clock, the one
+not containing *_A_* in the enumerator name.
+
+Example:
+ smd {
+ compatible = "qcom,smd";
+
+ rpm {
+ interrupts = <0 168 1>;
+ qcom,ipc = <&apcs 8 0>;
+ qcom,smd-edge = <15>;
+
+ rpm_requests {
+ compatible = "qcom,rpm-msm8916";
+ qcom,smd-channels = "rpm_requests";
+
+ rpmcc: clock-controller {
+ compatible = "qcom,rpmcc-msm8916", "qcom,rpmcc";
+ #clock-cells = <1>;
+ };
+ };
+ };
+ };