soc: qcom: Add RPM SMD Driver
This is a snapshot of the RPM-SMD driver functionality as of
'commit 9c23726ad4df ("leds: qpnp-flash: Fix 11
Use-after-free(UAF) for debugfs")' on msm-4.4 branch.
Change-Id: I502300cf26b67679a9344a89b2feaa0dbcc5fb59
Signed-off-by: Raju P.L.S.S.S.N <rplsssn@codeaurora.org>
diff --git a/Documentation/devicetree/bindings/arm/msm/rpm-smd.txt b/Documentation/devicetree/bindings/arm/msm/rpm-smd.txt
new file mode 100644
index 0000000..4cba3ec
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/msm/rpm-smd.txt
@@ -0,0 +1,41 @@
+Resource Power Manager(RPM)
+
+RPM is a dedicated hardware engine for managing shared SoC resources,
+which includes buses, clocks, power rails, etc. The goal of RPM is
+to achieve the maximum power savings while satisfying the SoC's
+operational and performance requirements. RPM accepts resource
+requests from multiple RPM masters. It arbitrates and aggregates the
+requests, and configures the shared resources. The RPM masters are
+the application processor, the modem processor, as well as hardware
+accelerators. The RPM driver communicates with the hardware engine using
+SMD.
+
+The devicetree representation of the SPM block should be:
+
+Required properties
+
+- compatible: "qcom,rpm-smd" or "qcom,rpm-glink"
+- rpm-channel-name: The string corresponding to the channel name of the
+ peripheral subsystem. Required for both smd and
+ glink transports.
+- rpm-channel-type: The interal SMD edge for this subsystem found in
+ <soc/qcom/smd.h>
+- qcom,glink-edge: Logical name of the remote subsystem. This is a required
+ property when rpm-smd driver using glink as trasport.
+
+Optional properties
+- rpm-standalone: Allow RPM driver to run in standalone mode irrespective of RPM
+ channel presence.
+- reg: Contains the memory address at which rpm messaging format version is
+ stored. If this field is not present, the target only supports v0 format.
+
+Example:
+
+ qcom,rpm-smd@68150 {
+ compatible = "qcom,rpm-smd", "qcom,rpm-glink";
+ reg = <0x68150 0x3200>;
+ qcom,rpm-channel-name = "rpm_requests";
+ qcom,rpm-channel-type = 15; /* SMD_APPS_RPM */
+ qcom,glink-edge = "rpm";
+ }
+}