[PATCH v4 3/6] dt-bindings: soc: qcom: Add RSC power domain specifier

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



In addition to transmitting resource state requests to the remote
processor, the RSC is responsible for powering off/lowering the
requirements from CPUs subsystem for the associated hardware like
buses, clocks, and regulators when all CPUs and cluster is powered down.

The power domain is configured to a low power state and when all the
CPUs are powered down, the RSC can lower resource state requirements
and power down the rails that power the CPUs.

Add PM domain specifier property for RSC controller.

Cc: devicetree@xxxxxxxxxxxxxxx
Signed-off-by: Maulik Shah <mkshah@xxxxxxxxxxxxxx>
Reviewed-by: Stephen Boyd <swboyd@xxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt b/Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt
index 9b86d1e..5682806 100644
--- a/Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt
+++ b/Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt
@@ -83,6 +83,14 @@ Properties:
 	Value type: <string>
 	Definition: Name for the RSC. The name would be used in trace logs.
 
+- #power-domain-cells:
+	Usage: optional
+	Value type: <u32>
+	Definition: Must be 0. Number of cells in power domain specifier.
+		    Optional for controllers that may be in 'solver' state
+		    where they can be in autonomous mode executing low power
+		    modes.
+
 Drivers that want to use the RSC to communicate with RPMH must specify their
 bindings as child nodes of the RSC controllers they wish to communicate with.
 
@@ -112,6 +120,7 @@ TCS-OFFSET: 0xD00
 				  <SLEEP_TCS   3>,
 				  <WAKE_TCS    3>,
 				  <CONTROL_TCS 1>;
+		#power-domain-cells = <0>;
 	};
 
 Example 2:
-- 
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]


  Powered by Linux