2019-08-13 08:28:00

by Maulik Shah

Subject: [PATCH 3/4] dt-bindings: soc: qcom: Add RSC power domain specifier

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: [email protected]
Signed-off-by: Maulik Shah <[email protected]>
---
Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt | 8 ++++++++
1 file changed, 8 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt b/Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt
index 9b86d1eff219..d0ab6e9b6745 100644
--- a/Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt
+++ b/Documentation/devicetree/bindings/soc/qcom/rpmh-rsc.txt
@@ -83,6 +83,13 @@ 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: 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 +119,7 @@ TCS-OFFSET: 0xD00
<SLEEP_TCS 3>,
<WAKE_TCS 3>,
<CONTROL_TCS 1>;
+ #power-domain-cells = <0>;
};

Example 2:
--
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2019-08-14 18:04:12

by Stephen Boyd

Subject: Re: [PATCH 3/4] dt-bindings: soc: qcom: Add RSC power domain specifier

Quoting Maulik Shah (2019-08-13 01:24:41)
> 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: [email protected]
> Signed-off-by: Maulik Shah <[email protected]>
> ---

Reviewed-by: Stephen Boyd <[email protected]>