On Fri, Aug 23, 2019 at 01:47:00PM +0530, Maulik Shah wrote: > 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 | 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. What's the value? It's always 0? > + > 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: > -- > QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation. >
