From: Maulik Shah <mkshah@codeaurora.org>
To: Rob Herring <robh@kernel.org>
Cc: swboyd@chromium.org, agross@kernel.org, david.brown@linaro.org,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-pm@vger.kernel.org, bjorn.andersson@linaro.org,
evgreen@chromium.org, dianders@chromium.org,
rnayak@codeaurora.org, ilina@codeaurora.org,
lsrao@codeaurora.org, ulf.hansson@linaro.org,
devicetree@vger.kernel.org
Subject: Re: [PATCH v2 3/6] dt-bindings: soc: qcom: Add RSC power domain specifier
Date: Tue, 3 Sep 2019 14:14:17 +0530 [thread overview]
Message-ID: <6002b812-b575-85c7-41a4-2b9a200b4ff3@codeaurora.org> (raw)
In-Reply-To: <20190827223252.GA26039@bogus>
On 8/28/2019 4:02 AM, Rob Herring wrote:
> 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@vger.kernel.org
>> Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
>> Reviewed-by: Stephen Boyd <swboyd@chromium.org>
>> ---
>> 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?
yes. its value is always 0. i will update definition to mention this in
next version.
>> +
>> 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.
>>
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
next prev parent reply other threads:[~2019-09-03 8:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-23 8:16 [PATCH v2 0/6] Add RSC power domain support Maulik Shah
2019-08-23 8:16 ` [PATCH v2 1/6] drivers: qcom: rpmh: fix macro to accept NULL argument Maulik Shah
2019-08-23 8:16 ` [PATCH v2 2/6] drivers: qcom: rpmh: remove rpmh_flush export Maulik Shah
2019-08-23 8:17 ` [PATCH v2 3/6] dt-bindings: soc: qcom: Add RSC power domain specifier Maulik Shah
2019-08-27 22:32 ` Rob Herring
2019-09-03 8:44 ` Maulik Shah [this message]
2019-08-23 8:17 ` [PATCH v2 4/6] drivers: qcom: rpmh-rsc: Add RSC power domain support Maulik Shah
2019-09-05 17:32 ` Stephen Boyd
2020-02-03 13:11 ` Maulik Shah
2019-08-23 8:17 ` [PATCH v2 5/6] arm64: dts: Convert to the hierarchical CPU topology layout for sdm845 Maulik Shah
2019-08-23 8:17 ` [PATCH v2 6/6] arm64: dts: Add rsc power domain " Maulik Shah
2019-09-05 17:33 ` Stephen Boyd
2020-01-21 19:05 ` [PATCH v2 0/6] Add RSC power domain support Matthias Kaehlcke
2020-01-25 15:36 ` Maulik Shah
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