linux-kernel - Re: [PATCH 2/8] arm64: dts: qcom: sc7180: Add specific APPS RSC compatible

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Message-ID: <881655b5-30c0-42f3-863f-5b6606a3e2cd@oss.qualcomm.com>
Date: Wed, 19 Mar 2025 15:14:42 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: Bjorn Andersson <andersson@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        cros-qcom-dts-watchers@...omium.org,
        Marc Gonzalez <mgonzalez@...ebox.fr>,
        Dmitry Baryshkov <lumag@...nel.org>, Arnaud Vrac <avrac@...ebox.fr>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/8] arm64: dts: qcom: sc7180: Add specific APPS RSC
 compatible

On 3/18/25 10:30 PM, Dmitry Baryshkov wrote:
> On Tue, Mar 18, 2025 at 07:35:15PM +0100, Konrad Dybcio wrote:
>> From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
>>
>> SC7180 comes in a couple firmware flavors, some of which don't support
>> PSCI in OSI mode. That prevents the power domain exepcted by the RSC
>> node from providing useful information on system power collapse.
> 
> Is this behaviour specific to SC7180 or only to ChromeBooks? For example
> TCL Book 14 Go or ECS Liva QC710, would they also use this compat?

The hardware and firmware representation of the RSC is identical, but
I wanted to alter the bindings required properties based on the specific
possibly-chrome platforms.

Konrad