linux-kernel - Re: [PATCH 01/11] arm64: dts: qcom: sc7280: Mark some nodes as 'reserved'

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Date:   Wed, 30 Aug 2023 12:35:09 +0200
From:   "Luca Weiss" <luca.weiss@...rphone.com>
To:     "Konrad Dybcio" <konrad.dybcio@...aro.org>,
        <cros-qcom-dts-watchers@...omium.org>,
        "Andy Gross" <agross@...nel.org>,
        "Bjorn Andersson" <andersson@...nel.org>,
        "Rob Herring" <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        "Conor Dooley" <conor+dt@...nel.org>,
        "Srinivas Kandagatla" <srinivas.kandagatla@...aro.org>,
        "Linus Walleij" <linus.walleij@...aro.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        "Viresh Kumar" <viresh.kumar@...aro.org>
Cc:     <~postmarketos/upstreaming@...ts.sr.ht>,
        <phone-devel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-gpio@...r.kernel.org>, <linux-pm@...r.kernel.org>
Subject: Re: [PATCH 01/11] arm64: dts: qcom: sc7280: Mark some nodes as
 'reserved'

On Wed Aug 30, 2023 at 12:08 PM CEST, Konrad Dybcio wrote:
> On 30.08.2023 11:58, Luca Weiss wrote:
> > With the standard Qualcomm TrustZone setup, components such as lpasscc,
> > pdc_reset and watchdog shouldn't be touched by Linux. Mark them with
> > the status 'reserved' and reeable them in the chrome-common dtsi.
> > 
> > Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
> > ---
> Could probably use /* Owned by ADSP firmware */ or /* Owned by Gunyah hyp */

Do you know which one is more fitting for these nodes? I don't really
have a reference to if the ADSP or Gunyah (is this even used here?) owns
this.

Regards
Luca

>
> the change lgtm though
>
> Konrad