linux-kernel - Re: [PATCH 03/11] arm64: dts: qcom: sc7280: Move qfprom clock to chrome-common

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Date:   Thu, 31 Aug 2023 13:28:01 +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 03/11] arm64: dts: qcom: sc7280: Move qfprom clock to
 chrome-common

On Wed Aug 30, 2023 at 12:09 PM CEST, Konrad Dybcio wrote:
> On 30.08.2023 11:58, Luca Weiss wrote:
> > On non-ChromeOS boards the clock cannot be touched, so move it in the
> > chrome-common dtsi which is the only place where it's needed.
> > 
> > Signed-off-by: Luca Weiss <luca.weiss@...rphone.com>
> > ---
> If that clock is not registered (e.g. it's in protected-clocks = <>,
> would the _optional handler not handle it just fine?

Right, that appears to work!

~ # ls -d /sys/bus/platform/drivers/qcom,qfprom/*.efuse
/sys/bus/platform/drivers/qcom,qfprom/784000.efuse
~ # cat /sys/firmware/devicetree/base/soc@...fuse@...000/clock-names; echo
core
~ # hexdump -C /sys/firmware/devicetree/base/soc@...fuse@...000/clocks
00000000  00 00 00 03 00 00 00 b8                           |........|
00000008

Never tested this case before, but since it appears to work with the
patched qfprom driver (other patch in this series) I think we can drop
this patch.
Will also have to adjust some other patches in my local tree then that
do similar things ;)

Regards
Luca

>
> Konrad