linux-kernel - Re: [PATCH v2 2/4] arm64: dts: qcom: sm6350: Add camera clock controller

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Message-ID: <2989138a-8f4b-50a0-3e90-98b6785f2690@linaro.org>
Date:   Fri, 27 Jan 2023 12:49:07 +0000
From:   Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To:     Luca Weiss <luca.weiss@...rphone.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Loic Poulain <loic.poulain@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/4] arm64: dts: qcom: sm6350: Add camera clock
 controller

On 27/01/2023 12:45, Luca Weiss wrote:
> Can I reference <&camcc TITAN_TOP_GDSC> from itself? I know that having
> it on is required to turn on at least some clocks (maybe all clocks).
> But from what I understand how power domains are normally handled, the
> driver core enables them before the driver is probed, so self
> referencing wouldn't work.
> 
> And at least no other SoC upstream references TITAN_TOP_GDSC in camcc.
> 
> Regards
> Luca

Doh I meant to say a power-domain to an mmcx a la

power-domains = <&rpmhpd SM8250_MMCX>;
required-opps = <&rpmhpd_opp_low_svs>;

TITAN_TOP should be in your cci and camss dt nodes.

---
bod