linux-kernel - Re: [PATCH 4/4] arm64: dts: qcom: sm8550: Add video clock controller

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Message-ID: <CAA8EJpo1iMj90BPc6gYngSrJqd8WWArRndgbcVg1fYBKBpVfAQ@mail.gmail.com>
Date:   Mon, 15 May 2023 15:57:52 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>
Cc:     Jagadeesh Kona <quic_jkona@...cinc.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Taniya Das <quic_tdas@...cinc.com>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] arm64: dts: qcom: sm8550: Add video clock controller

On Mon, 15 May 2023 at 15:28, Konrad Dybcio <konrad.dybcio@...aro.org> wrote:
>
>
>
> On 9.05.2023 18:12, Jagadeesh Kona wrote:
> > Add device node for video clock controller on Qualcomm SM8550 platform.
> >
> > Signed-off-by: Jagadeesh Kona <quic_jkona@...cinc.com>
> > Signed-off-by: Taniya Das <quic_tdas@...cinc.com>
> > ---
> >  arch/arm64/boot/dts/qcom/sm8550.dtsi | 12 ++++++++++++
> >  1 file changed, 12 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> > index 6e9bad8f6f33..e67e7c69dae6 100644
> > --- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
> > +++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> > @@ -7,6 +7,7 @@
> >  #include <dt-bindings/clock/qcom,sm8550-gcc.h>
> >  #include <dt-bindings/clock/qcom,sm8550-tcsr.h>
> >  #include <dt-bindings/clock/qcom,sm8550-dispcc.h>
> > +#include <dt-bindings/clock/qcom,sm8550-videocc.h>
> >  #include <dt-bindings/dma/qcom-gpi.h>
> >  #include <dt-bindings/gpio/gpio.h>
> >  #include <dt-bindings/interrupt-controller/arm-gic.h>
> > @@ -759,6 +760,17 @@ gcc: clock-controller@...000 {
> >                                <&usb_dp_qmpphy QMP_USB43DP_USB3_PIPE_CLK>;
> >               };
> >
> > +             videocc: clock-controller@...0000 {
> This node should be moved down. Nodes with unit addresses
> should be sorted alphanumerically.
>
> > +                     compatible = "qcom,sm8550-videocc";
> > +                     reg = <0 0x0aaf0000 0 0x10000>;
> > +                     clocks = <&bi_tcxo_div2>, <&gcc GCC_VIDEO_AHB_CLK>;
> One per line, please
>
> Also, any reason the XO clock does not come from RPMhCC?

bi_tcxo_div_2 is an RPMhCC clock with the fixed divider.

>
> Konrad
> > +                     power-domains = <&rpmhpd SM8550_MMCX>;
> > +                     required-opps = <&rpmhpd_opp_low_svs>;
> > +                     #clock-cells = <1>;
> > +                     #reset-cells = <1>;
> > +                     #power-domain-cells = <1>;
> > +             };
> > +
> >               ipcc: mailbox@...000 {
> >                       compatible = "qcom,sm8550-ipcc", "qcom,ipcc";
> >                       reg = <0 0x00408000 0 0x1000>;



-- 
With best wishes
Dmitry