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

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Message-ID: <68c3f24f-99a2-ad7c-9371-33ccaf5740dd@linaro.org>
Date:   Mon, 15 May 2023 15:08:24 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Dmitry Baryshkov <dmitry.baryshkov@...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 15.05.2023 14:57, Dmitry Baryshkov wrote:
> 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.
Hm, I don't see it neither on -next or in this patchset..

Konrad
> 
>>
>> 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>;
> 
> 
>