linux-kernel - Re: [PATCH V4 4/4] arm64: dts: qcom: sm8550: Add camera clock controller

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Message-ID: <8d1ead23-8361-7943-baba-baf20d16cbe5@linaro.org>
Date:   Fri, 9 Jun 2023 14:52:48 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Jagadeesh Kona <quic_jkona@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc:     Bjorn Andersson <andersson@...nel.org>,
        Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Taniya Das <quic_tdas@...cinc.com>,
        Satya Priya Kakitapalli <quic_skakitap@...cinc.com>,
        Imran Shaik <quic_imrashai@...cinc.com>,
        Ajit Pandey <quic_ajipan@...cinc.com>
Subject: Re: [PATCH V4 4/4] arm64: dts: qcom: sm8550: Add camera clock
 controller



On 9.06.2023 13:50, Jagadeesh Kona wrote:
> Add device node for camera clock controller on Qualcomm
> SM8550 platform.
> 
> Signed-off-by: Taniya Das <quic_tdas@...cinc.com>
> Signed-off-by: Jagadeesh Kona <quic_jkona@...cinc.com>
> ---
> Changes since V3:
>  - No changes
> Changes since V2:
>  - No changes
> Changes since V1:
>  - Padded non-zero address part to 8 hex digits
> 
>  arch/arm64/boot/dts/qcom/sm8550.dtsi | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8550.dtsi b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> index 75cd374943eb..4d2d610fc66a 100644
> --- a/arch/arm64/boot/dts/qcom/sm8550.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8550.dtsi
> @@ -5,6 +5,7 @@
>  
>  #include <dt-bindings/clock/qcom,rpmh.h>
>  #include <dt-bindings/clock/qcom,sm8450-videocc.h>
> +#include <dt-bindings/clock/qcom,sm8550-camcc.h>
>  #include <dt-bindings/clock/qcom,sm8550-gcc.h>
>  #include <dt-bindings/clock/qcom,sm8550-gpucc.h>
>  #include <dt-bindings/clock/qcom,sm8550-tcsr.h>
> @@ -2419,6 +2420,20 @@ videocc: clock-controller@...0000 {
>  			#power-domain-cells = <1>;
>  		};
>  
> +		camcc: clock-controller@...0000 {
> +			compatible = "qcom,sm8550-camcc";
> +			reg = <0 0x0ade0000 0 0x20000>;
> +			clocks = <&gcc GCC_CAMERA_AHB_CLK>,
> +				 <&bi_tcxo_div2>,
> +				 <&bi_tcxo_ao_div2>,
> +				 <&sleep_clk>;
> +			power-domains = <&rpmhpd SM8550_MMCX>;
I see that both MMCX ("mmcx.lvl") and MXC ("mxc.lvl") (and MX, FWIW)
are consumed on msm-5.15, with the latter one powering camcc PLLs..

How are they related? Is that resolved internally or does it need
manual intervention?

Konrad
> +			required-opps = <&rpmhpd_opp_low_svs>;
> +			#clock-cells = <1>;
> +			#reset-cells = <1>;
> +			#power-domain-cells = <1>;
> +		};
> +
>  		mdss: display-subsystem@...0000 {
>  			compatible = "qcom,sm8550-mdss";
>  			reg = <0 0x0ae00000 0 0x1000>;