linux-kernel - Re: [PATCH v2 12/15] arm64: dts: qcom: sm6125: Switch fixed xo

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Date:   Thu, 29 Jun 2023 13:55:28 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Marijn Suijten <marijn.suijten@...ainline.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>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Krishna Manikandan <quic_mkrishn@...cinc.com>,
        Loic Poulain <loic.poulain@...aro.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Martin Botka <martin.botka@...ainline.org>,
        Jami Kettunen <jami.kettunen@...ainline.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Krzysztof Kozlowski <krzk@...nel.org>,
        linux-clk@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, Lux Aliaga <they@...t.lgbt>
Subject: Re: [PATCH v2 12/15] arm64: dts: qcom: sm6125: Switch fixed xo_board
 clock to RPM XO clock

On 27/06/2023 23:14, Marijn Suijten wrote:
> We have a working RPM XO clock; no other driver except rpmcc should be
> parenting directly to the fixed-factor xo_board clock nor should it be
> reachable by that global name.  Remove the name to that effect, so that
> every clock relation is explicitly defined in DTS.
> 
> Reviewed-by: Konrad Dybcio <konrad.dybcio@...aro.org>
> Signed-off-by: Marijn Suijten <marijn.suijten@...ainline.org>
> ---
>   arch/arm64/boot/dts/qcom/sm6125.dtsi | 7 ++++---
>   1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm6125.dtsi b/arch/arm64/boot/dts/qcom/sm6125.dtsi
> index 722dde560bec..edb03508dba3 100644
> --- a/arch/arm64/boot/dts/qcom/sm6125.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm6125.dtsi
> @@ -22,7 +22,6 @@ xo_board: xo-board {
>   			compatible = "fixed-clock";
>   			#clock-cells = <0>;
>   			clock-frequency = <19200000>;
> -			clock-output-names = "xo_board";

Why? I'd say, leave it.

With that fixed:

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

>   		};
>   
>   		sleep_clk: sleep-clk {
> @@ -306,6 +305,8 @@ rpm_requests: rpm-requests {
>   			rpmcc: clock-controller {
>   				compatible = "qcom,rpmcc-sm6125", "qcom,rpmcc";
>   				#clock-cells = <1>;
> +				clocks = <&xo_board>;
> +				clock-names = "xo";
>   			};
>   
>   			rpmpd: power-controller {
> @@ -713,7 +714,7 @@ sdhc_1: mmc@...4000 {
>   
>   			clocks = <&gcc GCC_SDCC1_AHB_CLK>,
>   				 <&gcc GCC_SDCC1_APPS_CLK>,
> -				 <&xo_board>;
> +				 <&rpmcc RPM_SMD_XO_CLK_SRC>;
>   			clock-names = "iface", "core", "xo";
>   			iommus = <&apps_smmu 0x160 0x0>;
>   
> @@ -740,7 +741,7 @@ sdhc_2: mmc@...4000 {
>   
>   			clocks = <&gcc GCC_SDCC2_AHB_CLK>,
>   				 <&gcc GCC_SDCC2_APPS_CLK>,
> -				 <&xo_board>;
> +				 <&rpmcc RPM_SMD_XO_CLK_SRC>;
>   			clock-names = "iface", "core", "xo";
>   			iommus = <&apps_smmu 0x180 0x0>;
>   
> 

-- 
With best wishes
Dmitry