linux-kernel - Re: [PATCH v2 1/4] arm64: dts: qcom: sm8450: move Soundwire pinctrl to its nodes

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Date:   Wed, 13 Dec 2023 17:45:32 +0100
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] arm64: dts: qcom: sm8450: move Soundwire pinctrl
 to its nodes

Le 13/12/2023 à 17:28, Krzysztof Kozlowski a écrit :
> Pin configuration for Soundwire bus should be set in Soundwire
> controller nodes, not in the associated macro codec node.  This
> placement change should not have big impact in general, because macro
> codec is a clock provider for Soundwire controller, thus its devices is
> probed first.  However it will have impact for disabled Soundwire buses,
> e.g. WSA2, because after this change the pins will be left in default
> state.
> 
> We also follow similar approach in newer SoCs, like Qualcomm SM8650.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> 
> ---
> 
> Not tested on HW.
> ---
>   arch/arm64/boot/dts/qcom/sm8450.dtsi | 20 ++++++++++++--------
>   1 file changed, 12 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8450.dtsi b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> index 12e55a0c7417..3b6ea9653d2a 100644
> --- a/arch/arm64/boot/dts/qcom/sm8450.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8450.dtsi
> @@ -2160,8 +2160,6 @@ wsa2macro: codec@...0000 {
>   
>   			#clock-cells = <0>;
>   			clock-output-names = "wsa2-mclk";
> -			pinctrl-names = "default";
> -			pinctrl-0 = <&wsa2_swr_active>;
>   			#sound-dai-cells = <1>;
>   		};
>   
> @@ -2173,6 +2171,9 @@ swr4: soundwire-controller@...0000 {
>   			clock-names = "iface";
>   			label = "WSA2";
>   
> +			pinctrl-0 = <&wsa2_swr_active>;
> +			pinctrl-names = "default";
> +
>   			qcom,din-ports = <2>;
>   			qcom,dout-ports = <6>;
>   
> @@ -2208,8 +2209,6 @@ rxmacro: codec@...0000 {
>   
>   			#clock-cells = <0>;
>   			clock-output-names = "mclk";
> -			pinctrl-names = "default";
> -			pinctrl-0 = <&rx_swr_active>;
>   			#sound-dai-cells = <1>;
>   		};
>   
> @@ -2223,6 +2222,9 @@ swr1: soundwire-controller@...0000 {
>   			qcom,din-ports = <0>;
>   			qcom,dout-ports = <5>;
>   
> +			pinctrl-0 = <&rx_swr_active>;
> +			pinctrl-names = "default";
> +
>   			qcom,ports-sinterval-low =	/bits/ 8 <0x03 0x1f 0x1f 0x07 0x00>;
>   			qcom,ports-offset1 =		/bits/ 8 <0x00 0x00 0x0b 0x01 0x00>;
>   			qcom,ports-offset2 =		/bits/ 8 <0x00 0x00 0x0b 0x00 0x00>;
> @@ -2254,8 +2256,6 @@ txmacro: codec@...0000 {
>   
>   			#clock-cells = <0>;
>   			clock-output-names = "mclk";
> -			pinctrl-names = "default";
> -			pinctrl-0 = <&tx_swr_active>;
>   			#sound-dai-cells = <1>;
>   		};
>   
> @@ -2275,8 +2275,6 @@ wsamacro: codec@...0000 {
>   
>   			#clock-cells = <0>;
>   			clock-output-names = "mclk";
> -			pinctrl-names = "default";
> -			pinctrl-0 = <&wsa_swr_active>;
>   			#sound-dai-cells = <1>;
>   		};
>   
> @@ -2288,6 +2286,9 @@ swr0: soundwire-controller@...0000 {
>   			clock-names = "iface";
>   			label = "WSA";
>   
> +			pinctrl-0 = <&wsa_swr_active>;
> +			pinctrl-names = "default";
> +
>   			qcom,din-ports = <2>;
>   			qcom,dout-ports = <6>;
>   
> @@ -2318,6 +2319,9 @@ swr2: soundwire-controller@...0000 {
>   			clock-names = "iface";
>   			label = "TX";
>   
> +			pinctrl-0 = <&tx_swr_active>;
> +			pinctrl-names = "default";
> +
>   			qcom,din-ports = <4>;
>   			qcom,dout-ports = <0>;
>   			qcom,ports-sinterval-low =	/bits/ 8 <0x01 0x01 0x03 0x03>;

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>