linux-kernel - Re: [PATCH v2 5/6] arm64: dts: qcom: sc8280xp: add resets for soundwire controllers

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Date:   Wed, 31 May 2023 22:03:30 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        andersson@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     johan+linaro@...nel.org, agross@...nel.org,
        konrad.dybcio@...aro.org, mturquette@...libre.com,
        sboyd@...nel.org, conor+dt@...nel.org,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 5/6] arm64: dts: qcom: sc8280xp: add resets for
 soundwire controllers

On 25/05/2023 14:29, Srinivas Kandagatla wrote:
> Soundwire controllers on sc8280xp needs an explicit reset, add
> support for this.
> 
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> ---
>  arch/arm64/boot/dts/qcom/sc8280xp.dtsi | 23 +++++++++++++++++++++++
>  1 file changed, 23 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> index 6730349e34f4..39be2e89ce05 100644
> --- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
> @@ -6,6 +6,7 @@
>  
>  #include <dt-bindings/clock/qcom,dispcc-sc8280xp.h>
>  #include <dt-bindings/clock/qcom,gcc-sc8280xp.h>
> +#include <dt-bindings/clock/qcom,lpasscc-sc8280xp.h>
>  #include <dt-bindings/clock/qcom,rpmh.h>
>  #include <dt-bindings/interconnect/qcom,osm-l3.h>
>  #include <dt-bindings/interconnect/qcom,sc8280xp.h>
> @@ -2560,6 +2561,8 @@
>  			interrupts = <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>;
>  			clocks = <&rxmacro>;
>  			clock-names = "iface";
> +			resets = <&lpass_audiocc LPASS_AUDIO_SWR_RX_CGCR>;
> +			reset-names = "swr_audio_cgcr";
>  			label = "RX";
>  
>  			qcom,din-ports = <0>;
> @@ -2634,6 +2637,8 @@
>  			interrupts = <GIC_SPI 170 IRQ_TYPE_LEVEL_HIGH>;
>  			clocks = <&wsamacro>;
>  			clock-names = "iface";
> +			resets = <&lpass_audiocc LPASS_AUDIO_SWR_WSA_CGCR>;
> +			reset-names = "swr_audio_cgcr";
>  			label = "WSA";
>  
>  			qcom,din-ports = <2>;
> @@ -2656,6 +2661,14 @@
>  			status = "disabled";
>  		};
>  
> +		lpass_audiocc: clock-controller@...9000 {
> +			compatible = "qcom,sc8280xp-lpassaudiocc";
> +			reg = <0 0x032a9000 0 0x1000>;
> +			qcom,adsp-pil-mode;

Here and...

> +			#clock-cells = <1>;
> +			#reset-cells = <1>;
> +		};
> +
>  		swr2: soundwire-controller@...0000 {
>  			compatible = "qcom,soundwire-v1.6.0";
>  			reg = <0 0x03330000 0 0x2000>;
> @@ -2665,6 +2678,8 @@
>  
>  			clocks = <&txmacro>;
>  			clock-names = "iface";
> +			resets = <&lpasscc LPASS_AUDIO_SWR_TX_CGCR>;
> +			reset-names = "swr_audio_cgcr";
>  			label = "TX";
>  			#sound-dai-cells = <1>;
>  			#address-cells = <2>;
> @@ -2901,6 +2916,14 @@
>  			};
>  		};
>  
> +		lpasscc: clock-controller@...0000 {
> +			compatible = "qcom,sc8280xp-lpasscc";
> +			reg = <0 0x033e0000 0 0x12000>;
> +			qcom,adsp-pil-mode;

... here - where do you use these properties? Driver ignores them.

AFAIR, these were only for sc7280 where we supported two variants for audio.

Best regards,
Krzysztof