linux-kernel - Re: [PATCH] arm64: dts: qcom: sm6115: Add EUD dt node and dwc3 connector

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Message-ID: <514482a4-614c-d6b8-ec7c-0e69fff72295@linaro.org>
Date:   Mon, 2 Jan 2023 11:46:03 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bhupesh Sharma <bhupesh.sharma@...aro.org>,
        linux-arm-msm@...r.kernel.org
Cc:     quic_schowdhu@...cinc.com, agross@...nel.org, andersson@...nel.org,
        linux-kernel@...r.kernel.org, bhupesh.linux@...il.com,
        robh+dt@...nel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: qcom: sm6115: Add EUD dt node and dwc3
 connector



On 31.12.2022 14:19, Bhupesh Sharma wrote:
> Add the Embedded USB Debugger(EUD) device tree node for
> SM6115 / SM4250 SoC.
> 
> The node contains EUD base register region and EUD mode
> manager register regions along with the interrupt entry.
> 
> Also add the typec connector node for EUD which is attached to
> EUD node via port. EUD is also attached to DWC3 node via port.
> 
> Cc: Souradeep Chowdhury <quic_schowdhu@...cinc.com>
> Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
> ---
> - This patch is based on my earlier sm6115 usb related changes, which can
>   be seen here:
>   https://lore.kernel.org/linux-arm-msm/20221215094532.589291-1-bhupesh.sharma@linaro.org/
> - This patch is also dependent on my sm6115 eud dt-binding and driver changes
>   sent earlier, which can be seen here:
>   https://lore.kernel.org/linux-arm-msm/20221231130743.3285664-1-bhupesh.sharma@linaro.org/
> 
>  arch/arm64/boot/dts/qcom/sm6115.dtsi | 37 ++++++++++++++++++++++++++++
>  1 file changed, 37 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm6115.dtsi b/arch/arm64/boot/dts/qcom/sm6115.dtsi
> index 030763187cc3f..c775f7fdb7015 100644
> --- a/arch/arm64/boot/dts/qcom/sm6115.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm6115.dtsi
> @@ -565,6 +565,37 @@ gcc: clock-controller@...0000 {
>  			#power-domain-cells = <1>;
>  		};
>  
> +		eud: eud@...0000 {
> +			compatible = "qcom,sm6115-eud","qcom,eud";
Missing space between entries.

> +			reg = <0x01610000 0x2000>,
> +			      <0x01612000 0x1000>,
> +			      <0x003e5018 0x4>;
> +			interrupts = <GIC_SPI 189 IRQ_TYPE_LEVEL_HIGH>;
> +			ports {
Newline before ports {}.

Not sure if debugging hardware should be enabled by default..
> +				port@0 {
> +					eud_ep: endpoint {
> +						remote-endpoint = <&usb2_role_switch>;
> +					};
> +				};
Newline between subsequent nodes.

> +				port@1 {
> +					eud_con: endpoint {
> +						remote-endpoint = <&con_eud>;
> +					};
> +				};
> +			};
> +		};
> +
> +		eud_typec: connector {
Non-MMIO nodes don't belong under /soc.

> +			compatible = "usb-c-connector";
Newline between properties and subnode.


> +			ports {
> +				port@0 {
> +					con_eud: endpoint {
> +						remote-endpoint = <&eud_con>;
> +					};
> +				};
> +			};
> +		};
> +
>  		usb_hsphy: phy@...3000 {
>  			compatible = "qcom,sm6115-qusb2-phy";
>  			reg = <0x01613000 0x180>;
> @@ -1064,6 +1095,12 @@ usb_dwc3: usb@...0000 {
>  				snps,has-lpm-erratum;
>  				snps,hird-threshold = /bits/ 8 <0x10>;
>  				snps,usb3_lpm_capable;
> +				usb-role-switch;
Same here.

On a note, this commit + driver-side changes give me a:

1610000.eud     qcom_eud: failed to get role switch

Konrad
> +				port {
> +					usb2_role_switch: endpoint {
> +						remote-endpoint = <&eud_ep>;
> +					};
> +				};
>  			};
>  		};
>