linux-kernel - Re: [PATCH v4 7/8] arm64: dts: qcom: ipq9574: Add USB related nodes

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Message-ID: <e5d4663f-c816-4789-a63c-5d6ce4744692@linaro.org>
Date:   Tue, 28 Mar 2023 09:09:09 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Varadarajan Narayanan <quic_varada@...cinc.com>, agross@...nel.org,
        andersson@...nel.org, konrad.dybcio@...aro.org, vkoul@...nel.org,
        kishon@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, gregkh@...uxfoundation.org,
        mturquette@...libre.com, sboyd@...nel.org, quic_wcheng@...cinc.com,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-usb@...r.kernel.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH v4 7/8] arm64: dts: qcom: ipq9574: Add USB related nodes

On 27/03/2023 11:30, Varadarajan Narayanan wrote:
> Add USB phy and controller related nodes
> 
> Signed-off-by: Varadarajan Narayanan <quic_varada@...cinc.com>
> ---
>  Changes in v4:
> 	- Use newer bindings without subnodes
> 	- Fix coding style issues
> 
>  Changes in v3:
> 	- Insert the nodes at proper location
> 
>  Changes in v2:
> 	- Fixed issues flagged by Krzysztof
> 	- Fix issues reported by make dtbs_check
> 	- Remove NOC related clocks (to be added with proper
> 	  interconnect support)
> ---
>  arch/arm64/boot/dts/qcom/ipq9574.dtsi | 83 +++++++++++++++++++++++++++++++++++
>  1 file changed, 83 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> index 2bb4053..5379c25 100644
> --- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> +++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> @@ -215,6 +215,45 @@
>  		#size-cells = <1>;
>  		ranges = <0 0 0 0xffffffff>;
>  
> +		qusb_phy_0: phy@...00 {
> +			compatible = "qcom,ipq9574-qusb2-phy";
> +			reg = <0x0007b000 0x180>;
> +			#phy-cells = <0>;
> +
> +			clocks = <&gcc GCC_USB0_PHY_CFG_AHB_CLK>,
> +				 <&xo_board_clk>;
> +			clock-names = "cfg_ahb",
> +				      "ref";
> +
> +			resets = <&gcc GCC_QUSB2_0_PHY_BCR>;
> +			status = "disabled";
> +		};
> +
> +		ssphy_0: phy@...00 {
> +			compatible = "qcom,ipq9574-qmp-usb3-phy";
> +			reg = <0x0007d000 0xa00>;
> +			#clock-cells = <1>;
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			ranges;

Why do you need these three?

> +
> +			clocks = <&gcc GCC_USB0_AUX_CLK>,
> +				 <&gcc GCC_USB0_PHY_CFG_AHB_CLK>,
> +				 <&gcc GCC_USB0_PIPE_CLK>;
> +			clock-names = "aux",
> +				      "cfg_ahb",
> +				      "pipe";
> +
> +			resets = <&gcc GCC_USB0_PHY_BCR>,
> +				 <&gcc GCC_USB3PHY_0_PHY_BCR>;
> +			reset-names = "phy",
> +				      "common";
> +			status = "disabled";
> +
> +			#phy-cells = <0>;
> +			clock-output-names = "usb0_pipe_clk";

Does not look like you tested the DTS against bindings. Please run `make
dtbs_check` (see Documentation/devicetree/bindings/writing-schema.rst
for instructions).

> +		};
> +
>  		pcie0_phy: phy@...00 {
>  			compatible = "qcom,ipq9574-qmp-gen3x1-pcie-phy";
>  			reg = <0x00084000 0x1bc>; /* Serdes PLL */
> @@ -436,6 +475,50 @@
>  			status = "disabled";
>  		};
>  
> +		usb3: usb3@...0000 {

usb@

> +			compatible = "qcom,ipq9574-dwc3", "qcom,dwc3";
> +			reg = <0x08af8800 0x400>;
> +			#address-cells = <1>;
> +			#size-cells = <1>;
> +			ranges;



> +
> +			clocks = <&gcc GCC_SNOC_USB_CLK>,
> +				 <&gcc GCC_ANOC_USB_AXI_CLK>,
> +				 <&gcc GCC_USB0_MASTER_CLK>,
> +				 <&gcc GCC_USB0_SLEEP_CLK>,
> +				 <&gcc GCC_USB0_MOCK_UTMI_CLK>;
> +
> +			clock-names = "sys_noc_axi",
> +				      "anoc_axi",
> +				      "master",
> +				      "sleep",
> +				      "mock_utmi";
> +
> +			assigned-clocks = <&gcc GCC_USB0_MASTER_CLK>,
> +					  <&gcc GCC_USB0_MOCK_UTMI_CLK>;
> +			assigned-clock-rates = <200000000>,
> +					       <24000000>;
> +
> +			resets = <&gcc GCC_USB_BCR>;
> +			status = "disabled";
> +
> +			dwc_0: usb@...0000 {
> +				compatible = "snps,dwc3";
> +				reg = <0x8a00000 0xcd00>;
> +				clocks = <&gcc GCC_USB0_MOCK_UTMI_CLK>;
> +				clock-names = "ref";
> +				interrupts = <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>;
> +				phys = <&qusb_phy_0>, <&ssphy_0>;
> +				phy-names = "usb2-phy", "usb3-phy";
> +				tx-fifo-resize;
> +				snps,is-utmi-l1-suspend;
> +				snps,hird-threshold = /bits/ 8 <0x0>;
> +				snps,dis_u2_susphy_quirk;
> +				snps,dis_u3_susphy_quirk;
> +				dr_mode = "host";

Are you saying that peripheral mode cannot work on this USB controller?
Never?

Best regards,
Krzysztof