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Date:   Tue, 22 Feb 2022 15:28:03 -0500
From:   =?utf-8?B?TsOtY29sYXMgRi4gUi4gQS4=?= Prado 
        <nfraprado@collabora.com>
To:     Allen-KH Cheng <allen-kh.cheng@mediatek.com>
Cc:     Matthias Brugger <matthias.bgg@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        --to=Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>,
        Project_Global_Chrome_Upstream_Group@mediatek.com,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org,
        Chen-Yu Tsai <wenst@chromium.org>,
        Ryder Lee <ryder.lee@kernel.org>
Subject: Re: [PATCH v2 07/23] arm64: dts: mt8192: Add xhci node
Message-ID: <20220222202803.7mkskda3nsjrunpx@notapiano>
References: <20220218091633.9368-1-allen-kh.cheng@mediatek.com>
 <20220218091633.9368-8-allen-kh.cheng@mediatek.com>
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In-Reply-To: <20220218091633.9368-8-allen-kh.cheng@mediatek.com>
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On Fri, Feb 18, 2022 at 05:16:17PM +0800, Allen-KH Cheng wrote:
> Add xhci node for mt8192 SoC.
> 
> Signed-off-by: Allen-KH Cheng <allen-kh.cheng@mediatek.com>
> ---
>  arch/arm64/boot/dts/mediatek/mt8192.dtsi | 25 ++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> index ce18d692175f..08c7c1c772f5 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
> @@ -10,6 +10,7 @@
>  #include <dt-bindings/interrupt-controller/arm-gic.h>
>  #include <dt-bindings/interrupt-controller/irq.h>
>  #include <dt-bindings/pinctrl/mt8192-pinfunc.h>
> +#include <dt-bindings/phy/phy.h>
>  #include <dt-bindings/power/mt8192-power.h>
>  
>  / {
> @@ -718,6 +719,30 @@
>  			status = "disabled";
>  		};
>  
> +		xhci: xhci@11200000 {

According to Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.yaml, this
node should be called usb (but the label can be kept as xhci).

> +			compatible = "mediatek,mt8192-xhci",
> +				     "mediatek,mtk-xhci";
> +			reg = <0 0x11200000 0 0x1000>,
> +			      <0 0x11203e00 0 0x0100>;
> +			reg-names = "mac", "ippc";
> +			interrupts-extended = <&gic GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH 0>;
> +			interrupt-names = "host";
> +			phys = <&u2port0 PHY_TYPE_USB2>,
> +			       <&u3port0 PHY_TYPE_USB3>;
> +			assigned-clocks = <&topckgen CLK_TOP_USB_TOP_SEL>,
> +					  <&topckgen CLK_TOP_SSUSB_XHCI_SEL>;
> +			assigned-clock-parents = <&topckgen CLK_TOP_UNIVPLL_D5_D4>,
> +						 <&topckgen CLK_TOP_UNIVPLL_D5_D4>;
> +			clocks = <&infracfg CLK_INFRA_SSUSB>,
> +				 <&infracfg CLK_INFRA_SSUSB_XHCI>,
> +				 <&apmixedsys CLK_APMIXED_USBPLL>;
> +			clock-names = "sys_ck", "xhci_ck", "ref_ck";
> +			wakeup-source;
> +			mediatek,syscon-wakeup = <&pericfg 0x420 102>;
> +			#address-cells = <2>;
> +			#size-cells = <2>;

This node doesn't have any children, so no need for #address-cells and
#size-cells, just drop them.

Also, let's keep this node disabled by default:

			status = "disabled";

> +		};
> +
>  		nor_flash: spi@11234000 {
>  			compatible = "mediatek,mt8192-nor";
>  			reg = <0 0x11234000 0 0xe0>;
> -- 
> 2.18.0
> 
>