linux-kernel - Re: [PATCH v1 2/3] arm64: dts: mt8195: Add pcie and pcie phy nodes

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Date:   Wed, 19 Oct 2022 10:55:49 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Tinghan Shen <tinghan.shen@...iatek.com>,
        Ryder Lee <ryder.lee@...iatek.com>,
        Jianjun Wang <jianjun.wang@...iatek.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     linux-pci@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v1 2/3] arm64: dts: mt8195: Add pcie and pcie phy nodes

Il 17/10/22 09:08, Tinghan Shen ha scritto:
> Add pcie and pcie phy nodes for mt8195.
> 
> Signed-off-by: Jianjun Wang <jianjun.wang@...iatek.com>
> Signed-off-by: Tinghan Shen <tinghan.shen@...iatek.com>
> ---
>   arch/arm64/boot/dts/mediatek/mt8195.dtsi | 143 +++++++++++++++++++++++
>   1 file changed, 143 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> index d03f0c2b8233..903e92d6156f 100644
> --- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
> @@ -1182,6 +1182,104 @@
>   			status = "disabled";
>   		};
>   
> +		pcie0: pcie@...f0000 {
> +			compatible = "mediatek,mt8195-pcie",
> +				     "mediatek,mt8192-pcie";

..snip..

> +
> +			phys = <&pciephy>;
> +			phy-names = "pcie-phy";
> +
> +			power-domains = <&spm MT8195_POWER_DOMAIN_PCIE_MAC_P0>;

You're missing the resets:

			resets = <&infracfg_ao MT8195_INFRA_RST2_PCIE_P0_SWRST>;
			reset-names = "mac";

> +
> +			#interrupt-cells = <1>;
> +			interrupt-map-mask = <0 0 0 7>;

..snip..

> +		};
> +
> +		pcie1: pcie@...f8000 {
> +			compatible = "mediatek,mt8195-pcie",
> +				     "mediatek,mt8192-pcie";

..snip..

> +			power-domains = <&spm MT8195_POWER_DOMAIN_PCIE_MAC_P1>;

Here too:
			resets = <&infracfg_ao MT8195_INFRA_RST2_USBSIF_P1_SWRST>,
				 <&infracfg_ao MT8195_INFRA_RST2_PCIE_P1_SWRST>;
			reset-names = "phy", "mac";

> +
> +			#interrupt-cells = <1>;

..snip..

> @@ -1241,6 +1339,34 @@
>   				reg = <0x189 0x2>;
>   				bits = <7 5>;
>   			};
> +			pciephy_rx_ln1: pciephy-rx-ln1@190 {
> +				reg = <0x190 0x1>;
> +				bits = <0 4>;
> +			};
> +			pciephy_tx_ln1_nmos: pciephy-tx-ln1-nmos@190 {

Please run dtbs_check and try to build the kernel before pushing commits upstream.
This will give you a not-so-nice warning and that shall not happen.

You can solve it by naming these nodes like:
pciephy-rx-ln1@190,1
pciephy-tx-ln1-nmos@190,2

...etc

Regards,
Angelo