linux-kernel - Re: [PATCH 1/2] dt-bindings: PCI: mediatek-gen3: Add support for MT8195

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Date:   Tue, 1 Jun 2021 11:53:50 +0800
From:   Chen-Yu Tsai <wenst@...omium.org>
To:     Jianjun Wang <jianjun.wang@...iatek.com>
Cc:     Ryder Lee <ryder.lee@...iatek.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Rob Herring <robh+dt@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        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,
        Randy Wu <Randy.Wu@...iatek.com>, youlin.pei@...iatek.com
Subject: Re: [PATCH 1/2] dt-bindings: PCI: mediatek-gen3: Add support for MT8195

Hi,

On Tue, Jun 1, 2021 at 10:50 AM Jianjun Wang <jianjun.wang@...iatek.com> wrote:
>
> MT8195 is an ARM platform SoC which has the same PCIe IP with MT8192.

Based on what I'm seeing internally, there seems to be some inconsistency
across the MediaTek platform on whether new compatible strings should be
introduced for "fully compatible" IP blocks.

If this hardware block in MT8195 is "the same" as the one in MT8192, do we
really need the new compatible string? Are there any concerns?

Thanks
ChenYu

> Signed-off-by: Jianjun Wang <jianjun.wang@...iatek.com>
> ---
>  Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> index e7b1f9892da4..d5e4a3e63d97 100644
> --- a/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> +++ b/Documentation/devicetree/bindings/pci/mediatek-pcie-gen3.yaml
> @@ -48,7 +48,9 @@ allOf:
>
>  properties:
>    compatible:
> -    const: mediatek,mt8192-pcie
> +    oneOf:
> +      - const: mediatek,mt8192-pcie
> +      - const: mediatek,mt8195-pcie
>
>    reg:
>      maxItems: 1
> --
> 2.18.0
> _______________________________________________
> Linux-mediatek mailing list
> Linux-mediatek@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-mediatek

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