linux-kernel - Re: [PATCH v2 1/4] dt-bindings: pci: remove fallback from Rockchip DesignWare binding

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Date:   Thu, 14 Apr 2022 12:53:51 -0500
From:   Rob Herring <robh@...nel.org>
To:     Peter Geis <pgwipeout@...il.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Simon Xue <xxm@...k-chips.com>,
        linux-rockchip@...ts.infradead.org, linux-pci@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] dt-bindings: pci: remove fallback from Rockchip
 DesignWare binding

On Wed, Apr 13, 2022 at 09:37:28AM -0400, Peter Geis wrote:
> The snps,dw-pcie binds to a standalone driver.
> It is not fully compatible with the Rockchip implementation and causes a
> hang if it binds to the device.
> 
> Remove this binding as a valid fallback.
> 
> Signed-off-by: Peter Geis <pgwipeout@...il.com>
> ---
>  Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml b/Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml
> index 142bbe577763..8dc11fed8a3c 100644
> --- a/Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml
> +++ b/Documentation/devicetree/bindings/pci/rockchip-dw-pcie.yaml
> @@ -32,7 +32,6 @@ properties:
>    compatible:
>      items:
>        - const: rockchip,rk3568-pcie
> -      - const: snps,dw-pcie

With this, you no longer need 'select' so please drop it too.

>  
>    reg:
>      items:
> @@ -110,7 +109,7 @@ examples:
>          #size-cells = <2>;
>  
>          pcie3x2: pcie@...80000 {
> -            compatible = "rockchip,rk3568-pcie", "snps,dw-pcie";
> +            compatible = "rockchip,rk3568-pcie";
>              reg = <0x3 0xc0800000 0x0 0x390000>,
>                    <0x0 0xfe280000 0x0 0x10000>,
>                    <0x3 0x80000000 0x0 0x100000>;
> -- 
> 2.25.1
> 
>