linux-kernel - Re: [PATCH 13/19] dt-bindings: PCI: qcom-ep: Rename "mmio" region to "mhi"

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Date:   Tue, 7 Mar 2023 09:18:41 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
        andersson@...nel.org, lpieralisi@...nel.org, kw@...ux.com,
        krzysztof.kozlowski+dt@...aro.org, robh@...nel.org
Cc:     konrad.dybcio@...aro.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, quic_srichara@...cinc.com
Subject: Re: [PATCH 13/19] dt-bindings: PCI: qcom-ep: Rename "mmio" region to
 "mhi"

On 06/03/2023 16:32, Manivannan Sadhasivam wrote:
> As per Qualcomm's internal documentation, the name of the region is "mhi"
> and not "mmio". So let's rename it to follow the convention.
> 
> Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> ---
>  Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
> index 89cfdee4b89f..c2d50f42cb4c 100644
> --- a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
> +++ b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml
> @@ -22,7 +22,7 @@ properties:
>        - description: External local bus interface registers
>        - description: Address Translation Unit (ATU) registers
>        - description: Memory region used to map remote RC address space
> -      - description: BAR memory region
> +      - description: MHI register region used as BAR
>  
>    reg-names:
>      items:
> @@ -31,7 +31,7 @@ properties:
>        - const: elbi
>        - const: atu
>        - const: addr_space
> -      - const: mmio
> +      - const: mhi

That literally breaks ABI just for convention. I don't think it's right
approach.

Best regards,
Krzysztof