linux-kernel - Re: [PATCH v2] dt-bindings: PCI: xilinx-cpm: Fix reg property order

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Message-ID: <b9c36db0-fb4f-19d2-68af-25b926cd33b0@xilinx.com>
Date:   Mon, 16 May 2022 13:17:35 +0200
From:   Michal Simek <michal.simek@...inx.com>
To:     Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>,
        <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>
CC:     <lorenzo.pieralisi@....com>, <bhelgaas@...gle.com>,
        <robh@...nel.org>
Subject: Re: [PATCH v2] dt-bindings: PCI: xilinx-cpm: Fix reg property order



On 5/16/22 12:22, Bharat Kumar Gogada wrote:
> All existing vendor DTSes are using "cpm_slcr" reg followed by "cfg" reg.
> 
> This order is also suggested by node name which is pcie@...10000 which
> suggests that cpm_slcr register should be the first.
> 
> Driver itself is using devm_platform_ioremap_resource_byname() for both
> names that's why there is no functional change even on description which
> are using current order.
> 
> But still prefer to change order to cover currently used description.
> Fixes: e22fadb1d014 ("PCI: xilinx-cpm: Add YAML schemas for Versal CPM Root Port")
> 
> Signed-off-by: Bharat Kumar Gogada <bharat.kumar.gogada@...inx.com>
> ---
>   .../devicetree/bindings/pci/xilinx-versal-cpm.yaml     | 10 +++++-----
>   1 file changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml b/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml
> index 32f4641085bc..cca395317a4c 100644
> --- a/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml
> +++ b/Documentation/devicetree/bindings/pci/xilinx-versal-cpm.yaml
> @@ -18,13 +18,13 @@ properties:
>   
>     reg:
>       items:
> -      - description: Configuration space region and bridge registers.
>         - description: CPM system level control and status registers.
> +      - description: Configuration space region and bridge registers.
>   
>     reg-names:
>       items:
> -      - const: cfg
>         - const: cpm_slcr
> +      - const: cfg
>   
>     interrupts:
>       maxItems: 1
> @@ -86,9 +86,9 @@ examples:
>                          ranges = <0x02000000 0x0 0xe0000000 0x0 0xe0000000 0x0 0x10000000>,
>                                   <0x43000000 0x80 0x00000000 0x80 0x00000000 0x0 0x80000000>;
>                          msi-map = <0x0 &its_gic 0x0 0x10000>;
> -                       reg = <0x6 0x00000000 0x0 0x10000000>,
> -                             <0x0 0xfca10000 0x0 0x1000>;
> -                       reg-names = "cfg", "cpm_slcr";
> +                       reg = <0x0 0xfca10000 0x0 0x1000>,
> +                             <0x6 0x00000000 0x0 0x10000000>;
> +                       reg-names = "cpm_slcr", "cfg";
>                          pcie_intc_0: interrupt-controller {
>                                  #address-cells = <0>;
>                                  #interrupt-cells = <1>;

Reviewed-by: Michal Simek <michal.simek@....com>

Thanks,
Michal