linux-kernel - Re: [PATCH] dt-bindings: Fix 'reg' size issues in zynqmp examples

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Date:   Tue, 29 Sep 2020 08:55:33 +0200
From:   Michal Simek <michal.simek@...inx.com>
To:     Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Hyun Kwon <hyun.kwon@...inx.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Michal Simek <michal.simek@...inx.com>,
        Vinod Koul <vkoul@...nel.org>, dri-devel@...ts.freedesktop.org,
        dmaengine@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: Fix 'reg' size issues in zynqmp examples

Hi Rob,

On 28. 09. 20 17:59, Rob Herring wrote:
> The default sizes in examples for 'reg' are 1 cell each. Fix the
> incorrect sizes in zynqmp examples:
> 
> Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.example.dt.yaml: example-0: dma-controller@...c0000:reg:0: [0, 4249616384, 0, 4096] is too long
> 	From schema: /usr/local/lib/python3.8/dist-packages/dtschema/schemas/reg.yaml
> Documentation/devicetree/bindings/display/xlnx/xlnx,zynqmp-dpsub.example.dt.yaml: example-0: display@...a0000:reg:0: [0, 4249485312, 0, 4096] is too long
> 	From schema: /usr/local/lib/python3.8/dist-packages/dtschema/schemas/reg.yaml
> Documentation/devicetree/bindings/display/xlnx/xlnx,zynqmp-dpsub.example.dt.yaml: example-0: display@...a0000:reg:1: [0, 4249526272, 0, 4096] is too long
> 	From schema: /usr/local/lib/python3.8/dist-packages/dtschema/schemas/reg.yaml
> Documentation/devicetree/bindings/display/xlnx/xlnx,zynqmp-dpsub.example.dt.yaml: example-0: display@...a0000:reg:2: [0, 4249530368, 0, 4096] is too long
> 	From schema: /usr/local/lib/python3.8/dist-packages/dtschema/schemas/reg.yaml
> Documentation/devicetree/bindings/display/xlnx/xlnx,zynqmp-dpsub.example.dt.yaml: example-0: display@...a0000:reg:3: [0, 4249534464, 0, 4096] is too long
> 	From schema: /usr/local/lib/python3.8/dist-packages/dtschema/schemas/reg.yaml
> 
> Cc: Hyun Kwon <hyun.kwon@...inx.com>
> Cc: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> Cc: Michal Simek <michal.simek@...inx.com>
> Cc: Vinod Koul <vkoul@...nel.org>
> Cc: dri-devel@...ts.freedesktop.org
> Cc: dmaengine@...r.kernel.org
> Signed-off-by: Rob Herring <robh@...nel.org>
> ---
>  .../bindings/display/xlnx/xlnx,zynqmp-dpsub.yaml          | 8 ++++----
>  .../devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml | 2 +-
>  2 files changed, 5 insertions(+), 5 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/xlnx/xlnx,zynqmp-dpsub.yaml b/Documentation/devicetree/bindings/display/xlnx/xlnx,zynqmp-dpsub.yaml
> index 52a939cade3b..7b9d468c3e52 100644
> --- a/Documentation/devicetree/bindings/display/xlnx/xlnx,zynqmp-dpsub.yaml
> +++ b/Documentation/devicetree/bindings/display/xlnx/xlnx,zynqmp-dpsub.yaml
> @@ -145,10 +145,10 @@ examples:
>  
>      display@...a0000 {
>          compatible = "xlnx,zynqmp-dpsub-1.7";
> -        reg = <0x0 0xfd4a0000 0x0 0x1000>,
> -              <0x0 0xfd4aa000 0x0 0x1000>,
> -              <0x0 0xfd4ab000 0x0 0x1000>,
> -              <0x0 0xfd4ac000 0x0 0x1000>;
> +        reg = <0xfd4a0000 0x1000>,
> +              <0xfd4aa000 0x1000>,
> +              <0xfd4ab000 0x1000>,
> +              <0xfd4ac000 0x1000>;
>          reg-names = "dp", "blend", "av_buf", "aud";
>          interrupts = <0 119 4>;
>          interrupt-parent = <&gic>;
> diff --git a/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml b/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml
> index 5de510f8c88c..2a595b18ff6c 100644
> --- a/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml
> +++ b/Documentation/devicetree/bindings/dma/xilinx/xlnx,zynqmp-dpdma.yaml
> @@ -57,7 +57,7 @@ examples:
>  
>      dma: dma-controller@...c0000 {
>        compatible = "xlnx,zynqmp-dpdma";
> -      reg = <0x0 0xfd4c0000 0x0 0x1000>;
> +      reg = <0xfd4c0000 0x1000>;
>        interrupts = <GIC_SPI 122 IRQ_TYPE_LEVEL_HIGH>;
>        interrupt-parent = <&gic>;
>        clocks = <&dpdma_clk>;
> 

I would prefer to keep 64bit version.
I use this style.

    bus {
      #address-cells = <2>;
      #size-cells = <2>;
       ...
    };

Thanks,
Michal