linux-kernel - Re: [PATCH] dt-bindings: spi: xilinx: Add clocks & clock-names properties

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Message-ID: <20240924-impaired-starving-eef91b339f67@spud>
Date: Tue, 24 Sep 2024 17:36:46 +0100
From: Conor Dooley <conor@...nel.org>
To: Amit Kumar Mahapatra <amit.kumar-mahapatra@....com>
Cc: broonie@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, michal.simek@....com,
	linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	git@....com, amitrkcian2002@...il.com
Subject: Re: [PATCH] dt-bindings: spi: xilinx: Add clocks & clock-names
 properties

On Mon, Sep 23, 2024 at 06:02:42PM +0530, Amit Kumar Mahapatra wrote:
> Include the 'clocks' and 'clock-names' properties in the AXI Quad-SPI
> bindings. When the AXI4-Lite interface is enabled, the core operates in
> legacy mode, maintaining backward compatibility with version 1.00, and
> uses 's_axi_aclk' and 'ext_spi_clk'. For the AXI interface, it uses
> 's_axi4_aclk' and 'ext_spi_clk'.
> 
> Signed-off-by: Amit Kumar Mahapatra <amit.kumar-mahapatra@....com>
> ---
> BRANCH: for-next
> ---
>  .../devicetree/bindings/spi/spi-xilinx.yaml   | 29 +++++++++++++++++++
>  1 file changed, 29 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/spi/spi-xilinx.yaml b/Documentation/devicetree/bindings/spi/spi-xilinx.yaml
> index 4beb3af0416d..9dfec195ecd4 100644
> --- a/Documentation/devicetree/bindings/spi/spi-xilinx.yaml
> +++ b/Documentation/devicetree/bindings/spi/spi-xilinx.yaml
> @@ -12,6 +12,25 @@ maintainers:
>  allOf:
>    - $ref: spi-controller.yaml#

Please move the allOf block down to the end of the binding, after the
property definitions.

> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: xlnx,axi-quad-spi-1.00.a
> +    then:
> +      properties:
> +        clock-names:
> +          items:
> +            - const: s_axi_aclk
> +            - const: ext_spi_clk

These are all clocks, there should be no need to have "clk" in the
names.

> +
> +    else:
> +      properties:
> +        clock-names:
> +          items:
> +            - const: s_axi4_aclk
> +            - const: ext_spi_clk
> +
>  properties:
>    compatible:
>      enum:
> @@ -25,6 +44,12 @@ properties:
>    interrupts:
>      maxItems: 1
>  
> +  clocks:
> +    maxItems: 2
> +
> +  clock-names:
> +    maxItems: 2
> +
>    xlnx,num-ss-bits:
>      description: Number of chip selects used.
>      minimum: 1
> @@ -39,6 +64,8 @@ required:
>    - compatible
>    - reg
>    - interrupts
> +  - clocks
> +  - clock-names

New required properties are an ABI break, where is the driver patch
that makes use of these clocks?

Cheers,
Conor.

>  
>  unevaluatedProperties: false
>  
> @@ -49,6 +76,8 @@ examples:
>        interrupt-parent = <&intc>;
>        interrupts = <0 31 1>;
>        reg = <0x41e00000 0x10000>;
> +      clocks = <&clkc 72>, <&clkc 73>;
> +      clock-names = "s_axi4_aclk", "ext_spi_clk";
>        xlnx,num-ss-bits = <0x1>;
>        xlnx,num-transfer-bits = <32>;
>      };
> -- 
> 2.34.1
> 

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