linux-kernel - Re: [PATCH v5 6/8] dt-bindings: mmc: sdhci-of-dwcmhsc: Add Sophgo SG2042 support

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Message-ID: <20240719-catnip-pushup-81d3e104de7b@spud>
Date: Fri, 19 Jul 2024 15:59:26 +0100
From: Conor Dooley <conor@...nel.org>
To: Chen Wang <unicornxw@...il.com>
Cc: adrian.hunter@...el.com, aou@...s.berkeley.edu, conor+dt@...nel.org,
	guoren@...nel.org, inochiama@...look.com, jszhang@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, palmer@...belt.com,
	paul.walmsley@...ive.com, robh@...nel.org, ulf.hansson@...aro.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mmc@...r.kernel.org, linux-riscv@...ts.infradead.org,
	chao.wei@...hgo.com, haijiao.liu@...hgo.com,
	xiaoguang.xing@...hgo.com, tingzhu.wang@...hgo.com,
	Chen Wang <unicorn_wang@...look.com>
Subject: Re: [PATCH v5 6/8] dt-bindings: mmc: sdhci-of-dwcmhsc: Add Sophgo
 SG2042 support

On Fri, Jul 19, 2024 at 04:46:50PM +0800, Chen Wang wrote:
> From: Chen Wang <unicorn_wang@...look.com>
> 
> SG2042 use Synopsys dwcnshc IP for SD/eMMC controllers.
> 
> SG2042 defines 3 clocks for SD/eMMC controllers.
> - EMMC_100M/SD_100M for cclk(Card clocks in DWC_mshc), so reuse
>   existing "core".
> - AXI_EMMC/AXI_SD for aclk/hclk(Bus interface clocks in DWC_mshc)
>   and blck(Core Base Clock in DWC_mshc), these 3 clocks share one
>   source, so reuse existing "bus".
> - 100K_EMMC/100K_SD for cqetmclk(Timer clocks in DWC_mshc), so reuse
>   existing "timer" which was added for rockchip specified.
> 
> Signed-off-by: Chen Wang <unicorn_wang@...look.com>
> ---
>  .../bindings/mmc/snps,dwcmshc-sdhci.yaml      | 60 +++++++++++++------
>  1 file changed, 43 insertions(+), 17 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml b/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml
> index 4d3031d9965f..80d50178d2e3 100644
> --- a/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml
> +++ b/Documentation/devicetree/bindings/mmc/snps,dwcmshc-sdhci.yaml
> @@ -10,9 +10,6 @@ maintainers:
>    - Ulf Hansson <ulf.hansson@...aro.org>
>    - Jisheng Zhang <Jisheng.Zhang@...aptics.com>
>  
> -allOf:
> -  - $ref: mmc-controller.yaml#
> -
>  properties:
>    compatible:
>      enum:
> @@ -21,6 +18,7 @@ properties:
>        - snps,dwcmshc-sdhci
>        - sophgo,cv1800b-dwcmshc
>        - sophgo,sg2002-dwcmshc
> +      - sophgo,sg2042-dwcmshc
>        - thead,th1520-dwcmshc
>  
>    reg:
> @@ -31,22 +29,11 @@ properties:
>  
>    clocks:
>      minItems: 1
> -    items:
> -      - description: core clock
> -      - description: bus clock for optional
> -      - description: axi clock for rockchip specified
> -      - description: block clock for rockchip specified
> -      - description: timer clock for rockchip specified

Does anyone know what "for rockchip specified" means? Is meant to be "for
rockchip specifically"? If it is, should probably be actually
constrained! Patch itself seems fine though and I don't think it's your
responsibility to fix that, so
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>

Cheers,
Conor.

> -
> +    maxItems: 5
>  
>    clock-names:
>      minItems: 1
> -    items:
> -      - const: core
> -      - const: bus
> -      - const: axi
> -      - const: block
> -      - const: timer
> +    maxItems: 5
>  
>    resets:
>      maxItems: 5
> @@ -63,7 +50,6 @@ properties:
>      description: Specify the number of delay for tx sampling.
>      $ref: /schemas/types.yaml#/definitions/uint8
>  
> -
>  required:
>    - compatible
>    - reg
> @@ -71,6 +57,46 @@ required:
>    - clocks
>    - clock-names
>  
> +allOf:
> +  - $ref: mmc-controller.yaml#
> +
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: sophgo,sg2042-dwcmshc
> +
> +    then:
> +      properties:
> +        clocks:
> +          items:
> +            - description: core clock
> +            - description: bus clock
> +            - description: timer clock
> +        clock-names:
> +          items:
> +            - const: core
> +            - const: bus
> +            - const: timer
> +    else:
> +      properties:
> +        clocks:
> +          minItems: 1
> +          items:
> +            - description: core clock
> +            - description: bus clock for optional
> +            - description: axi clock for rockchip specified
> +            - description: block clock for rockchip specified
> +            - description: timer clock for rockchip specified
> +        clock-names:
> +          minItems: 1
> +          items:
> +            - const: core
> +            - const: bus
> +            - const: axi
> +            - const: block
> +            - const: timer
> +
>  unevaluatedProperties: false
>  
>  examples:
> -- 
> 2.34.1
> 

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