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Date: Sun, 14 Apr 2024 08:11:48 +0200
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Subject: Re: [PATCH 2/6] dt-bindings: mmc: Add support for BCM2712 SD host
 controller
To: Andrea della Porta <andrea.porta@suse.com>,
 Ulf Hansson <ulf.hansson@linaro.org>, Rob Herring <robh@kernel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Conor Dooley <conor+dt@kernel.org>,
 Florian Fainelli <florian.fainelli@broadcom.com>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@broadcom.com>,
 Linus Walleij <linus.walleij@linaro.org>,
 Adrian Hunter <adrian.hunter@intel.com>, Kamal Dasu
 <kamal.dasu@broadcom.com>, Al Cooper <alcooperx@gmail.com>,
 linux-mmc@vger.kernel.org, devicetree@vger.kernel.org,
 linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
 linux-gpio@vger.kernel.org, Jonathan Bell <jonathan@raspberrypi.com>,
 Phil Elwell <phil@raspberrypi.com>
References: <cover.1713036964.git.andrea.porta@suse.com>
 <ad96fff723675c2d65a5e3328da9b09f2781cbcd.1713036964.git.andrea.porta@suse.com>
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From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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In-Reply-To: <ad96fff723675c2d65a5e3328da9b09f2781cbcd.1713036964.git.andrea.porta@suse.com>
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On 14/04/2024 00:14, Andrea della Porta wrote:
> Signed-off-by: Andrea della Porta <andrea.porta@suse.com>

? And what is being done here and why?

> ---
>  .../bindings/mmc/brcm,sdhci-brcmstb.yaml      | 51 ++++++++++++++++++-
>  1 file changed, 50 insertions(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/brcm,sdhci-brcmstb.yaml b/Documentation/devicetree/bindings/mmc/brcm,sdhci-brcmstb.yaml
> index cbd3d6c6c77f..6aa137d78e4f 100644
> --- a/Documentation/devicetree/bindings/mmc/brcm,sdhci-brcmstb.yaml
> +++ b/Documentation/devicetree/bindings/mmc/brcm,sdhci-brcmstb.yaml
> @@ -13,6 +13,7 @@ maintainers:
>  properties:
>    compatible:
>      oneOf:
> +      - const: brcm,bcm2712-sdhci
>        - items:
>            - enum:
>                - brcm,bcm7216-sdhci
> @@ -26,12 +27,16 @@ properties:
>            - const: brcm,sdhci-brcmstb
>  
>    reg:
> -    maxItems: 2
> +    minItems: 2
> +    maxItems: 4
>  
>    reg-names:
> +    minItems: 2
>      items:
>        - const: host
>        - const: cfg
> +      - const: busisol
> +      - const: lcpll
>  
>    interrupts:
>      maxItems: 1
> @@ -60,6 +65,7 @@ properties:
>      description: Specifies that controller should use auto CMD12
>  
>  allOf:
> +  - $ref: sdhci-common.yaml
>    - $ref: mmc-controller.yaml#

Why? Anyway, this replaces mmc-controller, doesn't it?

>    - if:
>        properties:
> @@ -71,6 +77,28 @@ allOf:
>        required:
>          - clock-frequency
>  
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: brcm,bcm2712-sdhci
> +
> +    then:
> +      properties:
> +        reg:
> +          maxItems: 4
> +        clock-names:
> +         const: "sw_sdio"

Not tested.

> +
> +    else:
> +      properties:
> +        reg:
> +          minItems: 2
> +          maxItems: 2
> +        reg-names:
> +          minItems: 2
> +          maxItems: 2
> +
>  required:
>    - compatible
>    - reg
> @@ -114,3 +142,24 @@ examples:
>        clocks = <&scmi_clk 245>;
>        clock-names = "sw_sdio";
>      };
> +
> +  - |
> +    soc {
> +      #address-cells = <2>;
> +      #size-cells = <2>;
> +
> +      mmc@fff000 {
> +        compatible = "brcm,bcm2712-sdhci";
> +        reg = <0x10 0x00fff000  0x0 0x260>,
> +              <0x10 0x00fff400  0x0 0x200>,
> +              <0x10 0x015040b0  0x0 0x4>,  // Bus isolation control
> +              <0x10 0x015200f0  0x0 0x24>; // LCPLL control misc0-8
> +        reg-names = "host", "cfg", "busisol", "lcpll";
> +        interrupts = <0x0 0x111 0x4>;

Use proper defines.

> +        clocks = <&clk_emmc2>;
> +        sdhci-caps-mask = <0x0000C000 0x0>;
> +        sdhci-caps = <0x0 0x0>;
> +        mmc-ddr-3_3v;
> +        clock-names = "sw_sdio";

names *always* follow property. In every DTS. Please fix youro DTS.


Best regards,
Krzysztof