linux-kernel - Re: [PATCH mmc-next v3 1/2] dt-bindings: mmc: add alias example

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Date:   Fri, 28 Aug 2020 16:24:40 -0600
From:   Rob Herring <robh@...nel.org>
To:     Matthias Schiffer <matthias.schiffer@...tq-group.com>
Cc:     Ulf Hansson <ulf.hansson@...aro.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH mmc-next v3 1/2] dt-bindings: mmc: add alias example

On Tue, Aug 25, 2020 at 03:44:40PM +0200, Matthias Schiffer wrote:
> As for I2C and SPI, it now is possible to reserve a fixed index for
> mmc/mmcblk devices.
> 
> Signed-off-by: Matthias Schiffer <matthias.schiffer@...tq-group.com>
> ---
> 
> v3: new patch
> 
>  Documentation/devicetree/bindings/mmc/mmc-controller.yaml | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
> index b96da0c7f819..22ed4a36c65d 100644
> --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
> +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml
> @@ -367,6 +367,14 @@ examples:
>      };
>  
>    - |
> +    /*
> +     * Optionally define an alias to reserve a fixed index for the
> +     * mmc and mmcblk devices
> +     */
> +    aliases {
> +        mmc0 = &mmc3;
> +    };

This will break if we improve schemas because this node is actually 
/example-1/aliases.

So please drop. If you want, I'd really like to have a defined set (i.e. 
a schema) of alias names. This would require deleting a bunch on some 
platforms that just made up a bunch of them.

> +
>      mmc3: mmc@...2000 {
>          #address-cells = <1>;
>          #size-cells = <0>;
> -- 
> 2.17.1
>