Re: [PATCH v3 2/3] dt-bindings: usb: renesas_usbhs: Add support for RZ/A1

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On Fri, Jan 05, 2018 at 05:46:46PM -0500, Chris Brandt wrote:
> Document support for RZ/A1 SoCs
> 
> Signed-off-by: Chris Brandt <chris.brandt@xxxxxxxxxxx>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> ---
> v3:
>  * Removed "renesas,usbhs-r7s72100"

Unless I am mistaken you want both renesas,usbhs-r7s72100, for the SoC
and renesas,rza1-usbhs for the family[*] of SoCs (which currently only has one
member upstream).

Similar to the way there are per-SoC compat strings for R-Car Gen2 and Gen3
SoCs, and per-SoC family fallback compat strings to Gen2 and Gen3.

The motivation for this that empirically SoC families seem to be able to
share the implementation on the driver-side, so only the fallback compat
strings need to be implemented in the driver by defining per-SoC compat
strings we have the flexibility to implement them if differences emerge
between SoCs in the same family.

[*] I used the term family here to group SoCs together. I acknowledge that
Renesas may not refer to them in this way.



> v2:
>  * Added Reviewed-by
> ---
>  Documentation/devicetree/bindings/usb/renesas_usbhs.txt | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/devicetree/bindings/usb/renesas_usbhs.txt b/Documentation/devicetree/bindings/usb/renesas_usbhs.txt
> index 47394ab788e3..fa16d8d33815 100644
> --- a/Documentation/devicetree/bindings/usb/renesas_usbhs.txt
> +++ b/Documentation/devicetree/bindings/usb/renesas_usbhs.txt
> @@ -15,6 +15,7 @@ Required properties:
>  	- "renesas,usbhs-r8a77995" for r8a77995 (R-Car D3) compatible device
>  	- "renesas,rcar-gen2-usbhs" for R-Car Gen2 or RZ/G1 compatible devices
>  	- "renesas,rcar-gen3-usbhs" for R-Car Gen3 compatible device
> +	- "renesas,rza1-usbhs" for RZ/A1 compatible device
>  
>  	When compatible with the generic version, nodes must list the
>  	SoC-specific version corresponding to the platform first followed
> -- 
> 2.15.1
> 
> 
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