lkml.org 
[lkml]   [2022]   [May]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH 2/3] dt-bindings: usb: atmel: Add Microchip LAN966x compatible string
Hi Alexandre,

On Fri, 20 May 2022 15:52:22 +0200
Alexandre Belloni <alexandre.belloni@bootlin.com> wrote:

> Hello,
>
> On 20/05/2022 15:38:36+0200, Krzysztof Kozlowski wrote:
> > On 20/05/2022 15:02, Herve Codina wrote:
> > > On Fri, 20 May 2022 14:50:24 +0200
> > > Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> wrote:
> > >
> > >> On 20/05/2022 14:21, Herve Codina wrote:
> > >>>>> I think it makes sense to keep 'microchip,lan966x-udc' for the USB
> > >>>>> device controller (same controller on LAN9662 and LAN9668) and so
> > >>>>> keeping the same rules as for other common parts.
> > >>>>
> > >>>> Having wildcard was rather a mistake and we already started correcting
> > >>>> it, so keeping the "mistake" neither gives you consistency, nor
> > >>>> correctness...
> > >>>>
> > >>>
> > >>> I think that the "family" compatible should be present.
> > >>> This one allows to define the common parts in the common
> > >>> .dtsi file (lan966x.dtsi in our case).
> > >>>
> > >>> What do you think about:
> > >>> - microchip,lan9662-udc
> > >>> - microchip,lan9668-udc
> > >>> - microchip,lan966-udc <-- Family
> > >>>
> > >>> lan966 is defined as the family compatible string since (1) in
> > >>> bindings/arm/atmel-at91.yaml and in Documentation/arm/microchip.rst
> > >>>
> > >>
> > >> You can add some family compatible, if it makes sense. I don't get why
> > >> do you mention it - we did not discuss family names, but using
> > >> wildcards... Just please do not add wildcards.
> > >
> > > Well, I mentioned it as I will only use the family compatible string
> > > and not the SOC (lan9662 or lan9668) compatible string in lan966x.dtsi.
> > > In this case, the family compatible string can be seen as a kind of
> > > "wildcard".
> >
> > I understood as "the "family" compatible should be present" as you want
> > to add it as a fallback. It would be okay (assuming devices indeed share
> > family design). If you want to use it as the only one, then it is again
> > not a recommended approach. Please use specific compatibles.
> >
> > I mean, why do we have this discussion? What is the benefit for you to
> > implement something not-recommended by Devicetree spec and style?
> >
>
> Honestly, I would just go for microchip,lan9662-udc. There is no
> difference between lan9662 and lan9668 apart from the number of switch
> ports.
>

Sounds good.
I will do that.

Thanks,
Hervé

--
Hervé Codina, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

\
 
 \ /
  Last update: 2022-05-20 16:12    [W:0.140 / U:0.204 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site