linux-kernel - Re: [PATCH v3 1/2] dt-bindings: google,cros-ec-keyb: Introduce switches only compatible

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Date:   Tue, 3 May 2022 09:14:21 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Krzysztof Kozlowski <krzk@...nel.org>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        LKML <linux-kernel@...r.kernel.org>, patches@...ts.linux.dev,
        chrome-platform@...ts.linux.dev,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>, Benson Leung <bleung@...omium.org>,
        Guenter Roeck <groeck@...omium.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        "Joseph S. Barrera III" <joebar@...omium.org>
Subject: Re: [PATCH v3 1/2] dt-bindings: google,cros-ec-keyb: Introduce
 switches only compatible

Hi,

On Tue, May 3, 2022 at 8:54 AM Krzysztof Kozlowski <krzk@...nel.org> wrote:
>
> On 03/05/2022 17:46, Doug Anderson wrote:
> > Hi,
> >
> > On Tue, May 3, 2022 at 8:42 AM Krzysztof Kozlowski
> > <krzysztof.kozlowski@...aro.org> wrote:
> >>
> >> On 03/05/2022 06:22, Stephen Boyd wrote:
> >>> If the ChromeOS board is a detachable, this cros-ec-keyb device won't
> >>> have a matrix keyboard but it may have some button switches, e.g. volume
> >>> buttons and power buttons. The driver still registers a keyboard though
> >>> and that leads to userspace confusion around where the keyboard is.
> >>
> >> (...)
> >>
> >>>
> >>> +if:
> >>> +  properties:
> >>> +    compatible:
> >>> +      contains:
> >>> +        const: google,cros-ec-keyb
> >>> +then:
> >>> +  allOf:
> >>> +    - $ref: "/schemas/input/matrix-keymap.yaml#"
> >>> +  required:
> >>> +    - keypad,num-rows
> >>> +    - keypad,num-columns
> >>> +    - linux,keymap
> >>
> >> else:
> >>   properties:
> >>     function-row-phsymap: false
> >>     google,needs-ghost-filter: false
> >>
> >> Because these are not valid for the non-matrix-keyboard case, right?
> >
> > Isn't that implicit because this file has `unevaluatedProperties: false` ?
>
> But they are evaluated here, aren't they?

Only if the "if" test, though? ...ah, or is this a difference between
"unevaluatedProperties" and "additionalProperties" ?

-Doug