linux-kernel - Re: [PATCH 5/6] dt-bindings: input: zinitix: Document touch-keys support

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Date:   Wed, 27 Oct 2021 23:54:38 +0500
From:   Nikita Travkin <nikita@...n.ru>
To:     Luca Weiss <luca@...tu.xyz>
Cc:     dmitry.torokhov@...il.com, ~postmarketos/upstreaming@...ts.sr.ht,
        robh+dt@...nel.org, Michael.Srba@...nam.cz,
        linus.walleij@...aro.org, broonie@...nel.org,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        phone-devel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 5/6] dt-bindings: input: zinitix: Document touch-keys
 support

Hi Luca,

Luca Weiss писал(а) 27.10.2021 23:33:
> Hi Nikita,
> 
> On Mittwoch, 27. Oktober 2021 20:13:49 CEST Nikita Travkin wrote:
>> In some configrations the touch controller can support the touch-keys.
>> Doucument the linux,keycodes property that enables those keys and
>> specifies the keycodes that should be used to report the key events.
>> 
>> Signed-off-by: Nikita Travkin <nikita@...n.ru>
>> ---
>>  .../bindings/input/touchscreen/zinitix,bt400.yaml         | 8 
>> ++++++++
>>  1 file changed, 8 insertions(+)
>> 
>> diff --git
>> a/Documentation/devicetree/bindings/input/touchscreen/zinitix,bt400.yaml
>> b/Documentation/devicetree/bindings/input/touchscreen/zinitix,bt400.yaml
>> index b4e5ba7c0b49..40b243c07fd4 100644
>> --- 
>> a/Documentation/devicetree/bindings/input/touchscreen/zinitix,bt400.yaml
>> +++
>> b/Documentation/devicetree/bindings/input/touchscreen/zinitix,bt400.yaml 
>> @@
>> -79,6 +79,14 @@ properties:
>>      $ref: /schemas/types.yaml#/definitions/uint32
>>      enum: [1, 2]
>> 
>> +  linux,keycodes:
>> +    description: |
>> +      This property specifies an array of keycodes assigned to the
>> +      touch-keys that can be present in some touchscreen 
>> configurations.
>> +    $ref: /schemas/input/input.yaml#/properties/linux,keycodes
>> +    minItems: 1
> 
> I think this would suggest all devices using the driver must have at 
> least
> keycode declared which doesn't seem to be the desired behavior?

As I haven't added the property to the "required" list I'd read this as
"If the property is defined it must contain from one to eight elements"
so I think that *technically* the schema is correct. (Otherwise the
dt_schema_check would fail verifying the example) However this indeed
may be true that I could give a better description than "can be present
in some touchscreen configurations."

Thanks,
Nikita

> Regards,
> Luca
> 
>> +    maxItems: 8
>> +
>>    touchscreen-size-x: true
>>    touchscreen-size-y: true
>>    touchscreen-fuzz-x: true