Re: [RFC PATCH 1/2] dt-bindings: input: gpio-keys: enforce node names to match all properties
From: Jeff LaBundy <hidden>
Date: 2022-06-05 16:28:35
Also in:
linux-devicetree, lkml
Hi Krzysztof, On Sun, Jun 05, 2022 at 05:12:42PM +0200, Krzysztof Kozlowski wrote:
On 04/06/2022 05:04, Jeff LaBundy wrote:quoted
quoted
- dependencies: - wakeup-event-action: [ wakeup-source ] - linux,input-value: [ gpios ] - - unevaluatedProperties: false + "^(key|key-[a-z0-9-]+|[a-z0-9-]+-key)$":Maybe this would be better as: "^((key|switch|axis)|(key|switch|axis)-[a-z0-9-]+|[a-z0-9-]+-(key|switch|axis))$": ...or perhaps a more efficient version of my counter-proposal. The reason is because it is confusing to see a lid or dock switch named as "key-lid", etc.Nice point. "switch" I understand, but can you really have "axis" on GPIO keys? I had impression axis is related to joysticks.
I do not think it is very common, but technically we can use gpio-keys to create coarse sliders as follows: - linux,code = ABS_X (or ABS_Y, etc.) - linux,input-type = EV_ABS - linux,input-value = 0, 10, 20... Trying to encode all possible values for linux,input-type (EV_*) in the pattern is not reasonable, so maybe a compromise would be to use 'event' in place of 'key|switch' because events are what we are ultimately trying to describe here. That being said, these are special cases and I don't feel strongly against simply using 'key|switch' for now as those are by far the most common use- cases. Another compromise is 'key|switch|event', with 'event' available as a catch-all for these special cases.
Best regards, Krzysztof
Kind regards, Jeff LaBundy