Thread (6 messages) 6 messages, 4 authors, 2021-05-25

Re: Naming of HID LED devices

From: Pavel Machek <hidden>
Date: 2021-05-21 16:05:00
Also in: linux-leds

Hi!
Earlier this year during review of the hid-playstation driver there
was a discussion on the naming of LEDs exposed by HID drivers. Moving
forward the preference from the LED maintainers was to follow the
naming scheme "device:color:function" instead of the custom names used
so far by HID drivers.

I would like to get some guidance on the naming direction not just for
hid-playstation, but Daniel's hid-nintendo driver for which he posted
a new revision today has the same problem.

The original discussion was on "why not use the input device name?"
(e.g. input15). It was concluded that it wouldn't uniquely identify a
HID device among reasons.
I understand that problem is that one controller is present as
multiple input devices to userspace.

[That is something you might want to fix, BTW. IIRC input protocol is
flexible enough to do that.]

I suggest you simply select one input device (call it primary,
probably the one that contains the master joystick) and use its input
number....

Best regards,
								Pavel
-- 
http://www.livejournal.com/~pavelmachek

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