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From: Armin Wolf <W_Armin@gmx.de>
To: linux-leds@vger.kernel.org, Werner Sembach <wse@tuxedocomputers.com>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Maximum values for multi_intensity sysfs attribute
Date: Sat, 14 Feb 2026 20:15:40 +0100	[thread overview]
Message-ID: <2d91a44e-fce2-42dc-b529-133ab4a191f0@gmx.de> (raw)

Hello,

i am currently adding support for RGB keyboard backlight control to the uniwill-laptop
driver, and want to use the multicolor LED class for that. However the hardware interface
is a bit exotic:

- 5 global brightness levels
- 50 intensity levels for each R/G/B channel

I am now asking myself how this should be mapped onto the multi_intensity sysfs attribute.
Should i set max_brightness to 5 and reject intensity values larger that 50? Or should
i set max_brightness to 50 and interpolate? What is the input range of intensity values?

Thanks,
Armin Wolf


             reply	other threads:[~2026-02-14 19:15 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-14 19:15 Armin Wolf [this message]
2026-03-03 20:11 ` Armin Wolf
2026-03-03 20:35   ` Werner Sembach
2026-03-03 20:43     ` Werner Sembach
2026-03-04 11:45 ` Pőcze Barnabás
2026-03-04 11:58   ` Werner Sembach

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