Re: [PATCH] platform/x86: add support for Acer Predator LEDs

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On 16.06.21 00:19, leo60228 wrote:

Hi,

The Acer Predator Helios 500's keyboard has four zones of RGB LEDs.

This driver allows them to be controlled from Linux.

have you checked whether these LEDs are behind a GPIO controller (possibly in the SoC itself), that's potentially used for other things,
too ?

If that's the case, we might run into trouble when one's implementing
an gpio driver and using it with generic drivers (eg. buttons).

I've haven't got a data sheet for the i9-11900 yet, but I'm quite sure
it does have gpios and suspect they're used for those things, as well
as extra keys, etc. This is a usual approach for such mainboards.

You can get a better idea by looking at the acpi methods - look out for
some other methods accessing very nearby registers.

Oh, and have you checked whether there're also some gpio definitions
in the acpi tables ? It's relatively new but some vendors already using
it.


--mtx

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Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
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