On Fri, Apr 17, 2020 at 11:15 PM Lars <la...@apache.org> wrote:
>
> This patch allows controlling multiple fans as if they were a single fan.
>
> This adds P52, P72, X1E, and X1E gen2 to dual fan quirks. Both fans are
> controlled together.
>
> Tested on an X1 Extreme Gen2.
>
> The patch is defensive, it adds only specific supported machines, and falls
> back to the old behavior if both fans cannot be controlled.
> However, it does attempt single fan control for all previously white-listed
> Thinkpads.
>
> Background:
> I tested the BIOS default behavior on my X1E gen2 and both fans are always
> changed together.
> So rather than adding controls for each fan, this controls both fans together
> as the BIOS would do.
>
> This was inspired by a discussion on dual fan support for the thinkfan tool
> (https://github.com/vmatare/thinkfan/issues/58).
> (Thanks to Github users voidworker, and civic9.)
>
> The BIOS ids for P52/P72 and X1E are taken from there. The X1E gen2 id is
> verified on my machine.
>
Thanks for an update. I have pushed it to my review and testing queue, thanks!
JFYI: there are two issues (I have fixed them, no need to resend) with
this. Commit message lines are too long and...
> (In the first version my mail client botched the white-spacing - my
> apologies, this is my first Kernel patch. Used git send-email and gmail this
> time.)
...this kind of comments should go after cut line ('---' below).
> Signed-off-by: Lars <la...@apache.org>
> ---
--
With Best Regards,
Andy Shevchenko
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