> Date: Fri, 14 Nov 2025 08:33:02 -0600
> From: joshua stein <jcs@jcs.org>
> 
> On Thu, 13 Nov 2025 at 22:09:09 -0500, Bryan Steele wrote:
> > On Thu, Nov 13, 2025 at 08:15:16PM -0600, joshua stein wrote:
> > > This moves aplhidev out of arch/arm64 and into dev/spi, adds 
> > > attachment via ACPI through ispi, enables it on amd64, and adds 
> > > support for adjusting keyboard backlight through 'wsconsctl 
> > > keyboard.backlight'.
> > > 
> > > Tested on a 2017 MacBook 12".  Hopefully it didn't break anything on 
> > > Apple M* arm64 laptops and I'm curious if the keyboard backlight 
> > > support also works there.
> > 
> > 
> > I haven't tested your diff, but at least on Apple M1 there is are
> > seperate pwm(4)/pwmled(4) drivers that handle the keyboard backlight
> > which this may conflict with.
> 
> Ah, ok.  I'll make the keyboard backlight stuff only take over on 
> the !fdt attachment.

Is the keyboard backlight stuff described in the HID descriptors?