Re: [PATCH 00/10] fujitsu-laptop: use device-specific data instead of module-wide globals

From: Andy Shevchenko
Date: Sat May 06 2017 - 10:22:03 EST

On Sat, May 6, 2017 at 3:45 PM, MichaÅ KÄpieÅ <kernel@xxxxxxxxxx> wrote:

> To be fair, one thing that may be "unnatural" with this approach is that
> even though fujitsu-backlight would depend on fujitsu-laptop, it would
> still have to get a handle to FUJ02E3 using:
> acpi_get_handle(NULL, "\\_SB.FEXT", ...)
> because call_fext_func() - and thus fext_backlight() - needs to be
> passed a handle to FUJ02E3 and the two ACPI devices (FUJ02B1 handled by
> fujitsu-backlight and FUJ02E3 handled by fujitsu-laptop) are not related
> from the perspective of the ACPI device hierarchy. Unless there is a
> better way of implementing this, in which case I am open to suggestions.

There are two areas to check with:
1. Remote graph node
2. Component framework (only works in case when all devices are
mandatory to have).

With Best Regards,
Andy Shevchenko