git: atkbdc - Do not attach PS2 controller via legacy ISA bus, if FADT says so.

[Imre Vadasz]

commit 131acb0380e93664f106117ebf8ba322a3d1b7c4
Author: Imre Vadász <imre at vdsz.com>
Date:   Thu Feb 1 13:16:55 2018 +0100

    atkbdc - Do not attach PS2 controller via legacy ISA bus, if FADT says so.
    
    * If the FADT BootFlags value tells us that we shouldn't expect the PS2
      controller to be at the IO ports 0x60/0x64, we should instead only attach
      the atkbdc driver when there is a matching device in the ACPI namespace.
    
    * This avoids attempts to attach the atkbdc PS2 controller driver on
      hardware which doesn't have a usable PS2 controller. This happens on
      many modern notebooks, and has been the case for some time on desktop
      hardware that doesn't provide an emulated PS2 controller for using USB
      input devices all the time (it either is never initialized, or might
      get disabled by some of the ACPI or USB initialization during bootup).

Summary of changes:
 sys/dev/misc/atkbdc_layer/atkbdc_isa.c | 19 ++++++++++++++++++-
 sys/dev/misc/kbd/atkbdc.c              | 25 +++++++++++++++++++++++++
 sys/platform/pc64/acpica/acpi_fadt.c   | 13 +++++++++++++
 3 files changed, 56 insertions(+), 1 deletion(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/131acb0380e93664f106117ebf8ba322a3d1b7c4


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