sb/amd/cimx/sb800: Get rid of power button device in coreboot

Apply commit d7b88dcb (mb/google/x86-boards: Get rid of power button
device in coreboot) to AMD Brazos boards [1]:

> As per the ACPI specification, there are two types of power button
> devices:
> 1. Fixed hardware power button
> 2. Generic hardware power button
>
> Fixed hardware power button is added by the OSPM if POWER_BUTTON flag
> is not set in FADT by the BIOS. This device has its programming model
> in PM1x_EVT_BLK. All ACPI compliant OSes are expected to add this
> power button device by default if the power button FADT flag is not
> set.
>
> On the other hand, generic hardware power button can be used by
> platforms if fixed register space cannot be used for the power button
> device. In order to support this, power button device object with HID
> PNP0C0C is expected to be added to ACPI tables. Additionally,
> POWER_BUTTON flag should be set to indicate the presence of control
> method for power button.
[..]
> This change gets rid of the generic hardware power button from all
> google mainboards and relies completely on the fixed hardware power
> button.

The same problem exists with the AMD Hudson devices in coreboot.

For AMD Hudson (2) and Yangtze based devices this was removed in commit
44f2fab8 (AMD hudson and yangtze boards: Let mainboard declare power
button) [2].

Two devices are detected.

    $ dmesg | grep Button
    [    0.209213] input: Power Button as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
    [    0.209254] ACPI: Power Button [PWRB]
    [    0.209332] input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input1
    [    0.209349] ACPI: Power Button [PWRF]

   $ sudo evtest
    No device specified, trying to scan all of /dev/input/event*
    Available devices:
    /dev/input/event0:      Power Button
    /dev/input/event1:      Power Button
    [..]

[1]: https://review.coreboot.org/5546
[2]: https://review.coreboot.org/27272

Change-Id: I0cbecb72f7e1bf3d051d3b7656c6af4d6f43b497
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/27496
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 0 insertions, 9 deletions

diff --git a/src/mainboard/elmex/pcm205400/acpi/gpe.asl b/src/mainboard/elmex/pcm205400/acpi/gpe.asl
index 30e6fdcb3c..3cf38c035a 100644
--- a/src/mainboard/elmex/pcm205400/acpi/gpe.asl
+++ b/src/mainboard/elmex/pcm205400/acpi/gpe.asl
@@ -15,12 +15,6 @@
 
 Scope(\_GPE) {	/* Start Scope GPE */
 
-	/*  General event 3  */
-	Method(_L03) {
-		/* DBGO("\\_GPE\\_L00\n") */
-		Notify(\_SB.PWRB, 0x02) /* NOTIFY_DEVICE_WAKE */
-	}
-
 	/*  Legacy PM event  */
 	Method(_L08) {
 		/* DBGO("\\_GPE\\_L08\n") */
@@ -42,7 +36,6 @@ Scope(\_GPE) {	/* Start Scope GPE */
 		Notify(\_SB.PCI0.UOH5, 0x02) /* NOTIFY_DEVICE_WAKE */
 		Notify(\_SB.PCI0.UOH6, 0x02) /* NOTIFY_DEVICE_WAKE */
 		Notify(\_SB.PCI0.UEH1, 0x02) /* NOTIFY_DEVICE_WAKE */
-		Notify(\_SB.PWRB, 0x02) /* NOTIFY_DEVICE_WAKE */
 	}
 
 	/*  ExtEvent0 SCI event  */
@@ -63,14 +56,12 @@ Scope(\_GPE) {	/* Start Scope GPE */
 		Notify(\_SB.PCI0.PBR5, 0x02) /* NOTIFY_DEVICE_WAKE */
 		Notify(\_SB.PCI0.PBR6, 0x02) /* NOTIFY_DEVICE_WAKE */
 		Notify(\_SB.PCI0.PBR7, 0x02) /* NOTIFY_DEVICE_WAKE */
-		Notify(\_SB.PWRB, 0x02) /* NOTIFY_DEVICE_WAKE */
 	}
 
 	/*  Azalia SCI event  */
 	Method(_L1B) {
 		/* DBGO("\\_GPE\\_L1B\n") */
 		Notify(\_SB.PCI0.AZHD, 0x02) /* NOTIFY_DEVICE_WAKE */
-		Notify(\_SB.PWRB, 0x02) /* NOTIFY_DEVICE_WAKE */
 	}
 }	/* End Scope GPE */