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sb/lynxpoint/gpio: fix interrupt storm 

On newer kernels (> 4.9 LTS), the GPIO ACPI device's interrupt
resource causes an interrupt storm which prevents the CPU
from properly idling, significantly increasing power consumption.
This was fixed for soc/broadwell (which also supports lynxpoint-lp)
by removing the interrupt resource, so apply the same fix here.

Original fix: https://chromium-review.googlesource.com/203645

Test: build/boot google/wolf, verify CPU0 idles correctly and
power consumption drop via powertop in kernels 4.16.18 and 5.x.

Change-Id: Ic4963f2f0225b5f44a7604b0107911640345c855
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39578
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Matt DeVillier 2020-03-15 17:11:18 -05:00 committed by Patrick Georgi
parent 0ae21ff7ff
commit 7790cb680a
1 changed files with 3 additions and 2 deletions
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5
src/southbridge/intel/lynxpoint/acpi/serialio.asl
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@ -551,8 +551,9 @@ Device (GPIO)
, // ResourceSourceIndex , // ResourceSourceIndex
, // ResourceSource , // ResourceSource
BAR0) BAR0)
Interrupt (ResourceConsumer, // Disabled due to IRQ storm: http://crosbug.com/p/29548
Level, ActiveHigh, Shared, , ,) {14} //Interrupt (ResourceConsumer,
// Level, ActiveHigh, Shared, , , ) {14}
}) })
Method (_CRS, 0, NotSerialized) Method (_CRS, 0, NotSerialized)