Patch set updated for coreboot: 04f152f mainboard/google/parrot: fix ACPI interrupt storm on lid switch change

[Andrew Litt]

Andrew Litt ([e-mail]) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/6858

-gerrit

commit 04f152f863b476cb93e39c7fa8e71ec211f62009
Author: Andrew Litt 
Date:   Tue Sep 9 10:49:19 2014 -0500

mainboard/google/parrot: fix ACPI interrupt storm on lid switch change

This fixes the ACPI interrupt storm on Parrot that happens when
    closing the lid or entering suspend by lid close (seen in
    /sys/firmware/acpi/interrupts/gpe1F). This patch inverts the interrupt
    trigger level every time the interrupt is received so that it doesn't fire
    until the next state change.  http://askubuntu.com/questions/310196
    is a good example of what this is trying to solve.

Change-Id: I8b095914e9330c3217a4ceb058613fa952f4a234
    Signed-off-by: Andrew Litt 
---
 src/mainboard/google/parrot/acpi/mainboard.asl | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/mainboard/google/parrot/acpi/mainboard.asl b/src/mainboard/google/parrot/acpi/mainboard.asl
index 4ab9733..503e44b 100644
--- a/src/mainboard/google/parrot/acpi/mainboard.asl
+++ b/src/mainboard/google/parrot/acpi/mainboard.asl
@@ -22,6 +22,13 @@
 Scope (_GPE) {
    Method(_L1F, 0x0, NotSerialized)
    {
+		/*
+		 * Invert the interrupt level bit for the lid GPIO
+		 * so we don't get another _SB.LID0 until the state
+		 * changes again. GIV1 is the interrupt level control
+		 * register for GPIO bits 15:8
+		 */
+		Xor(GIV1, 0x80, GIV1)
    	Notify(_SB.LID0,0x80)
    }
 }