From 071182ade30da4bdba6da03ce79abf8df91ee480 Mon Sep 17 00:00:00 2001 From: Mathew King Date: Tue, 2 Jun 2020 12:27:06 -0600 Subject: ec/google/wilco: Always use current value of battery status bit According to the Wilco EC spec the BTSC bit of PWSR is always cleared when PWSR is read so that battery status change events are only triggered one time. Testing of the Wilco EC has verified this behavior. This changes the way in which the battery status change bit is used from checking the bit state against the previous value to always issuing a battery event when the BTSC bit is set. The other bits in PWSR indicate state directly and do not behave like the BTSC bit. BUG=b:157113138 TEST=Deploy on Drallion and verify that battery events are generated BRANCH=drallion, sarien Signed-off-by: Mathew King Change-Id: I8fbf2ee1158ddd790b04a20b1eb27a6cce4f5c81 Reviewed-on: https://review.coreboot.org/c/coreboot/+/42017 Tested-by: build bot (Jenkins) Reviewed-by: Duncan Laurie --- src/ec/google/wilco/acpi/event.asl | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'src/ec') diff --git a/src/ec/google/wilco/acpi/event.asl b/src/ec/google/wilco/acpi/event.asl index a98344dd06..bf4bb19be7 100644 --- a/src/ec/google/wilco/acpi/event.asl +++ b/src/ec/google/wilco/acpi/event.asl @@ -25,7 +25,11 @@ Method (ECQP, 0, Serialized) } } - If (EBIT (BTSC, Local1)) { + /* + * Battery status is cleared when read so always use the value from + * PWSR directly regardless of the previous value stored in ECPR. + */ + If (EBIT (BTSC, Local0)) { Printf ("BAT0 Status Change") Notify (BAT0, 0x80) } -- cgit v1.2.3