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ec/chromeec: Fix battery ACPI mutex level 

Commit 07fe618 [chromeec: Add support for reading second battery info]
added a mutex as part of the ACPI code to determine battery statuses.

Windows is extremely picky about ACPI code, and attempting to acquire
a level 1 mutex without first having acquired a level 0 mutex causes
Windows to hang on boot. Since there's no reason to use a level 1
mutex here, change it to level 0.

Test: Boot Windows on device with ChromeEC without hanging

Change-Id: Icfb0817cfe0c49eb4527a12b507362939a6d32c6
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/23697
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
This commit is contained in:
Matt DeVillier 2018-02-11 16:07:12 -06:00 committed by Duncan Laurie
parent 3be35976d6
commit 047b23fc31
1 changed files with 1 additions and 1 deletions
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2
src/ec/google/chromeec/acpi/battery.asl
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@ -17,7 +17,7 @@
// Scope (EC0)
/* Mutex for EC battery index interface */
Mutex (BATM, 1)
Mutex (BATM, 0)
// Wait for desired battery index to be presented in shared memory
// Arg0 = battery index