OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ACPI: resume: re-enable SCI-enable workaround 

The BIOS bug workaround mistakenly got disabled
when we followed the ACPI specification more closely
by ignoring OS updates to that bit.

(The BIOS is supposed to update SCI_EN, not the OS)

http://bugzilla.kernel.org/show_bug.cgi?id=13289

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Lin Ming 2009-05-15 22:27:49 -04:00 committed by Len Brown
parent 091bf7624d
commit 975b3c474c
1 changed files with 6 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/acpi/acpica/aclocal.h
View File

@ -787,7 +787,12 @@ struct acpi_bit_register_info {
/* For control registers, both ignored and reserved bits must be preserved */
#define ACPI_PM1_CONTROL_IGNORED_BITS 0x0201 /* Bits 9, 0(SCI_EN) */
/*
* The ACPI spec says to ignore PM1_CTL.SCI_EN (bit 0)
* but we need to be able to write ACPI_BITREG_SCI_ENABLE directly
* as a BIOS workaround on some machines.
*/
#define ACPI_PM1_CONTROL_IGNORED_BITS 0x0200 /* Bits 9 */
#define ACPI_PM1_CONTROL_RESERVED_BITS 0xC1F8 /* Bits 14-15, 3-8 */
#define ACPI_PM1_CONTROL_PRESERVED_BITS \
(ACPI_PM1_CONTROL_IGNORED_BITS | ACPI_PM1_CONTROL_RESERVED_BITS)