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| author | Jiri Kosina <jkosina@suse.cz> | 2013-01-29 13:48:30 +0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2013-01-29 13:48:30 +0400 |
| commit | 617677295b53a40d0e54aac4cbbc216ffbc755dd (patch) | |
| tree | 51b9e87213243ed5efff252c8e8d8fec4eebc588 /drivers/input/serio/i8042-x86ia64io.h | |
| parent | 5c8d1b68e01a144813e38795fe6dbe7ebb506131 (diff) | |
| parent | 6abb7c25775b7fb2225ad0508236d63ca710e65f (diff) | |
| download | linux-617677295b53a40d0e54aac4cbbc216ffbc755dd.tar.xz | |
Merge branch 'master' into for-next
Conflicts:
drivers/devfreq/exynos4_bus.c
Sync with Linus' tree to be able to apply patches that are
against newer code (mvneta).
Diffstat (limited to 'drivers/input/serio/i8042-x86ia64io.h')
| -rw-r--r-- | drivers/input/serio/i8042-x86ia64io.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/input/serio/i8042-x86ia64io.h b/drivers/input/serio/i8042-x86ia64io.h index d6cc77a53c7e..5f306f79da0c 100644 --- a/drivers/input/serio/i8042-x86ia64io.h +++ b/drivers/input/serio/i8042-x86ia64io.h @@ -921,6 +921,7 @@ static int __init i8042_platform_init(void) int retval; #ifdef CONFIG_X86 + u8 a20_on = 0xdf; /* Just return if pre-detection shows no i8042 controller exist */ if (!x86_platform.i8042_detect()) return -ENODEV; @@ -960,6 +961,14 @@ static int __init i8042_platform_init(void) if (dmi_check_system(i8042_dmi_dritek_table)) i8042_dritek = true; + + /* + * A20 was already enabled during early kernel init. But some buggy + * BIOSes (in MSI Laptops) require A20 to be enabled using 8042 to + * resume from S3. So we do it here and hope that nothing breaks. + */ + i8042_command(&a20_on, 0x10d1); + i8042_command(NULL, 0x00ff); /* Null command for SMM firmware */ #endif /* CONFIG_X86 */ return retval; |