From e6e87b4bfe3720b4308a8e669078d9be58bc9780 Mon Sep 17 00:00:00 2001 From: David Shaohua Li Date: Wed, 21 Sep 2005 01:35:00 -0400 Subject: [PATCH] [ACPI] properly detect pmtimer on ASUS a8v motherboard Handle FADT 2.0 xpmtmr address 0 case. http://bugzilla.kernel.org/show_bug.cgi?id=5283 Signed-off-by: Shaohua Li Signed-off-by: Andrew Morton Signed-off-by: Len Brown --- arch/i386/kernel/acpi/boot.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c index 76b1135d401..447fa9e33ff 100644 --- a/arch/i386/kernel/acpi/boot.c +++ b/arch/i386/kernel/acpi/boot.c @@ -638,6 +638,13 @@ static int __init acpi_parse_fadt(unsigned long phys, unsigned long size) return 0; pmtmr_ioport = fadt->xpm_tmr_blk.address; + /* + * "X" fields are optional extensions to the original V1.0 + * fields, so we must selectively expand V1.0 fields if the + * corresponding X field is zero. + */ + if (!pmtmr_ioport) + pmtmr_ioport = fadt->V1_pm_tmr_blk; } else { /* FADT rev. 1 */ pmtmr_ioport = fadt->V1_pm_tmr_blk; -- 2.41.0