Mike Loptien (mike.loptien@se-eng.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/2488
-gerrit
commit c4d3d4517331a5fa735cfa05c43265f260dbd5d6 Author: Mike Loptien mike.loptien@se-eng.com Date: Fri Feb 22 13:18:31 2013 -0700
AMD/Persimmon: Add RTC init to CIMX SB800
Adding RTC init code to the Southbridge initialization code in 'late.c'. This initializes the RTC so that the Date Alarm register is set to a valid value (0x00) at startup. By setting the Date Alarm register to 0x00, it does not get evaluated along with the seconds, minutes, and hours when running 'fwts s3'. Information about fwts (Firmware Test Suite) can be found here: https://wiki.ubuntu.com/Kernel/Reference/fwts
This was tested on a Persimmon but will apply to other mainboards as well.
Change-Id: I9a11bc3f9e3f53c46e7a4d72e62ebb0a4ba1bfe4 Signed-off-by: Mike Loptien mike.loptien@se-eng.com --- src/southbridge/amd/cimx/sb800/late.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/src/southbridge/amd/cimx/sb800/late.c b/src/southbridge/amd/cimx/sb800/late.c index ef3a34b..0d9b5ef 100644 --- a/src/southbridge/amd/cimx/sb800/late.c +++ b/src/southbridge/amd/cimx/sb800/late.c @@ -128,6 +128,13 @@ static void lpc_init(device_t dev)
rtc_check_update_cmos_date(RTC_HAS_ALTCENTURY);
+ /* Initialize the real time clock. + * The 0 argument tells rtc_init not to + * update CMOS unless it is invalid. + * 1 tells rtc_init to always initialize the CMOS. + */ + rtc_init(0); + printk(BIOS_DEBUG, "SB800 - Late.c - lpc_init - End.\n"); }