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mb/siemens/mc_bdx1: Set up RTC backup mode to primary cell 

The used RTC6110SA has issues to enter backup mode when the power supply
decreases too slow when the mainboard is turned off. Switch to backup
mode "primary cell" to make sure backup mode will be entered correctly
on power-off. In addition set IOCUTEN to minimize the backup current
consumption of the RTC.

Change-Id: I9733aa9f2981a25f6d42279eff0c4980e5eb5a5a
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/20413
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Werner Zeh 2017-06-29 08:56:45 +02:00
parent 6e6261e893
commit c439109359
1 changed files with 4 additions and 1 deletions
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5
src/mainboard/siemens/mc_bdx1/devicetree.cb
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@ -12,7 +12,10 @@ chip soc/intel/fsp_broadwell_de
device pci 1f.3 on
# Enable external RTC chip
chip drivers/i2c/rx6110sa
register "cof_selection" = "0"
register "pmon_sampling" = "PMON_SAMPL_256_MS"
register "bks_on" = "0"
register "bks_off" = "1"
register "iocut_en" = "1"
register "set_user_date" = "1"
register "user_year" = "04"
register "user_month" = "07"