diff options
| author | Gaggery Tsai <gaggery.tsai@intel.com> | 2018-01-22 11:17:28 +0800 |
|---|---|---|
| committer | Stefan Reinauer <stefan.reinauer@coreboot.org> | 2018-01-24 00:44:30 +0000 |
| commit | 63278ab07d684f90804065a6351e0d138f09b507 (patch) | |
| tree | 7d8aa7dd74bdacaf5770b7e1972d52b331307095 /util | |
| parent | 94ef4a8a476a66931eb2b2f7f8573fed52956d0f (diff) | |
mb/google/fizz: Add AC/DC loadline settings
This patch adds AC and DC loadline settings since vr_config_enable is
set. Without correct AD/DC loadline settings, VRs reported incorrect
VID values which caused CPU freqency clipping. The clipping reason
could be retrieved from MSR 0x64F. From VRTT report, the AC/DC
loadline resistances are within spec, we can use default value defined
in Table 6-1, doc #543977.
BUG=b:70646304
BRANCH=None
TEST=emerge-fizz coreboot chromeos-bootimage & Read AC/DC loadline
settings from DCI to ensure the values were programmed correctly.
Change-Id: Id0ce29fa5726ca3711aa4c822fb123e2de7bc48f
Signed-off-by: Gaggery Tsai <gaggery.tsai@intel.com>
Reviewed-on: https://review.coreboot.org/23349
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'util')
0 files changed, 0 insertions, 0 deletions