gma broxton: Add signal level control for DDI PHYs

Other than for the DDIs of the Core processor series, we don't select
signal levels from a preconfigured set but have to program the indivi-
dual values.

Change-Id: I3ab4d5e2ed47db0d4ce47a17c4a5fb08b5416bc2
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/18425
Tested-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
3 files changed
tree: e20caca16f761188abb51d83efec2ec06ccb8afd
  1. common/
  2. configs/
  3. .gitignore
  4. COPYING
  5. Makefile
  6. Makefile.inc
  7. TODO