google/chromeec: Add common infrastructure for boot-mode switches

Instead of defining the same functions for reading/clearing boot-mode
switches from EC in every mainboard, add a common infrastructure to
enable common functions for handling boot-mode switches if
GOOGLE_CHROMEEC is being used.

Only boards that were not moved to this new infrastructure are those
that do not use GOOGLE_CHROMEEC or which rely on some mainboard specific
mechanism for reading boot-mode switches.

TEST=abuild compiles all boards successfully with and without ChromeOS

Change-Id: I267aadea9e616464563df04b51a668b877f0d578
Signed-off-by: Furquan Shaikh <>
Tested-by: build bot (Jenkins)
Reviewed-by: Julius Werner <>
50 files changed