The previous driver was a bit awkward and not entirely correct. This change
primarily replaces the read/write functions with simpler and more robust
(hopefully) version.
BUG=chrome-os-partner:19420
TEST=Built and booted on pit into the RAM stage without any errors reading or
writing registers on the PMIC. There isn't really any direct feedback from the
PMIC, so I'm assuming since it didn't complain it worked. I looked at some of
the transaction on an oscilloscope and they looked correct.
BRANCH=None
Change-Id: I01b1f9ea43eafb4aae1dbebddc051cd5ec5aea74
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/59201
Reviewed-by: Ronald G. Minnich <rminnich@chromium.org>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
28603b21d4