Randall Spangler e5f4032866 Clean up USB external power module ...

Make internal APIs static, and remove board_ prefix for clarity.

Move TSU6721 calls from charger task to extpower_usb functions for
better encapsulation.

No functional changes, just moving code.  Yes, this will make
cherry-picking back from spring to TOT less convenient, but now the
code is more readable and it will make maintaining the PMU code easier
as we add boards.

BUG=chrome-os-partner:18343
BRANCH=none
TEST=build spring

Change-Id: I52b37e57fc8519859996a110b0503277c6f0bbc8
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/47657

2013-04-10 14:24:10 -07:00

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