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| author | Philip Chen <philipchen@google.com> | 2018-02-28 17:13:18 -0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2018-03-02 15:47:00 -0800 |
| commit | 6589e15e424f6a56f370a89e322240a1375839c7 (patch) | |
| tree | 4be6e3e85941c9e53f8491575e85f294699e9c10 /board/scarlet | |
| parent | 69c18ad6a6a77ea1c82465e6420280c8cf55b12f (diff) | |
| download | chrome-ec-6589e15e424f6a56f370a89e322240a1375839c7.tar.gz | |
scarlet: Turn off ADC after board version is read
We can turn off ADC after the first successful read for board version.
A few milliwatts saved is important when Scarlet is in S3.
BUG=b:72160379
BRANCH=scarlet
TEST=Try 'version' command a few times on EC console and see
correct board version.
Change-Id: Id2bef415f161431ed895f49db30d50347479176d
Signed-off-by: Philip Chen <philipchen@google.com>
Reviewed-on: https://chromium-review.googlesource.com/942377
Commit-Ready: Philip Chen <philipchen@chromium.org>
Tested-by: Philip Chen <philipchen@chromium.org>
Reviewed-by: Scott Collyer <scollyer@chromium.org>
Reviewed-by: Derek Basehore <dbasehore@chromium.org>
Diffstat (limited to 'board/scarlet')
| -rw-r--r-- | board/scarlet/board.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/board/scarlet/board.c b/board/scarlet/board.c index 4d55ebfee0..6734f92792 100644 --- a/board/scarlet/board.c +++ b/board/scarlet/board.c @@ -340,6 +340,14 @@ int board_get_version(void) } } + /* + * Disable ADC module after we detect the board version, + * since this is the only thing ADC module needs to do + * for this board. + */ + if (version != BOARD_VERSION_UNKNOWN) + adc_disable(); + return version; } |