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| author | Tinghan Shen <tinghan.shen@mediatek.com> | 2021-08-27 11:11:49 +0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-09-06 11:46:38 +0000 |
| commit | a478fe1facb7ac8165678fa877a35a7f9c7d742f (patch) | |
| tree | 2c2be503377d4500fcec8b4e1d02918a27af96a3 | |
| parent | c2b7a7dd3eb4c96bc35904ba0d5cb874ec60178c (diff) | |
| download | chrome-ec-a478fe1facb7ac8165678fa877a35a7f9c7d742f.tar.gz | |
chip/mt_scp: mt8195 uses 32k clock when AP suspend
Use 32k clock instead of ULPOSC can significantly reduce the power
consumption of SCP under S3 stage, and still able to kick SCP WDT.
BRANCH=none
BUG=b:197937562
TEST=low scp power in S3 stage
Change-Id: If2f68a5b11e93c7e6badf2e4893f649700b5af2e
Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3131409
Reviewed-by: Tzung-Bi Shih <tzungbi@chromium.org>
Commit-Queue: Tzung-Bi Shih <tzungbi@chromium.org>
| -rw-r--r-- | chip/mt_scp/mt8195/clock.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/chip/mt_scp/mt8195/clock.c b/chip/mt_scp/mt8195/clock.c index 9d341536a6..c6bf3cbc79 100644 --- a/chip/mt_scp/mt8195/clock.c +++ b/chip/mt_scp/mt8195/clock.c @@ -377,7 +377,7 @@ power_chipset_handle_host_sleep_event(enum host_sleep_event state, { if (state == HOST_SLEEP_EVENT_S3_SUSPEND) { CPRINTS("AP suspend"); - clock_select_clock(SCP_CLK_ULPOSC2_LOW_SPEED); + clock_select_clock(SCP_CLK_32K); } else if (state == HOST_SLEEP_EVENT_S3_RESUME) { CPRINTS("AP resume"); clock_select_clock(SCP_CLK_ULPOSC2_HIGH_SPEED); |