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cr50: add delay after soft reset

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Add a delay to allow the clocks and usb signals to settle.

BUG=b:63767046,b:63867566
BRANCH=cr50
TEST=put the eve ec into hibernate, wait until cr50 enters deep sleep,
use the uart to wake it up, and verify that it eventually reenters deep
sleep

Change-Id: I26463ce3e00996368a791a245b0f9de01737478c
Signed-off-by: Mary Ruthven <mruthven@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/598448
Reviewed-by: Marius Schilder <mschilder@chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>
This commit is contained in:
Mary Ruthven
2017-08-01 15:30:54 -07:00
committed by chrome-bot
parent 321625dc11
commit a0c2fa80cd
1 changed files with 9 additions and 0 deletions
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9
chip/g/usb.c
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@@ -1209,6 +1209,15 @@ static void usb_softreset(void)
return;
}
/* TODO: Wait 3 PHY clocks before returning */
#ifdef BOARD_CR50
/*
* TODO(b/63867566): This delay is added to get usb to suspend after
* resume from deep sleep. Find out what the root cause is and add a
* fix.
*/
usleep(100);
#endif
}
void usb_connect(void)