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| author | Alec Berg <alecaberg@chromium.org> | 2015-01-17 11:49:14 -0800 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2015-01-17 23:19:54 +0000 |
| commit | ca228445ccc48b70b6959c38e263867256462a48 (patch) | |
| tree | aed4f3a8bd101b245cc7d92f58ea5d103a55ab0c /board/samus_pd | |
| parent | 7fc407a93437929ec925c3041051a41bd2e83df6 (diff) | |
| download | chrome-ec-ca228445ccc48b70b6959c38e263867256462a48.tar.gz | |
pd: samus: separate macros for power supply on and off delays
Separate macros for defining delays to turn on and off VBUS on the
Raiden ports.
Tune the delays for Samus to provide extra headroom based off of
measured worst case times.
BUG=chrome-os-partner:34525
BRANCH=samus
TEST=load onto samus. connect two samus' and use twinkie to analyze
time between request and PS_RDY on connect and then on a power swap.
Change-Id: I65cec911e34c22a4aad136423362a3a65bc2ab2a
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/241761
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'board/samus_pd')
| -rw-r--r-- | board/samus_pd/usb_pd_config.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/board/samus_pd/usb_pd_config.h b/board/samus_pd/usb_pd_config.h index c30c7d76fc..a2e80aaabd 100644 --- a/board/samus_pd/usb_pd_config.h +++ b/board/samus_pd/usb_pd_config.h @@ -259,11 +259,11 @@ static inline int pd_snk_is_vbus_provided(int port) #define PD_DEFAULT_STATE PD_STATE_SNK_DISCONNECTED /* - * delay for the voltage transition on the power supply, chip max is 16ms. - * delay to turn off the power supply depends on vbus capacitance, but - * is well above that. 80ms seems to work for most devices. + * delay to turn on the power supply max is ~16ms. + * delay to turn off the power supply max is about ~180ms. */ -#define PD_POWER_SUPPLY_TRANSITION_DELAY 80000 /* us */ +#define PD_POWER_SUPPLY_TURN_ON_DELAY 30000 /* us */ +#define PD_POWER_SUPPLY_TURN_OFF_DELAY 250000 /* us */ /* Define typical operating power and max power */ #define PD_OPERATING_POWER_MW 15000 |