diff options
| author | Alec Berg <alecaberg@chromium.org> | 2015-10-22 11:37:05 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2015-10-23 10:10:56 -0700 |
| commit | 847978564a3ac343c191be94e7a83076ead33f70 (patch) | |
| tree | d2b5292d9b3280b888fc3d8249d70dbe760a18ab /common/usb_charger.c | |
| parent | accc98d7c3fdcad6e35ac2ebeb63fbda3abf8d2e (diff) | |
| download | chrome-ec-847978564a3ac343c191be94e7a83076ead33f70.tar.gz | |
pd: send soft reset on boot if VBUS is present
On boot, if VBUS is present, then when PD protocol gets to
SNK_DISCOVERY state, if it times out waiting for source cap,
then send attempt to send a soft reset first instead of
directly sending a hard reset. This allows us to not lose
VBUS in the case that we were in a stable contract as a sink
before this boot (for example a sysjump or EC reboot).
BUG=chrome-os-partner:44085, chrome-os-partner:44952
BRANCH=none
TEST=test on glados and samus. test by sysjumping between
RO and RW with zinger plugged in and no battery, and verify
that we don't lose power. also test rebooting with a battery
and verify we don't lose power. also tested with a third
party PD charger.
Change-Id: Ib7ce46d8b9843db66805ba3237d8919d611324e0
Signed-off-by: Alec Berg <alecaberg@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/308201
Reviewed-by: Rong Chang <rongchang@chromium.org>
Diffstat (limited to 'common/usb_charger.c')
| -rw-r--r-- | common/usb_charger.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/common/usb_charger.c b/common/usb_charger.c index 0474bc18b8..b22e8dc99d 100644 --- a/common/usb_charger.c +++ b/common/usb_charger.c @@ -82,6 +82,8 @@ void usb_charger_set_switches(int port, enum usb_switch setting) void usb_charger_vbus_change(int port, int vbus_level) { + /* If VBUS has transitioned low, notify PD module directly */ + pd_vbus_low(port); /* Update VBUS supplier and signal VBUS change to USB_CHG task */ update_vbus_supplier(port, vbus_level); #if CONFIG_USB_PD_PORT_COUNT == 2 |