diff options
| -rw-r--r-- | baseboard/zork/baseboard.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/baseboard/zork/baseboard.c b/baseboard/zork/baseboard.c index ac89f9d4a5..66f1fa1583 100644 --- a/baseboard/zork/baseboard.c +++ b/baseboard/zork/baseboard.c @@ -59,6 +59,8 @@ #define CPRINTSUSB(format, args...) cprints(CC_USBCHARGE, format, ## args) #define CPRINTFUSB(format, args...) cprintf(CC_USBCHARGE, format, ## args) +#define SAFE_RESET_VBUS_MV 5000 + const enum gpio_signal hibernate_wake_pins[] = { GPIO_LID_OPEN, GPIO_AC_PRESENT, @@ -906,3 +908,22 @@ static void baseboard_init(void) setup_fans(); } DECLARE_HOOK(HOOK_INIT, baseboard_init, HOOK_PRIO_DEFAULT); + +void board_hibernate(void) +{ + int port; + + /* + * If we are charging, then drop the Vbus level down to 5V to ensure + * that we don't get locked out of the 6.8V OVLO for our PPCs in + * dead-battery mode. This is needed when the TCPC/PPC rails go away. + * (b/79218851, b/143778351, b/147007265) + */ + port = charge_manager_get_active_charge_port(); + if (port != CHARGE_PORT_NONE) { + pd_request_source_voltage(port, SAFE_RESET_VBUS_MV); + + /* Give PD task and PPC chip time to get to 5V */ + msleep(300); + } +} |