diff options
Diffstat (limited to 'baseboard/guybrush/baseboard.c')
| -rw-r--r-- | baseboard/guybrush/baseboard.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/baseboard/guybrush/baseboard.c b/baseboard/guybrush/baseboard.c index 12916ba4ef..ab1b092b9a 100644 --- a/baseboard/guybrush/baseboard.c +++ b/baseboard/guybrush/baseboard.c @@ -633,3 +633,22 @@ void board_pwrbtn_to_pch(int level) } gpio_set_level(GPIO_PCH_PWRBTN_L, level); } + +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(SAFE_RESET_VBUS_DELAY_MS); + } +} |