diff options
Diffstat (limited to 'baseboard/zork/baseboard.c')
| -rw-r--r-- | baseboard/zork/baseboard.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/baseboard/zork/baseboard.c b/baseboard/zork/baseboard.c index 4a482a42cb..c4715a943a 100644 --- a/baseboard/zork/baseboard.c +++ b/baseboard/zork/baseboard.c @@ -10,6 +10,7 @@ #include "button.h" #include "cbi_ec_fw_config.h" #include "charge_manager.h" +#include "charge_ramp.h" #include "charge_state.h" #include "charge_state_v2.h" #include "common.h" @@ -46,6 +47,13 @@ #define SAFE_RESET_VBUS_MV 5000 +/* + * For legacy BC1.2 charging with CONFIG_CHARGE_RAMP_SW, ramp up input current + * until voltage drops to 4.5V. Don't go lower than this to be kind to the + * charger (see b/67964166). + */ +#define BC12_MIN_VOLTAGE 4500 + const enum gpio_signal hibernate_wake_pins[] = { GPIO_LID_OPEN, GPIO_AC_PRESENT, @@ -348,3 +356,17 @@ void board_pwrbtn_to_pch(int level) } gpio_set_level(GPIO_PCH_PWRBTN_L, level); } + +/** + * Return if VBUS is sagging too low + */ +int board_is_vbus_too_low(int port, enum chg_ramp_vbus_state ramp_state) +{ + int voltage; + + if (charger_get_vbus_voltage(port, &voltage)) + voltage = 0; + ccprints("vbus %d", voltage); + + return voltage < BC12_MIN_VOLTAGE; +} |