diff options
Diffstat (limited to 'board/spring')
| -rw-r--r-- | board/spring/usb_charging.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/board/spring/usb_charging.c b/board/spring/usb_charging.c index ce864e1d9f..cf17170129 100644 --- a/board/spring/usb_charging.c +++ b/board/spring/usb_charging.c @@ -39,6 +39,7 @@ #define I_LIMIT_3000MA 0 /* PWM control loop parameters */ +#define PWM_CTRL_MAX_DUTY 96 /* Minimum current for dead battery */ #define PWM_CTRL_BEGIN_OFFSET 30 #define PWM_CTRL_OC_MARGIN 15 #define PWM_CTRL_OC_DETECT_TIME (800 * MSEC) @@ -249,6 +250,8 @@ void board_pwm_nominal_duty_cycle(int percent) if (battery_current(&dummy)) board_pwm_duty_cycle(percent); + else if (percent + PWM_CTRL_BEGIN_OFFSET > PWM_CTRL_MAX_DUTY) + board_pwm_duty_cycle(PWM_CTRL_MAX_DUTY); else board_pwm_duty_cycle(percent + PWM_CTRL_BEGIN_OFFSET); nominal_pwm_duty = percent; |