TIM_BDTR_BK2P     496 drivers/pwm/pwm-stm32.c 				: TIM_BDTR_BK2E | TIM_BDTR_BK2P | TIM_BDTR_BK2F;
TIM_BDTR_BK2P     504 drivers/pwm/pwm-stm32.c 		bdtr |= TIM_BDTR_BKP | TIM_BDTR_BK2P;