KVASER_PCIEFD_KCAN_PWM_TRIGGER_MASK
pwm_ctrl |= FIELD_PREP(KVASER_PCIEFD_KCAN_PWM_TRIGGER_MASK, top);
pwm_ctrl = FIELD_PREP(KVASER_PCIEFD_KCAN_PWM_TRIGGER_MASK, top);
pwm_ctrl = FIELD_PREP(KVASER_PCIEFD_KCAN_PWM_TRIGGER_MASK, trigger);