grcan_read_bits
if (!grcan_read_bits(®s->txctrl, GRCAN_TXCTRL_ONGOING) ||
if (grcan_read_bits(®s->conf, GRCAN_CONF_SAM)) {
if (grcan_read_bits(®s->ctrl, GRCAN_CTRL_ENABLE))
if (unlikely(grcan_read_bits(®s->txctrl, GRCAN_TXCTRL_ENABLE))) {