DMA_CCTRL_CLASSH
class_high = FIELD_GET(DMA_CCTRL_CLASSH, reg);
val &= ~DMA_CCTRL_CLASSH;
val |= FIELD_PREP(DMA_CCTRL_CLASSH, class_high);
class_val |= FIELD_PREP(DMA_CCTRL_CLASSH, (val >> 3) & 0x3);
ldma_update_bits(d, DMA_CCTRL_CLASS | DMA_CCTRL_CLASSH, class_val,