TRANSFER_SIZE
unsigned int ctrl = TRANSFER_SIZE | DMA_CR_E;
if (offset + TRANSFER_SIZE >= end)
idma->cur_len = end - TRANSFER_SIZE;
.data_size = TRANSFER_SIZE(4),
seq->data_size = TRANSFER_SIZE(size_ub);
seq->data_size = TRANSFER_SIZE(size_ub);
.data_size = TRANSFER_SIZE(8),
.data_size = TRANSFER_SIZE(4),
.data_size = TRANSFER_SIZE(1),