>> IIUC, yes and no. It is the remapped address of the physical address you >> want to reach, not the physical address itself. The type is dma_addr_t >> and not phys_addr_t and you can get a dma address out of a physical >> address with a call to dma_map_resource(). The numerical value might be >> the same if there is no IO-MMU involved, but the good practice is to >> remap anyway. > > Got it. I will keep dma_map_resource() as it is, which is called in > ls1x_nand_probe(). > > + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "nand-dma"); > + host->dma_base = dma_map_resource(dev, res->start, resource_size(res), > + DMA_BIDIRECTIONAL, 0); > + if (dma_mapping_error(dev, host->dma_base)) > + return -ENXIO; Looks correct.
