ATMEL_PDC_RNPR
atmel_uart_writel(port, ATMEL_PDC_RNPR, pdc->dma_addr);
atmel_uart_writel(port, ATMEL_PDC_RNPR,
writel(runtime->dma_addr + block_size, chip->regs + ATMEL_PDC_RNPR);
writel(runtime->dma_addr + offset, chip->regs + ATMEL_PDC_RNPR);
.xnpr = ATMEL_PDC_RNPR,