Hi all, according to BCM2835 ARM Peripherals spec DMA is optional functionality for ARM PL011 UART and it is not supported on this SoC. It looks like amba-pl011 search for device tree property (dma-names) unconditionally, what leads to error message: of_dma_request_slave_channel: dma-names property of node '/soc/uart@7e201000' missing or empty uart-pl011 20201000.uart: no DMA platform data I assume that if it is possible that amba-pl011 can be without DMA we should check if DMA is supported and then try to read properties. Is there any known method for checking dma support ? If yes that I would be glad for any pointers. Let me know if I should ignore/accept this error message or there is some code fix needed. Thanks, Piotr Król ~ -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
