This patchset adds slave DMA support for Actions Semi S900 SoC of the Owl family. As a consumer, enable TX DMA support for UART peripheral in S900. The UART driver still supports interrupt mode if there is no DMA property specified in DT. The dts patch depends on the previous DMA patches which is not yet merged. Thanks, Mani Changes in v2: * Modified the comment for bus width as per Vinod's suggestion Manivannan Sadhasivam (3): arm64: dts: actions: s900: Enable Tx DMA for UART5 dmaengine: Add Slave and Cyclic mode support for Actions Semi Owl S900 SoC tty: serial: Add Tx DMA support for UART in Actions Semi Owl SoCs arch/arm64/boot/dts/actions/s900.dtsi | 2 + drivers/dma/owl-dma.c | 279 +++++++++++++++++++++++++- drivers/tty/serial/owl-uart.c | 172 +++++++++++++++- 3 files changed, 445 insertions(+), 8 deletions(-) -- 2.17.1