[PATCH 4/6] serial: samsung: add dma reqest/release functions

Add functions requesting and releasing RX and TX DMA channels. This function are called only when "dmas" property in serial device-tree node is defined. Based on previous work of Sylwester Nawrocki and Lukasz Czerwinski. Signed-off-by: Robert Baldyga --- drivers/tty/serial/samsung.c | 101

[PATCH 4/6] serial: samsung: add dma reqest/release functions

Add functions requesting and releasing RX and TX DMA channels. This function are called only when dmas property in serial device-tree node is defined. Based on previous work of Sylwester Nawrocki and Lukasz Czerwinski. Signed-off-by: Robert Baldyga r.bald...@samsung.com ---