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Commit ab19479a authored by Heikki Krogerus's avatar Heikki Krogerus Committed by Greg Kroah-Hartman
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serial: 8250_dma: Provide default slave configuration parameters 



Some slave channel parameters will be always the same. For
example, direction for the Rx channel will always be
DMA_DEV_TO_MEM and DMA_MEM_TO_DEV for Tx channel.

Signed-off-by: default avatarHeikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent e4fb3b88

drivers/tty/serial/8250/8250_dma.c

+8 −2
Original line number Diff line number Diff line
@@ -149,7 +149,13 @@ int serial8250_request_dma(struct uart_8250_port *p) 
	struct uart_8250_dma	*dma = p->dma;

	dma_cap_mask_t		mask;



	/* Default slave configuration parameters */

	dma->rxconf.direction		= DMA_DEV_TO_MEM;

	dma->rxconf.src_addr_width	= DMA_SLAVE_BUSWIDTH_1_BYTE;

	dma->rxconf.src_addr		= p->port.mapbase + UART_RX;



	dma->txconf.direction		= DMA_MEM_TO_DEV;

	dma->txconf.dst_addr_width	= DMA_SLAVE_BUSWIDTH_1_BYTE;

	dma->txconf.dst_addr		= p->port.mapbase + UART_TX;



	dma_cap_zero(mask);