From: Heikki Krogerus Date: Wed, 10 Apr 2013 13:58:27 +0000 (+0300) Subject: serial: 8250_dma: Provide default slave configuration parameters X-Git-Tag: v3.10-rc1~191^2~21 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ab19479aa1b9708110bc90ba5b6c03b013feaa46;p=profile%2Fivi%2Fkernel-x86-ivi.git 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: Heikki Krogerus Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c index fdb6139e..7046769 100644 --- a/drivers/tty/serial/8250/8250_dma.c +++ b/drivers/tty/serial/8250/8250_dma.c @@ -149,8 +149,14 @@ int serial8250_request_dma(struct uart_8250_port *p) struct uart_8250_dma *dma = p->dma; dma_cap_mask_t mask; - dma->rxconf.src_addr = p->port.mapbase + UART_RX; - dma->txconf.dst_addr = p->port.mapbase + UART_TX; + /* 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); dma_cap_set(DMA_SLAVE, mask);