From ab19479aa1b9708110bc90ba5b6c03b013feaa46 Mon Sep 17 00:00:00 2001 From: Heikki Krogerus <heikki.krogerus@linux.intel.com> Date: Wed, 10 Apr 2013 16:58:27 +0300 Subject: 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 <heikki.krogerus@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/tty/serial/8250/8250_dma.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'drivers/tty/serial/8250/8250_dma.c') diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c index fdb6139e8c17..7046769608d4 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); -- cgit v1.2.3