diff options
| author | Heikki Krogerus | 2013-04-10 15:58:27 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2013-04-11 22:20:19 +0200 |
| commit | ab19479aa1b9708110bc90ba5b6c03b013feaa46 (patch) | |
| tree | 91fb1d87c3be7ddc89518336f137ba404afe87ea /drivers/tty | |
| parent | serial: 8250_dma: Use dmaengine helpers to get the slave channels (diff) | |
| download | kernel-qcow2-linux-ab19479aa1b9708110bc90ba5b6c03b013feaa46.tar.gz kernel-qcow2-linux-ab19479aa1b9708110bc90ba5b6c03b013feaa46.tar.xz kernel-qcow2-linux-ab19479aa1b9708110bc90ba5b6c03b013feaa46.zip | |
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>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250_dma.c | 10 |
1 files changed, 8 insertions, 2 deletions
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); |