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Date: Wed, 10 Apr 2013 16:58:27 +0300 From: Heikki Krogerus <heikki.krogerus@...ux.intel.com> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Cc: linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org Subject: [PATCH 4/9] 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@...ux.intel.com> --- drivers/tty/serial/8250/8250_dma.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) 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); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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