From: Heikki Krogerus <heikki.krogerus@linux.intel.com>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org
Subject: [PATCH 4/9] serial: 8250_dma: Provide default slave configuration parameters
Date: Wed, 10 Apr 2013 16:58:27 +0300 [thread overview]
Message-ID: <1365602312-25436-5-git-send-email-heikki.krogerus@linux.intel.com> (raw)
In-Reply-To: <1365602312-25436-1-git-send-email-heikki.krogerus@linux.intel.com>
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>
---
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
next prev parent reply other threads:[~2013-04-10 13:58 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-10 13:58 [PATCH 0/9] serial: 8250_dma to use the new dmaengine helpers Heikki Krogerus
2013-04-10 13:58 ` [PATCH 1/9] serial: 8250_dma: TX cleanup Heikki Krogerus
2013-04-10 13:58 ` [PATCH 2/9] serial: 8250_dma: Fix RX handling Heikki Krogerus
2013-04-10 13:58 ` [PATCH 3/9] serial: 8250_dma: Use dmaengine helpers to get the slave channels Heikki Krogerus
2013-04-10 13:58 ` Heikki Krogerus [this message]
2013-04-10 13:58 ` [PATCH 5/9] serial: 8250_dw: Enable runtime PM Heikki Krogerus
2013-04-10 13:58 ` [PATCH 6/9] serial: 8250_dw: Support clk framework also with ACPI Heikki Krogerus
2013-04-10 13:58 ` [PATCH 7/9] serial: 8250_dw: Let ACPI code extract the DMA client info Heikki Krogerus
2013-04-10 13:58 ` [PATCH 8/9] serial: 8250_dw: Set port capabilities based on CPR register Heikki Krogerus
2013-04-10 13:58 ` [PATCH 9/9] serial: 8250_dw: Use devm_request_and_ioremap() Heikki Krogerus
2013-04-11 12:20 ` Heikki Krogerus
2013-04-11 12:43 ` [PATCH 9/9] serial: 8250_dw: Convert to devm_ioremap() Heikki Krogerus
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