From mboxrd@z Thu Jan 1 00:00:00 1970 From: Heikki Krogerus Subject: [PATCH 3/9] serial: 8250_dma: Use dmaengine helpers to get the slave channels Date: Wed, 10 Apr 2013 16:58:26 +0300 Message-ID: <1365602312-25436-4-git-send-email-heikki.krogerus@linux.intel.com> References: <1365602312-25436-1-git-send-email-heikki.krogerus@linux.intel.com> Return-path: In-Reply-To: <1365602312-25436-1-git-send-email-heikki.krogerus@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org To: Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org List-Id: linux-serial@vger.kernel.org The helper functions in dmaengine API allow the drivers to request slave channels without the filter parameters. They will attempt to extract the needed DMA client information from DT or ACPI, but if such information is not available the filter parameters can still be used. Signed-off-by: Heikki Krogerus --- drivers/tty/serial/8250/8250_dma.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/8250/8250_dma.c b/drivers/tty/serial/8250/8250_dma.c index 6643061..fdb6139e 100644 --- a/drivers/tty/serial/8250/8250_dma.c +++ b/drivers/tty/serial/8250/8250_dma.c @@ -156,14 +156,18 @@ int serial8250_request_dma(struct uart_8250_port *p) dma_cap_set(DMA_SLAVE, mask); /* Get a channel for RX */ - dma->rxchan = dma_request_channel(mask, dma->fn, dma->rx_param); + dma->rxchan = dma_request_slave_channel_compat(mask, + dma->fn, dma->rx_param, + p->port.dev, "rx"); if (!dma->rxchan) return -ENODEV; dmaengine_slave_config(dma->rxchan, &dma->rxconf); /* Get a channel for TX */ - dma->txchan = dma_request_channel(mask, dma->fn, dma->tx_param); + dma->txchan = dma_request_slave_channel_compat(mask, + dma->fn, dma->tx_param, + p->port.dev, "tx"); if (!dma->txchan) { dma_release_channel(dma->rxchan); return -ENODEV; -- 1.7.10.4