Messages in this thread Patch in this message | | | Date | Fri, 24 Jun 2011 13:56:15 +0200 (CEST) | From | Guennadi Liakhovetski <> | Subject | [PATCH] serial: sh-sci: don't filter on DMA device, use only channel ID |
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On some sh-mobile systems there are more than one DMA controllers, that can be used for serial ports. Specifying a DMA device in sh-sci platform data unnecessarily restricts the driver to only use one DMA controller.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> --- drivers/tty/serial/sh-sci.c | 25 ++++++++----------------- include/linux/serial_sci.h | 2 -- 2 files changed, 8 insertions(+), 19 deletions(-)
diff --git a/drivers/tty/serial/sh-sci.c b/drivers/tty/serial/sh-sci.c index ebd8629..8711f4e 100644 --- a/drivers/tty/serial/sh-sci.c +++ b/drivers/tty/serial/sh-sci.c @@ -1295,12 +1295,8 @@ static bool filter(struct dma_chan *chan, void *slave) dev_dbg(chan->device->dev, "%s: slave ID %d\n", __func__, param->slave_id); - if (param->dma_dev == chan->device->dev) { - chan->private = param; - return true; - } else { - return false; - } + chan->private = param; + return true; } static void rx_timer_fn(unsigned long arg) @@ -1326,10 +1322,10 @@ static void sci_request_dma(struct uart_port *port) dma_cap_mask_t mask; int nent; - dev_dbg(port->dev, "%s: port %d DMA %p\n", __func__, - port->line, s->cfg->dma_dev); + dev_dbg(port->dev, "%s: port %d\n", __func__, + port->line); - if (!s->cfg->dma_dev) + if (s->cfg->dma_slave_tx <= 0 || s->cfg->dma_slave_rx <= 0) return; dma_cap_zero(mask); @@ -1339,7 +1335,6 @@ static void sci_request_dma(struct uart_port *port) /* Slave ID, e.g., SHDMA_SLAVE_SCIF0_TX */ param->slave_id = s->cfg->dma_slave_tx; - param->dma_dev = s->cfg->dma_dev; s->cookie_tx = -EINVAL; chan = dma_request_channel(mask, filter, param); @@ -1368,7 +1363,6 @@ static void sci_request_dma(struct uart_port *port) /* Slave ID, e.g., SHDMA_SLAVE_SCIF0_RX */ param->slave_id = s->cfg->dma_slave_rx; - param->dma_dev = s->cfg->dma_dev; chan = dma_request_channel(mask, filter, param); dev_dbg(port->dev, "%s: RX: got channel %p\n", __func__, chan); @@ -1413,9 +1407,6 @@ static void sci_free_dma(struct uart_port *port) { struct sci_port *s = to_sci_port(port); - if (!s->cfg->dma_dev) - return; - if (s->chan_tx) sci_tx_dma_release(s, false); if (s->chan_rx) @@ -1790,9 +1781,9 @@ static int __devinit sci_init_single(struct platform_device *dev, */ port->irq = p->irqs[SCIx_RXI_IRQ]; - if (p->dma_dev) - dev_dbg(port->dev, "DMA device %p, tx %d, rx %d\n", - p->dma_dev, p->dma_slave_tx, p->dma_slave_rx); + if (p->dma_slave_tx > 0 && p->dma_slave_rx > 0) + dev_dbg(port->dev, "DMA tx %d, rx %d\n", + p->dma_slave_tx, p->dma_slave_rx); return 0; } diff --git a/include/linux/serial_sci.h b/include/linux/serial_sci.h index a2afc9f..9d01ffa 100644 --- a/include/linux/serial_sci.h +++ b/include/linux/serial_sci.h @@ -56,8 +56,6 @@ struct plat_sci_port { unsigned int scbrr_algo_id; /* SCBRR calculation algo */ unsigned int scscr; /* SCSCR initialization */ - struct device *dma_dev; - unsigned int dma_slave_tx; unsigned int dma_slave_rx; }; -- 1.7.2.5
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