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serial: sh-sci: Remove the platform data dma slave rx/tx channel IDs

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Only SH platforms still use platform data for the sh-sci, and none of
them declare DMA channels connected to the SCI. Remove the corresponding
platform data fields and simplify the driver accordingly.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Laurent Pinchart 2017-01-11 16:43:37 +02:00 committed by Greg Kroah-Hartman
parent b2f20ed9c4
commit 219fb0c143
2 changed files with 6 additions and 20 deletions
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23
drivers/tty/serial/sh-sci.c
View File

@ -1387,20 +1387,14 @@ static void rx_timer_fn(unsigned long arg)
}
static struct dma_chan *sci_request_dma_chan(struct uart_port *port,
enum dma_transfer_direction dir,
unsigned int id)
enum dma_transfer_direction dir)
{
dma_cap_mask_t mask;
struct dma_chan *chan;
struct dma_slave_config cfg;
int ret;
dma_cap_zero(mask);
dma_cap_set(DMA_SLAVE, mask);
chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
(void *)(unsigned long)id, port->dev,
dir == DMA_MEM_TO_DEV ? "tx" : "rx");
chan = dma_request_slave_channel(port->dev,
dir == DMA_MEM_TO_DEV ? "tx" : "rx");
if (!chan) {
dev_warn(port->dev,
"dma_request_slave_channel_compat failed\n");
@ -1436,12 +1430,11 @@ static void sci_request_dma(struct uart_port *port)
dev_dbg(port->dev, "%s: port %d\n", __func__, port->line);
if (!port->dev->of_node &&
(s->cfg->dma_slave_tx <= 0 || s->cfg->dma_slave_rx <= 0))
if (!port->dev->of_node)
return;
s->cookie_tx = -EINVAL;
chan = sci_request_dma_chan(port, DMA_MEM_TO_DEV, s->cfg->dma_slave_tx);
chan = sci_request_dma_chan(port, DMA_MEM_TO_DEV);
dev_dbg(port->dev, "%s: TX: got channel %p\n", __func__, chan);
if (chan) {
s->chan_tx = chan;
@ -1463,7 +1456,7 @@ static void sci_request_dma(struct uart_port *port)
INIT_WORK(&s->work_tx, work_fn_tx);
}
chan = sci_request_dma_chan(port, DMA_DEV_TO_MEM, s->cfg->dma_slave_rx);
chan = sci_request_dma_chan(port, DMA_DEV_TO_MEM);
dev_dbg(port->dev, "%s: RX: got channel %p\n", __func__, chan);
if (chan) {
unsigned int i;
@ -2706,10 +2699,6 @@ static int sci_init_single(struct platform_device *dev,
port->serial_in = sci_serial_in;
port->serial_out = sci_serial_out;
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;
}

3
include/linux/serial_sci.h
View File

@ -71,9 +71,6 @@ struct plat_sci_port {
unsigned char regtype;
struct plat_sci_port_ops *ops;
unsigned int dma_slave_tx;
unsigned int dma_slave_rx;
};
#endif /* __LINUX_SERIAL_SCI_H */