diff options
| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2014-08-19 20:29:22 +0300 |
|---|---|---|
| committer | Vinod Koul <vinod.koul@intel.com> | 2014-09-11 11:48:36 +0530 |
| commit | 9a1870ce812e13091c21af36d4dc1cd29077966d (patch) | |
| tree | 45eb5fb233e7f6b6a1f683780ca6b8de03cd6a37 /drivers/tty/serial/8250/8250_dw.c | |
| parent | b279c4922e9242b4b1a04da7fa5622f2323c85de (diff) | |
serial: 8250: don't use slave_id of dma_slave_config
That field has been deprecated in favour of getting the necessary information
from ACPI or DT.
However, we still need to deal systems that are PCI only (no ACPI to back up)
like Intel Bay Trail. In order to support such systems, we explicitly bind
setup() to the appropriate DMA filter function and its corresponding parameter.
Then when serial8250_request_dma() doesn't find the channel via ACPI or DT, it
falls back to use the given filter function.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/tty/serial/8250/8250_dw.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_dw.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index 4db7987ec22..6664de2cdfd 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -216,10 +216,7 @@ out: static bool dw8250_dma_filter(struct dma_chan *chan, void *param) { - struct dw8250_data *data = param; - - return chan->chan_id == data->dma.tx_chan_id || - chan->chan_id == data->dma.rx_chan_id; + return false; } static void dw8250_setup_port(struct uart_8250_port *up) @@ -399,8 +396,6 @@ static int dw8250_probe(struct platform_device *pdev) if (!IS_ERR(data->rst)) reset_control_deassert(data->rst); - data->dma.rx_chan_id = -1; - data->dma.tx_chan_id = -1; data->dma.rx_param = data; data->dma.tx_param = data; data->dma.fn = dw8250_dma_filter; |