diff options
Diffstat (limited to 'drivers/tty/serial/8250')
| -rw-r--r-- | drivers/tty/serial/8250/8250_lpss.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_lpss.c b/drivers/tty/serial/8250/8250_lpss.c index 4dee8a9e0c95..848d81e3838c 100644 --- a/drivers/tty/serial/8250/8250_lpss.c +++ b/drivers/tty/serial/8250/8250_lpss.c @@ -158,6 +158,16 @@ static int byt_serial_setup(struct lpss8250 *lpss, struct uart_port *port) static int ehl_serial_setup(struct lpss8250 *lpss, struct uart_port *port) { + struct uart_8250_dma *dma = &lpss->data.dma; + struct uart_8250_port *up = up_to_u8250p(port); + + /* + * This simply makes the checks in the 8250_port to try the DMA + * channel request which in turn uses the magic of ACPI tables + * parsing (see drivers/dma/acpi-dma.c for the details) and + * matching with the registered General Purpose DMA controllers. + */ + up->dma = dma; return 0; } |