diff options
| author | Fugang Duan <b38611@freescale.com> | 2014-07-11 10:34:27 +0800 |
|---|---|---|
| committer | Fugang Duan <b38611@freescale.com> | 2014-07-11 12:12:06 +0800 |
| commit | dc49a7739f46c92cc52e43e538d98f45e8cd5920 (patch) | |
| tree | 887c14131e6933068b13f943a17f289a9d126137 /drivers | |
| parent | bc123587aab31201fee090653b9e30237f62a86f (diff) | |
ENGR00322379 tty: serial: imx: set uart to cpu mode by default
Now uart cannot work well with CSR/Atheros BT module with SDMA
mode. Set it to cpu mode before SDMA mode work.
To enable dma mode, just add "fsl,dma-mode" in the device tree for
the node.
Signed-off-by: Fugang Duan <B38611@freescale.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/tty/serial/imx.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index a8f2215dffbc..5ecaee07cbac 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -208,6 +208,7 @@ struct imx_port { unsigned int have_rtscts:1; unsigned int dte_mode:1; unsigned int use_irda:1; + unsigned int dma_mode:1; unsigned int irda_inv_rx:1; unsigned int irda_inv_tx:1; unsigned short trcv_delay; /* transceiver delay */ @@ -1357,7 +1358,7 @@ imx_set_termios(struct uart_port *port, struct ktermios *termios, /* Can we enable the DMA support? */ if (is_imx6q_uart(sport) && !uart_console(port) - && !sport->dma_is_inited) + && !sport->dma_is_inited && sport->dma_mode) imx_uart_dma_init(sport); } else { termios->c_cflag &= ~CRTSCTS; @@ -1920,6 +1921,9 @@ static int serial_imx_probe_dt(struct imx_port *sport, if (of_get_property(np, "fsl,dte-mode", NULL)) sport->dte_mode = 1; + if (of_get_property(np, "fsl,dma-mode", NULL)) + sport->dma_mode = 1; + sport->devdata = of_id->data; return 0; |