serial: imx: add support for DTE mode
The uart works in the DCE mode by default, but sometime we need it
works at the DTE mode.
This patch adds the support for the DTE mode.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 72bc1db..381a2d7 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -201,6 +201,7 @@
unsigned int old_status;
int txirq, rxirq, rtsirq;
unsigned int have_rtscts:1;
+ unsigned int dte_mode:1;
unsigned int use_irda:1;
unsigned int irda_inv_rx:1;
unsigned int irda_inv_tx:1;
@@ -1020,6 +1021,8 @@
ufcr = readl(sport->port.membase + UFCR);
ufcr = (ufcr & (~UFCR_RFDIV)) | UFCR_RFDIV_REG(div);
+ if (sport->dte_mode)
+ ufcr |= UFCR_DCEDTE;
writel(ufcr, sport->port.membase + UFCR);
writel(num, sport->port.membase + UBIR);
@@ -1444,6 +1447,9 @@
if (of_get_property(np, "fsl,irda-mode", NULL))
sport->use_irda = 1;
+ if (of_get_property(np, "fsl,dte-mode", NULL))
+ sport->dte_mode = 1;
+
sport->devdata = of_id->data;
return 0;