Add the loopback mode support for imx uart driver. Signed-off-by: Huang Shijie <b32955@xxxxxxxxxxxxx> --- drivers/tty/serial/imx.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index b2cfdb6..d799140 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -806,6 +806,9 @@ static unsigned int imx_get_mctrl(struct uart_port *port) if (readl(sport->port.membase + UCR2) & UCR2_CTS) tmp |= TIOCM_RTS; + if (readl(sport->port.membase + uts_reg(sport)) & UTS_LOOP) + tmp |= TIOCM_LOOP; + return tmp; } @@ -821,6 +824,11 @@ static void imx_set_mctrl(struct uart_port *port, unsigned int mctrl) temp |= UCR2_CTS; writel(temp, sport->port.membase + UCR2); + + temp = readl(sport->port.membase + uts_reg(sport)) & ~UTS_LOOP; + if (mctrl & TIOCM_LOOP) + temp |= UTS_LOOP; + writel(temp, sport->port.membase + uts_reg(sport)); } /* -- 1.7.2.rc3 -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
