[PATCH] serial: imx: add support for loopback mode.
From: Huang Shijie <hidden>
Date: 2013-11-29 09:29:24
Also in:
linux-arm-kernel
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
Add the loopback mode support for imx uart driver. Signed-off-by: Huang Shijie <redacted> --- 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