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| author | Huang Shijie <b32955@freescale.com> | 2013-11-29 17:29:24 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-08 17:09:07 -0800 |
| commit | 6b471a9840eefc96abb3fbd9eb71e1eb93399daa (patch) | |
| tree | 73c96875e1b3ec2c91e0383c226d0609c403216b /drivers/tty | |
| parent | 17438217a6f5e33d920ed3821a4b857311cc2872 (diff) | |
| download | linux-6b471a9840eefc96abb3fbd9eb71e1eb93399daa.tar.gz linux-6b471a9840eefc96abb3fbd9eb71e1eb93399daa.tar.bz2 linux-6b471a9840eefc96abb3fbd9eb71e1eb93399daa.zip | |
serial: imx: add support for loopback mode.
Add the loopback mode support for imx uart driver.
Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | 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 b2cfdb661947..d799140e53b6 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)); } /* |