From: Huang Shijie Date: Fri, 29 Nov 2013 09:29:24 +0000 (+0800) Subject: serial: imx: add support for loopback mode. X-Git-Tag: next-20131210~17^2~5 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6b471a9840eefc96abb3fbd9eb71e1eb93399daa;p=karo-tx-linux.git serial: imx: add support for loopback mode. Add the loopback mode support for imx uart driver. Signed-off-by: Huang Shijie Signed-off-by: Greg Kroah-Hartman --- 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)); } /*