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Commit 6b471a98 authored by Huang Shijie's avatar Huang Shijie Committed by Greg Kroah-Hartman
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serial: imx: add support for loopback mode. 



Add the loopback mode support for imx uart driver.

Signed-off-by: default avatarHuang Shijie <b32955@freescale.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 17438217

drivers/tty/serial/imx.c

+8 −0
Original line number Diff line number Diff line
@@ -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));

}



/*