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Commit a3f0b77f authored by Maarten Brock's avatar Maarten Brock Committed by Greg Kroah-Hartman
Browse files

sc16is7xx: implemented get_mctrl 



Add support for manual getting the modem control lines.

Signed-off-by: default avatarMaarten Brock <m.brock@vanmierlo.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent b7dfdea8

drivers/tty/serial/sc16is7xx.c

+10 −4
Original line number Original line Diff line number Diff line
@@ -822,10 +822,16 @@ static unsigned int sc16is7xx_tx_empty(struct uart_port *port) 




static unsigned int sc16is7xx_get_mctrl(struct uart_port *port)

static unsigned int sc16is7xx_get_mctrl(struct uart_port *port)

{

{

	/* DCD and DSR are not wired and CTS/RTS is handled automatically

	unsigned int msr;

	 * so just indicate DSR and CAR asserted

	unsigned int ret = 0;

	 */



	return TIOCM_DSR | TIOCM_CAR;

	msr = sc16is7xx_port_read(port, SC16IS7XX_MSR_REG);



	ret |= (msr & SC16IS7XX_MSR_CTS_BIT) ? TIOCM_CTS : 0;

	ret |= (msr & SC16IS7XX_MSR_DSR_BIT) ? TIOCM_DSR : 0;

	ret |= (msr & SC16IS7XX_MSR_RI_BIT)  ? TIOCM_RNG : 0;

	ret |= (msr & SC16IS7XX_MSR_CD_BIT)  ? TIOCM_CAR : 0;

	return ret;

}

}





static void sc16is7xx_set_mctrl(struct uart_port *port, unsigned int mctrl)

static void sc16is7xx_set_mctrl(struct uart_port *port, unsigned int mctrl)