sc16is7xx: implemented get_mctrl
Add support for manual getting the modem control lines. Signed-off-by: Maarten Brock <m.brock@vanmierlo.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
b7dfdea859
commit
a3f0b77f36
1 changed files with 10 additions and 4 deletions
|
@ -822,10 +822,16 @@ static unsigned int sc16is7xx_tx_empty(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
|
||||
* so just indicate DSR and CAR asserted
|
||||
*/
|
||||
return TIOCM_DSR | TIOCM_CAR;
|
||||
unsigned int msr;
|
||||
unsigned int ret = 0;
|
||||
|
||||
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)
|
||||
|
|
Loading…
Reference in a new issue