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serial: 8250: export get_mctrl function

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Exposes get_mctrl() function so that it can be overriden with platform
specific implementation.

Signed-off-by: Wan Ahmad Zainie <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Reviewed-by: Heikki Krogerus <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Wan Ahmad Zainie 2016-04-06 12:06:51 +08:00 • committed by Greg Kroah-Hartman
commit 144ef5c2df
4 changed files with 15 additions and 1 deletions
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3
drivers/tty/serial/8250/8250_core.c
View file

@ -830,6 +830,7 @@ static int serial8250_probe(struct platform_device *dev)
uart.port.handle_irq = p->handle_irq;
uart.port.handle_break = p->handle_break;
uart.port.set_termios = p->set_termios;
uart.port.get_mctrl = p->get_mctrl;
uart.port.pm = p->pm;
uart.port.dev = &dev->dev;
uart.port.irqflags |= irqflag;
@ -1022,6 +1023,8 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
/* Possibly override set_termios call */
if (up->port.set_termios)
uart->port.set_termios = up->port.set_termios;
if (up->port.get_mctrl)
uart->port.get_mctrl = up->port.get_mctrl;
if (up->port.set_mctrl)
uart->port.set_mctrl = up->port.set_mctrl;
if (up->port.startup)

10
drivers/tty/serial/8250/8250_port.c
View file

@ -1882,7 +1882,7 @@ static unsigned int serial8250_tx_empty(struct uart_port *port)
return (lsr & BOTH_EMPTY) == BOTH_EMPTY ? TIOCSER_TEMT : 0;
}
static unsigned int serial8250_get_mctrl(struct uart_port *port)
unsigned int serial8250_do_get_mctrl(struct uart_port *port)
{
struct uart_8250_port *up = up_to_u8250p(port);
unsigned int status;
@ -1903,6 +1903,14 @@ static unsigned int serial8250_get_mctrl(struct uart_port *port)
ret |= TIOCM_CTS;
return ret;
}
EXPORT_SYMBOL_GPL(serial8250_do_get_mctrl);
static unsigned int serial8250_get_mctrl(struct uart_port *port)
{
if (port->get_mctrl)
return port->get_mctrl(port);
return serial8250_do_get_mctrl(port);
}
void serial8250_do_set_mctrl(struct uart_port *port, unsigned int mctrl)
{