serial 8250: enable PPS support
Automagically function serial8250_enable_ms() is called when PPS ldisc is selected. Signed-off-by: Rodolfo Giometti <giometti@linux.it> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Greg KH <greg@kroah.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Alexander Gordeev <lasaine@lvk.cs.msu.su> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -2407,6 +2407,21 @@ serial8250_set_termios(struct uart_port *port, struct ktermios *termios,
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tty_termios_encode_baud_rate(termios, baud, baud);
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}
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static void
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serial8250_set_ldisc(struct uart_port *port)
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{
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int line = port->line;
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if (line >= port->state->port.tty->driver->num)
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return;
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if (port->state->port.tty->ldisc->ops->num == N_PPS) {
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port->flags |= UPF_HARDPPS_CD;
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serial8250_enable_ms(port);
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} else
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port->flags &= ~UPF_HARDPPS_CD;
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}
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static void
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serial8250_pm(struct uart_port *port, unsigned int state,
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unsigned int oldstate)
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@ -2628,6 +2643,7 @@ static struct uart_ops serial8250_pops = {
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.startup = serial8250_startup,
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.shutdown = serial8250_shutdown,
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.set_termios = serial8250_set_termios,
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.set_ldisc = serial8250_set_ldisc,
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.pm = serial8250_pm,
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.type = serial8250_type,
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.release_port = serial8250_release_port,
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