Commit c161afe9 authored by Manuel Lauss's avatar Manuel Lauss Committed by Greg Kroah-Hartman
Browse files

8250: allow platforms to override PM hook. 



Add a hook for platforms to specify custom pm methods.

Signed-off-by: default avatarManuel Lauss <manuel.lauss@googlemail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 70eebd0b

drivers/serial/8250.c

+16 −11
Original line number Diff line number Diff line
@@ -154,12 +154,6 @@ struct uart_8250_port { 
	unsigned char		lsr_saved_flags;

#define MSR_SAVE_FLAGS UART_MSR_ANY_DELTA

	unsigned char		msr_saved_flags;



	/*

	 * We provide a per-port pm hook.

	 */

	void			(*pm)(struct uart_port *port,

				      unsigned int state, unsigned int old);

};



struct irq_info {
@@ -2436,16 +2430,24 @@ serial8250_set_ldisc(struct uart_port *port, int new) 
		port->flags &= ~UPF_HARDPPS_CD;

}



static void

serial8250_pm(struct uart_port *port, unsigned int state,



void serial8250_do_pm(struct uart_port *port, unsigned int state,

		      unsigned int oldstate)

{

	struct uart_8250_port *p = (struct uart_8250_port *)port;



	serial8250_set_sleep(p, state != 0);

}

EXPORT_SYMBOL(serial8250_do_pm);



	if (p->pm)

		p->pm(port, state, oldstate);

static void

serial8250_pm(struct uart_port *port, unsigned int state,

	      unsigned int oldstate)

{

	if (port->pm)

		port->pm(port, state, oldstate);

	else

		serial8250_do_pm(port, state, oldstate);

}



static unsigned int serial8250_port_size(struct uart_8250_port *pt)
@@ -3006,6 +3008,7 @@ static int __devinit serial8250_probe(struct platform_device *dev) 
		port.serial_in		= p->serial_in;

		port.serial_out		= p->serial_out;

		port.set_termios	= p->set_termios;

		port.pm			= p->pm;

		port.dev		= &dev->dev;

		port.irqflags		|= irqflag;

		ret = serial8250_register_port(&port);
@@ -3172,6 +3175,8 @@ int serial8250_register_port(struct uart_port *port) 
		/*  Possibly override set_termios call */

		if (port->set_termios)

			uart->port.set_termios = port->set_termios;

		if (port->pm)

			uart->port.pm = port->pm;



		ret = uart_add_one_port(&serial8250_reg, &uart->port);

		if (ret == 0)

include/linux/serial_8250.h

+4 −0
Original line number Diff line number Diff line
@@ -35,6 +35,8 @@ struct plat_serial8250_port { 
	void		(*set_termios)(struct uart_port *,

			               struct ktermios *new,

			               struct ktermios *old);

	void		(*pm)(struct uart_port *, unsigned int state,

			      unsigned old);

};



/*
@@ -76,5 +78,7 @@ extern int serial8250_find_port_for_earlycon(void); 
extern int setup_early_serial8250_console(char *cmdline);

extern void serial8250_do_set_termios(struct uart_port *port,

		struct ktermios *termios, struct ktermios *old);

extern void serial8250_do_pm(struct uart_port *port, unsigned int state,

			     unsigned int oldstate);



#endif

include/linux/serial_core.h

+2 −0
Original line number Diff line number Diff line
@@ -289,6 +289,8 @@ struct uart_port { 
	void			(*set_termios)(struct uart_port *,

				               struct ktermios *new,

				               struct ktermios *old);

	void			(*pm)(struct uart_port *, unsigned int state,

				      unsigned int old);

	unsigned int		irq;			/* irq number */

	unsigned long		irqflags;		/* irq flags  */

	unsigned int		uartclk;		/* base uart clock */