/* * sercons.c *      choose the right serial device at boot time * * triemer 6-SEP-1998 *      sercons.c is designed to allow the three different kinds  *      of serial devices under the decstation world to co-exist *      in the same kernel.  The idea here is to abstract  *      the pieces of the drivers that are common to this file *      so that they do not clash at compile time and runtime. * * HK 16-SEP-1998 v0.002 *      removed the PROM console as this is not a real serial *      device. Added support for PROM console in drivers/char/tty_io.c *      instead. Although it may work to enable more than one  *      console device I strongly recommend to use only one. */ #include <linux/init.h>#include <asm/dec/machtype.h> #ifdef CONFIG_ZSextern int zs_init(void);#endif #ifdef CONFIG_SERIAL_CONSOLE #ifdef CONFIG_ZSextern void zs_serial_console_init(void);#endif #endif /* rs_init - starts up the serial interface -   handle normal case of starting up the serial interface */ #ifdef CONFIG_SERIAL int __init rs_init(void){#ifdef CONFIG_ZS    if (IOASIC)	return zs_init();#endif    return -ENXIO;} __initcall(rs_init); #endif #ifdef CONFIG_SERIAL_CONSOLE /* serial_console_init handles the special case of starting *   up the console on the serial port */static int __init decserial_console_init(void){#ifdef CONFIG_ZS    if (IOASIC)	zs_serial_console_init();#endif    return 0;}console_initcall(decserial_console_init); #endif