#ifndef __NWBUTTON_H#define __NWBUTTON_H /* * 	NetWinder Button Driver- *	Copyright (C) Alex Holden <alex@linuxhacker.org> 1998, 1999. */ #ifdef __NWBUTTON_C	/* Actually compiling the driver itself */ /* Various defines: */ #define NUM_PRESSES_REBOOT 2	/* How many presses to activate shutdown */#define BUTTON_DELAY 30 	/* How many jiffies for sequence to end */#define VERSION "0.3"		/* Driver version number */#define BUTTON_MINOR 158	/* Major 10, Minor 158, /dev/nwbutton */ /* Structure definitions: */ struct button_callback {	void (*callback) (void);	int count;}; /* Function prototypes: */ static void button_sequence_finished (unsigned long parameters);static irqreturn_t button_handler (int irq, void *dev_id);int button_init (void);int button_add_callback (void (*callback) (void), int count);int button_del_callback (void (*callback) (void));static void button_consume_callbacks (int bpcount); #else /* Not compiling the driver itself */ extern int button_add_callback (void (*callback) (void), int count);extern int button_del_callback (void (*callback) (void)); #endif /* __NWBUTTON_C */#endif /* __NWBUTTON_H */