1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __NWBUTTON_H
3 #define __NWBUTTON_H
4 
5 /*
6  * 	NetWinder Button Driver-
7  *	Copyright (C) Alex Holden <alex@linuxhacker.org> 1998, 1999.
8  */
9 
10 #ifdef __NWBUTTON_C	/* Actually compiling the driver itself */
11 
12 /* Various defines: */
13 
14 #define NUM_PRESSES_REBOOT 2	/* How many presses to activate shutdown */
15 #define BUTTON_DELAY 30 	/* How many jiffies for sequence to end */
16 #define VERSION "0.3"		/* Driver version number */
17 #define BUTTON_MINOR 158	/* Major 10, Minor 158, /dev/nwbutton */
18 
19 /* Structure definitions: */
20 
21 struct button_callback {
22 	void (*callback) (void);
23 	int count;
24 };
25 
26 /* Function prototypes: */
27 
28 static void button_sequence_finished(struct timer_list *unused);
29 static irqreturn_t button_handler (int irq, void *dev_id);
30 int button_init (void);
31 int button_add_callback (void (*callback) (void), int count);
32 int button_del_callback (void (*callback) (void));
33 static void button_consume_callbacks (int bpcount);
34 
35 #else /* Not compiling the driver itself */
36 
37 extern int button_add_callback (void (*callback) (void), int count);
38 extern int button_del_callback (void (*callback) (void));
39 
40 #endif /* __NWBUTTON_C */
41 #endif /* __NWBUTTON_H */
42