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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 <[email protected]> 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
18/* Structure definitions: */
19
20struct button_callback {
21 void (*callback) (void);
22 int count;
23};
24
25/* Function prototypes: */
26
27static void button_sequence_finished(struct timer_list *unused);
28static irqreturn_t button_handler (int irq, void *dev_id);
29int button_init (void);
30int button_add_callback (void (*callback) (void), int count);
31int button_del_callback (void (*callback) (void));
32static void button_consume_callbacks (int bpcount);
33
34#else /* Not compiling the driver itself */
35
36extern int button_add_callback (void (*callback) (void), int count);
37extern int button_del_callback (void (*callback) (void));
38
39#endif /* __NWBUTTON_C */
40#endif /* __NWBUTTON_H */