[mirror_ubuntu-focal-kernel.git] / drivers / char / nwbutton.h

/* SPDX-License-Identifier: GPL-2.0 */
#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(struct timer_list *unused);
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 */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	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
24ed960a	28	static void button_sequence_finished(struct timer_list *unused);
7d12e780	29	static irqreturn_t button_handler (int irq, void *dev_id);
1da177e4 LT	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 */