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