agp/hp: fail gracefully if we don't find an IOC
[pandora-kernel.git] / arch / arm / plat-omap / include / plat / gpio-switch.h
1 /*
2  * GPIO switch definitions
3  *
4  * Copyright (C) 2006 Nokia Corporation
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License version 2 as
8  * published by the Free Software Foundation.
9  */
10
11 #ifndef __ASM_ARCH_OMAP_GPIO_SWITCH_H
12 #define __ASM_ARCH_OMAP_GPIO_SWITCH_H
13
14 #include <linux/types.h>
15
16 /* Cover:
17  *      high -> closed
18  *      low  -> open
19  * Connection:
20  *      high -> connected
21  *      low  -> disconnected
22  * Activity:
23  *      high -> active
24  *      low  -> inactive
25  *
26  */
27 #define OMAP_GPIO_SWITCH_TYPE_COVER             0x0000
28 #define OMAP_GPIO_SWITCH_TYPE_CONNECTION        0x0001
29 #define OMAP_GPIO_SWITCH_TYPE_ACTIVITY          0x0002
30 #define OMAP_GPIO_SWITCH_FLAG_INVERTED          0x0001
31 #define OMAP_GPIO_SWITCH_FLAG_OUTPUT            0x0002
32
33 struct omap_gpio_switch {
34         const char *name;
35         s16 gpio;
36         unsigned flags:4;
37         unsigned type:4;
38
39         /* Time in ms to debounce when transitioning from
40          * inactive state to active state. */
41         u16 debounce_rising;
42         /* Same for transition from active to inactive state. */
43         u16 debounce_falling;
44
45         /* notify board-specific code about state changes */
46         void (* notify)(void *data, int state);
47         void *notify_data;
48 };
49
50 /* Call at init time only */
51 extern void omap_register_gpio_switches(const struct omap_gpio_switch *tbl,
52                                         int count);
53
54 #endif