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