drivers/staging/android/switch/switch.h

   1 /*
   2  *  Switch class driver
   3  *
   4  * Copyright (C) 2008 Google, Inc.
   5  * Author: Mike Lockwood <lockwood@android.com>
   6  *
   7  * This software is licensed under the terms of the GNU General Public
   8  * License version 2, as published by the Free Software Foundation, and
   9  * may be copied, distributed, and modified under those terms.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16 */
  17
  18 #ifndef __LINUX_SWITCH_H__
  19 #define __LINUX_SWITCH_H__
  20
  21 struct switch_dev {
  22         const char      *name;
  23         struct device   *dev;
  24         int             index;
  25         int             state;
  26
  27         ssize_t (*print_name)(struct switch_dev *sdev, char *buf);
  28         ssize_t (*print_state)(struct switch_dev *sdev, char *buf);
  29 };
  30
  31 struct gpio_switch_platform_data {
  32         const char *name;
  33         unsigned        gpio;
  34
  35         /* if NULL, switch_dev.name will be printed */
  36         const char *name_on;
  37         const char *name_off;
  38         /* if NULL, "0" or "1" will be printed */
  39         const char *state_on;
  40         const char *state_off;
  41 };
  42
  43 extern int switch_dev_register(struct switch_dev *sdev);
  44 extern void switch_dev_unregister(struct switch_dev *sdev);
  45
  46 static inline int switch_get_state(struct switch_dev *sdev)
  47 {
  48         return sdev->state;
  49 }
  50
  51 extern void switch_set_state(struct switch_dev *sdev, int state);
  52
  53 #endif /* __LINUX_SWITCH_H__ */