include/linux/extcon/extcon-gpio.h

   1 /*
   2  *  External connector (extcon) class generic GPIO driver
   3  *
   4  * Copyright (C) 2012 Samsung Electronics
   5  * Author: MyungJoo Ham <myungjoo.ham@samsung.com>
   6  *
   7  * based on switch class driver
   8  * Copyright (C) 2008 Google, Inc.
   9  * Author: Mike Lockwood <lockwood@android.com>
  10  *
  11  * This software is licensed under the terms of the GNU General Public
  12  * License version 2, as published by the Free Software Foundation, and
  13  * may be copied, distributed, and modified under those terms.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20 */
  21 #ifndef __EXTCON_GPIO_H__
  22 #define __EXTCON_GPIO_H__ __FILE__
  23
  24 #include <linux/extcon.h>
  25
  26 /**
  27  * struct gpio_extcon_platform_data - A simple GPIO-controlled extcon device.
  28  * @name:               The name of this GPIO extcon device.
  29  * @gpio:               Corresponding GPIO.
  30  * @gpio_active_low:    Boolean describing whether gpio active state is 1 or 0
  31  *                      If true, low state of gpio means active.
  32  *                      If false, high state of gpio means active.
  33  * @debounce:           Debounce time for GPIO IRQ in ms.
  34  * @irq_flags:          IRQ Flags (e.g., IRQF_TRIGGER_LOW).
  35  * @state_on:           print_state is overriden with state_on if attached.
  36  *                      If NULL, default method of extcon class is used.
  37  * @state_off:          print_state is overriden with state_on if detached.
  38  *                      If NUll, default method of extcon class is used.
  39  *
  40  * Note that in order for state_on or state_off to be valid, both state_on
  41  * and state_off should be not NULL. If at least one of them is NULL,
  42  * the print_state is not overriden.
  43  */
  44 struct gpio_extcon_platform_data {
  45         const char *name;
  46         unsigned gpio;
  47         bool gpio_active_low;
  48         unsigned long debounce;
  49         unsigned long irq_flags;
  50
  51         /* if NULL, "0" or "1" will be printed */
  52         const char *state_on;
  53         const char *state_off;
  54 };
  55
  56 #endif /* __EXTCON_GPIO_H__ */