1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _GPIO_KEYS_H
3 #define _GPIO_KEYS_H
4 
5 #include <linux/types.h>
6 
7 struct device;
8 
9 /**
10  * struct gpio_keys_button - configuration parameters
11  * @code:		input event code (KEY_*, SW_*)
12  * @gpio:		%-1 if this key does not support gpio
13  * @active_low:		%true indicates that button is considered
14  *			depressed when gpio is low
15  * @desc:		label that will be attached to button's gpio
16  * @type:		input event type (%EV_KEY, %EV_SW, %EV_ABS)
17  * @wakeup:		configure the button as a wake-up source
18  * @wakeup_event_action:	event action to trigger wakeup
19  * @debounce_interval:	debounce ticks interval in msecs
20  * @can_disable:	%true indicates that userspace is allowed to
21  *			disable button via sysfs
22  * @value:		axis value for %EV_ABS
23  * @irq:		Irq number in case of interrupt keys
24  */
25 struct gpio_keys_button {
26 	unsigned int code;
27 	int gpio;
28 	int active_low;
29 	const char *desc;
30 	unsigned int type;
31 	int wakeup;
32 	int wakeup_event_action;
33 	int debounce_interval;
34 	bool can_disable;
35 	int value;
36 	unsigned int irq;
37 };
38 
39 /**
40  * struct gpio_keys_platform_data - platform data for gpio_keys driver
41  * @buttons:		pointer to array of &gpio_keys_button structures
42  *			describing buttons attached to the device
43  * @nbuttons:		number of elements in @buttons array
44  * @poll_interval:	polling interval in msecs - for polling driver only
45  * @rep:		enable input subsystem auto repeat
46  * @enable:		platform hook for enabling the device
47  * @disable:		platform hook for disabling the device
48  * @name:		input device name
49  */
50 struct gpio_keys_platform_data {
51 	const struct gpio_keys_button *buttons;
52 	int nbuttons;
53 	unsigned int poll_interval;
54 	unsigned int rep:1;
55 	int (*enable)(struct device *dev);
56 	void (*disable)(struct device *dev);
57 	const char *name;
58 };
59 
60 #endif
61