--- zzzz-none-000/linux-3.10.107/include/linux/gpio_keys.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/include/linux/gpio_keys.h	2021-02-04 17:41:59.000000000 +0000
@@ -2,30 +2,57 @@
 #define _GPIO_KEYS_H
 
 struct device;
+struct gpio_desc;
 
+/**
+ * struct gpio_keys_button - configuration parameters
+ * @code:		input event code (KEY_*, SW_*)
+ * @gpio:		%-1 if this key does not support gpio
+ * @active_low:		%true indicates that button is considered
+ *			depressed when gpio is low
+ * @desc:		label that will be attached to button's gpio
+ * @type:		input event type (%EV_KEY, %EV_SW, %EV_ABS)
+ * @wakeup:		configure the button as a wake-up source
+ * @debounce_interval:	debounce ticks interval in msecs
+ * @can_disable:	%true indicates that userspace is allowed to
+ *			disable button via sysfs
+ * @value:		axis value for %EV_ABS
+ * @irq:		Irq number in case of interrupt keys
+ * @gpiod:		GPIO descriptor
+ */
 struct gpio_keys_button {
-	/* Configuration parameters */
-	unsigned int code;	/* input event code (KEY_*, SW_*) */
-	int gpio;		/* -1 if this key does not support gpio */
+	unsigned int code;
+	int gpio;
 	int active_low;
 	const char *desc;
-	unsigned int type;	/* input event type (EV_KEY, EV_SW, EV_ABS) */
-	int wakeup;		/* configure the button as a wake-up source */
-	int debounce_interval;	/* debounce ticks interval in msecs */
+	unsigned int type;
+	int wakeup;
+	int debounce_interval;
 	bool can_disable;
-	int value;		/* axis value for EV_ABS */
-	unsigned int irq;	/* Irq number in case of interrupt keys */
+	int value;
+	unsigned int irq;
+	struct gpio_desc *gpiod;
 };
 
+/**
+ * struct gpio_keys_platform_data - platform data for gpio_keys driver
+ * @buttons:		pointer to array of &gpio_keys_button structures
+ *			describing buttons attached to the device
+ * @nbuttons:		number of elements in @buttons array
+ * @poll_interval:	polling interval in msecs - for polling driver only
+ * @rep:		enable input subsystem auto repeat
+ * @enable:		platform hook for enabling the device
+ * @disable:		platform hook for disabling the device
+ * @name:		input device name
+ */
 struct gpio_keys_platform_data {
 	struct gpio_keys_button *buttons;
 	int nbuttons;
-	unsigned int poll_interval;	/* polling interval in msecs -
-					   for polling driver only */
-	unsigned int rep:1;		/* enable input subsystem auto repeat */
+	unsigned int poll_interval;
+	unsigned int rep:1;
 	int (*enable)(struct device *dev);
 	void (*disable)(struct device *dev);
-	const char *name;		/* input device name */
+	const char *name;
 };
 
 #endif