diff --git a/sound/aoa/aoa-gpio.h b/sound/aoa/aoa-gpio.h
new file mode 100644
index 0000000..3a61f31
--- /dev/null
+++ b/sound/aoa/aoa-gpio.h
@@ -0,0 +1,81 @@
+/*
+ * Apple Onboard Audio GPIO definitions
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPL v2, can be found in COPYING.
+ */
+
+#ifndef __AOA_GPIO_H
+#define __AOA_GPIO_H
+#include <linux/workqueue.h>
+#include <linux/mutex.h>
+#include <asm/prom.h>
+
+typedef void (*notify_func_t)(void *data);
+
+enum notify_type {
+	AOA_NOTIFY_HEADPHONE,
+	AOA_NOTIFY_LINE_IN,
+	AOA_NOTIFY_LINE_OUT,
+};
+
+struct gpio_runtime;
+struct gpio_methods {
+	/* for initialisation/de-initialisation of the GPIO layer */
+	void (*init)(struct gpio_runtime *rt);
+	void (*exit)(struct gpio_runtime *rt);
+
+	/* turn off headphone, speakers, lineout */
+	void (*all_amps_off)(struct gpio_runtime *rt);
+	/* turn headphone, speakers, lineout back to previous setting */
+	void (*all_amps_restore)(struct gpio_runtime *rt);
+
+	void (*set_headphone)(struct gpio_runtime *rt, int on);
+	void (*set_speakers)(struct gpio_runtime *rt, int on);
+	void (*set_lineout)(struct gpio_runtime *rt, int on);
+
+	int (*get_headphone)(struct gpio_runtime *rt);
+	int (*get_speakers)(struct gpio_runtime *rt);
+	int (*get_lineout)(struct gpio_runtime *rt);
+
+	void (*set_hw_reset)(struct gpio_runtime *rt, int on);
+
+	/* use this to be notified of any events. The notification
+	 * function is passed the data, and is called in process
+	 * context by the use of schedule_work.
+	 * The interface for it is that setting a function to NULL
+	 * removes it, and they return 0 if the operation succeeded,
+	 * and -EBUSY if the notification is already assigned by
+	 * someone else. */
+	int (*set_notify)(struct gpio_runtime *rt,
+			  enum notify_type type,
+			  notify_func_t notify,
+			  void *data);
+	/* returns 0 if not plugged in, 1 if plugged in
+	 * or a negative error code */
+	int (*get_detect)(struct gpio_runtime *rt,
+			  enum notify_type type);
+};
+
+struct gpio_notification {
+	notify_func_t notify;
+	void *data;
+	void *gpio_private;
+	struct work_struct work;
+	struct mutex mutex;
+};
+
+struct gpio_runtime {
+	/* to be assigned by fabric */
+	struct device_node *node;
+	/* since everyone needs this pointer anyway... */
+	struct gpio_methods *methods;
+	/* to be used by the gpio implementation */
+	int implementation_private;
+	struct gpio_notification headphone_notify;
+	struct gpio_notification line_in_notify;
+	struct gpio_notification line_out_notify;
+};
+
+#endif /* __AOA_GPIO_H */