--- /dev/null
+/*
+ * Copyright © 2016 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _AO_POWER_H_
+#define _AO_POWER_H_
+
+#if AO_POWER_MANAGEMENT
+
+struct ao_power {
+ struct ao_power *prev, *next;
+
+ void (*suspend)(void *arg);
+ void (*resume)(void *arg);
+ void *arg;
+ uint8_t registered;
+};
+
+void
+ao_power_register(struct ao_power *power);
+
+void
+ao_power_unregister(struct ao_power *power);
+
+void
+ao_power_suspend(void);
+
+void
+ao_power_resume(void);
+
+#else /* AO_POWER_MANAGEMENT */
+
+#define ao_power_register(power)
+#define ao_power_unregister(power)
+#define ao_power_suspend()
+#define ao_power_resume()
+
+#endif /* else AO_POWER_MANAGEMENT */
+
+#endif /* _AO_POWER_H_ */