Merge branch 'master' of git://git.denx.de/u-boot-spi

[platform/kernel/u-boot.git] / include / sound.h

diff --git a/include/sound.h b/include/sound.h
index 94922f6..77bfe6a 100644 (file)
--- a/include/sound.h
+++ b/include/sound.h
@@ -1,24 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2012 Samsung Electronics
  * R. Chandrasekar < rcsekar@samsung.com>
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * 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; either version 2 of
- * the License, or (at your option) any later version.
- *
- * 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 __SOUND_H__
@@ -46,6 +29,17 @@ struct sound_codec_info {
 };
 
 /*
+ * Generates square wave sound data for 1 second
+ *
+ * @param sample_rate   Sample rate in Hz
+ * @param data          data buffer pointer
+ * @param size          size of the buffer
+ * @param freq          frequency of the wave
+ */
+void sound_create_square_wave(uint sample_rate, unsigned short *data, int size,
+                             uint freq);
+
+/*
  * Initialises audio sub system
  * @param blob Pointer of device tree node or NULL if none.
  * @return     int value 0 for success, -1 for error