kconfig: re-sync with Linux 4.17-rc4

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

diff --git a/include/sound.h b/include/sound.h
index a06ab85..3269f23 100644 (file)
--- a/include/sound.h
+++ b/include/sound.h
@@ -1,8 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Copyright (C) 2012 Samsung Electronics
  * R. Chandrasekar < rcsekar@samsung.com>
- *
- * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #ifndef __SOUND_H__
@@ -30,6 +29,15 @@ struct sound_codec_info {
 };
 
 /*
+ * Generates square wave sound data for 1 second
+ *
+ * @param data          data buffer pointer
+ * @param size          size of the buffer
+ * @param freq          frequency of the wave
+ */
+void sound_create_square_wave(unsigned short *data, int size, uint32_t 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