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+/***************************************************************************//**
+ *   @file   trng.h
+ *   @brief  Header file of true random number generator
+ *   @author Mihail Chindris ([email protected])
+********************************************************************************
+ *   @copyright
+ * Copyright 2020(c) Analog Devices, Inc.
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *  - Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *  - Neither the name of Analog Devices, Inc. nor the names of its
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *  - The use of this software may or may not infringe the patent rights
+ *    of one or more patent holders.  This license does not release you
+ *    from the requirement that you obtain separate licenses from these
+ *    patent holders to use this software.
+ *  - Use of the software either in source or binary form, must be run
+ *    on or directly connected to an Analog Devices Inc. component.
+ *
+ * THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*******************************************************************************/
+
+#ifndef _TRNG_H_
+#define _TRNG_H_
+
+/******************************************************************************/
+/***************************** Include Files **********************************/
+/******************************************************************************/
+
+#include <stdint.h>
+
+/******************************************************************************/
+/*************************** Types Declarations *******************************/
+/******************************************************************************/
+
+/**
+ * @struct trng_platform_ops
+ * @brief Structure holding TRNG function pointers that point to the platform
+ * specific function
+ */
+struct trng_platform_ops;
+
+/**
+ * @struct trng_desc
+ * @brief TRNG Descriptor
+ */
+struct trng_desc {
+	/** Platform ops */
+	const struct trng_platform_ops *platform_ops;
+	/** Platform specific parameters */
+	void *extra;
+};
+
+/**
+ * @struct trng_init_param
+ * @brief Init parameter for TRNG
+ */
+struct trng_init_param {
+	/** Device id */
+	uint32_t	dev_id;
+	/** Platform specific parameter */
+	void		*extra;
+	/** Platform ops */
+	const struct trng_platform_ops *platform_ops;
+};
+
+/**
+ * @struct trng_platform_ops
+ * @brief Structure holding TRNG function pointers that point to the platform
+ * specific function
+ */
+struct trng_platform_ops {
+	/** TRNG initialization function pointer */
+	int (*init)(struct trng_desc **,
+		    const struct trng_init_param *);
+	/** Fill buffer with random numbers */
+	int (*fill_buffer)(struct trng_desc *, uint8_t *, uint32_t);
+	/** TRNG remove function pointer */
+	int (*remove)(struct trng_desc *);
+};
+
+/******************************************************************************/
+/************************ Functions Declarations ******************************/
+/******************************************************************************/
+
+/* Initialize descriptor */
+int trng_init(struct trng_desc **desc,
+		    const struct trng_init_param *param);
+
+/* Free resources allocated in descriptor */
+int trng_remove(struct trng_desc *desc);
+
+/* Fill buffer with random numbers */
+int trng_fill_buffer(struct trng_desc *desc, uint8_t *buff,
+			   uint32_t len);
+
+#endif // _TRNG_H_