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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2019, Linaro Limited
*/
#if !defined _RNG_H_
#define _RNG_H_
struct udevice;
/**
* dm_rng_read() - read a random number seed from the rng device
*
* The function blocks until the requested number of bytes is read.
*
* @dev: random number generator device
* @buffer: input buffer to put the read random seed into
* @size: number of random bytes to read
* Return: 0 if OK, -ve on error
*/
int dm_rng_read(struct udevice *dev, void *buffer, size_t size);
/**
* struct dm_rng_ops - operations for the hwrng uclass
*
* This structures contains the function implemented by a hardware random
* number generation device.
*/
struct dm_rng_ops {
/**
* @read: read a random bytes
*
* The function blocks until the requested number of bytes is read.
*
* @read.dev: random number generator device
* @read.data: input buffer to read the random seed into
* @read.max: number of random bytes to read
* @read.Return: 0 if OK, -ve on error
*/
int (*read)(struct udevice *dev, void *data, size_t max);
};
#endif /* _RNG_H_ */
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