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