include/rng.h

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (c) 2019, Linaro Limited
   4  */
   5
   6 #if !defined _RNG_H_
   7 #define _RNG_H_
   8
   9 struct udevice;
  10
  11 /**
  12  * dm_rng_read() - read a random number seed from the rng device
  13  * @buffer:     input buffer to put the read random seed into
  14  * @size:       number of bytes of random seed read
  15  *
  16  * Return: 0 if OK, -ve on error
  17  */
  18 int dm_rng_read(struct udevice *dev, void *buffer, size_t size);
  19
  20 /* struct dm_rng_ops - Operations for the hwrng uclass */
  21 struct dm_rng_ops {
  22         /**
  23          * @read() - read a random number seed
  24          *
  25          * @data:       input buffer to read the random seed
  26          * @max:        total number of bytes to read
  27          *
  28          * Return: 0 if OK, -ve on error
  29          */
  30         int (*read)(struct udevice *dev, void *data, size_t max);
  31 };
  32
  33 #endif /* _RNG_H_ */