drivers/rng/tpm_rng.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2022, Linaro Limited
   4  */
   5
   6 #include <dm.h>
   7 #include <rng.h>
   8 #include <tpm_api.h>
   9
  10 static int rng_tpm_random_read(struct udevice *dev, void *data, size_t count)
  11 {
  12         return tpm_get_random(dev_get_parent(dev), data, count);
  13 }
  14
  15 static const struct dm_rng_ops tpm_rng_ops = {
  16         .read = rng_tpm_random_read,
  17 };
  18
  19 U_BOOT_DRIVER(tpm_rng) = {
  20         .name   = "tpm-rng",
  21         .id     = UCLASS_RNG,
  22         .ops    = &tpm_rng_ops,
  23 };