test/dm/rng.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2019, Linaro Limited
   4  */
   5
   6 #include <common.h>
   7 #include <dm.h>
   8 #include <log.h>
   9 #include <rng.h>
  10 #include <dm/test.h>
  11 #include <test/ut.h>
  12
  13 /* Basic test of the rng uclass */
  14 static int dm_test_rng_read(struct unit_test_state *uts)
  15 {
  16         unsigned long rand1 = 0, rand2 = 0;
  17         struct udevice *dev;
  18
  19         ut_assertok(uclass_get_device(UCLASS_RNG, 0, &dev));
  20         ut_assertnonnull(dev);
  21         ut_assertok(dm_rng_read(dev, &rand1, sizeof(rand1)));
  22         ut_assertok(dm_rng_read(dev, &rand2, sizeof(rand2)));
  23         ut_assert(rand1 != rand2);
  24
  25         return 0;
  26 }
  27 DM_TEST(dm_test_rng_read, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);