1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (c) 2019, Linaro Limited
12 /* Basic test of the rng uclass */
13 static int dm_test_rng_read(struct unit_test_state *uts)
15 unsigned long rand1 = 0, rand2 = 0;
18 ut_assertok(uclass_get_device(UCLASS_RNG, 0, &dev));
19 ut_assertnonnull(dev);
20 ut_assertok(dm_rng_read(dev, &rand1, sizeof(rand1)));
21 ut_assertok(dm_rng_read(dev, &rand2, sizeof(rand2)));
22 ut_assert(rand1 != rand2);
26 DM_TEST(dm_test_rng_read, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);