test: rng: Add basic test for random number generator(rng) uclass

Add a unit test for testing the rng uclass functionality using the
sandbox rng driver.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/test/dm/Makefile b/test/dm/Makefile
index a2687831696e2e0370a51e18a10fe3d988abb839..201e2b093c16fa2094571efcffa6993ad7389932 100644 (file)
--- a/test/dm/Makefile
+++ b/test/dm/Makefile
@@ -68,4 +68,5 @@ obj-$(CONFIG_VIRTIO_SANDBOX) += virtio.o
 obj-$(CONFIG_DMA) += dma.o
 obj-$(CONFIG_DM_MDIO) += mdio.o
 obj-$(CONFIG_DM_MDIO_MUX) += mdio_mux.o
+obj-$(CONFIG_DM_RNG) += rng.o
 endif

diff --git a/test/dm/rng.c b/test/dm/rng.c
new file mode 100644 (file)
index 0000000..ce20e2d
--- /dev/null
+++ b/test/dm/rng.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2019, Linaro Limited
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <rng.h>
+#include <dm/test.h>
+#include <test/ut.h>
+
+/* Basic test of the rng uclass */
+static int dm_test_rng_read(struct unit_test_state *uts)
+{
+       unsigned long rand1 = 0, rand2 = 0;
+       struct udevice *dev;
+
+       ut_assertok(uclass_get_device(UCLASS_RNG, 0, &dev));
+       ut_assertnonnull(dev);
+       ut_assertok(dm_rng_read(dev, &rand1, sizeof(rand1)));
+       ut_assertok(dm_rng_read(dev, &rand2, sizeof(rand2)));
+       ut_assert(rand1 != rand2);
+
+       return 0;
+}
+DM_TEST(dm_test_rng_read, DM_TESTF_SCAN_PDATA | DM_TESTF_SCAN_FDT);