test: dm: add MDIO test
A very simple test for DM_MDIO, mimicks a register write/read through the
sandbox bus to a dummy PHY.
Signed-off-by: Alex Marginean <alexm.osslist@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/test/dm/mdio.c b/test/dm/mdio.c
new file mode 100644
index 0000000..5b66255
--- /dev/null
+++ b/test/dm/mdio.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2019
+ * Alex Marginean, NXP
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/test.h>
+#include <misc.h>
+#include <test/ut.h>
+#include <miiphy.h>
+
+/* macros copied over from mdio_sandbox.c */
+#define SANDBOX_PHY_ADDR 5
+#define SANDBOX_PHY_REG 0
+
+#define TEST_REG_VALUE 0xabcd
+
+static int dm_test_mdio(struct unit_test_state *uts)
+{
+ struct uclass *uc;
+ struct udevice *dev;
+ struct mdio_ops *ops;
+ u16 reg;
+
+ ut_assertok(uclass_get(UCLASS_MDIO, &uc));
+
+ ut_assertok(uclass_get_device_by_name(UCLASS_MDIO, "mdio-test", &dev));
+
+ ops = mdio_get_ops(dev);
+ ut_assertnonnull(ops);
+ ut_assertnonnull(ops->read);
+ ut_assertnonnull(ops->write);
+
+ ut_assertok(ops->write(dev, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
+ SANDBOX_PHY_REG, TEST_REG_VALUE));
+ reg = ops->read(dev, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
+ SANDBOX_PHY_REG);
+ ut_asserteq(reg, TEST_REG_VALUE);
+
+ ut_assert(ops->read(dev, SANDBOX_PHY_ADDR + 1, MDIO_DEVAD_NONE,
+ SANDBOX_PHY_REG) != 0);
+
+ ut_assertok(ops->reset(dev));
+ reg = ops->read(dev, SANDBOX_PHY_ADDR, MDIO_DEVAD_NONE,
+ SANDBOX_PHY_REG);
+ ut_asserteq(reg, 0);
+
+ return 0;
+}
+
+DM_TEST(dm_test_mdio, DM_TESTF_SCAN_FDT);