test: dm: add PHY common props unit tests and sandbox DT nodes

Add sandbox DM unit tests for the PHY common properties library and the
corresponding device tree test nodes to arch/sandbox/dts/test.dts.
Also enable CONFIG_PHY_COMMON_PROPS in configs/sandbox_defconfig so
the tests are built and run in the sandbox environment.

The test file covers rx/tx polarity lookups for all relevant cases:

  - missing property (defaults to PHY_POL_NORMAL)
  - single value without names array (applies to all modes)
  - count mismatch between values and names arrays (-EINVAL)
  - name found by exact match
  - name not found with no "default" fallback (-EINVAL)
  - name not found with a "default" entry (uses fallback value)
  - unsupported polarity value (-EOPNOTSUPP)

Ported from Linux KUnit test:
  linux/drivers/phy/phy-common-props-test.c

Signed-off-by: Lucien.Jheng <[email protected]>

2 files changed, 320 insertions, 0 deletions

diff --git a/test/dm/Makefile b/test/dm/Makefile
index 771b703b737..d69b0e08d66 100644
--- a/test/dm/Makefile
+++ b/test/dm/Makefile
@@ -88,6 +88,7 @@ obj-$(CONFIG_P2SB) += p2sb.o
 obj-$(CONFIG_PCI_ENDPOINT) += pci_ep.o
 obj-$(CONFIG_PCH) += pch.o
 obj-$(CONFIG_PHY) += phy.o
+obj-$(CONFIG_PHY_COMMON_PROPS) += phy_common_props.o
 ifneq ($(CONFIG_PINMUX),)
 obj-$(CONFIG_PINCONF) += pinmux.o
 endif
diff --git a/test/dm/phy_common_props.c b/test/dm/phy_common_props.c
new file mode 100644
index 00000000000..21f5042b7a0
--- /dev/null
+++ b/test/dm/phy_common_props.c
@@ -0,0 +1,319 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * U-Boot sandbox DM tests for PHY common props
+ *
+ * Ported from Linux KUnit test:
+ *   linux/drivers/phy/phy-common-props-test.c
+ *
+ * Copyright 2025-2026 NXP
+ */
+#include <dm.h>
+#include <dm/ofnode.h>
+#include <dm/test.h>
+#include <linux/bitops.h>
+#include <linux/phy/phy-common-props.h>
+#include <dt-bindings/phy/phy.h>
+#include <test/test.h>
+#include <test/ut.h>
+
+/* --- RX polarity tests -------------------------------------------------- */
+
+/* Test: rx-polarity property is missing => default PHY_POL_NORMAL */
+static int dm_test_phy_common_props_rx_missing(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-missing");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	ut_asserteq(0, ret);
+	ut_asserteq(PHY_POL_NORMAL, val);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_rx_missing, UTF_SCAN_FDT);
+
+/* Test: rx-polarity has more values than rx-polarity-names => -EINVAL */
+static int dm_test_phy_common_props_rx_more_values(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-more-values");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	ut_asserteq(-EINVAL, ret);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_rx_more_values, UTF_SCAN_FDT);
+
+/* Test: rx-polarity has 1 value and rx-polarity-names does not exist */
+static int dm_test_phy_common_props_rx_single_value(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-single");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	ut_asserteq(0, ret);
+	ut_asserteq(PHY_POL_INVERT, val);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_rx_single_value, UTF_SCAN_FDT);
+
+/* Test: rx-polarity-names has more values than rx-polarity => -EINVAL */
+static int dm_test_phy_common_props_rx_more_names(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-more-names");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	ut_asserteq(-EINVAL, ret);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_rx_more_names, UTF_SCAN_FDT);
+
+/* Test: valid arrays, find polarity by mode name */
+static int dm_test_phy_common_props_rx_find_by_name(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-find-by-name");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	ut_asserteq(0, ret);
+	ut_asserteq(PHY_POL_NORMAL, val);
+
+	ret = phy_get_manual_rx_polarity(node, "2500base-x", &val);
+	ut_asserteq(0, ret);
+	ut_asserteq(PHY_POL_INVERT, val);
+
+	/* "usb-ss" has PHY_POL_AUTO; auto is supported here */
+	ret = phy_get_rx_polarity(node, "usb-ss", BIT(PHY_POL_AUTO),
+				  PHY_POL_AUTO, &val);
+	ut_asserteq(0, ret);
+	ut_asserteq(PHY_POL_AUTO, val);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_rx_find_by_name, UTF_SCAN_FDT);
+
+/* Test: name not found, no "default" entry => -EINVAL */
+static int dm_test_phy_common_props_rx_no_default(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-no-default");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	ut_asserteq(-EINVAL, ret);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_rx_no_default, UTF_SCAN_FDT);
+
+/* Test: name not found, "default" entry exists => use default polarity */
+static int dm_test_phy_common_props_rx_with_default(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-with-default");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	ut_asserteq(0, ret);
+	ut_asserteq(PHY_POL_INVERT, val);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_rx_with_default, UTF_SCAN_FDT);
+
+/* Test: polarity value found but not in supported set => -EOPNOTSUPP */
+static int dm_test_phy_common_props_rx_unsupported(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-unsupported");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	ut_asserteq(-EOPNOTSUPP, ret);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_rx_unsupported, UTF_SCAN_FDT);
+
+/* --- TX polarity tests -------------------------------------------------- */
+
+/* Test: tx-polarity property is missing => default PHY_POL_NORMAL */
+static int dm_test_phy_common_props_tx_missing(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-missing");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	ut_asserteq(0, ret);
+	ut_asserteq(PHY_POL_NORMAL, val);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_tx_missing, UTF_SCAN_FDT);
+
+/* Test: tx-polarity has more values than tx-polarity-names => -EINVAL */
+static int dm_test_phy_common_props_tx_more_values(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-more-values");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	ut_asserteq(-EINVAL, ret);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_tx_more_values, UTF_SCAN_FDT);
+
+/* Test: tx-polarity has 1 value and tx-polarity-names does not exist */
+static int dm_test_phy_common_props_tx_single_value(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-single");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	ut_asserteq(0, ret);
+	ut_asserteq(PHY_POL_INVERT, val);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_tx_single_value, UTF_SCAN_FDT);
+
+/* Test: tx-polarity-names has more values than tx-polarity => -EINVAL */
+static int dm_test_phy_common_props_tx_more_names(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-more-names");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	ut_asserteq(-EINVAL, ret);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_tx_more_names, UTF_SCAN_FDT);
+
+/* Test: valid arrays, find polarity by mode name */
+static int dm_test_phy_common_props_tx_find_by_name(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-find-by-name");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	ut_asserteq(0, ret);
+	ut_asserteq(PHY_POL_NORMAL, val);
+
+	ret = phy_get_manual_tx_polarity(node, "2500base-x", &val);
+	ut_asserteq(0, ret);
+	ut_asserteq(PHY_POL_INVERT, val);
+
+	ret = phy_get_manual_tx_polarity(node, "1000base-x", &val);
+	ut_asserteq(0, ret);
+	ut_asserteq(PHY_POL_NORMAL, val);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_tx_find_by_name, UTF_SCAN_FDT);
+
+/* Test: name not found, no "default" entry => -EINVAL */
+static int dm_test_phy_common_props_tx_no_default(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-no-default");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	ut_asserteq(-EINVAL, ret);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_tx_no_default, UTF_SCAN_FDT);
+
+/* Test: name not found, "default" entry exists => use default polarity */
+static int dm_test_phy_common_props_tx_with_default(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-with-default");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	ut_asserteq(0, ret);
+	ut_asserteq(PHY_POL_INVERT, val);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_tx_with_default, UTF_SCAN_FDT);
+
+/* Test: polarity value found but not in supported set => -EOPNOTSUPP */
+static int dm_test_phy_common_props_tx_unsupported(struct unit_test_state *uts)
+{
+	ofnode node = ofnode_path("/phy-common-props-unsupported");
+	unsigned int val;
+	int ret;
+
+	ut_assert(ofnode_valid(node));
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	ut_asserteq(-EOPNOTSUPP, ret);
+
+	return 0;
+}
+
+DM_TEST(dm_test_phy_common_props_tx_unsupported, UTF_SCAN_FDT);