Merge tag 'net-next-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextipvs/mainipvs/HEADipvs-next/mainipvs-next/HEADdavem/net-next/maindavem/net-next/HEAD

Pull networking updates from Paolo Abeni:
 "Core & protocols:

   - A significant effort all around the stack to guide the compiler to
     make the right choice when inlining code, to avoid unneeded calls
     for small helper and stack canary overhead in the fast-path.

     This generates better and faster code with very small or no text
     size increases, as in many cases the call generated more code than
     the actual inlined helper.

   - Extend AccECN implementation so that is now functionally complete,
     also allow the user-space enabling it on a per network namespace
     basis.

   - Add support for memory providers with large (above 4K) rx buffer.
     Paired with hw-gro, larger rx buffer sizes reduce the number of
     buffers traversing the stack, dincreasing single stream CPU usage
     by up to ~30%.

   - Do not add HBH header to Big TCP GSO packets. This simplifies the
     RX path, the TX path and the NIC drivers, and is possible because
     user-space taps can now interpret correctly such packets without
     the HBH hint.

   - Allow IPv6 routes to be configured with a gateway address that is
     resolved out of a different interface than the one specified,
     aligning IPv6 to IPv4 behavior.

   - Multi-queue aware sch_cake. This makes it possible to scale the
     rate shaper of sch_cake across multiple CPUs, while still enforcing
     a single global rate on the interface.

   - Add support for the nbcon (new buffer console) infrastructure to
     netconsole, enabling lock-free, priority-based console operations
     that are safer in crash scenarios.

   - Improve the TCP ipv6 output path to cache the flow information,
     saving cpu cycles, reducing cache line misses and stack use.

   - Improve netfilter packet tracker to resolve clashes for most
     protocols, avoiding unneeded drops on rare occasions.

   - Add IP6IP6 tunneling acceleration to the flowtable infrastructure.

   - Reduce tcp socket size by one cache line.

   - Notify neighbour changes atomically, avoiding inconsistencies
     between the notification sequence and the actual states sequence.

   - Add vsock namespace support, allowing complete isolation of vsocks
     across different network namespaces.

   - Improve xsk generic performances with cache-alignment-oriented
     optimizations.

   - Support netconsole automatic target recovery, allowing netconsole
     to reestablish targets when underlying low-level interface comes
     back online.

  Driver API:

   - Support for switching the working mode (automatic vs manual) of a
     DPLL device via netlink.

   - Introduce PHY ports representation to expose multiple front-facing
     media ports over a single MAC.

   - Introduce "rx-polarity" and "tx-polarity" device tree properties,
     to generalize polarity inversion requirements for differential
     signaling.

   - Add helper to create, prepare and enable managed clocks.

  Device drivers:

   - Add Huawei hinic3 PF etherner driver.

   - Add DWMAC glue driver for Motorcomm YT6801 PCIe ethernet
     controller.

   - Add ethernet driver for MaxLinear MxL862xx switches

   - Remove parallel-port Ethernet driver.

   - Convert existing driver timestamp configuration reporting to
     hwtstamp_get and remove legacy ioctl().

   - Convert existing drivers to .get_rx_ring_count(), simplifing the RX
     ring count retrieval. Also remove the legacy fallback path.

   - Ethernet high-speed NICs:
      - Broadcom (bnxt, bng):
         - bnxt: add FW interface update to support FEC stats histogram
           and NVRAM defragmentation
         - bng: add TSO and H/W GRO support
      - nVidia/Mellanox (mlx5):
         - improve latency of channel restart operations, reducing the
           used H/W resources
         - add TSO support for UDP over GRE over VLAN
         - add flow counters support for hardware steering (HWS) rules
         - use a static memory area to store headers for H/W GRO,
           leading to 12% RX tput improvement
      - Intel (100G, ice, idpf):
         - ice: reorganizes layout of Tx and Rx rings for cacheline
           locality and utilizes __cacheline_group* macros on the new
           layouts
         - ice: introduces Synchronous Ethernet (SyncE) support
      - Meta (fbnic):
         - adds debugfs for firmware mailbox and tx/rx rings vectors

   - Ethernet virtual:
      - geneve: introduce GRO/GSO support for double UDP encapsulation

   - Ethernet NICs consumer, and embedded:
      - Synopsys (stmmac):
         - some code refactoring and cleanups
      - RealTek (r8169):
         - add support for RTL8127ATF (10G Fiber SFP)
         - add dash and LTR support
      - Airoha:
         - AN8811HB 2.5 Gbps phy support
      - Freescale (fec):
         - add XDP zero-copy support
      - Thunderbolt:
         - add get link setting support to allow bonding
      - Renesas:
         - add support for RZ/G3L GBETH SoC

   - Ethernet switches:
      - Maxlinear:
         - support R(G)MII slow rate configuration
         - add support for Intel GSW150
      - Motorcomm (yt921x):
         - add DCB/QoS support
      - TI:
         - icssm-prueth: support bridging (STP/RSTP) via the switchdev
           framework

   - Ethernet PHYs:
      - Realtek:
         - enable SGMII and 2500Base-X in-band auto-negotiation
         - simplify and reunify C22/C45 drivers
      - Micrel: convert bindings to DT schema

   - CAN:
      - move skb headroom content into skb extensions, making CAN
        metadata access more robust

   - CAN drivers:
      - rcar_canfd:
         - add support for FD-only mode
         - add support for the RZ/T2H SoC
      - sja1000: cleanup the CAN state handling

   - WiFi:
      - implement EPPKE/802.1X over auth frames support
      - split up drop reasons better, removing generic RX_DROP
      - additional FTM capabilities: 6 GHz support, supported number of
        spatial streams and supported number of LTF repetitions
      - better mac80211 iterators to enumerate resources
      - initial UHR (Wi-Fi 8) support for cfg80211/mac80211

   - WiFi drivers:
      - Qualcomm/Atheros:
         - ath11k: support for Channel Frequency Response measurement
         - ath12k: a significant driver refactor to support multi-wiphy
           devices and and pave the way for future device support in the
           same driver (rather than splitting to ath13k)
         - ath12k: support for the QCC2072 chipset
      - Intel:
         - iwlwifi: partial Neighbor Awareness Networking (NAN) support
         - iwlwifi: initial support for U-NII-9 and IEEE 802.11bn
      - RealTek (rtw89):
         - preparations for RTL8922DE support

   - Bluetooth:
      - implement setsockopt(BT_PHY) to set the connection packet type/PHY
      - set link_policy on incoming ACL connections

   - Bluetooth drivers:
      - btusb: add support for MediaTek7920, Realtek RTL8761BU and 8851BE
      - btqca: add WCN6855 firmware priority selection feature"

* tag 'net-next-7.0' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1254 commits)
  bnge/bng_re: Add a new HSI
  net: macb: Fix tx/rx malfunction after phy link down and up
  af_unix: Fix memleak of newsk in unix_stream_connect().
  net: ti: icssg-prueth: Add optional dependency on HSR
  net: dsa: add basic initial driver for MxL862xx switches
  net: mdio: add unlocked mdiodev C45 bus accessors
  net: dsa: add tag format for MxL862xx switches
  dt-bindings: net: dsa: add MaxLinear MxL862xx
  selftests: drivers: net: hw: Modify toeplitz.c to poll for packets
  octeontx2-pf: Unregister devlink on probe failure
  net: renesas: rswitch: fix forwarding offload statemachine
  ionic: Rate limit unknown xcvr type messages
  tcp: inet6_csk_xmit() optimization
  tcp: populate inet->cork.fl.u.ip6 in tcp_v6_syn_recv_sock()
  tcp: populate inet->cork.fl.u.ip6 in tcp_v6_connect()
  ipv6: inet6_csk_xmit() and inet6_csk_update_pmtu() use inet->cork.fl.u.ip6
  ipv6: use inet->cork.fl.u.ip6 and np->final in ip6_datagram_dst_update()
  ipv6: use np->final in inet6_sk_rebuild_header()
  ipv6: add daddr/final storage in struct ipv6_pinfo
  net: stmmac: qcom-ethqos: fix qcom_ethqos_serdes_powerup()
  ...

4 files changed, 655 insertions, 0 deletions

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 678dd0452f0a..62153a3924b9 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -5,6 +5,28 @@
 
 menu "PHY Subsystem"
 
+config PHY_COMMON_PROPS
+	bool
+	help
+	  This parses properties common between generic PHYs and Ethernet PHYs.
+
+	  Select this from consumer drivers to gain access to helpers for
+	  parsing properties from the
+	  Documentation/devicetree/bindings/phy/phy-common-props.yaml schema.
+
+config PHY_COMMON_PROPS_TEST
+	tristate "KUnit tests for PHY common props" if !KUNIT_ALL_TESTS
+	select PHY_COMMON_PROPS
+	depends on KUNIT
+	default KUNIT_ALL_TESTS
+	help
+	  This builds KUnit tests for the PHY common property API.
+
+	  For more information on KUnit and unit tests in general,
+	  please refer to the KUnit documentation in Documentation/dev-tools/kunit/.
+
+	  When in doubt, say N.
+
 config GENERIC_PHY
 	bool "PHY Core"
 	help
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index bfb27fb5a494..30b150d68de7 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -3,6 +3,8 @@
 # Makefile for the phy drivers.
 #
 
+obj-$(CONFIG_PHY_COMMON_PROPS)		+= phy-common-props.o
+obj-$(CONFIG_PHY_COMMON_PROPS_TEST)	+= phy-common-props-test.o
 obj-$(CONFIG_GENERIC_PHY)		+= phy-core.o
 obj-$(CONFIG_GENERIC_PHY_MIPI_DPHY)	+= phy-core-mipi-dphy.o
 obj-$(CONFIG_PHY_CAN_TRANSCEIVER)	+= phy-can-transceiver.o
diff --git a/drivers/phy/phy-common-props-test.c b/drivers/phy/phy-common-props-test.c
new file mode 100644
index 000000000000..e937ec8a4126
--- /dev/null
+++ b/drivers/phy/phy-common-props-test.c
@@ -0,0 +1,422 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * phy-common-props-test.c  --  Unit tests for PHY common properties API
+ *
+ * Copyright 2025-2026 NXP
+ */
+#include <kunit/test.h>
+#include <linux/property.h>
+#include <linux/phy/phy-common-props.h>
+#include <dt-bindings/phy/phy.h>
+
+/* Test: rx-polarity property is missing */
+static void phy_test_rx_polarity_is_missing(struct kunit *test)
+{
+	static const struct property_entry entries[] = {
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+	KUNIT_EXPECT_EQ(test, val, PHY_POL_NORMAL);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: rx-polarity has more values than rx-polarity-names */
+static void phy_test_rx_polarity_more_values_than_names(struct kunit *test)
+{
+	static const u32 rx_pol[] = { PHY_POL_NORMAL, PHY_POL_INVERT, PHY_POL_NORMAL };
+	static const char * const rx_pol_names[] = { "sgmii", "2500base-x" };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("rx-polarity", rx_pol),
+		PROPERTY_ENTRY_STRING_ARRAY("rx-polarity-names", rx_pol_names),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, -EINVAL);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: rx-polarity has 1 value and rx-polarity-names does not exist */
+static void phy_test_rx_polarity_single_value_no_names(struct kunit *test)
+{
+	static const u32 rx_pol[] = { PHY_POL_INVERT };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("rx-polarity", rx_pol),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+	KUNIT_EXPECT_EQ(test, val, PHY_POL_INVERT);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: rx-polarity-names has more values than rx-polarity */
+static void phy_test_rx_polarity_more_names_than_values(struct kunit *test)
+{
+	static const u32 rx_pol[] = { PHY_POL_NORMAL, PHY_POL_INVERT };
+	static const char * const rx_pol_names[] = { "sgmii", "2500base-x", "1000base-x" };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("rx-polarity", rx_pol),
+		PROPERTY_ENTRY_STRING_ARRAY("rx-polarity-names", rx_pol_names),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, -EINVAL);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: rx-polarity and rx-polarity-names have same length, find the name */
+static void phy_test_rx_polarity_find_by_name(struct kunit *test)
+{
+	static const u32 rx_pol[] = { PHY_POL_NORMAL, PHY_POL_INVERT, PHY_POL_AUTO };
+	static const char * const rx_pol_names[] = { "sgmii", "2500base-x", "usb-ss" };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("rx-polarity", rx_pol),
+		PROPERTY_ENTRY_STRING_ARRAY("rx-polarity-names", rx_pol_names),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+	KUNIT_EXPECT_EQ(test, val, PHY_POL_NORMAL);
+
+	ret = phy_get_manual_rx_polarity(node, "2500base-x", &val);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+	KUNIT_EXPECT_EQ(test, val, PHY_POL_INVERT);
+
+	ret = phy_get_rx_polarity(node, "usb-ss", BIT(PHY_POL_AUTO),
+				  PHY_POL_AUTO, &val);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+	KUNIT_EXPECT_EQ(test, val, PHY_POL_AUTO);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: same length, name not found, no "default" - error */
+static void phy_test_rx_polarity_name_not_found_no_default(struct kunit *test)
+{
+	static const u32 rx_pol[] = { PHY_POL_NORMAL, PHY_POL_INVERT };
+	static const char * const rx_pol_names[] = { "2500base-x", "1000base-x" };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("rx-polarity", rx_pol),
+		PROPERTY_ENTRY_STRING_ARRAY("rx-polarity-names", rx_pol_names),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, -EINVAL);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: same length, name not found, but "default" exists */
+static void phy_test_rx_polarity_name_not_found_with_default(struct kunit *test)
+{
+	static const u32 rx_pol[] = { PHY_POL_NORMAL, PHY_POL_INVERT };
+	static const char * const rx_pol_names[] = { "2500base-x", "default" };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("rx-polarity", rx_pol),
+		PROPERTY_ENTRY_STRING_ARRAY("rx-polarity-names", rx_pol_names),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+	KUNIT_EXPECT_EQ(test, val, PHY_POL_INVERT);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: polarity found but value is unsupported */
+static void phy_test_rx_polarity_unsupported_value(struct kunit *test)
+{
+	static const u32 rx_pol[] = { PHY_POL_AUTO };
+	static const char * const rx_pol_names[] = { "sgmii" };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("rx-polarity", rx_pol),
+		PROPERTY_ENTRY_STRING_ARRAY("rx-polarity-names", rx_pol_names),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_rx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, -EOPNOTSUPP);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: tx-polarity property is missing */
+static void phy_test_tx_polarity_is_missing(struct kunit *test)
+{
+	static const struct property_entry entries[] = {
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+	KUNIT_EXPECT_EQ(test, val, PHY_POL_NORMAL);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: tx-polarity has more values than tx-polarity-names */
+static void phy_test_tx_polarity_more_values_than_names(struct kunit *test)
+{
+	static const u32 tx_pol[] = { PHY_POL_NORMAL, PHY_POL_INVERT, PHY_POL_NORMAL };
+	static const char * const tx_pol_names[] = { "sgmii", "2500base-x" };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("tx-polarity", tx_pol),
+		PROPERTY_ENTRY_STRING_ARRAY("tx-polarity-names", tx_pol_names),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, -EINVAL);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: tx-polarity has 1 value and tx-polarity-names does not exist */
+static void phy_test_tx_polarity_single_value_no_names(struct kunit *test)
+{
+	static const u32 tx_pol[] = { PHY_POL_INVERT };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("tx-polarity", tx_pol),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+	KUNIT_EXPECT_EQ(test, val, PHY_POL_INVERT);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: tx-polarity-names has more values than tx-polarity */
+static void phy_test_tx_polarity_more_names_than_values(struct kunit *test)
+{
+	static const u32 tx_pol[] = { PHY_POL_NORMAL, PHY_POL_INVERT };
+	static const char * const tx_pol_names[] = { "sgmii", "2500base-x", "1000base-x" };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("tx-polarity", tx_pol),
+		PROPERTY_ENTRY_STRING_ARRAY("tx-polarity-names", tx_pol_names),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, -EINVAL);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: tx-polarity and tx-polarity-names have same length, find the name */
+static void phy_test_tx_polarity_find_by_name(struct kunit *test)
+{
+	static const u32 tx_pol[] = { PHY_POL_NORMAL, PHY_POL_INVERT, PHY_POL_NORMAL };
+	static const char * const tx_pol_names[] = { "sgmii", "2500base-x", "1000base-x" };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("tx-polarity", tx_pol),
+		PROPERTY_ENTRY_STRING_ARRAY("tx-polarity-names", tx_pol_names),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+	KUNIT_EXPECT_EQ(test, val, PHY_POL_NORMAL);
+
+	ret = phy_get_manual_tx_polarity(node, "2500base-x", &val);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+	KUNIT_EXPECT_EQ(test, val, PHY_POL_INVERT);
+
+	ret = phy_get_manual_tx_polarity(node, "1000base-x", &val);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+	KUNIT_EXPECT_EQ(test, val, PHY_POL_NORMAL);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: same length, name not found, no "default" - error */
+static void phy_test_tx_polarity_name_not_found_no_default(struct kunit *test)
+{
+	static const u32 tx_pol[] = { PHY_POL_NORMAL, PHY_POL_INVERT };
+	static const char * const tx_pol_names[] = { "2500base-x", "1000base-x" };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("tx-polarity", tx_pol),
+		PROPERTY_ENTRY_STRING_ARRAY("tx-polarity-names", tx_pol_names),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, -EINVAL);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: same length, name not found, but "default" exists */
+static void phy_test_tx_polarity_name_not_found_with_default(struct kunit *test)
+{
+	static const u32 tx_pol[] = { PHY_POL_NORMAL, PHY_POL_INVERT };
+	static const char * const tx_pol_names[] = { "2500base-x", "default" };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("tx-polarity", tx_pol),
+		PROPERTY_ENTRY_STRING_ARRAY("tx-polarity-names", tx_pol_names),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, 0);
+	KUNIT_EXPECT_EQ(test, val, PHY_POL_INVERT);
+
+	fwnode_remove_software_node(node);
+}
+
+/* Test: polarity found but value is unsupported (AUTO for TX) */
+static void phy_test_tx_polarity_unsupported_value(struct kunit *test)
+{
+	static const u32 tx_pol[] = { PHY_POL_AUTO };
+	static const char * const tx_pol_names[] = { "sgmii" };
+	static const struct property_entry entries[] = {
+		PROPERTY_ENTRY_U32_ARRAY("tx-polarity", tx_pol),
+		PROPERTY_ENTRY_STRING_ARRAY("tx-polarity-names", tx_pol_names),
+		{}
+	};
+	struct fwnode_handle *node;
+	unsigned int val;
+	int ret;
+
+	node = fwnode_create_software_node(entries, NULL);
+	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, node);
+
+	ret = phy_get_manual_tx_polarity(node, "sgmii", &val);
+	KUNIT_EXPECT_EQ(test, ret, -EOPNOTSUPP);
+
+	fwnode_remove_software_node(node);
+}
+
+static struct kunit_case phy_common_props_test_cases[] = {
+	KUNIT_CASE(phy_test_rx_polarity_is_missing),
+	KUNIT_CASE(phy_test_rx_polarity_more_values_than_names),
+	KUNIT_CASE(phy_test_rx_polarity_single_value_no_names),
+	KUNIT_CASE(phy_test_rx_polarity_more_names_than_values),
+	KUNIT_CASE(phy_test_rx_polarity_find_by_name),
+	KUNIT_CASE(phy_test_rx_polarity_name_not_found_no_default),
+	KUNIT_CASE(phy_test_rx_polarity_name_not_found_with_default),
+	KUNIT_CASE(phy_test_rx_polarity_unsupported_value),
+	KUNIT_CASE(phy_test_tx_polarity_is_missing),
+	KUNIT_CASE(phy_test_tx_polarity_more_values_than_names),
+	KUNIT_CASE(phy_test_tx_polarity_single_value_no_names),
+	KUNIT_CASE(phy_test_tx_polarity_more_names_than_values),
+	KUNIT_CASE(phy_test_tx_polarity_find_by_name),
+	KUNIT_CASE(phy_test_tx_polarity_name_not_found_no_default),
+	KUNIT_CASE(phy_test_tx_polarity_name_not_found_with_default),
+	KUNIT_CASE(phy_test_tx_polarity_unsupported_value),
+	{}
+};
+
+static struct kunit_suite phy_common_props_test_suite = {
+	.name = "phy-common-props",
+	.test_cases = phy_common_props_test_cases,
+};
+
+kunit_test_suite(phy_common_props_test_suite);
+
+MODULE_DESCRIPTION("Test module for PHY common properties API");
+MODULE_AUTHOR("Vladimir Oltean <vladimir.oltean@nxp.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/phy/phy-common-props.c b/drivers/phy/phy-common-props.c
new file mode 100644
index 000000000000..3e814bcbea86
--- /dev/null
+++ b/drivers/phy/phy-common-props.c
@@ -0,0 +1,209 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * phy-common-props.c  --  Common PHY properties
+ *
+ * Copyright 2025-2026 NXP
+ */
+#include <linux/export.h>
+#include <linux/fwnode.h>
+#include <linux/phy/phy-common-props.h>
+#include <linux/printk.h>
+#include <linux/property.h>
+#include <linux/slab.h>
+
+/**
+ * fwnode_get_u32_prop_for_name - Find u32 property by name, or default value
+ * @fwnode: Pointer to firmware node, or NULL to use @default_val
+ * @name: Property name used as lookup key in @names_title (must not be NULL)
+ * @props_title: Name of u32 array property holding values
+ * @names_title: Name of string array property holding lookup keys
+ * @default_val: Default value if @fwnode is NULL or @props_title is empty
+ * @val: Pointer to store the returned value
+ *
+ * This function retrieves a u32 value from @props_title based on a name lookup
+ * in @names_title. The value stored in @val is determined as follows:
+ *
+ * - If @fwnode is NULL or @props_title is empty: @default_val is used
+ * - If @props_title has exactly one element and @names_title is empty:
+ *   that element is used
+ * - Otherwise: @val is set to the element at the same index where @name is
+ *   found in @names_title.
+ * - If @name is not found, the function looks for a "default" entry in
+ *   @names_title and uses the corresponding value from @props_title
+ *
+ * When both @props_title and @names_title are present, they must have the
+ * same number of elements (except when @props_title has exactly one element).
+ *
+ * Return: zero on success, negative error on failure.
+ */
+static int fwnode_get_u32_prop_for_name(struct fwnode_handle *fwnode,
+					const char *name,
+					const char *props_title,
+					const char *names_title,
+					unsigned int default_val,
+					unsigned int *val)
+{
+	int err, n_props, n_names, idx;
+	u32 *props;
+
+	if (!name) {
+		pr_err("Lookup key inside \"%s\" is mandatory\n", names_title);
+		return -EINVAL;
+	}
+
+	n_props = fwnode_property_count_u32(fwnode, props_title);
+	if (n_props <= 0) {
+		/* fwnode is NULL, or is missing requested property */
+		*val = default_val;
+		return 0;
+	}
+
+	n_names = fwnode_property_string_array_count(fwnode, names_title);
+	if (n_names >= 0 && n_props != n_names) {
+		pr_err("%pfw mismatch between \"%s\" and \"%s\" property count (%d vs %d)\n",
+		       fwnode, props_title, names_title, n_props, n_names);
+		return -EINVAL;
+	}
+
+	idx = fwnode_property_match_string(fwnode, names_title, name);
+	if (idx < 0)
+		idx = fwnode_property_match_string(fwnode, names_title, "default");
+	/*
+	 * If the mode name is missing, it can only mean the specified property
+	 * is the default one for all modes, so reject any other property count
+	 * than 1.
+	 */
+	if (idx < 0 && n_props != 1) {
+		pr_err("%pfw \"%s \" property has %d elements, but cannot find \"%s\" in \"%s\" and there is no default value\n",
+		       fwnode, props_title, n_props, name, names_title);
+		return -EINVAL;
+	}
+
+	if (n_props == 1) {
+		err = fwnode_property_read_u32(fwnode, props_title, val);
+		if (err)
+			return err;
+
+		return 0;
+	}
+
+	/* We implicitly know idx >= 0 here */
+	props = kcalloc(n_props, sizeof(*props), GFP_KERNEL);
+	if (!props)
+		return -ENOMEM;
+
+	err = fwnode_property_read_u32_array(fwnode, props_title, props, n_props);
+	if (err >= 0)
+		*val = props[idx];
+
+	kfree(props);
+
+	return err;
+}
+
+static int phy_get_polarity_for_mode(struct fwnode_handle *fwnode,
+				     const char *mode_name,
+				     unsigned int supported,
+				     unsigned int default_val,
+				     const char *polarity_prop,
+				     const char *names_prop,
+				     unsigned int *val)
+{
+	int err;
+
+	err = fwnode_get_u32_prop_for_name(fwnode, mode_name, polarity_prop,
+					   names_prop, default_val, val);
+	if (err)
+		return err;
+
+	if (!(supported & BIT(*val))) {
+		pr_err("%d is not a supported value for %pfw '%s' element '%s'\n",
+		       *val, fwnode, polarity_prop, mode_name);
+		err = -EOPNOTSUPP;
+	}
+
+	return err;
+}
+
+/**
+ * phy_get_rx_polarity - Get RX polarity for PHY differential lane
+ * @fwnode: Pointer to the PHY's firmware node.
+ * @mode_name: The name of the PHY mode to look up.
+ * @supported: Bit mask of PHY_POL_NORMAL, PHY_POL_INVERT and PHY_POL_AUTO
+ * @default_val: Default polarity value if property is missing
+ * @val: Pointer to returned polarity.
+ *
+ * Return: zero on success, negative error on failure.
+ */
+int __must_check phy_get_rx_polarity(struct fwnode_handle *fwnode,
+				     const char *mode_name,
+				     unsigned int supported,
+				     unsigned int default_val,
+				     unsigned int *val)
+{
+	return phy_get_polarity_for_mode(fwnode, mode_name, supported,
+					 default_val, "rx-polarity",
+					 "rx-polarity-names", val);
+}
+EXPORT_SYMBOL_GPL(phy_get_rx_polarity);
+
+/**
+ * phy_get_tx_polarity - Get TX polarity for PHY differential lane
+ * @fwnode: Pointer to the PHY's firmware node.
+ * @mode_name: The name of the PHY mode to look up.
+ * @supported: Bit mask of PHY_POL_NORMAL and PHY_POL_INVERT
+ * @default_val: Default polarity value if property is missing
+ * @val: Pointer to returned polarity.
+ *
+ * Return: zero on success, negative error on failure.
+ */
+int __must_check phy_get_tx_polarity(struct fwnode_handle *fwnode,
+				     const char *mode_name, unsigned int supported,
+				     unsigned int default_val, unsigned int *val)
+{
+	return phy_get_polarity_for_mode(fwnode, mode_name, supported,
+					 default_val, "tx-polarity",
+					 "tx-polarity-names", val);
+}
+EXPORT_SYMBOL_GPL(phy_get_tx_polarity);
+
+/**
+ * phy_get_manual_rx_polarity - Get manual RX polarity for PHY differential lane
+ * @fwnode: Pointer to the PHY's firmware node.
+ * @mode_name: The name of the PHY mode to look up.
+ * @val: Pointer to returned polarity.
+ *
+ * Helper for PHYs which do not support protocols with automatic RX polarity
+ * detection and correction.
+ *
+ * Return: zero on success, negative error on failure.
+ */
+int __must_check phy_get_manual_rx_polarity(struct fwnode_handle *fwnode,
+					    const char *mode_name,
+					    unsigned int *val)
+{
+	return phy_get_rx_polarity(fwnode, mode_name,
+				   BIT(PHY_POL_NORMAL) | BIT(PHY_POL_INVERT),
+				   PHY_POL_NORMAL, val);
+}
+EXPORT_SYMBOL_GPL(phy_get_manual_rx_polarity);
+
+/**
+ * phy_get_manual_tx_polarity - Get manual TX polarity for PHY differential lane
+ * @fwnode: Pointer to the PHY's firmware node.
+ * @mode_name: The name of the PHY mode to look up.
+ * @val: Pointer to returned polarity.
+ *
+ * Helper for PHYs without any custom default value for the TX polarity.
+ *
+ * Return: zero on success, negative error on failure.
+ */
+int __must_check phy_get_manual_tx_polarity(struct fwnode_handle *fwnode,
+					    const char *mode_name,
+					    unsigned int *val)
+{
+	return phy_get_tx_polarity(fwnode, mode_name,
+				   BIT(PHY_POL_NORMAL) | BIT(PHY_POL_INVERT),
+				   PHY_POL_NORMAL, val);
+}
+EXPORT_SYMBOL_GPL(phy_get_manual_tx_polarity);