kernel/linux.git/drivers/net/phy/realtek, branch v7.0.11

net: phy: realtek: simplify bogus paged operations

2026-01-18T00:12:16+00:00

Only registers 0x10~0x17 are affected by the value in the page selection register 0x1f. Hence there is no point in using paged operations when accessing any other registers. Simplify the driver by using the normal phy_read and phy_write operations for registers which are anyway not affected by paging. Signed-off-by: Daniel Golle Link: https://patch.msgid.link/0c5cbb66ce3e72a011d76f8c3d61ebcac44483bb.1768275364.git.daniel@makrotopia.org Signed-off-by: Jakub Kicinski

net: phy: realtek: demystify PHYSR register location

2026-01-18T00:12:16+00:00

Turns out that register address RTL_VND2_PHYSR (0xa434) maps to Clause-22 register MII_RESV2. Use that to get rid of yet another magic number, and rename access macros accordingly. Signed-off-by: Daniel Golle Link: https://patch.msgid.link/6ed246e0aa3ca8038d2fa432d51518959fb89b6b.1768275364.git.daniel@makrotopia.org Signed-off-by: Jakub Kicinski

net: phy: realtek: reunify C22 and C45 drivers

2026-01-18T00:12:16+00:00

Reunify the split C22/C45 drivers for the RTL8221B-VB-CG 2.5Gbps and RTL8221B-VM-CG 2.5Gbps PHYs back into a single driver. This is possible now by using all the driver operations previously used by the C45 driver, as transparent access to all MMDs including MDIO_MMD_VEND2 is now possible also over Clause-22 MDIO. The unified driver will still only use Clause-45 access on any Clause-45 capable busses while still working fine on Clause-22 busses. Signed-off-by: Daniel Golle Link: https://patch.msgid.link/bffcb85fdc20e07056976962d3caaa1be5d0ddb0.1768275364.git.daniel@makrotopia.org Signed-off-by: Jakub Kicinski

net: phy: realtek: simplify C22 reg access via MDIO_MMD_VEND2

2026-01-18T00:12:16+00:00

RealTek 2.5GE PHYs have all standard Clause-22 registers mapped also inside MDIO_MMD_VEND2 at offset 0xa400. This is used mainly in case the PHY is connected to a Clause-45-only bus. The RTL8221B is frequently used in copper SFP module which uses the RollBall MDIO-over-I2C method which *only* supports Clause-45, for example. In order to support using the PHY on Clause-45-only busses, the PHY driver has previously been split into a C22-only and C45-only instances, creating quite a bit of redundancy and confusion. In preparation of reunifying the two driver instances, add support for translating MDIO_MMD_VEND2 registers 0xa400 to 0xa43c back to Clause-22 registers 0 to 30 in case the PHY is accessed on a Clause-22 bus. Signed-off-by: Daniel Golle Link: https://patch.msgid.link/fd49d86bd0445b76269fd3ea456c709c2066683f.1768275364.git.daniel@makrotopia.org Signed-off-by: Jakub Kicinski

net: phy: realtek: support interrupt also for C22 variants

2026-01-18T00:12:16+00:00

Now that access to MDIO_MMD_VEND2 works transparently also in Clause-22 mode, add interrupt support also for the C22 variants of the RTL8221B-VB-CG and RTL8221B-VM-CG. This results in the C22 and C45 driver instances now having all the same features implemented. Signed-off-by: Daniel Golle Link: https://patch.msgid.link/7620084b1de01580edc2d0e1b9548507fb4643a8.1768275364.git.daniel@makrotopia.org Signed-off-by: Jakub Kicinski

net: phy: realtek: fix in-band capabilities for 2.5G PHYs

2026-01-16T03:52:46+00:00

It looks like the configuration of in-band AN only affects SGMII, and it is always disabled for 2500Base-X. Adjust the reported capabilities accordingly. This is based on testing using OpenWrt on Zyxel XGS1010-12 rev A1 with RTL8226-CG, and Zyxel XGS1210-12 rev B1 with RTL8221B-VB-CG. On these devices, 2500Base-X in-band AN is known to work with some SFP modules (containing an unknown PHY). However, with the built-in Realtek PHYs, no auto-negotiation takes place, irrespective of the configuration of the PHY. Fixes: 10fbd71fc5f9b ("net: phy: realtek: implement configuring in-band an") Signed-off-by: Jan Hoffmann Reviewed-by: Daniel Golle Link: https://patch.msgid.link/20260113205557.503409-1-jan@3e8.eu Signed-off-by: Jakub Kicinski

net: phy: realtek: add dummy PHY driver for RTL8127ATF

2026-01-13T03:29:11+00:00

RTL8127ATF supports a SFP+ port for fiber modules (10GBASE-SR/LR/ER/ZR and DAC). The list of supported modes was provided by Realtek. According to the r8127 vendor driver also 1G modules are supported, but this needs some more complexity in the driver, and only 10G mode has been tested so far. Therefore mainline support will be limited to 10G for now. The SFP port signals are hidden in the chip IP and driven by firmware. Therefore mainline SFP support can't be used here. This PHY driver is used by the RTL8127ATF support in r8169. RTL8127ATF reports the same PHY ID as the TP version. Therefore use a dummy PHY ID. This PHY driver is used by the RTL8127ATF support in r8169. Signed-off-by: Heiner Kallweit Link: https://patch.msgid.link/e3d55162-210a-4fab-9abf-99c6954eee10@gmail.com Signed-off-by: Jakub Kicinski

net: phy: realtek: get rid of magic number in rtlgen_read_status()

2026-01-08T12:18:26+00:00

Use newly introduced helper macros RTL822X_VND2_TO_PAGE and RTL822X_VND2_TO_PAGE_REG to access RTL_VEND2_PHYSR register over Clause-22 paged access instead of using magic numbers. Signed-off-by: Daniel Golle Reviewed-by: Maxime Chevallier Link: https://patch.msgid.link/a53d4577335fdda4d363db9bc4bf614fd3a56c9b.1767630451.git.daniel@makrotopia.org Signed-off-by: Paolo Abeni

net: phy: realtek: use paged access for MDIO_MMD_VEND2 in C22 mode

2026-01-08T12:18:26+00:00

RTL822x cannot access MDIO_MMD_VEND2 via MII_MMD_CTRL/MII_MMD_DATA. A mapping to use paged access needs to be used instead. All other MMD devices can be accessed as usual. Implement phy_read_mmd and phy_write_mmd using paged access for MDIO_MMD_VEND2 in Clause-22 mode instead of relying on MII_MMD_CTRL/MII_MMD_DATA. This allows eg. rtl822x_config_aneg to work as expected in case the MDIO bus doesn't support Clause-45 access. Suggested-by: Bevan Weiss Signed-off-by: Daniel Golle Reviewed-by: Maxime Chevallier Link: https://patch.msgid.link/25aab7f02dac7c6022171455523e3db1435b0881.1767630451.git.daniel@makrotopia.org Signed-off-by: Paolo Abeni

net: phy: realtek: implement configuring in-band an

2026-01-08T12:18:26+00:00

Implement the inband_caps() and config_inband() PHY driver methods to allow configuring the use of in-band-status with SGMII and 2500Base-X on RTL8226 and RTL8221B 2.5GE PHYs. Signed-off-by: Daniel Golle Link: https://patch.msgid.link/82a78a06d67be19e856d646cf880b2021ea9d837.1767630451.git.daniel@makrotopia.org Signed-off-by: Paolo Abeni