From: Jakub Kicinski Date: Sun, 18 Jan 2026 00:12:18 +0000 (-0800) Subject: Merge branch 'net-phy-realtek-simplify-and-reunify-c22-c45-drivers' X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ba4550d5d724b693b142812af435b0984fbb9da0;p=thirdparty%2Fkernel%2Flinux.git Merge branch 'net-phy-realtek-simplify-and-reunify-c22-c45-drivers' Daniel Golle says: ==================== net: phy: realtek: simplify and reunify C22/C45 drivers The RTL8221B PHY variants (VB-CG and VM-CG) were previously split into separate C22 and C45 driver instances to support copper SFP modules using the RollBall MDIO-over-I2C protocol, which only supports Clause-45 access. However, this split created significant code duplication and complexity. Commit 8af2136e77989 ("net: phy: realtek: add helper RTL822X_VND2_C22_REG") exposed that RealTek PHYs map all standard Clause-22 registers into MDIO_MMD_VEND2 at offset 0xa400. With commit 1850ec20d6e71 ("net: phy: realtek: use paged access for MDIO_MMD_VEND2 in C22 mode") it is now possible to access all MMD registers transparently, regardless of whether the PHY is accessed via C22 or C45 MDIO. Further improve the translation logic for this register mapping, so a single unified driver works efficiently with both access methods, reducing code duplication. The series also includes cleanup to remove unnecessary paged operations on registers that aren't actually affected by page selection. Testing was done on RTL8211F and RTL8221B-VB-CG (the latter in both C22 and C45 modes). ==================== Link: https://patch.msgid.link/cover.1768275364.git.daniel@makrotopia.org Signed-off-by: Jakub Kicinski --- ba4550d5d724b693b142812af435b0984fbb9da0