kernel/linux.git/drivers/net/dsa/mxl862xx, branch linux-7.0.y

net: dsa: mxl862xx: don't set user_mii_bus

2026-03-11T02:18:13+00:00

The PHY addresses in the MII bus are not equal to the port addresses, so the bus cannot be assigned as user_mii_bus. Falling back on the user_mii_bus in case a PHY isn't declared in device tree will result in using the wrong (in this case: off-by-+1) PHY. Remove the wrong assignment. Fixes: 23794bec1cb60 ("net: dsa: add basic initial driver for MxL862xx switches") Suggested-by: Vladimir Oltean Signed-off-by: Daniel Golle Reviewed-by: Vladimir Oltean Link: https://patch.msgid.link/0f0df310fd8cab57e0e5e3d0831dd057fd05bcd5.1773103271.git.daniel@makrotopia.org Signed-off-by: Jakub Kicinski

net: dsa: MxL862xx: don't force-enable MAXLINEAR_GPHY

2026-02-18T01:10:28+00:00

The newly added dsa driver attempts to enable the corresponding PHY driver, but that one has additional dependencies that may not be available: WARNING: unmet direct dependencies detected for MAXLINEAR_GPHY Depends on [m]: NETDEVICES [=y] && PHYLIB [=y] && (HWMON [=m] || HWMON [=m]=n [=n]) Selected by [y]: - NET_DSA_MXL862 [=y] && NETDEVICES [=y] && NET_DSA [=y] aarch64-linux-ld: drivers/net/phy/mxl-gpy.o: in function `gpy_probe': mxl-gpy.c:(.text.gpy_probe+0x13c): undefined reference to `devm_hwmon_device_register_with_info' aarch64-linux-ld: drivers/net/phy/mxl-gpy.o: in function `gpy_hwmon_read': mxl-gpy.c:(.text.gpy_hwmon_read+0x48): undefined reference to `polynomial_calc' There is actually no compile-time dependency, as DSA correctly uses the PHY abstractions. Remove the 'select' statement to reduce the complexity. Fixes: 23794bec1cb6 ("net: dsa: add basic initial driver for MxL862xx switches") Signed-off-by: Arnd Bergmann Reviewed-by: Daniel Golle Link: https://patch.msgid.link/20260216105522.2382373-1-arnd@kernel.org Signed-off-by: Jakub Kicinski

net: dsa: add basic initial driver for MxL862xx switches

2026-02-11T10:27:58+00:00

Add very basic DSA driver for MaxLinear's MxL862xx switches. In contrast to previous MaxLinear switches the MxL862xx has a built-in processor that runs a sophisticated firmware based on Zephyr RTOS. Interaction between the host and the switch hence is organized using a software API of that firmware rather than accessing hardware registers directly. Add descriptions of the most basic firmware API calls to access the built-in MDIO bus hosting the 2.5GE PHYs, basic port control as well as setting up the CPU port. Implement a very basic DSA driver using that API which is sufficient to get packets flowing between the user ports and the CPU port. The firmware offers all features one would expect from a modern switch hardware, they are going to be added one by one in follow-up patch series. Signed-off-by: Daniel Golle Link: https://patch.msgid.link/ccde07e8cf33d8ae243000013b57cfaa2695e0a9.1770433307.git.daniel@makrotopia.org Reviewed-by: Vladimir Oltean Signed-off-by: Paolo Abeni