Sander Vanheule 4a7945ee84 realtek: Add driver for auxiliary MDIO busses
Add a driver that exposes the auxiliary busses, used for the RTL8231
expanders, as a proper MDIO controller. The device must be instantiated
under an MFD device, so the driver should also be compatible with SoC
managed by an external CPU via SPI.

Leave the driver disabled in builds until required.

Signed-off-by: Sander Vanheule <sander@svanheule.net>
(cherry picked from commit ae833c01b312258c27ff2dc1c8d44b15b7028e32)
2025-02-22 12:32:34 +01:00
..