Setting the RMII Reference Clock Select bit enables 25 MHz rather
than 50 MHz clock mode.
Note that this option in only needed for certain PHY revisions with a
non-standard, inverted function of this configuration bit.
Specifically, a clock reference ("rmii-ref" below) is always needed to
actually select a mode.
- clocks, clock-names: contains clocks according to the common clock bindings.
supported clocks:
- KSZ8021, KSZ8031, KSZ8081, KSZ8091: "rmii-ref": The RMII reference
input clock. Used to determine the XI input clock.
- micrel,fiber-mode: If present the PHY is configured to operate in fiber mode
Some PHYs, such as the KSZ8041FTL variant, support fiber mode, enabled
by the FXEN boot strapping pin. It can't be determined from the PHY
registers whether the PHY is in fiber mode, so this boolean device tree
property can be used to describe it.
In fiber mode, auto-negotiation is disabled and the PHY can only work in
100base-fx (full and half duplex) modes.
- coma-mode-gpios: If present the given gpio will be deasserted when the
PHY is probed.
Some PHYs have a COMA mode input pin which puts the PHY into
isolate and power-down mode. On some boards this input is connected
to a GPIO of the SoC.
Supported on the LAN8814.
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