I have a custom IMXDL board with a KSZ8863 switch.
According to MDIO the switch is fine, but RMII is dead silent.
Both IMXDL and PHY are clocked by external clock.
I would like to confirm that it is indeed possible to use RGMII_TX_CTL to clock RMII from an external clock?
The HW dev. guide (IMX6DQ6SDLHDG) is a bit light on detail regarding RGMII_TX_CTL, as GPIO_16 is the recommended external clock sink.
If RGMII_TX_CTL is a valid clock sink for RMII, it's a SW issue and I'd much appreciate any sample code.
I'm trying to get ethernet running on uboot, for a start.