some industry customer to use i.MX8MM will use RMII to link the 100Mhz ethernet phy and wish to use our i.mx8mm output 50Mhz reference clock to external phy to save a crystal, this doc and patch explain how to support it.
SW: Linux BSP 5.10.17.
HW: i.MX8MM LPDDR/DDR EVK board.
中文版本为一个完整的如何支持一个100Mhz以太网PHY
