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Alexander Potashev authored
Core/system clock rate: 100 MHz Peripheral clock rate: 50 MHz FlexBus clock rate: 50 MHz Flash clock rate: 25 MHz The PLL takes the 50 MHz on-board external clock from the EXTAL pin and feeds the MCGOUTCLK with a 100 MHz clock. On the Kinetis MCU, we have to sequentally switch between 3 clocking modes until we can enter the desired PEE mode (PLL Engaged External mode). The `KINETIS_MCG_C2_EREFS_MSK` and `KINETIS_MCG_C2_HGO_MSK` bits should be cleared, otherwise the Ethernet module of the MCU cannot send nor receive packets. Testing: `udelay(1000)` works correctly (tested by blinking the green LED.)
5c122449