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Choosing GPIO Speed Setting

Question asked by Uwe Bonnes on Jun 19, 2015
Latest reply on Jun 19, 2015 by gonzalez.laurent

what is a sensible relation between the GPIO speed setting and peripheral device speed? E.g. OSPEED = 00 on a >2.7 Volt STM32F42x with 10 pF load has a value of 8 MHz max. Is that good for a SPI clock rate of 8 MHz? Or should OSPEED be  substantial higher than the peripheral clock speed?
What strategy  to use?