Some platforms may require initial configuration of default parent clocks and clock frequencies. Such a configuration can be specified in a device tree node through assigned-clocks, assigned-clock-parents and assigned-clock-ratesproperties. The assigned-clock-parents property should contain a list of parent clocks in form of phandle and clock specifier pairs, the assigned-clock-parents property the list of assigned clock frequency values - corresponding to clocks listed in the assigned-clocks property.