SI5351_MULTISYNTH_DIVBY4_FREQ
if (rate > SI5351_MULTISYNTH_DIVBY4_FREQ)
rate = SI5351_MULTISYNTH_DIVBY4_FREQ;
if (rate > SI5351_MULTISYNTH_DIVBY4_FREQ)
#define SI5351_MULTISYNTH67_MAX_FREQ SI5351_MULTISYNTH_DIVBY4_FREQ