exi_select
exi_select(chan, dev, EXI_FREQ_8MHZ);
void exi_select(uint8_t, uint8_t, exi_freq_t);
exi_select(sc->sc_chan, sc->sc_device, EXI_FREQ_32MHZ);
exi_select(sc->sc_chan, sc->sc_device, WII_RTCSRAM_FREQ);
exi_select(sc->sc_chan, sc->sc_device, WII_RTCSRAM_FREQ);
exi_select(sc->sc_chan, sc->sc_device, WII_RTCSRAM_FREQ);