HW_AUDIOOUT_ANACLKCTRL_CLKGATE
AO_WR(sc, HW_AUDIOOUT_ANACLKCTRL_CLR, HW_AUDIOOUT_ANACLKCTRL_CLKGATE);
while ((AO_RD(sc, HW_AUDIOOUT_ANACLKCTRL) & HW_AUDIOOUT_ANACLKCTRL_CLKGATE))