AU1000_SYS_FREQCTRL0
a->reg = AU1000_SYS_FREQCTRL0;
sleep_sys_clocks[0] = alchemy_rdsys(AU1000_SYS_FREQCTRL0);
alchemy_wrsys(sleep_sys_clocks[0], AU1000_SYS_FREQCTRL0);