HW_TIMROT_ROTCTRL_CLKGATE
TIMROT_WRITE(sc, HW_TIMROT_ROTCTRL_CLR, HW_TIMROT_ROTCTRL_CLKGATE);
while (!(TIMROT_READ(sc, HW_TIMROT_ROTCTRL) & HW_TIMROT_ROTCTRL_CLKGATE))
TIMROT_WRITE(sc, HW_TIMROT_ROTCTRL_CLR, HW_TIMROT_ROTCTRL_CLKGATE);
while (TIMROT_READ(sc, HW_TIMROT_ROTCTRL) & HW_TIMROT_ROTCTRL_CLKGATE)