SUN6I_LOSC_CTRL_REG
RTC_WRITE(sc, SUN6I_LOSC_CTRL_REG, reg);
RTC_WRITE(sc, SUN6I_LOSC_CTRL_REG, reg);
if (RTC_READ(sc, SUN6I_LOSC_CTRL_REG) & SUN6I_LOSC_CTRL_EXT_OSC)
uint32_t reg = RTC_READ(sc, SUN6I_LOSC_CTRL_REG);
RTC_WRITE(sc, SUN6I_LOSC_CTRL_REG, reg | SUN6I_LOSC_CTRL_KEY);
reg = RTC_READ(sc, SUN6I_LOSC_CTRL_REG);