SUN6I_LOSC_CTRL_EXT_OSC
if (val & SUN6I_LOSC_CTRL_EXT_OSC)
return readl(rtc->base + SUN6I_LOSC_CTRL) & SUN6I_LOSC_CTRL_EXT_OSC;
val &= ~SUN6I_LOSC_CTRL_EXT_OSC;
val |= index ? SUN6I_LOSC_CTRL_EXT_OSC : 0;
reg |= SUN6I_LOSC_CTRL_EXT_OSC;