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* Amlogic Virtual RTC (VRTC)
This is a Linux interface to an RTC managed by firmware, hence it's
virtual from a Linux perspective. The interface is 1 register where
an alarm time (in seconds) is to be written.
Required properties:
- compatible: should be "amlogic,meson-vrtc"
- reg: physical address for the alarm register
The alarm register is a simple scratch register shared between the
application processors (AP) and the secure co-processor (SCP.) When
the AP suspends, the SCP will use the value of this register to
program an always-on timer before going sleep. When the timer expires,
the SCP will wake up and will then wake the AP.
Example:
vrtc: rtc@0a8 {
compatible = "amlogic,meson-vrtc";
reg = <0x0 0x000a8 0x0 0x4>;
};
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