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1IBM OPAL real-time clock2------------------------3 4Required properties:5- compatible: Should be "ibm,opal-rtc"6 7Optional properties:8- wakeup-source: Decides if the wakeup is supported or not9 (Legacy property supported: "has-tpo")10 11Example:12 rtc {13 compatible = "ibm,opal-rtc";14 wakeup-source;15 phandle = <0x10000029>;16 linux,phandle = <0x10000029>;17 };18