Kernel-4.18.0-80.el8_rtc-opal

IBM OPAL real-time clock

Required properties:

• compatible: Should be “ibm,opal-rtc”

Optional properties:

• wakeup-source: Decides if the wakeup is supported or not

     (Legacy property supported: "has-tpo")
  

Example:
rtc {
compatible = “ibm,opal-rtc”;
wakeup-source;
phandle = <0x10000029>;
linux,phandle = <0x10000029>;
};