Kernel-3.10.0-957.el7_rtc-opal

IBM OPAL real-time clock

Required properties:

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

Optional properties:

• has-tpo: Decides if the wakeup is supported or not.

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