5 - compatible : should be "altr,timer-1.0"
6 - reg : Specifies base physical address and size of the registers.
7 - interrupts : Should contain the timer interrupt number
8 - clock-frequency : The frequency of the clock that drives the counter, in Hz.
13 compatible = "altr,timer-1.0";
14 reg = <0x00400000 0x00000020>;
15 interrupt-parent = <&cpu>;
17 clock-frequency = <125000000>;