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* Designware APB timer

Required properties:
- compatible: "snps,dw-apb-timer-sp" or "snps,dw-apb-timer-osc"
- reg: physical base address of the controller and length of memory mapped
  region.
- interrupts: IRQ line for the timer.
- clock-frequency: The frequency in HZ of the timer.
- clock-freq: For backwards compatibility with picoxcell

Example:

		timer1: timer@ffc09000 {
				compatible = "snps,dw-apb-timer-sp";
				interrupts = <0 168 4>;
				clock-frequency = <200000000>;
				reg = <0xffc09000 0x1000>;
			};

		timer2: timer@ffd00000 {
				compatible = "snps,dw-apb-timer-osc";
				interrupts = <0 169 4>;
				clock-frequency = <200000000>;
				reg = <0xffd00000 0x1000>;
			};
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