xref: /freebsd/sys/contrib/device-tree/Bindings/clock/tango4-clock.txt (revision c66ec88fed842fbaad62c30d510644ceb7bd2d71) 
1*c66ec88fSEmmanuel Vadot* Sigma Designs Tango4 Clock Generator
2*c66ec88fSEmmanuel Vadot
3*c66ec88fSEmmanuel VadotThe Tango4 clock generator outputs cpu_clk and sys_clk (the latter is used
4*c66ec88fSEmmanuel Vadotfor RAM and various peripheral devices). The clock binding described here
5*c66ec88fSEmmanuel Vadotis applicable to all Tango4 SoCs.
6*c66ec88fSEmmanuel Vadot
7*c66ec88fSEmmanuel VadotRequired Properties:
8*c66ec88fSEmmanuel Vadot
9*c66ec88fSEmmanuel Vadot- compatible: should be "sigma,tango4-clkgen".
10*c66ec88fSEmmanuel Vadot- reg: physical base address of the device and length of memory mapped region.
11*c66ec88fSEmmanuel Vadot- clocks: phandle of the input clock (crystal oscillator).
12*c66ec88fSEmmanuel Vadot- clock-output-names: should be "cpuclk" and "sysclk".
13*c66ec88fSEmmanuel Vadot- #clock-cells: should be set to 1.
14*c66ec88fSEmmanuel Vadot
15*c66ec88fSEmmanuel VadotExample:
16*c66ec88fSEmmanuel Vadot
17*c66ec88fSEmmanuel Vadot	clkgen: clkgen@10000 {
18*c66ec88fSEmmanuel Vadot		compatible = "sigma,tango4-clkgen";
19*c66ec88fSEmmanuel Vadot		reg = <0x10000 0x40>;
20*c66ec88fSEmmanuel Vadot		clocks = <&xtal>;
21*c66ec88fSEmmanuel Vadot		clock-output-names = "cpuclk", "sysclk";
22*c66ec88fSEmmanuel Vadot		#clock-cells = <1>;
23*c66ec88fSEmmanuel Vadot	};
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