1*c66ec88fSEmmanuel VadotBinding for simple memory mapped io fixed-rate clock sources. 2*c66ec88fSEmmanuel VadotThe driver reads a clock frequency value from a single 32-bit memory mapped 3*c66ec88fSEmmanuel VadotI/O register and registers it as a fixed rate clock. 4*c66ec88fSEmmanuel Vadot 5*c66ec88fSEmmanuel VadotIt was designed for test systems, like FPGA, not for complete, finished SoCs. 6*c66ec88fSEmmanuel Vadot 7*c66ec88fSEmmanuel VadotThis binding uses the common clock binding[1]. 8*c66ec88fSEmmanuel Vadot 9*c66ec88fSEmmanuel Vadot[1] Documentation/devicetree/bindings/clock/clock-bindings.txt 10*c66ec88fSEmmanuel Vadot 11*c66ec88fSEmmanuel VadotRequired properties: 12*c66ec88fSEmmanuel Vadot- compatible : shall be "fixed-mmio-clock". 13*c66ec88fSEmmanuel Vadot- #clock-cells : from common clock binding; shall be set to 0. 14*c66ec88fSEmmanuel Vadot- reg : Address and length of the clock value register set. 15*c66ec88fSEmmanuel Vadot 16*c66ec88fSEmmanuel VadotOptional properties: 17*c66ec88fSEmmanuel Vadot- clock-output-names : From common clock binding. 18*c66ec88fSEmmanuel Vadot 19*c66ec88fSEmmanuel VadotExample: 20*c66ec88fSEmmanuel Vadotsysclock: sysclock@fd020004 { 21*c66ec88fSEmmanuel Vadot #clock-cells = <0>; 22*c66ec88fSEmmanuel Vadot compatible = "fixed-mmio-clock"; 23*c66ec88fSEmmanuel Vadot reg = <0xfd020004 0x4>; 24*c66ec88fSEmmanuel Vadot}; 25