foo.dts

/ {
    amba {
        slcr@f8000000 {
            clkc@100 {
                clocks = <0x4 0x0>;
                clock-names = "gem1_emio_clk";
            };
        };
        
        gem1_emio_mux {
            compatible = "fixed-clock";
            #clock-cells = <0x1>;
            clock-frequency = <25000000>;
            clock-output-names = "gem1_emio_mux";
            linux,phandle = <0x4>;
            phandle = <0x4>;
        };
        
    };
};