I'm trying to get mcp25xxfd device to work on OpenWRT. Currently I'm using ramips platform (Linux Kernel version is 4.14.180). I have the following configuration in one of my DTS files:       

osc: oscillator {
                compatible = "fixed-clock";
                clock-frequency  = <40000000>;
        };

        spidev1 {
            compatible = "spi-gpio";
            gpio-sck  = <&gpio0 25 GPIO_ACTIVE_HIGH>;
            gpio-mosi = <&gpio0 26 GPIO_ACTIVE_HIGH>;
            gpio-miso = <&gpio0 27 GPIO_ACTIVE_HIGH>;
            cs-gpios  = <&gpio0 28 GPIO_ACTIVE_HIGH>;
            num-chipselects = <1>;


            can0: mcp2517fd@0 {
                    compatible = "microchip,mcp2517fd";
                    status = "okay";
                    clock-names = "can0_osc";
                    clocks = <&osc>;
                    reg = <0>;
                    spi-max-frequency = <16000000>;
                    interrupt-parent = <&gpio0>;
                    interrupts = <11>;
            };
        };

However, when I try to probe it using insmod utility, I get error:

    [   30.522030] mcp25xxfd: probe of spi1.0 failed with error -2

If I comment out the following section

        compatible = "spi-gpio";
        gpio-sck  = <&gpio0 25 GPIO_ACTIVE_HIGH>;
        gpio-mosi = <&gpio0 26 GPIO_ACTIVE_HIGH>;
        gpio-miso = <&gpio0 27 GPIO_ACTIVE_HIGH>;
        cs-gpios  = <&gpio0 28 GPIO_ACTIVE_HIGH>;
        num-chipselects = <1>;

and try to create SPI device manually

    insmod spi-gpio-custom bus0=1,25,26,27,0,1000000,28

and then again try to load mcp25xxfd, nothing happens:

    root@Sensors:/# insmod mcp25xxfd
    root@Sensors:/#

I can see spidev1.0 is on /dev, but no can0.
Can anyone help with this problem?

Sorry - this isnt a forum for supporting OpenWRT (they got an own forum) at 

https://forum.openwrt.org/c/devel/8

https://forum.openwrt.org/c/hardware-questions-and-recommendations/13

 

but you can take a look at: