can0 is missing

[Sergei G]

I have the following TDS configuration and I expect to see /dev/can0, but it is not there.  

dmesg reports 

    PHY 4a101000.mdio:00 not found.

when I "dmesg | grep can" all I see is last dmesg line:

    CAN device driver interface

uname -a reports:

    Linux beaglebone 4.4.30-ti-r64 #1 SMP Fri Nov 4 2016 armv71 GNU/Linux

I have never worked with canbus, so I am not sure if it is my DTS file incorrect or I am missing something at Linux level.  

/dts-v1/;
/plugin/;


/ {
 compatible = "ti,beaglebone", "ti,beaglebone-black";


 /* identification */
 part-number = "BB-MIKROBUS-01";
 version = "00A1";


 /* state the resources this cape uses */
 exclusive-use =
 /* the pin header uses */
 "P8.10", /* gpio2_4  */
 "P8.11", /* gpio1_13 */
 "P8.12", /* gpio1_12 */
 "P8.13", /* ehrpwm2B */
 "P8.14", /* gpio0_26 */
 "P8.15", /* gpio1_15 */
 "P8.16", /* gpio1_14 */
 "P8.17", /* gpio0_27 */
 "P8.18", /* gpio2_1 */
 "P8.19", /* ehrpwm2A */
 "P8.26", /* gpio1_29 */
 "P9.11", /* uart4_rxd_mux2 */
 "P9.12", /* gpio1_28 */
 "P9.13", /* uart4_txd_mux2 */
 "P9.14", /* ehrpwm1A_mux1 */
 "P9.15", /* gpio1_16 */
 "P9.16", /* ehrpwm1B_mux1 */
 "P9.17", /* spi0_cs0  */
 "P9.18", /* spi0_d1 */
 "P9.19", /* i2c2_scl */
 "P9.20", /* i2c2_sda */
 "P9.21", /* uart2_txd or spi0_d0*/
 "P9.22", /* uart2_rxd  or spi0_sclk*/
 "P9.23", /* gpio1_17 */
 "P9.24", /* uart1_txd */
 "P9.26", /* uart1_rxd */
 "P9.28", /* spi1_cs0 */
 "P9.29", /* spi1_d0 */
 "P9.30", /* spi1_d1 */
 "P9.31", /* spi1_sclk */
        "P9.33", /* AIN4 */
        "P9.35", /* AIN6 */
        "P9.36", /* AIN5 */
 "P9.37", /* AIN2 */
 "P9.38", /* AIN3 */
 "P9.39", /* AIN0 */
 "P9.40", /* AIN1 */
 "P9.41", /* gpio0_20 */
 "P9.42", /* spi1_cs1 */


 /* the hardware ip uses */
 "gpio2_4",
 "gpio1_13",
 "gpio1_12",
 "ehrpwm2B",
 "gpio0_26",
 "gpio1_15",
 "gpio1_14",
 "gpio0_27",
 "gpio2_1",
 "ehrpwm2A",
 "gpio1_29",
 "uart4",
 "ehrpwm1A",
 "gpio1_16",
 "ehrpwm1B",
 "i2c2",
 "spi0",
 "gpio1_17",
 "uart1",
 "spi1",
 "gpio0_20",
 "tscadc";








 fragment@0 {
 target = <&am33xx_pinmux>;


 __overlay__ {
 
 /* avoid stupid warning */
 #address-cells = <1>;
                #size-cells = <1>;


 bb_spi1_pins: pinmux_bb_spi1_pins {
 pinctrl-single,pins = <
 0x190 0x33 /* mcasp0_aclkx.spi1_sclk, INPUT_PULLUP | MODE3 */
 0x194 0x33 /* mcasp0_fsx.spi1_d0, INPUT_PULLUP | MODE3 */
 0x198 0x13 /* mcasp0_axr0.spi1_d1, OUTPUT_PULLUP | MODE3 */
 0x19c 0x13 /* mcasp0_ahclkr.spi1_cs0, OUTPUT_PULLUP | MODE3 */
 0x164 0x12 /* eCAP0_in_PWM0_out.spi1_cs1 OUTPUT_PULLUP | MODE2 */
 0x098 0x17 /* gpio2_4, OUTPUT_PULLUP | MODE7  */
 >;
 };


 bb_spi0_pins: pinmux_bb_spi0_pins {
 pinctrl-single,pins = <
 0x150 0x30  /* spi0_sclk, INPUT_PULLUP | MODE0 */
 0x154 0x30  /* spi0_d0, INPUT_PULLUP | MODE0 */
 0x158 0x10  /* spi0_d1, OUTPUT_PULLUP | MODE0 */
 0x15c 0x10  /* spi0_cs0, OUTPUT_PULLUP | MODE0 */
 
 >;
 };


                        mcp251x_clk24m: mcp251x_can_clock {
                                compatible = "fixed-clock";
                                #clock-cells = <0>;
                                clock-frequency = <10000000>;
                        };


 };
 };


 fragment@1 {
 target = <&spi1>; /* spi1 is numbered correctly */
 __overlay__ {
 status = "okay";
 pinctrl-names = "default";
 pinctrl-0 = <&bb_spi1_pins>;


 #address-cells = <1>;
 #size-cells = <0>;
 cs-gpios = <0>, <0>, <&gpio2 4 0>;
 num-cs = <3>;


 /* add any spi devices connected here */
 /* note that you can do direct SPI via spidev now */


    can0: can@1 {
 compatible = "microchip,mcp2515";
 reg = <0>;
 clocks = <&mcp251x_clk24m>;
                spi-max-frequency = <20000000>;
 interrupt-parent = <&gpio1>;
 interrupts = <16 0x2>;
    };


            spi1_1{
                #address-cells = <1>;
                #size-cells = <0>;
                compatible = "spidev";
                reg = <1>;
                spi-max-frequency = <20000000>;
                spi-cpol;
                spi-cpha;
            };
            spi1_2{
                #address-cells = <1>;
                #size-cells = <0>;
                compatible = "spidev";
                reg = <2>;
                spi-max-frequency = <20000000>;
                spi-cpol;
                spi-cpha;
            };




 };
 };


 fragment@11 {
 target = <&spi0>; /* spi0 is spi2 on mikrobus */
 __overlay__ {
 status = "okay";
 pinctrl-names = "default";
 pinctrl-0 = <&bb_spi0_pins>;


 #address-cells = <1>;
 #size-cells = <0>;


 /* add any spi devices connected here */
 /* note that you can do direct SPI via spidev now */
            spi0_0{
                #address-cells = <1>;
                #size-cells = <0>;
                compatible = "spidev";
                reg = <0>;
                spi-max-frequency = <20000000>;
 spi-cpol;
                spi-cpha;          
            };
 };
 };
};