MCP2515 not work on Xavier-NX

Robotics & Edge Computing Jetson & Embedded Systems Jetson Xavier NX
1

Hi, I have a modules(mcp2515) that work good on respi3. I plug the module directly into the 40PIN of NX, NX using L4T newest source code. and then did the following work.
1.change the dts, remake and flash the dtb to NX

Blockquote
{
can_clock: can_clock {
compatible = “fixed-clock”;
#clock-cells = <0>;
clock-frequency = <20000000>;
clock-accuracy = <100>;
};
spi@3210000{ /* SPI1 in 40 pin conn */
spi@0 {
status = “okay”;
compatible = “microchip,mcp2515”;
reg = <0x0>;
spi-max-frequency = <10000000>;
nvidia,enable-hw-based-cs;
clocks = <&can_clock>;
interrupt-parent = <&tegra_main_gpio>;
interrupts = <TEGRA194_MAIN_GPIO(Z, 6) 0x1>;
};
spi@1 {
status = “okay”;
compatible = “microchip,mcp2515”;
reg = <0x1>;
spi-max-frequency = <10000000>;
nvidia,enable-hw-based-cs;
clocks = <&can_clock>;
interrupt-parent = <&tegra_main_gpio>;
interrupts = <TEGRA194_MAIN_GPIO(Z, 7) 0x1>;
};
};

2.sudo /opt/nvidia/jetson-io/jetson-io.py, enable the spi1.

3.dmesg show

Blockquote
dmesg log about spi and mcp2515:
[ 1.055675] of_fixed_clk: probe of can_clock failed with error -17
mcp251x spi0.0 can0: MCP2515 successfully initialized.
mcp251x spi0.1 can1: MCP2515 successfully initialized.
can: controller area network core (rev 20120528 abi 9)
can: raw protocol (rev 20120528)

4.start the can network device
sudo modprobe can-raw can-gw can-dev mttcan mcp251x

nvidia@xavier:~$ sudo ip link set can0 type can bitrate 1000000

nvidia@xavier:~$ sudo ip link set up can0

nvidia@xavier:~$ RTNETLINK answers: No such device

nvidia@xavier:~$ sudo ip link set can1 type can bitrate 1000000

nvidia@xavier:~$ sudo ip link set up can1

nvidia@xavier:~$ RTNETLINK answers: No such device

what’ s problem? Need you help

4

I solved the above problem. I used two mcp2515（use spi1 & spi3 on 40 pinout）. The generated can0/can1 can be used for loopback testing.

  1. Turn off the loopback mode
    2.CAN0 H ↔ CAN1 H, CAN0 L ↔ CAN1 L

use bitrate 250000 can0 and can1 can commucation，It won’t work beyond it.
MCP2515 oscillator is 8000000, clock config is

Blockquote
can_clock: can_clock {
compatible = “fixed-clock”;
#clock-cells = <0>;
clock-frequency = <8000000>;
clock-accuracy = <100>;
};

[ 1.055675] of_fixed_clk: probe of can_clock failed with error -17
Related to this problem?