How to configure spi0 device-tree for mcp2515

[848145724]

Dear all:
1: With JetPack4.6_R32.6.1,Jetson Xavier NX with custom board, we connect mcp2515 to SOM,

2: change tegra_defconfig

1. CONFIG_CAN_MCP251X=y
2. CONFIG_CAN=y

3: configure device-tree in tegra194-p3668-common.dtsi

        can_clock: can_clock {
                 compatible = "fixed-clock";
                 #clock-cells = <0>;
                 clock-frequency = <8000000>;
                 clock-accuracy = <100>;
         };
 
         spi@3210000{ /* SPI1 in 40 pin conn */
                 status = "okay";
                 spi@0 { /* chip select 0 */
                         compatible = "microchip,mcp2515";
                         reg = <0x0>;
                         spi-max-frequency = <10000000>;
                         interrupt-parent = <&tegra_main_gpio>;
                         interrupts = <TEGRA194_MAIN_GPIO(Z, 6) 0x0>;
                         clocks = <&can_clock>;
                         controller-data {
                                 nvidia,enable-hw-based-cs;
                                 nvidia,rx-clk-tap-delay = <0x10>;
                                 nvidia,tx-clk-tap-delay = <0x0>;
                         };
                 };
                 spi@1 { /* chip select 1 */
                         compatible = "tegra-spidev";
                         reg = <0x1>;
                         spi-max-frequency = <50000000>;
                         controller-data {
                                 nvidia,enable-hw-based-cs;
                                 nvidia,rx-clk-tap-delay = <0x10>;
                                 nvidia,tx-clk-tap-delay = <0x0>;
                         };
                 };
         };

4: dmesg.log：

[    2.823403] mcp251x spi0.0: MCP251x didn't enter in conf mode after reset
[    2.823654] mcp251x spi0.0: Probe failed, err=16
[    2.823836] mcp251x: probe of spi0.0 failed with error -16
[    2.823942] mcp251x: probe of spi0.1 failed with error -2

5: 4 pin (spi0_sck, spi0_MISO, spio_MOSI. spi0_CS0 voltage is normal)

I guess, incorrect configuration of device-tree may is the key. So could you have some suggestions?
Thank you very much！

[JerryChang]

hello 848145724,

could you please also refer to Topic 177675 for the SPI’s pin configuration.

[ShaneCCC]

You can also run the jetson-io to configure the SPI PINs.

Thanks

[848145724]

Related registers have change, but problem is not resolved.

[ShaneCCC]

Have reference to below topic.

How to enable MCP2515 on Xavier-NX

Hi, Our carrier board with Xavier-NX has one canbus,I want to use mcp2515,which communicate to canbus. BSP:JetPack4.4 R32.4.3 Module: Xavier-NX with emmc mcp2515 Xavier-NX INT 112 (SPI1_CS1) SCK 106 (SPI1_SCK) SI 104 ((SPI1_MOSI) SO 108 SPI1_MISO) CS 110 (SPI1_CS0) GND GND VCC VDD_3V3 / { can_clock: can_clock { compatible = “fixed-clock”; #clock-cells = <0>; clock-frequency = <20000000>; clock-accuracy = <100>; }; spi@3230000{ /* SPI3 in 40 pin conn */ spi@0 { …

[848145724]

@848145724

spi-max-frequency = <10000000>;

change 10000000 to 5000000, it works