Config Device Tree to connect FPGA to SPI0

[viet1.lehung]

Hi!
I have custom a carrier board and an Intel Max 10 FPGA is connected on SPI0 and I dont know how to config in the device tree. I found the driver source “intel-m10-bmc.c”. Is its right?
Thank you so much

[KevinFFF]

Hi viet1.lehung,

Are you using the devkit or custom board for AGX Orin?
What’s your Jetpack version in use?

Have you asked your vendor for the porting guide of FPGA module?

[viet1.lehung]

Hi @KevinFFF , thank you for your response
I’m using the custom board with SOM jetson orin nano 8GB, Jetpack 6.0.
I can not find any guide from the vender

[viet1.lehung]

I’ going to config as the bellow, is it right?

spi@3210000{
			status = "okay";
			spi@0 {
				compatible = "microchip,mcp2515";
				reg = <0x0>;
				spi-max-frequency = <2000000>;
				interrupt-parent = <&gpio>;
                interrupts = <TEGRA234_MAIN_GPIO(Q, 5) IRQ_TYPE_LEVEL_LOW>;
                clocks = <&can_clock>;
                nvidia,enable-hw-based-cs;
				controller-data {
					nvidia,enable-hw-based-cs;
					nvidia,rx-clk-tap-delay = <0x10>;
					nvidia,tx-clk-tap-delay = <0x0>;
				};

				fpga@0 {
					compatible = "intel, intel-m10-bmc";
					spi-max-frequency = <20000000>;
					reg = <0>;
				}
			};

[KevinFFF]

@viet1.lehung

I can not find any guide from the vender

Please also contact your vendor for those resources. There should be some documentation for how to use them.

@viet1.lehung

I’ going to config as the bellow, is it right?

It would cause conflict for SPI0-CS0 since spi@0 and fpga@0 are both defining for SPI0-CS0.
Please just keep one of them.

[viet1.lehung]

@viet1.lehung

Intel Max 10 FPGA

Our FPGA is connected as in this image

May I remove the fpga node? Because the FPGA has been pre programmed by the vendor. We have enable the FPGA board management control in the kernel config.

[KevinFFF]

Yes, I think FPGA is redundant in above connections.

Please connect SPI-CAN on SPI interface.
Are you using something like MCP2515 or MCP2518 as SPI-CAN module?

And connect CAN transceiver on internal CAN interface (CAN0 and CAN1 are available on 40-pins expansion header).