I am triying to port newracom driver (nrc7292) on nvidia jetson nano developer kit

Autonomous Machines Jetson & Embedded Systems Jetson Nano
1

I am trying to port newracom driver (nrc7292) on nvidia jetson nano developer kit. I am able to build the NRC7292 host driver on jetson nano but when trying to load the Newracom NRC7292 kernel module. I get following errors!
when checking with dmesg command

Screenshot from 2021-08-03 12-19-12|690x80

can anyone help me with the installation of newracom driver on jetson nano.

note: 1. the driver works on the raspberry pi
2. I am using the silex SX-newah 802.11ah module.
3. Jetson nano in headless mode

The resource available :

https://github.com/newracom/nrc7292_sw_pkg

https://github.com/wzab/nrc7292-buildroot/tree/rpi3-5.8

3

Since you already have the code, why not just add some print in the probe function and see which one gets errro?

4

I checked that and the problem is caused by

[ 87.274858] spi-tegra114 7000d400.spi: chipselect 0 already in use

I tried to disable the spi driver using following method :

- Kernel Module Blacklisting
	$ echo "blacklist spidev" >> /etc/modprobe.d/blacklist.conf

- Module Renaming
	$ cd  /lib/modules/4.9.201-tegra/kernel/drivers/spi
	$ sudo mv spidev.ko spidev.ko~

- “rmmod” command
	$ sudo rmmod spidev

and tried again to build and load the driver but the same error is there again regarding chipselect 0 already in use

6

Could you remove below from the device tree in spi@7000d400 {}

		spi@0 {
			compatible = "spidev";
			reg = <0x0>;
			spi-max-frequency = <0x1f78a40>;

			controller-data {
				nvidia,enable-hw-based-cs;
				nvidia,rx-clk-tap-delay = <0x7>;
			};
		};

		spi@1 {
			compatible = "spidev";
			reg = <0x1>;
			spi-max-frequency = <0x1f78a40>;

			controller-data {
				nvidia,enable-hw-based-cs;
				nvidia,rx-clk-tap-delay = <0x7>;
			};
		};
7

can you provide the path where this file is located

1 Like
8

Check it here.

…/hardware/nvidia/platform/t210/porg/kernel-dts/tegra210-porg-p3448-common.dtsi

9

gtnano2@gtnano2:~$ cat /proc/device-tree/nvidia,dtsfilename
/dvs/git/dirty/git-master_linux/kernel/kernel-4.9/arch/arm64/boot/dts/…/…/…/…/…/…/hardware/nvidia/platform/t210/porg/kernel-dts/tegra210-p3448-0000-p3449-0000-b00.dts

I can see this but can’t access the folder path " …/hardware/nvidia/platform/t210/porg/kernel-dts/tegra210-porg-p3448-common.dtsi " to edit the file. is there anything else I have to do before this or how can I access the dts file to edit it

10

You need to download the source code, download it to a ubuntu x86 host and follow the document to build it.

Not searching it on your jetson.

11

this ??

12

https://developer.nvidia.com/embedded/linux-tegra

Please check the software version you are using.

13

Also can check this document to build the kernel Image and DTB.

https://docs.nvidia.com/jetson/l4t/index.html#page/Tegra%20Linux%20Driver%20Package%20Development%20Guide/kernel_custom.html

14

hello

I have used this instruction to build the kernel

https://developer.ridgerun.com/wiki/index.php?title=Jetson_Nano/Development/Building_the_Kernel_from_Source

so when I am trying to Copy kernel, device tree and modules into jetpack from above link steps

cd ${JETPACK_4_3_P3448}
# Copy kernel generated
cp $JETSON_NANO_KERNEL_SOURCE/build/arch/arm64/boot/Image kernel/
# Copy device tree generated
cp $JETSON_NANO_KERNEL_SOURCE/build/arch/arm64/boot/dts/${DTB} kernel/dtb/

I am getting the following error

amit@amit-HP-15-Notebook-PC:~$ cd ${JETPACK_4_3_P3448}
bash: cd: /home/amit/nvidia/nvidia_sdk//JetPack_4.3_Linux_P3448/Linux_for_Tegra: No such file or directory
amit@amit-HP-15-Notebook-PC:~$ ^C
amit@amit-HP-15-Notebook-PC:~$ cp $JETSON_NANO_KERNEL_SOURCE/build/arch/arm64/boot/Image kernel/
cp: cannot stat '/build/arch/arm64/boot/Image': No such file or directory
amit@amit-HP-15-Notebook-PC:~$ cp $JETSON_NANO_KERNEL_SOURCE/build/arch/arm64/boot/dts/${DTB} kernel/dtb/
cp: cannot stat '/build/arch/arm64/boot/dts/tegra210-p3448-0000-p3449-0000-a02.dtb': No such file or directory

The jetson nano is in recovery mode:

amit@amit-HP-15-Notebook-PC:~$ lsusb
Bus 001 Device 004: ID 05c8:036e Cheng Uei Precision Industry Co., Ltd (Foxlink) Webcam
Bus 001 Device 003: ID 0bda:b001 Realtek Semiconductor Corp. 
Bus 001 Device 002: ID 8087:8000 Intel Corp. 
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 002: ID 25a7:fa67  
Bus 002 Device 004: ID 0955:7f21 NVidia Corp. 
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root

can you point what is the issue?

15

Why not just check the error log first?

16

sorry my bad error got solved

17

11

18

note : " The kernel source version must match the version of firmware flashed on the Jetson. "