Build a Kernel Image without built-in Serial_8250 settings

Using JetPack 5.1.1 as an example.

Prerequisites

1. Create a Pure JetPack 5.1.1 Environment

2. Building Pinmux + Device Tree + Kernel for NRU-220S

3. Download the latest tarball from NRU NAS, and make sure the following file is already in your L4T folder

   1. build_kernel.sh

   2. build/.config

Change the Config (On the Host)

L4T=/xxx/xxxxxxx/Linux_for_Tegra
cd $L4T
sudo vim build/.config

CONFIG_SERIAL_8250=n
...
CONFIG_SND_SERIAL_U16550=n

Build Kernel (On the Host)

L4T=/xxx/xxxxxxx/Linux_for_Tegra
cd $L4T
./build_kernel.sh

# The compiled Kernel Image will be located in the following path
# build/arch/arm64/boot/Image

Update the Kenel Image (On the Jetson Side)

sudo cp ~/Desktop/Image /boot/Image
sudo reboot

# Check if the kernel Image updated successfully

gzip -d < /proc/config.gz | egrep -i 8250
# CONFIG_SERIAL_8250 is not set
# Non-8250 serial port support
# CONFIG_MEDIA_TUNER_TDA18250 is not set

gzip -d < /proc/config.gz | egrep -i 16550
# CONFIG_SND_SERIAL_U16550 is not set