Nvidia Custom board dtbo loading

update-dtbo.sh

#!/bin/bash
# Path to the extlinux.conf file
CONFIG_FILE="/boot/extlinux/extlinux.conf"

dtsFile="$1"

dtboFile=/boot/$(basename $dtsFile .dts).dtbo
dtb=$(ls /boot/dtb/*.dtb)
dtbFile=$(realpath $dtb)

# Check if the config file exists
if [ ! -f "$CONFIG_FILE" ]; then
    echo "Error: $CONFIG_FILE not found."
    exit 1
fi

echo "Compiling $dtsFile to $dtboFile"
dtc -I dts -O dtb -o $dtboFile -@ $dtsFile

# FDT line to add or update
FDT_LINE="FDT $dtbFile"
OVERLAYS_LINE="OVERLAYS $dtboFile"

# Define a function to update or add a line to the config file
update_config_line() {
    local line_key="$1"
    local line_value="$2"
    local file_path="$3"

    if grep -q "^$line_key " "$file_path"; then
        echo "Line starting with '$line_key' found. Updating it..."
        # If line exists, replace it
        sed -i "s|^$line_key .*|$line_value|" "$file_path"
    else
        echo "Line starting with '$line_key' not found. Adding it..."
        # If line doesn't exist, append it
        echo "$line_value" >> "$file_path"
    fi
}
# Update or add FDT line
update_config_line "FDT" "$FDT_LINE" "$CONFIG_FILE"

# Update or add OVERLAYS line
update_config_line "OVERLAYS" "$OVERLAYS_LINE" "$CONFIG_FILE"