board: photonicat2: add auto-loading for common USB modem drivers add custom kernel configuration for PHOTONICAT_PM driver

Author: HackingGate

config/boards/photonicat2.csc

@@ -12,3 +12,44 @@ BOOT_SCENARIO="spl-blobs"
 IMAGE_PARTITION_TABLE="gpt"
 ENABLE_EXTENSIONS="radxa-aic8800"
 AIC8800_TYPE="usb"
+
+# Ensure common USB modem drivers are auto-loaded in the built image
+function post_family_tweaks__photonicat2() {
+	display_alert "$BOARD" "Installing Photonicat2 modem module list" "info"
+	mkdir -p "${destination}"/etc/modprobe.d
+	mkdir -p "${destination}"/etc/modules-load.d
+
+	# Modules that are commonly required for USB cellular modems and WWAN devices.
+	# Adjust this list if you know your modem needs a different driver.
+	cat > "${destination}"/etc/modules-load.d/photonicat2-modems.conf <<- EOT
+	cdc-wdm
+	qmi_wwan
+	cdc_mbim
+	cdc_ncm
+	option
+	usbserial
+	EOT
+
+	return 0
+}
+
+# Set PHOTONICAT_PM driver to module for Photonicat2 kernel builds
+# This hook runs during kernel config (see kernel-config.sh call_extensions_kernel_config)
+function custom_kernel_config__photonicat2() {
+	kernel_config_modifying_hashes+=("photonicat2-photonicat-pm")
+	if [[ -f .config ]]; then
+		# Use kernel's scripts/config if available to set tristate to 'm'
+		if [[ -x scripts/config ]]; then
+			# set PHOTONICAT_PM to built-in (y)
+			./scripts/config --set-val PHOTONICAT_PM y || true
+		else
+			# fallback: sed replace - best effort (olddefconfig will validate later)
+			sed -i 's/^CONFIG_PHOTONICAT_PM=.*/CONFIG_PHOTONICAT_PM=y/' .config || true
+			# ensure entry exists
+			if ! grep -q '^CONFIG_PHOTONICAT_PM=' .config; then
+				echo 'CONFIG_PHOTONICAT_PM=y' >> .config
+			fi
+		fi
+	fi
+	return 0
+}