grblhal-glowforge: recipe with boot autostart

gitsm-pinned build of the controller with a sysvinit script (defaults 92, after forgectrl), installed in both images. Reboot-verified on the bench: controller and forgectrl come up unattended and Grbl answers on TCP:23.

meta-forgefirm/recipes-forgefirm/grblhal-glowforge/grblhal-glowforge.bb

@@ -0,0 +1,30 @@
+DESCRIPTION = "grblHAL motion controller for the Glowforge factory board"
+HOMEPAGE = "https://github.com/ScottW514/grblHAL-glowforge"
+
+LICENSE = "GPL-3.0-or-later"
+LIC_FILES_CHKSUM = "file://COPYING;md5=3237e48bcef3455c7bea5c0ce16206f6"
+
+PV = "0.1.0"
+
+# gitsm: the grblHAL core rides as a submodule (ScottW514/core, branch
+# forgefirm, carrying the settings-write crash fix PR'd upstream).
+SRC_URI = "gitsm://github.com/ScottW514/grblHAL-glowforge.git;protocol=https;branch=main"
+# Pinned; bump deliberately after pushing grblHAL-glowforge changes.
+SRCREV = "c421f20281bb399bdbb65a45e355b3d4ca912d1d"
+
+SRC_URI += "file://grblhal.init"
+
+S = "${WORKDIR}/git"
+
+inherit cmake update-rc.d
+
+INITSCRIPT_NAME = "grblhal"
+INITSCRIPT_PARAMS = "defaults 92"
+
+do_install:append() {
+    install -d ${D}${sysconfdir}/init.d
+    install -m 0755 ${WORKDIR}/grblhal.init ${D}${sysconfdir}/init.d/grblhal
+}
+
+# The controller streams into /dev/glowforge (glowforge.ko) at runtime.
+RRECOMMENDS:${PN} = "kernel-module-glowforge"