From 40fd877db287acf65a985f5f18d8b7e28ebbeb08 Mon Sep 17 00:00:00 2001
From: Hugo Villeneuve <hugo@hugovil.com>
Date: Tue, 9 Sep 2025 14:48:32 -0400
Subject: [PATCH] swupdate: add script to provide runtime hardware revision

Signed-off-by: Hugo Villeneuve <hugo@hugovil.com>
---
 .../swupdate/swupdate/97-hwrevision-hardcoded.sh.in  | 12 ++++++++++++
 recipes-support/swupdate/swupdate_%.bbappend         | 12 ++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 recipes-support/swupdate/swupdate/97-hwrevision-hardcoded.sh.in
 create mode 100644 recipes-support/swupdate/swupdate_%.bbappend

diff --git a/recipes-support/swupdate/swupdate/97-hwrevision-hardcoded.sh.in b/recipes-support/swupdate/swupdate/97-hwrevision-hardcoded.sh.in
new file mode 100644
index 0000000..44bdf5d
--- /dev/null
+++ b/recipes-support/swupdate/swupdate/97-hwrevision-hardcoded.sh.in
@@ -0,0 +1,12 @@
+#!/bin/sh
+
+# TODO: the revision should be read at bootup from an EEPROM or other means.
+# For now, it is simply hardcoded.
+HWREV="revA"
+
+DESTDIR="/var/run/swupdate"
+DESTFILE="${DESTDIR}/hwrevision"
+
+mkdir -p ${DESTDIR}
+
+echo "@MACHINE@ ${HWREV}" > ${DESTFILE}
diff --git a/recipes-support/swupdate/swupdate_%.bbappend b/recipes-support/swupdate/swupdate_%.bbappend
new file mode 100644
index 0000000..a475262
--- /dev/null
+++ b/recipes-support/swupdate/swupdate_%.bbappend
@@ -0,0 +1,12 @@
+FILESEXTRAPATHS:prepend:hvmpd := "${THISDIR}/${PN}:"
+
+SRC_URI:append:hvmpd = " \
+    file://97-hwrevision-hardcoded.sh.in \
+"
+
+do_install:append:hvmpd() {
+    sed -e s/@MACHINE@/${MACHINE}/ \
+        ${WORKDIR}/97-hwrevision-hardcoded.sh.in > ${WORKDIR}/97-hwrevision-hardcoded.sh
+    install -d ${D}${libdir}/swupdate/conf.d/
+    install -m 644 ${WORKDIR}/97-hwrevision-hardcoded.sh ${D}${libdir}/swupdate/conf.d/
+}
-- 
2.20.1