diff --git a/meta-witherspoon/recipes-phosphor/ipmi/phosphor-ipmi-config.bbappend b/meta-witherspoon/recipes-phosphor/ipmi/phosphor-ipmi-config.bbappend
new file mode 100644
index 0000000..8445c83
--- /dev/null
+++ b/meta-witherspoon/recipes-phosphor/ipmi/phosphor-ipmi-config.bbappend
@@ -0,0 +1,44 @@
+FILESEXTRAPATHS_prepend_witherspoon := "${THISDIR}/${PN}:"
+
+# Calculate the auxiliary firmware revision to be updated in the dev_id.json
+# file. It is calculated from the VERSION_ID field which currently has two
+# formats. The revision field is 4 bytes, the first two bytes represent the
+# count of commits from the tagging and next two bytes represent the version.
+# Both fields are represented in BCD encoded format, so 9999 is the maximum
+# value both fields can take. With the format "v2.1-216-ga78ace8", Petitboot
+# would display the firmware revision as "Firmware version: 2.01.02160000",
+# "0216" is count and the revision is "0000". With the format
+# "ibm-v2.0-10-r41-0-gd0c319e" Petitboot would display the firmware revision
+# as "Firmware version: 2.00.00100041", "0010" is count and the revision
+# is "0041".
+inherit image_version
+
+unset do_patch[noexec]
+do_patch[depends] = "os-release:do_populate_sysroot"
+
+python do_patch() {
+    import json
+    import re
+    from shutil import copyfile
+    version_id = do_get_version(d)
+
+    # count from the commit version
+    count = re.findall("-(\d{1,4})-", version_id)
+
+    release = re.findall("-r(\d{1,4})", version_id)
+    if release:
+        auxVer = count[0] + "{0:0>4}".format(release[0])
+    else:
+        auxVer = count[0] + "0000"
+
+    workdir = d.getVar('WORKDIR', True)
+    file = os.path.join(workdir, 'dev_id.json')
+
+    # Update dev_id.json with the auxiliary firmware revision
+    with open(file, "r+") as jsonFile:
+        data = json.load(jsonFile)
+        jsonFile.seek(0)
+        jsonFile.truncate()
+        data["aux"] = int(auxVer, 16)
+        json.dump(data, jsonFile)
+}