diff --git a/designs/device-tree-gpio-naming.md b/designs/device-tree-gpio-naming.md
index 3a88e91..763d3ab 100644
--- a/designs/device-tree-gpio-naming.md
+++ b/designs/device-tree-gpio-naming.md
@@ -61,8 +61,8 @@
 - led-rear-power
 - led-rear-id
 
-### Power
-Pattern: `power-*`
+### Power and Regulators
+Pattern: `power-*`, `regulator-*`
 
 Defined:
 #### power-button
@@ -73,6 +73,13 @@
 #### power-chassis-good
 Indicates the power good state of the chassis.
 
+#### regulator-standby-faulted
+This GPIO value represents the status of standby power regulator fault detection
+logic. This GPIO is an input only. The status will reflect a regulator 
+non-faulted condition after AC power cycle when no standby power regulator fault
+condition is present. The status will reflect a standby regulator power faulted
+condition when an unexpected drop in standby power is detected.
+
 ### Buttons
 Pattern: `*-button`