Add under-voltage interrupt support. This can be used with simple
regulators having no other way to communicate an under-voltage event
except as by toggling some GPIO line.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
---
 .../devicetree/bindings/regulator/fixed-regulator.yaml       | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/regulator/fixed-regulator.yaml b/Documentation/devicetree/bindings/regulator/fixed-regulator.yaml
index ac0281b1cceb..ce7751b9129c 100644
--- a/Documentation/devicetree/bindings/regulator/fixed-regulator.yaml
+++ b/Documentation/devicetree/bindings/regulator/fixed-regulator.yaml
@@ -100,6 +100,11 @@ properties:
   vin-supply:
     description: Input supply phandle.
 
+  interrupts:
+    maxItems: 1
+    description:
+      Interrupt signaling a critical under-voltage event.
+
 required:
   - compatible
   - regulator-name
-- 
2.39.2