[PATCH 7/8] mfd/regulator: dt-bindings: max77686: Document gpio property

[Krzysztof Kozlowski]

Document usage of gpio property which turns on external control over
regulator.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski at samsung.com>
---
 Documentation/devicetree/bindings/mfd/max77686.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/max77686.txt b/Documentation/devicetree/bindings/mfd/max77686.txt
index 75fdfaf41831..e41dfa7e2b90 100644
--- a/Documentation/devicetree/bindings/mfd/max77686.txt
+++ b/Documentation/devicetree/bindings/mfd/max77686.txt
@@ -39,6 +39,9 @@ to get matched with their hardware counterparts as follow:
 	-BUCKn	:	1-4.
   Use standard regulator bindings for it ('regulator-off-in-suspend').
 
+  Optional properties:
+  - gpio : GPIO to use for external control. Valid only for LDO20, LDO21,
+    LDO22, BUCK8 and BUCK9 regulators.
 
 Example:
 
-- 
1.9.1