Document LPM pin as optional.

Signed-off-by: Claudiu Beznea <[email protected]>
---
 Documentation/devicetree/bindings/regulator/mcp16502-regulator.txt | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/regulator/mcp16502-regulator.txt 
b/Documentation/devicetree/bindings/regulator/mcp16502-regulator.txt
index d86584ed4d93..451cc4e86b01 100644
--- a/Documentation/devicetree/bindings/regulator/mcp16502-regulator.txt
+++ b/Documentation/devicetree/bindings/regulator/mcp16502-regulator.txt
@@ -4,7 +4,8 @@ Required properties:
 - compatible: "microchip,mcp16502"
 - reg: I2C slave address
 - lpm-gpios: GPIO for LPM pin. Note that this GPIO *must* remain high during
-            suspend-to-ram, keeping the PMIC into HIBERNATE mode.
+            suspend-to-ram, keeping the PMIC into HIBERNATE mode; this
+            property is optional;
 - regulators: A node that houses a sub-node for each regulator within
               the device. Each sub-node is identified using the node's
               name. The content of each sub-node is defined by the
-- 
2.7.4

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