Update the binding to be able to configure the LED
sync to turn on.

The LM36922 has one output but can sync current to 2 LED
strings.  The user may only use one sync so the other
syncs need to be disabled.

The LM36923 has 3 LED syncs.

Signed-off-by: Dan Murphy <[email protected]>
---
 Documentation/devicetree/bindings/leds/leds-lm3692x.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/leds/leds-lm3692x.txt 
b/Documentation/devicetree/bindings/leds/leds-lm3692x.txt
index 6c9074f84a51..08b352840bd7 100644
--- a/Documentation/devicetree/bindings/leds/leds-lm3692x.txt
+++ b/Documentation/devicetree/bindings/leds/leds-lm3692x.txt
@@ -20,7 +20,10 @@ Optional properties:
        - vled-supply : LED supply
 
 Required child properties:
-       - reg : 0
+       - reg : 0 - Will enable all LED sync paths
+               1 - Will enable the LED1 sync
+               2 - Will enable the LED2 sync
+               3 - Will enable the LED3 sync (LM36923 only)
 
 Optional child properties:
        - label : see Documentation/devicetree/bindings/leds/common.txt
-- 
2.17.0.582.gccdcbd54c

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