[PATCH 1/1] Input: ads7846: Add description how to use internal reference (ADS7846)

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By simply setting vref-mv to 0 the internal reference will be used.
Document that!

Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/input/ads7846.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/ads7846.txt b/Documentation/devicetree/bindings/input/ads7846.txt
index df8b127..0414b4d 100644
--- a/Documentation/devicetree/bindings/input/ads7846.txt
+++ b/Documentation/devicetree/bindings/input/ads7846.txt
@@ -29,6 +29,8 @@ Optional properties:
 	ti,vref-delay-usecs		vref supply delay in usecs, 0 for
 					external vref (u16).
 	ti,vref-mv			The VREF voltage, in millivolts (u16).
+					Set to 0 to use internal refernce
+					(ADS7846).
 	ti,keep-vref-on			set to keep vref on for differential
 					measurements as well
 	ti,swap-xy			swap x and y axis
-- 
2.4.10

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