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Input: ads7846: Add description how to use internal reference (ADS7846) 

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

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Alexander Stein 2016-02-29 08:06:35 +01:00 committed by Rob Herring
parent 8fe420da36
commit 299b207dbc
1 changed files with 2 additions and 0 deletions
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Documentation/devicetree/bindings/input/ads7846.txt
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@ -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