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pinctrl: pinctrl-mxs: document the missing pull-ups

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Some pins on the i.mx23 and i.mx28 are missing pull-ups, document that
oddity because it was difficult to know the expected behaviour.

Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
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Alexandre Belloni 2013-03-30 00:51:12 +01:00 committed by Shawn Guo
parent 7d40340864
commit d8880a126d
1 changed files with 4 additions and 0 deletions
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Documentation/devicetree/bindings/pinctrl/fsl,mxs-pinctrl.txt
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@ -70,6 +70,10 @@ Optional subnode-properties:
0: Disable the internal pull-up
1: Enable the internal pull-up
Note that when enabling the pull-up, the internal pad keeper gets disabled.
Also, some pins doesn't have a pull up, in that case, setting the fsl,pull-up
will only disable the internal pad keeper.
Examples:
pinctrl@80018000 {