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mmc: Don't reference Linux-specific OF_GPIO_ACTIVE_LOW flag in DT binding 

OF_GPIO_ACTIVE_LOW is a Linux implementation detail. The binding
document should be referring to GPIO_ACTIVE_LOW found in
include/dt-bindings/gpio/gpio.h.

Signed-off-by: Tuomas Tynkkynen <tuomas@tuxera.com>
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Tuomas Tynkkynen 2017-12-23 02:34:12 +02:00 committed by Rob Herring
parent afc3bca4cf
commit d7e9ab3c6d
1 changed files with 2 additions and 2 deletions
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Documentation/devicetree/bindings/mmc/mmc.txt
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@ -67,10 +67,10 @@ logic applies to the "wp-inverted" property.
CD and WP lines can be implemented on the hardware in one of two ways: as GPIOs,
specified in cd-gpios and wp-gpios properties, or as dedicated pins. Polarity of
dedicated pins can be specified, using *-inverted properties. GPIO polarity can
also be specified using the OF_GPIO_ACTIVE_LOW flag. This creates an ambiguity
also be specified using the GPIO_ACTIVE_LOW flag. This creates an ambiguity
in the latter case. We choose to use the XOR logic for GPIO CD and WP lines.
This means, the two properties are "superimposed," for example leaving the
OF_GPIO_ACTIVE_LOW flag clear and specifying the respective *-inverted
GPIO_ACTIVE_LOW flag clear and specifying the respective *-inverted property
property results in a double-inversion and actually means the "normal" line
polarity is in effect.