For active low lines the semantic of output-low and output-high is hard to grasp because there is a double negation involved and so output-low is actually a request to drive the line high (aka inactive). So introduce output-inactive and output-active with the same semantic as output-low and output-high respectively have today, but with a more sensible name. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx> --- Documentation/devicetree/bindings/gpio/gpio.txt | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/Documentation/devicetree/bindings/gpio/gpio.txt b/Documentation/devicetree/bindings/gpio/gpio.txt index d82c32217fff..2f037bbd3ffa 100644 --- a/Documentation/devicetree/bindings/gpio/gpio.txt +++ b/Documentation/devicetree/bindings/gpio/gpio.txt @@ -209,15 +209,21 @@ Required properties: - gpios: Store the GPIO information (id, flags, ...) for each GPIO to affect. Shall contain an integer multiple of the number of cells specified in its parent node (GPIO controller node). + Only one of the following properties scanned in the order shown below. This means that when multiple properties are present they will be searched in the order presented below and the first match is taken as the intended configuration. -- input: A property specifying to set the GPIO direction as input. -- output-low A property specifying to set the GPIO direction as output with - the value low. -- output-high A property specifying to set the GPIO direction as output with - the value high. +- input: A property specifying to set the GPIO direction as input. +- output-inactive: A property specifying to set the GPIO direction as output + with the inactive value (depending on the line's polarity, + which is active-high by default) +- output-active: A property specifying to set the GPIO direction as output + with the active value. + +For backwards compatibility "output-low" and "output-high" are supported as +aliases for "output-inactive" and "output-active" respectively. Their usage is +misleading for active-low outputs, so their use is discouraged. Optional properties: - line-name: The GPIO label name. If not present the node name is used. -- 2.39.2
