[PATCH V1 2/2] dt-bindings: gpio: document the new active-state property

[Harish Jenny K N <harish_kandiga@xxxxxxxxxx>]

Add the information of active state of gpio pin
as property into device tree configuration using a
"active-state" property u8 array.

This is useful for user space applications to identify
active state of pins.

Note: The active-state attribute is completely optional.

Signed-off-by: Harish Jenny K N <harish_kandiga@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/gpio/gpio.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpio/gpio.txt b/Documentation/devicetree/bindings/gpio/gpio.txt
index a8895d3..3af3066 100644
--- a/Documentation/devicetree/bindings/gpio/gpio.txt
+++ b/Documentation/devicetree/bindings/gpio/gpio.txt
@@ -167,6 +167,9 @@ left to right from the passed array. An incomplete array (where the number
 of passed named are less than ngpios) will still be used up until the last
 provided valid line index.

+Optionally, a GPIO controller may also have an "active-state" property.
+This is an u8 array defining the information of active state of gpio pin.
+
 Example:

 gpio-controller@00000000 {
@@ -180,6 +183,7 @@ gpio-controller@00000000 {
 		"LED G", "LED B", "Col A", "Col B", "Col C", "Col D",
 		"Row A", "Row B", "Row C", "Row D", "NMI button",
 		"poweroff", "reset";
+	active-state = /bits/ 8 <0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0>;
 }

 The GPIO chip may contain GPIO hog definitions. GPIO hogging is a mechanism
--
2.7.4