This is a dummy GPIO controller which can be used in place of the real
hardware GPIO controller (for example, an external GPIO expander) before
actual hardware is available.
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@xxxxxxxx>
---
.../devicetree/bindings/gpio/gpio-mockup.txt | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio-mockup.txt
diff --git a/Documentation/devicetree/bindings/gpio/gpio-mockup.txt b/Documentation/devicetree/bindings/gpio/gpio-mockup.txt
new file mode 100644
index 000000000000..585f04e356fc
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-mockup.txt
@@ -0,0 +1,22 @@
+Mockup GPIO controller bindings
+
+This creates a dummy GPIO controller which can be used for testing higher level
+drivers or userspace before actual hardware is available.
+
+Required properties:
+- compatible: Should contain "gpio-mockup"
+- gpio-controller : Marks the device node as a gpio controller.
+- #gpio-cells : Should be two. The first cell is the pin number and
+ the second cell is used to specify the gpio polarity:
+ 0 = active high
+ 1 = active low
+- nr-gpios: The number of dummy GPIOs
+
+Example:
+
+ gpio-mockup0 {
+ compatible = "gpio-mockup";
+ nr-gpios = <32>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
--
2.11.0
