dt-bindings: pinctrl: add external interrupt support to MT7622 pinctrl

moore-bros · linusw · commit 6ee6fbde42f4 · 2018-05-24T09:35:30.000+02:00
Extend the capability of MT7622 pinctrl with adding EINT so that each
GPIO can be used to notify CPU when a signal state is changing on the
line as an external interrupt.

Signed-off-by: Sean Wang &lt;sean.wang@mediatek.com&gt;
Reviewed-by: Rob Herring &lt;robh@kernel.org&gt;
Signed-off-by: Linus Walleij &lt;linus.walleij@linaro.org&gt;
diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-mt7622.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-mt7622.txt
@@ -9,6 +9,16 @@ Required properties for the root node:
  - #gpio-cells: Should be two. The first cell is the pin number and the
    second is the GPIO flags.
 
+Optional properties:
+- interrupt-controller  : Marks the device node as an interrupt controller
+
+If the property interrupt-controller is defined, following property is required
+- reg-names: A string describing the "reg" entries. Must contain "eint".
+- interrupts : The interrupt output from the controller.
+- #interrupt-cells: Should be two.
+- interrupt-parent: Phandle of the interrupt parent to which the external
+  GPIO interrupts are forwarded to.
+
 Please refer to pinctrl-bindings.txt in this directory for details of the
 common pinctrl bindings used by client devices, including the meaning of the
 phrase "pin configuration node".
