gpio-rcar: Add interrupt controller support to the DT bindings

Update the DT bindings documentation with the interrupt-controller
and #interrupt-cells properties.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
index cb3dc7bcd8e6..8655df9440d5 100644
--- a/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
+++ b/Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
@@ -23,6 +23,10 @@ Required Properties:
 Please refer to gpio.txt in this directory for details of gpio-ranges property
 and the common GPIO bindings used by client devices.
 
+The GPIO controller also acts as an interrupt controller. It uses the default
+two cells specifier as described in Documentation/devicetree/bindings/
+interrupt-controller/interrupts.txt.
+
 Example: R8A7779 (R-Car H1) GPIO controller nodes
 
         gpio0: gpio@ffc40000 {
@@ -33,6 +37,8 @@ Example: R8A7779 (R-Car H1) GPIO controller nodes
                 #gpio-cells = <2>;
                 gpio-controller;
                 gpio-ranges = <&pfc 0 0 32>;
+                interrupt-controller;
+                #interrupt-cells = <2>;
         };
         ...
         gpio6: gpio@ffc46000 {
@@ -43,4 +49,6 @@ Example: R8A7779 (R-Car H1) GPIO controller nodes
                 #gpio-cells = <2>;
                 gpio-controller;
                 gpio-ranges = <&pfc 0 192 9>;
+                interrupt-controller;
+                #interrupt-cells = <2>;
         };