b/Documentation/devicetree/bindings/pinctrl/renesas,pfc-pinctrl.txt
@@ -68,6 +68,9 @@ Pin Configuration Node Properties:
GPIO
----
+On SH7372, SH73A0, R8A73A4 and R8A7740 the PFC node is also a GPIO controller
+node.
+
Required Properties:
- gpio-controller: Marks the device node as a gpio controller.
@@ -81,7 +84,11 @@ with values derived from the SoC user manual.
<[phandle of the gpio controller node]
[pin number within the gpio controller]
[flags and pull up/down]>
+
+On other mach-shmobile platforms GPIO is handled by the gpio-rcar driver.
+Please refer to Documentation/devicetree/bindings/gpio/renesas,gpio-rcar.txt
+for documentation of the GPIO device tree bindings on those platforms.
> [snip]
>