Hi Rob,
 
 On mer., mars 29 2017, Rob Herring [off-list ref] wrote:

quoted

+GPIO subnode:
+
+Please refer to gpio.txt in this directory for details of gpio-ranges property
+and the common GPIO bindings used by client devices.
+
+Required properties for gpio driver under the gpio subnode:

Why does this need to be a sub node? You should probably have a 
compatible if it is.

It is needed to be able to have a phandle associated to the gpio. Then
the other node can refer to it.

But if we can do without it I would happy to do it.

quoted

+- interrupts: List of interrupt specifier for the controllers interrupt.
+- gpio-controller: Marks the device node as a gpio controller.
+- #gpio-cells: Should be 2. The first cell is the GPIO number and the
+   second cell specifies GPIO flags, as defined in
+   <dt-bindings/gpio/gpio.h>. Only the GPIO_ACTIVE_HIGH and
+   GPIO_ACTIVE_LOW flags are supported.
+- gpio-ranges: Range of pins managed by the GPIO controller.
+
+Xtal Clock bindings for Marvell Armada 37xx SoCs
+------------------------------------------------
+
+see Documentation/devicetree/bindings/clock/armada3700-xtal-clock.txt
+
+
+Example:
+pinctrl_sb: pinctrl-sb@18800 {

pinctrl@

OK

quoted

+	compatible = "marvell,armada3710-sb-pinctrl", "syscon", "simple-mfd";
+	reg = <0x18800 0x100>, <0x18C00 0x20>;
+	gpiosb: gpiosb {

gpio@

There is no reg property so we don't use the @

Thanks,

Gregory

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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