On 06/26/2013 05:46 AM, Christian Ruppert wrote:

On Wed, Jun 19, 2013 at 04:27:44PM -0600, Stephen Warren wrote:

quoted

On 06/18/2013 03:29 AM, Christian Ruppert wrote:

quoted

This patch adds the infrastructure required to register non-linear gpio
ranges through gpiolib and the standard GPIO device tree bindings.

I review this in case we decide to go with it anyway.

quoted

diff --git a/Documentation/devicetree/bindings/gpio/gpio.txt b/Documentation/devicetree/bindings/gpio/gpio.txt

quoted

+In addition, named groups of pins can be mapped to pin groups of a given
+pin controller:
+
+	gpio_pio_g: gpio-controller@1480 {
+		#gpio-cells = <2>;
+		compatible = "fsl,qe-pario-bank-e", "fsl,qe-pario-bank";
+		reg = <0x1480 0x18>;
+		gpio-controller;
+		gpio-ranges = <&pinctrl1 0 0 0>, <&pinctrl2 3 0 0>;
+		gpio-ranges-group-names = "foo", "bar";
+	};
+
+where,
+   &pinctrl1 and &pinctrl2 is the phandle to the pinctrl DT node.
+
+   The following value specifies the base GPIO offset of the pin range with
+   respect to the GPIO controller's base. The remaining two values must be
+   0 to indicate that a named pin group should be used for the respective
+   range. The number of pins in the range is the number of pins in the pin
+   group.

It'd be good to re-write this section in a similar style to the cleanup
patches that I sent for the existing gpio-ranges documentation. That
makes the format description more of a raw syntax than English text.

can you please point me to some place where I can find those patches on
the web?

The start of the thread is at:

https://lists.ozlabs.org/pipermail/devicetree-discuss/2013-June/thread.html#35462

Patch 1/7 has already been applied. 2/7 and on are really the conversion.