Bindings and documentation for AXM55xx SSP chip select controller.

Signed-off-by: Anders Berg <redacted>
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 .../devicetree/bindings/gpio/gpio-axxia-sspcs.txt  | 36 ++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-axxia-sspcs.txt

diff --git a/Documentation/devicetree/bindings/gpio/gpio-axxia-sspcs.txt b/Documentation/devicetree/bindings/gpio/gpio-axxia-sspcs.txt
new file mode 100644
index 0000000..a64c695
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+++ b/Documentation/devicetree/bindings/gpio/gpio-axxia-sspcs.txt

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+* Axxia SSP GPIO chip-select driver
+
+The Axxia device has a ARM PL022 Prime Cell SSP controller with an extension of
+five chip select signals that may be controlled by software. This driver
+exports them as GPIOs.
+
+Required properties:
+
+  * compatible: should be "lsi,ssp-gpio"
+  * reg: address of the chip select control register.
+  * gpio-controller: mark the device as gpio controller
+  * #gpio-cells: should be 1 and this field specifies the chip select number
+
+Example:
+-------
+
+       spics: sspgpio at 2010088030 {
+               compatible = "lsi,ssp-gpio";
+               #gpio-cells = <1>;
+               reg = <0x20 0x10088030 0x00 0x4>;
+               gpio-controller;
+       };
+
+       spi0: ssp at 2010088000 {
+               compatible = "arm,pl022", "arm,primecell";
+               #address-cells = <1>;
+               #size-cells = <0>;
+               reg = <0x20 0x10088000 0x00 0x1000>;
+               num-cs = <5>;
+               cs-gpios = <&spics 0>,
+                          <&spics 1>,
+                          <&spics 2>,
+                          <&spics 3>,
+                          <&spics 4>;
+               ...
+      };
--

1.9.1