Bindings and documentation for AXM55xx SSP chip select controller.
Signed-off-by: Anders Berg <anders.berg@xxxxxxxxxxxxx>
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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@2010088030 {
+ compatible = "lsi,ssp-gpio";
+ #gpio-cells = <1>;
+ reg = <0x20 0x10088030 0x00 0x4>;
+ gpio-controller;
+ };
+
+ spi0: ssp@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
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