Documentation for APM X-Gene SoC GPIO controller DTS binding.
Signed-off-by: Feng Kan <fkan@xxxxxxx>
Reviewed-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
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.../devicetree/bindings/gpio/gpio-xgene.txt | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio-xgene.txt
diff --git a/Documentation/devicetree/bindings/gpio/gpio-xgene.txt b/Documentation/devicetree/bindings/gpio/gpio-xgene.txt
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+APM X-Gene SoC GPIO controller bindings
+
+This is a gpio controller that is part of the flash controller.
+This gpio controller controls a total of 48 gpios.
+
+Required properties:
+- compatible: "apm,xgene-gpio" for X-Gene GPIO controller
+- reg: Physical base address and size of the controller's registers
+- #gpio-cells: Should be two.
+ - first cell is the pin number
+ - second cell is used to specify optional parameters (unused)
+- gpio-controller: Marks the device node as a GPIO controller.
+
+Example:
+ gpio0: gpio0@1701c000 {
+ compatible = "apm,xgene-gpio";
+ reg = <0x0 0x1701c000 0x0 0x40>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
--
1.9.1
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