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-rw-r--r--Documentation/devicetree/bindings/gpio/gpio_nvidia.txt7
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt b/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt
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+++ b/Documentation/devicetree/bindings/gpio/gpio_nvidia.txt
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+NVIDIA Tegra 2 GPIO controller
+
+Required properties:
+- compatible : "nvidia,tegra250-gpio"
+- #gpio-cells : Should be two. The first cell is the pin number and the
+ second cell is used to specify optional parameters (currently unused).
+- gpio-controller : Marks the device node as a GPIO controller.