dt: tegra gpio: Flesh out binding documentation
Document the required reg and interrupts properties. Add a complete example. Signed-off-by: Stephen Warren <swarren@nvidia.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Olof Johansson <olof@lixom.net>
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@ -2,7 +2,25 @@ NVIDIA Tegra 2 GPIO controller
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Required properties:
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- compatible : "nvidia,tegra20-gpio"
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- reg : Physical base address and length of the controller's registers.
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- interrupts : The interrupt outputs from the controller.
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- #gpio-cells : Should be two. The first cell is the pin number and the
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second cell is used to specify optional parameters:
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- bit 0 specifies polarity (0 for normal, 1 for inverted)
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- gpio-controller : Marks the device node as a GPIO controller.
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Example:
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gpio: gpio@6000d000 {
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compatible = "nvidia,tegra20-gpio";
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reg = < 0x6000d000 0x1000 >;
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interrupts = < 0 32 0x04
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0 33 0x04
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0 34 0x04
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0 35 0x04
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0 55 0x04
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0 87 0x04
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0 89 0x04 >;
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#gpio-cells = <2>;
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gpio-controller;
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};
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