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Commit a38b84fc authored by Stephen Warren's avatar Stephen Warren Committed by Olof Johansson
Browse files

dt: tegra gpio: Flesh out binding documentation 



Document the required reg and interrupts properties.
Add a complete example.

Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
Acked-by: default avatarGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: default avatarOlof Johansson <olof@lixom.net>
parent d8017a97

Documentation/devicetree/bindings/gpio/gpio_nvidia.txt

+18 −0
Original line number Diff line number Diff line
@@ -2,7 +2,25 @@ NVIDIA Tegra 2 GPIO controller 


Required properties:

- compatible : "nvidia,tegra20-gpio"

- reg : Physical base address and length of the controller's registers.

- interrupts : The interrupt outputs from the controller.

- #gpio-cells : Should be two. The first cell is the pin number and the

  second cell is used to specify optional parameters:

  - bit 0 specifies polarity (0 for normal, 1 for inverted)

- gpio-controller : Marks the device node as a GPIO controller.



Example:



gpio: gpio@6000d000 {

	compatible = "nvidia,tegra20-gpio";

	reg = < 0x6000d000 0x1000 >;

	interrupts = < 0 32 0x04

		       0 33 0x04

		       0 34 0x04

		       0 35 0x04

		       0 55 0x04

		       0 87 0x04

		       0 89 0x04 >;

	#gpio-cells = <2>;

	gpio-controller;

};