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>
This commit is contained in:
Stephen Warren 2012-01-04 08:39:34 +00:00 committed by Olof Johansson
parent d8017a975c
commit a38b84fce9

View file

@ -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;
};