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Documentation: gpio: Add APM X-Gene SoC GPIO controller DTS binding

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Documentation for APM X-Gene SoC GPIO controller DTS binding.

Signed-off-by: Feng Kan <fkan@apm.com>
Reviewed-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Feng Kan 2014-07-31 12:03:26 -07:00 committed by Linus Walleij
parent 29cbf4589f
commit 1b5bda21b0
1 changed files with 22 additions and 0 deletions
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Documentation/devicetree/bindings/gpio/gpio-xgene.txt Normal file
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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 the gpio polarity:
0 = active high
1 = active low
- 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>;
};