xref: /OK3568_Linux_fs/kernel/Documentation/devicetree/bindings/gpio/gpio-xgene.txt (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593SmuzhiyunAPM X-Gene SoC GPIO controller bindings
2*4882a593Smuzhiyun
3*4882a593SmuzhiyunThis is a gpio controller that is part of the flash controller.
4*4882a593SmuzhiyunThis gpio controller controls a total of 48 gpios.
5*4882a593Smuzhiyun
6*4882a593SmuzhiyunRequired properties:
7*4882a593Smuzhiyun- compatible: "apm,xgene-gpio" for X-Gene GPIO controller
8*4882a593Smuzhiyun- reg: Physical base address and size of the controller's registers
9*4882a593Smuzhiyun- #gpio-cells: Should be two.
10*4882a593Smuzhiyun	- first cell is the pin number
11*4882a593Smuzhiyun	- second cell is used to specify the gpio polarity:
12*4882a593Smuzhiyun		0 = active high
13*4882a593Smuzhiyun		1 = active low
14*4882a593Smuzhiyun- gpio-controller: Marks the device node as a GPIO controller.
15*4882a593Smuzhiyun
16*4882a593SmuzhiyunExample:
17*4882a593Smuzhiyun	gpio0: gpio0@1701c000 {
18*4882a593Smuzhiyun		compatible = "apm,xgene-gpio";
19*4882a593Smuzhiyun		reg = <0x0 0x1701c000 0x0 0x40>;
20*4882a593Smuzhiyun		gpio-controller;
21*4882a593Smuzhiyun		#gpio-cells = <2>;
22*4882a593Smuzhiyun	};
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