xref: /OK3568_Linux_fs/kernel/Documentation/devicetree/bindings/gpio/gpio-clps711x.txt (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593SmuzhiyunCirrus Logic CLPS711X GPIO controller
2*4882a593Smuzhiyun
3*4882a593SmuzhiyunRequired properties:
4*4882a593Smuzhiyun- compatible: Should be "cirrus,ep7209-gpio"
5*4882a593Smuzhiyun- reg: Physical base GPIO controller registers location and length.
6*4882a593Smuzhiyun  There should be two registers, first is DATA register, the second
7*4882a593Smuzhiyun  is DIRECTION.
8*4882a593Smuzhiyun- gpio-controller: Marks the device node as a gpio controller.
9*4882a593Smuzhiyun- #gpio-cells: Should be two. The first cell is the pin number and
10*4882a593Smuzhiyun  the second cell is used to specify the gpio polarity:
11*4882a593Smuzhiyun    0 = active high
12*4882a593Smuzhiyun    1 = active low
13*4882a593Smuzhiyun
14*4882a593SmuzhiyunNote: Each GPIO port should have an alias correctly numbered in "aliases"
15*4882a593Smuzhiyunnode.
16*4882a593Smuzhiyun
17*4882a593SmuzhiyunExample:
18*4882a593Smuzhiyun
19*4882a593Smuzhiyunaliases {
20*4882a593Smuzhiyun	gpio0 = &porta;
21*4882a593Smuzhiyun};
22*4882a593Smuzhiyun
23*4882a593Smuzhiyunporta: gpio@80000000 {
24*4882a593Smuzhiyun	compatible = "cirrus,ep7312-gpio","cirrus,ep7209-gpio";
25*4882a593Smuzhiyun	reg = <0x80000000 0x1>, <0x80000040 0x1>;
26*4882a593Smuzhiyun	gpio-controller;
27*4882a593Smuzhiyun	#gpio-cells = <2>;
28*4882a593Smuzhiyun};
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