1 Cirrus Logic CLPS711X GPIO controller
2
3 Required properties:
4 - compatible: Should be "cirrus,ep7209-gpio"
5 - reg: Physical base GPIO controller registers location and length.
6 There should be two registers, first is DATA register, the second
7 is DIRECTION.
8 - gpio-controller: Marks the device node as a gpio controller.
9 - #gpio-cells: Should be two. The first cell is the pin number and
10 the second cell is used to specify the gpio polarity:
11 0 = active high
12 1 = active low
13
14 Note: Each GPIO port should have an alias correctly numbered in "aliases"
15 node.
16
17 Example:
18
19 aliases {
20 gpio0 = &porta;
21 };
22
23 porta: gpio@80000000 {
24 compatible = "cirrus,ep7312-gpio","cirrus,ep7209-gpio";
25 reg = <0x80000000 0x1>, <0x80000040 0x1>;
26 gpio-controller;
27 #gpio-cells = <2>;
28 };
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