1Altera GPIO controller bindings
2
3Required properties:
4- compatible:
5  - "altr,pio-1.0"
6- reg: Physical base address and length of the controller's registers.
7
8Optional properties:
9- altr,gpio-bank-width: Width of the GPIO bank. This defines how many pins the
10  GPIO device has. Ranges between 1-32. Optional and defaults to 32 if not
11  specified.
12- gpio-bank-name: bank name attached to this device.
13
14Example:
15
16user_led_pio_8out: gpio@0x4cc0 {
17	compatible = "altr,pio-1.0";
18	reg = <0x00004cc0 0x00000010>;
19	resetvalue = <255>;
20	altr,gpio-bank-width = <8>;
21	#gpio-cells = <2>;
22	gpio-controller;
23	gpio-bank-name = "led";
24};
25
26In this example, the gpio can be accessed as led[0..7] using gpio command of
27u-boot.
28==> gpio clear led0
29