1OMAP GPIO controller bindings
2
3Required properties:
4- compatible:
5  - "ti,omap2-gpio" for OMAP2 controllers
6  - "ti,omap3-gpio" for OMAP3 controllers
7  - "ti,omap4-gpio" for OMAP4 controllers
8- gpio-controller : Marks the device node as a GPIO controller.
9- #gpio-cells : Should be two.
10  - first cell is the pin number
11  - second cell is used to specify optional parameters (unused)
12- interrupt-controller: Mark the device node as an interrupt controller.
13- #interrupt-cells : Should be 2.
14  The first cell is the GPIO number.
15  The second cell is used to specify flags:
16    bits[3:0] trigger type and level flags:
17      1 = low-to-high edge triggered.
18      2 = high-to-low edge triggered.
19      4 = active high level-sensitive.
20      8 = active low level-sensitive.
21
22OMAP specific properties:
23- ti,hwmods:		Name of the hwmod associated to the GPIO:
24			"gpio<X>", <X> being the 1-based instance number
25			from the HW spec.
26- ti,gpio-always-on: 	Indicates if a GPIO bank is always powered and
27			so will never lose its logic state.
28
29
30Example:
31
32gpio4: gpio4 {
33    compatible = "ti,omap4-gpio";
34    ti,hwmods = "gpio4";
35    gpio-controller;
36    #gpio-cells = <2>;
37    interrupt-controller;
38    #interrupt-cells = <2>;
39};
40