1* 74XX MMIO GPIO driver
2
3Required properties:
4- compatible: Should contain one of the following:
5   "ti,741g125": for 741G125 (1-bit Input),
6   "ti,741g174": for 741G74 (1-bit Output),
7   "ti,742g125": for 742G125 (2-bit Input),
8   "ti,7474"   : for 7474 (2-bit Output),
9   "ti,74125"  : for 74125 (4-bit Input),
10   "ti,74175"  : for 74175 (4-bit Output),
11   "ti,74365"  : for 74365 (6-bit Input),
12   "ti,74174"  : for 74174 (6-bit Output),
13   "ti,74244"  : for 74244 (8-bit Input),
14   "ti,74273"  : for 74273 (8-bit Output),
15   "ti,741624" : for 741624 (16-bit Input),
16   "ti,7416374": for 7416374 (16-bit Output).
17- reg: Physical base address and length where IC resides.
18- gpio-controller: Marks the device node as a gpio controller.
19- #gpio-cells: Should be two. The first cell is the pin number and
20   the second cell is used to specify the GPIO polarity:
21    0 = Active High,
22    1 = Active Low.
23
24Example:
25	ctrl: gpio@30008004 {
26		compatible = "ti,74174";
27		reg = <0x30008004 0x1>;
28		gpio-controller;
29		#gpio-cells = <2>;
30	};
31