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+* 74XX MMIO GPIO driver
+
+Required properties:
+- compatible: Should contain one of the following:
+ "ti,741g125": for 741G125 (1-bit Input),
+ "ti,741g174": for 741G74 (1-bit Output),
+ "ti,742g125": for 742G125 (2-bit Input),
+ "ti,7474" : for 7474 (2-bit Output),
+ "ti,74125" : for 74125 (4-bit Input),
+ "ti,74175" : for 74175 (4-bit Output),
+ "ti,74365" : for 74365 (6-bit Input),
+ "ti,74174" : for 74174 (6-bit Output),
+ "ti,74244" : for 74244 (8-bit Input),
+ "ti,74273" : for 74273 (8-bit Output),
+ "ti,741624" : for 741624 (16-bit Input),
+ "ti,7416374": for 7416374 (16-bit Output).
+- reg: Physical base address and length where IC resides.
+- gpio-controller: Marks the device node as a gpio controller.
+- #gpio-cells: Should be two. The first cell is the pin number and
+ the second cell is used to specify the GPIO polarity:
+ 0 = Active High,
+ 1 = Active Low.
+
+Example:
+ ctrl: gpio@30008004 {
+ compatible = "ti,74174";
+ reg = <0x30008004 0x1>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ };