1 * 74XX MMIO GPIO driver
2
3 Required 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
24 Example:
25 ctrl: gpio@30008004 {
26 compatible = "ti,74174";
27 reg = <0x30008004 0x1>;
28 gpio-controller;
29 #gpio-cells = <2>;
30 };
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