1 MOXA ART GPIO Controller
5 - #gpio-cells : Should be 2, The first cell is the pin number,
6 the second cell is used to specify polarity:
9 - compatible : Must be "moxa,moxart-gpio"
10 - reg : Should contain registers location and length
17 compatible = "moxa,moxart-gpio";
18 reg = <0x98700000 0xC>;