1Nomadik GPIO controller
2
3Required properties:
4- compatible            : Should be "st,nomadik-gpio".
5- reg                   : Physical base address and length of the controller's registers.
6- interrupts            : The interrupt outputs from the controller.
7- #gpio-cells           : Should be two:
8                            The first cell is the pin number.
9                            The second cell is used to specify optional parameters:
10                              - bits[3:0] trigger type and level flags:
11                                  1 = low-to-high edge triggered.
12                                  2 = high-to-low edge triggered.
13                                  4 = active high level-sensitive.
14                                  8 = active low level-sensitive.
15- gpio-controller       : Marks the device node as a GPIO controller.
16- interrupt-controller  : Marks the device node as an interrupt controller.
17- gpio-bank             : Specifies which bank a controller owns.
18- st,supports-sleepmode : Specifies whether controller can sleep or not
19
20Example:
21
22                gpio1: gpio@8012e080 {
23                        compatible = "st,nomadik-gpio";
24                        reg =  <0x8012e080 0x80>;
25                        interrupts = <0 120 0x4>;
26                        #gpio-cells = <2>;
27                        gpio-controller;
28                        interrupt-controller;
29                        st,supports-sleepmode;
30                        gpio-bank = <1>;
31                };
32