1 * Synopsys DesignWare APB GPIO controller
4 - compatible : Should contain "snps,dw-apb-gpio"
5 - reg : Address and length of the register set for the device.
6 - #address-cells : should be 1 (for addressing port subnodes).
7 - #size-cells : should be 0 (port subnodes).
9 The GPIO controller has a configurable number of ports, each of which are
10 represented as child nodes with the following properties:
13 - compatible : "snps,dw-apb-gpio-port"
14 - gpio-controller : Marks the device node as a gpio controller.
15 - #gpio-cells : Should be two. The first cell is the pin number and
16 the second cell is used to specify the gpio polarity:
19 - reg : The integer port index of the port, a single cell.
22 - interrupt-controller : The first port may be configured to be an interrupt
24 - #interrupt-cells : Specifies the number of cells needed to encode an
25 interrupt. Shall be set to 2. The first cell defines the interrupt number,
26 the second encodes the triger flags encoded as described in
27 Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
28 - interrupt-parent : The parent interrupt controller.
29 - interrupts : The interrupt to the parent controller raised when GPIOs
30 generate the interrupts.
31 - snps,nr-gpios : The number of pins in the port, a single cell.
36 compatible = "snps,dw-apb-gpio";
37 reg = <0x20000 0x1000>;
41 porta: gpio-controller@0 {
42 compatible = "snps,dw-apb-gpio-port";
48 #interrupt-cells = <2>;
49 interrupt-parent = <&vic1>;
53 portb: gpio-controller@1 {
54 compatible = "snps,dw-apb-gpio-port";