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-* Synopsys DesignWare APB GPIO controller
-
-Required properties:
-- compatible : Should contain "snps,dw-apb-gpio"
-- reg : Address and length of the register set for the device.
-- #address-cells : should be 1 (for addressing port subnodes).
-- #size-cells : should be 0 (port subnodes).
-
-The GPIO controller has a configurable number of ports, each of which are
-represented as child nodes with the following properties:
-
-Required properties:
-- compatible : "snps,dw-apb-gpio-port"
-- 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
-- reg : The integer port index of the port, a single cell.
-
-Optional properties:
-- interrupt-controller : The first port may be configured to be an interrupt
-controller.
-- #interrupt-cells : Specifies the number of cells needed to encode an
- interrupt. Shall be set to 2. The first cell defines the interrupt number,
- the second encodes the triger flags encoded as described in
- Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
-- interrupts : The interrupts to the parent controller raised when GPIOs
- generate the interrupts. If the controller provides one combined interrupt
- for all GPIOs, specify a single interrupt. If the controller provides one
- interrupt for each GPIO, provide a list of interrupts that correspond to each
- of the GPIO pins. When specifying multiple interrupts, if any are unconnected,
- use the interrupts-extended property to specify the interrupts and set the
- interrupt controller handle for unused interrupts to 0.
-- snps,nr-gpios : The number of pins in the port, a single cell.
-- resets : Reset line for the controller.
-
-Example:
-
-gpio: gpio@20000 {
- compatible = "snps,dw-apb-gpio";
- reg = <0x20000 0x1000>;
- #address-cells = <1>;
- #size-cells = <0>;
-
- porta: gpio@0 {
- compatible = "snps,dw-apb-gpio-port";
- gpio-controller;
- #gpio-cells = <2>;
- snps,nr-gpios = <8>;
- reg = <0>;
- interrupt-controller;
- #interrupt-cells = <2>;
- interrupt-parent = <&vic1>;
- interrupts = <0>;
- };
-
- portb: gpio@1 {
- compatible = "snps,dw-apb-gpio-port";
- gpio-controller;
- #gpio-cells = <2>;
- snps,nr-gpios = <8>;
- reg = <1>;
- };
-};