162306a36Sopenharmony_ciAvionic Design N-bit GPIO expander bindings
262306a36Sopenharmony_ci
362306a36Sopenharmony_ciRequired properties:
462306a36Sopenharmony_ci- compatible: should be "ad,gpio-adnp"
562306a36Sopenharmony_ci- reg: The I2C slave address for this device.
662306a36Sopenharmony_ci- interrupts: Interrupt specifier for the controllers interrupt.
762306a36Sopenharmony_ci- #gpio-cells: Should be 2. The first cell is the GPIO number and the
862306a36Sopenharmony_ci  second cell is used to specify optional parameters:
962306a36Sopenharmony_ci  - bit 0: polarity (0: normal, 1: inverted)
1062306a36Sopenharmony_ci- gpio-controller: Marks the device as a GPIO controller
1162306a36Sopenharmony_ci- nr-gpios: The number of pins supported by the controller.
1262306a36Sopenharmony_ci
1362306a36Sopenharmony_ciThe GPIO expander can optionally be used as an interrupt controller, in
1462306a36Sopenharmony_ciwhich case it uses the default two cell specifier as described in
1562306a36Sopenharmony_ciDocumentation/devicetree/bindings/interrupt-controller/interrupts.txt.
1662306a36Sopenharmony_ci
1762306a36Sopenharmony_ciExample:
1862306a36Sopenharmony_ci
1962306a36Sopenharmony_ci	gpioext: gpio-controller@41 {
2062306a36Sopenharmony_ci		compatible = "ad,gpio-adnp";
2162306a36Sopenharmony_ci		reg = <0x41>;
2262306a36Sopenharmony_ci
2362306a36Sopenharmony_ci		interrupt-parent = <&gpio>;
2462306a36Sopenharmony_ci		interrupts = <160 1>;
2562306a36Sopenharmony_ci
2662306a36Sopenharmony_ci		gpio-controller;
2762306a36Sopenharmony_ci		#gpio-cells = <2>;
2862306a36Sopenharmony_ci
2962306a36Sopenharmony_ci		interrupt-controller;
3062306a36Sopenharmony_ci		#interrupt-cells = <2>;
3162306a36Sopenharmony_ci
3262306a36Sopenharmony_ci		nr-gpios = <64>;
3362306a36Sopenharmony_ci	};
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