35 lines
1.0 KiB
Plaintext
35 lines
1.0 KiB
Plaintext
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Avionic Design N-bit GPIO expander bindings
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Required properties:
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- compatible: should be "ad,gpio-adnp"
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- reg: The I2C slave address for this device.
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- interrupt-parent: phandle of the parent interrupt controller.
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- interrupts: Interrupt specifier for the controllers interrupt.
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- #gpio-cells: Should be 2. The first cell is the GPIO number and the
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second cell is used to specify optional parameters:
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- bit 0: polarity (0: normal, 1: inverted)
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- gpio-controller: Marks the device as a GPIO controller
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- nr-gpios: The number of pins supported by the controller.
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The GPIO expander can optionally be used as an interrupt controller, in
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which case it uses the default two cell specifier as described in
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Documentation/devicetree/bindings/interrupt-controller/interrupts.txt.
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Example:
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gpioext: gpio-controller@41 {
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compatible = "ad,gpio-adnp";
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reg = <0x41>;
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interrupt-parent = <&gpio>;
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interrupts = <160 1>;
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gpio-controller;
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#gpio-cells = <2>;
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interrupt-controller;
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#interrupt-cells = <2>;
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nr-gpios = <64>;
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};
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