Documentation/devicetree/bindings/gpio/gpio-adnp.txt

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/gpio/gpio-adnp.txt

File Facts

System
Linux kernel
Corpus path
Documentation/devicetree/bindings/gpio/gpio-adnp.txt
Extension
.txt
Size
972 bytes
Lines
34
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

Avionic Design N-bit GPIO expander bindings

Required properties:
- compatible: should be "ad,gpio-adnp"
- reg: The I2C slave address for this device.
- interrupts: Interrupt specifier for the controllers interrupt.
- #gpio-cells: Should be 2. The first cell is the GPIO number and the
  second cell is used to specify optional parameters:
  - bit 0: polarity (0: normal, 1: inverted)
- gpio-controller: Marks the device as a GPIO controller
- nr-gpios: The number of pins supported by the controller.

The GPIO expander can optionally be used as an interrupt controller, in
which case it uses the default two cell specifier as described in
Documentation/devicetree/bindings/interrupt-controller/interrupts.txt.

Example:

	gpioext: gpio-controller@41 {
		compatible = "ad,gpio-adnp";
		reg = <0x41>;

		interrupt-parent = <&gpio>;
		interrupts = <160 1>;

		gpio-controller;
		#gpio-cells = <2>;

		interrupt-controller;
		#interrupt-cells = <2>;

		nr-gpios = <64>;
	};

Annotation

Implementation Notes