About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

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




Custom Search

Based on kernel version 3.16. Page generated on 2014-08-06 21:37 EST.

1	Avionic Design N-bit GPIO expander bindings
2	
3	Required properties:
4	- compatible: should be "ad,gpio-adnp"
5	- reg: The I2C slave address for this device.
6	- interrupt-parent: phandle of the parent interrupt controller.
7	- interrupts: Interrupt specifier for the controllers interrupt.
8	- #gpio-cells: Should be 2. The first cell is the GPIO number and the
9	  second cell is used to specify optional parameters:
10	  - bit 0: polarity (0: normal, 1: inverted)
11	- gpio-controller: Marks the device as a GPIO controller
12	- nr-gpios: The number of pins supported by the controller.
13	
14	The GPIO expander can optionally be used as an interrupt controller, in
15	which case it uses the default two cell specifier as described in
16	Documentation/devicetree/bindings/interrupt-controller/interrupts.txt.
17	
18	Example:
19	
20		gpioext: gpio-controller@41 {
21			compatible = "ad,gpio-adnp";
22			reg = <0x41>;
23	
24			interrupt-parent = <&gpio>;
25			interrupts = <160 1>;
26	
27			gpio-controller;
28			#gpio-cells = <2>;
29	
30			interrupt-controller;
31			#interrupt-cells = <2>;
32	
33			nr-gpios = <64>;
34		};
Hide Line Numbers
About Kernel Documentation Linux Kernel Contact Linux Resources Linux Blog

Information is copyright its respective author. All material is available from the Linux Kernel Source distributed under a GPL License. This page is provided as a free service by mjmwired.net.