tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1Aspeed GPIO controller Device Tree Bindings
2-------------------------------------------
3
4Required properties:
5- compatible : Either "aspeed,ast2400-gpio" or "aspeed,ast2500-gpio"
6
7- #gpio-cells : Should be two
8 - First cell is the GPIO line number
9 - Second cell is used to specify optional
10 parameters (unused)
11
12- reg : Address and length of the register set for the device
13- gpio-controller : Marks the device node as a GPIO controller.
14- interrupts : Interrupt specifier (see interrupt bindings for
15 details)
16- interrupt-controller : Mark the GPIO controller as an interrupt-controller
17
18Optional properties:
19
20- interrupt-parent : The parent interrupt controller, optional if inherited
21- clocks : A phandle to the clock to use for debounce timings
22
23The gpio and interrupt properties are further described in their respective
24bindings documentation:
25
26- Documentation/devicetree/bindings/gpio/gpio.txt
27- Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
28
29 Example:
30 gpio@1e780000 {
31 #gpio-cells = <2>;
32 compatible = "aspeed,ast2400-gpio";
33 gpio-controller;
34 interrupts = <20>;
35 reg = <0x1e780000 0x1000>;
36 interrupt-controller;
37 };