35 lines
1.2 KiB
Plaintext
35 lines
1.2 KiB
Plaintext
Xilinx Zynq GPIO controller Device Tree Bindings
|
|
-------------------------------------------
|
|
|
|
Required properties:
|
|
- #gpio-cells : Should be two
|
|
- First cell is the GPIO line number
|
|
- Second cell is used to specify optional
|
|
parameters (unused)
|
|
- compatible : Should be "xlnx,zynq-gpio-1.0" or "xlnx,zynqmp-gpio-1.0"
|
|
- clocks : Clock specifier (see clock bindings for details)
|
|
- gpio-controller : Marks the device node as a GPIO controller.
|
|
- interrupts : Interrupt specifier (see interrupt bindings for
|
|
details)
|
|
- interrupt-controller : Marks the device node as an interrupt controller.
|
|
- #interrupt-cells : Should be 2. The first cell is the GPIO number.
|
|
The second cell bits[3:0] is used to specify trigger type and level flags:
|
|
1 = low-to-high edge triggered.
|
|
2 = high-to-low edge triggered.
|
|
4 = active high level-sensitive.
|
|
8 = active low level-sensitive.
|
|
- reg : Address and length of the register set for the device
|
|
|
|
Example:
|
|
gpio@e000a000 {
|
|
#gpio-cells = <2>;
|
|
compatible = "xlnx,zynq-gpio-1.0";
|
|
clocks = <&clkc 42>;
|
|
gpio-controller;
|
|
interrupt-parent = <&intc>;
|
|
interrupts = <0 20 4>;
|
|
interrupt-controller;
|
|
#interrupt-cells = <2>;
|
|
reg = <0xe000a000 0x1000>;
|
|
};
|