1 Cadence GPIO controller bindings
2
3 Required properties:
4 - compatible: should be "cdns,gpio-r1p02".
5 - reg: the register base address and size.
6 - #gpio-cells: should be 2.
7 * first cell is the GPIO number.
8 * second cell specifies the GPIO flags, as defined in
9 <dt-bindings/gpio/gpio.h>. Only the GPIO_ACTIVE_HIGH
10 and GPIO_ACTIVE_LOW flags are supported.
11 - gpio-controller: marks the device as a GPIO controller.
12 - clocks: should contain one entry referencing the peripheral clock driving
13 the GPIO controller.
14
15 Optional properties:
16 - ngpios: integer number of gpio lines supported by this controller, up to 32.
17 - interrupts: interrupt specifier for the controllers interrupt.
18 - interrupt-controller: marks the device as an interrupt controller. When
19 defined, interrupts, interrupt-parent and #interrupt-cells
20 are required.
21 - interrupt-cells: should be 2.
22 * first cell is the GPIO number you want to use as an IRQ source.
23 * second cell specifies the IRQ type, as defined in
24 <dt-bindings/interrupt-controller/irq.h>.
25 Currently only level sensitive IRQs are supported.
26
27
28 Example:
29 gpio0: gpio-controller@fd060000 {
30 compatible = "cdns,gpio-r1p02";
31 reg =<0xfd060000 0x1000>;
32
33 clocks = <&gpio_clk>;
34
35 interrupt-parent = <&gic>;
36 interrupts = <0 5 IRQ_TYPE_LEVEL_HIGH>;
37
38 gpio-controller;
39 #gpio-cells = <2>;
40
41 interrupt-controller;
42 #interrupt-cells = <2>;
43 };
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