1* Renesas R-Car GPIO Controller
2
3Required Properties:
4
5  - compatible: should contain one of the following.
6    - "renesas,gpio-r8a7778": for R8A7778 (R-Mobile M1) compatible GPIO controller.
7    - "renesas,gpio-r8a7779": for R8A7779 (R-Car H1) compatible GPIO controller.
8    - "renesas,gpio-r8a7790": for R8A7790 (R-Car H2) compatible GPIO controller.
9    - "renesas,gpio-r8a7791": for R8A7791 (R-Car M2-W) compatible GPIO controller.
10    - "renesas,gpio-r8a7793": for R8A7793 (R-Car M2-N) compatible GPIO controller.
11    - "renesas,gpio-r8a7794": for R8A7794 (R-Car E2) compatible GPIO controller.
12    - "renesas,gpio-rcar": for generic R-Car GPIO controller.
13
14  - reg: Base address and length of each memory resource used by the GPIO
15    controller hardware module.
16
17  - interrupt-parent: phandle of the parent interrupt controller.
18  - interrupts: Interrupt specifier for the controllers interrupt.
19
20  - gpio-controller: Marks the device node as a gpio controller.
21  - #gpio-cells: Should be 2. The first cell is the GPIO number and the second
22    cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>. Only the
23    GPIO_ACTIVE_HIGH and GPIO_ACTIVE_LOW flags are supported.
24  - gpio-ranges: Range of pins managed by the GPIO controller.
25
26Optional properties:
27
28  - clocks: Must contain a reference to the functional clock.  The property is
29    mandatory if the hardware implements a controllable functional clock for
30    the GPIO instance.
31
32Please refer to gpio.txt in this directory for details of gpio-ranges property
33and the common GPIO bindings used by client devices.
34
35The GPIO controller also acts as an interrupt controller. It uses the default
36two cells specifier as described in Documentation/devicetree/bindings/
37interrupt-controller/interrupts.txt.
38
39Example: R8A7779 (R-Car H1) GPIO controller nodes
40
41	gpio0: gpio@ffc40000 {
42		compatible = "renesas,gpio-r8a7779", "renesas,gpio-rcar";
43		reg = <0xffc40000 0x2c>;
44		interrupt-parent = <&gic>;
45		interrupts = <0 141 0x4>;
46		#gpio-cells = <2>;
47		gpio-controller;
48		gpio-ranges = <&pfc 0 0 32>;
49		interrupt-controller;
50		#interrupt-cells = <2>;
51	};
52	...
53	gpio6: gpio@ffc46000 {
54		compatible = "renesas,gpio-r8a7779", "renesas,gpio-rcar";
55		reg = <0xffc46000 0x2c>;
56		interrupt-parent = <&gic>;
57		interrupts = <0 147 0x4>;
58		#gpio-cells = <2>;
59		gpio-controller;
60		gpio-ranges = <&pfc 0 192 9>;
61		interrupt-controller;
62		#interrupt-cells = <2>;
63	};
64