xref: /linux/Documentation/devicetree/bindings/pinctrl/renesas,rza2-pinctrl.yaml (revision 57390019b68b83f96eb98f490367b9df1f2d77cb) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/pinctrl/renesas,rza2-pinctrl.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Renesas RZ/A2 combined Pin and GPIO controller
8
9maintainers:
10  - Chris Brandt <chris.brandt@renesas.com>
11  - Geert Uytterhoeven <geert+renesas@glider.be>
12
13description:
14  The Renesas SoCs of the RZ/A2 series feature a combined Pin and GPIO
15  controller.
16  Pin multiplexing and GPIO configuration is performed on a per-pin basis.
17  Each port features up to 8 pins, each of them configurable for GPIO function
18  (port mode) or in alternate function mode.
19  Up to 8 different alternate function modes exist for each single pin.
20
21properties:
22  compatible:
23    const: "renesas,r7s9210-pinctrl" # RZ/A2M
24
25  reg:
26    maxItems: 1
27
28  gpio-controller: true
29
30  '#gpio-cells':
31    const: 2
32    description:
33      The first cell contains the global GPIO port index, constructed using the
34      RZA2_PIN() helper macro in r7s9210-pinctrl.h.
35      E.g. "RZA2_PIN(PORT6, 0)" for P6_0.
36
37  gpio-ranges:
38    maxItems: 1
39
40additionalProperties:
41  type: object
42
43  allOf:
44    - $ref: pincfg-node.yaml#
45    - $ref: pinmux-node.yaml#
46
47  description:
48    The child nodes of the pin controller designate pins to be used for
49    specific peripheral functions or as GPIO.
50
51    A pin multiplexing sub-node describes how to configure a set of
52    (or a single) pin in some desired alternate function mode.
53    The values for the pinmux properties are a combination of port name,
54    pin number and the desired function index. Use the RZA2_PINMUX macro
55    located in include/dt-bindings/pinctrl/r7s9210-pinctrl.h to easily
56    define these.
57    For assigning GPIO pins, use the macro RZA2_PIN also in
58    to express the desired port pin.
59
60  properties:
61    pinmux:
62      description:
63        Values are constructed from GPIO port number, pin number, and
64        alternate function configuration number using the RZA2_PINMUX()
65        helper macro in r7s9210-pinctrl.h.
66
67  required:
68    - pinmux
69
70  additionalProperties: false
71
72allOf:
73  - $ref: pinctrl.yaml#
74
75required:
76  - compatible
77  - reg
78  - gpio-controller
79  - '#gpio-cells'
80  - gpio-ranges
81
82examples:
83  - |
84    #include <dt-bindings/pinctrl/r7s9210-pinctrl.h>
85    pinctrl: pinctrl@fcffe000 {
86            compatible = "renesas,r7s9210-pinctrl";
87            reg = <0xfcffe000 0x1000>;
88
89            gpio-controller;
90            #gpio-cells = <2>;
91            gpio-ranges = <&pinctrl 0 0 176>;
92
93            /* Serial Console */
94            scif4_pins: serial4 {
95                    pinmux = <RZA2_PINMUX(PORT9, 0, 4)>, /* TxD4 */
96                             <RZA2_PINMUX(PORT9, 1, 4)>; /* RxD4 */
97            };
98    };
99