xref: /linux/Documentation/devicetree/bindings/pinctrl/brcm,ns-pinmux.yaml (revision 49cd1dd15f74d73d4752b2c4f23f99b0753d2b3d) 
1# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/pinctrl/brcm,ns-pinmux.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Broadcom Northstar pins mux controller
8
9maintainers:
10  - Rafał Miłecki <rafal@milecki.pl>
11
12description:
13  Some of Northstar SoCs's pins can be used for various purposes thanks to the
14  mux controller. This binding allows describing mux controller and listing
15  available functions. They can be referenced later by other bindings to let
16  system configure controller correctly.
17
18  A list of pins varies across chipsets so few bindings are available.
19
20properties:
21  compatible:
22    enum:
23      - brcm,bcm4708-pinmux
24      - brcm,bcm4709-pinmux
25      - brcm,bcm53012-pinmux
26
27  reg:
28    maxItems: 1
29
30  reg-names:
31    const: cru_gpio_control
32
33patternProperties:
34  '-pins$':
35    type: object
36    description: pin node
37    $ref: pinmux-node.yaml#
38
39    properties:
40      function:
41        enum: [ spi, i2c, pwm, uart1, mdio, uart2, sdio ]
42      groups:
43        minItems: 1
44        maxItems: 4
45        items:
46          enum: [ spi_grp, i2c_grp, pwm0_grp, pwm1_grp, pwm2_grp, pwm3_grp,
47                  uart1_grp, mdio_grp, uart2_grp, sdio_pwr_grp, sdio_1p8v_grp ]
48
49    required:
50      - function
51      - groups
52
53    additionalProperties: false
54
55allOf:
56  - $ref: pinctrl.yaml#
57  - if:
58      properties:
59        compatible:
60          contains:
61            const: brcm,bcm4708-pinmux
62    then:
63      patternProperties:
64        '-pins$':
65          properties:
66            function:
67              enum: [ spi, i2c, pwm, uart1 ]
68            groups:
69              items:
70                enum: [ spi_grp, i2c_grp, pwm0_grp, pwm1_grp, pwm2_grp, pwm3_grp,
71                        uart1_grp ]
72
73required:
74  - reg
75  - reg-names
76
77additionalProperties: false
78
79examples:
80  - |
81    pinctrl@1800c1c0 {
82        compatible = "brcm,bcm4708-pinmux";
83        reg = <0x1800c1c0 0x24>;
84        reg-names = "cru_gpio_control";
85
86        spi-pins {
87            function = "spi";
88            groups = "spi_grp";
89        };
90    };
91