1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/pinctrl/sophgo,cv1800-pinctrl.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Sophgo CV1800 Pin Controller
8
9 maintainers:
10 - Inochi Amaoto <inochiama@outlook.com>
11
12 properties:
13 compatible:
14 enum:
15 - sophgo,cv1800b-pinctrl
16 - sophgo,cv1812h-pinctrl
17 - sophgo,sg2000-pinctrl
18 - sophgo,sg2002-pinctrl
19
20 reg:
21 items:
22 - description: pinctrl for system domain
23 - description: pinctrl for rtc domain
24
25 reg-names:
26 items:
27 - const: sys
28 - const: rtc
29
30 resets:
31 maxItems: 1
32
33 patternProperties:
34 '-cfg$':
35 type: object
36 description:
37 A pinctrl node should contain at least one subnode representing the
38 pinctrl groups available on the machine.
39
40 additionalProperties: false
41
42 patternProperties:
43 '-pins$':
44 type: object
45 description: |
46 Each subnode will list the pins it needs, and how they should
47 be configured, with regard to muxer configuration, bias, input
48 enable/disable, input schmitt trigger, slew-rate, drive strength
49 and bus hold state. In addition, all pins in the same subnode
50 should have the same power domain. For configuration detail,
51 refer to https://github.com/sophgo/sophgo-doc/.
52
53 allOf:
54 - $ref: pincfg-node.yaml#
55 - $ref: pinmux-node.yaml#
56
57 properties:
58 pinmux:
59 description: |
60 The list of GPIOs and their mux settings that properties in the
61 node apply to. This should be set using the GPIOMUX or GPIOMUX2
62 macro.
63
64 bias-pull-up:
65 type: boolean
66
67 bias-pull-down:
68 type: boolean
69
70 drive-strength-microamp:
71 description: typical current when output high level.
72
73 input-schmitt-microvolt:
74 description: typical threshold for schmitt trigger.
75
76 power-source:
77 description: power supplies at X mV.
78 enum: [ 1800, 3300 ]
79
80 slew-rate:
81 description: slew rate for output buffer (0 is fast, 1 is slow)
82 enum: [ 0, 1 ]
83
84 bias-bus-hold: true
85
86 required:
87 - pinmux
88 - power-source
89
90 additionalProperties: false
91
92 required:
93 - compatible
94 - reg
95 - reg-names
96
97 additionalProperties: false
98
99 examples:
100 - |
101 #include <dt-bindings/pinctrl/pinctrl-cv1800b.h>
102
103 pinctrl@3001000 {
104 compatible = "sophgo,cv1800b-pinctrl";
105 reg = <0x03001000 0x1000>,
106 <0x05027000 0x1000>;
107 reg-names = "sys", "rtc";
108
109 uart0_cfg: uart0-cfg {
110 uart0-pins {
111 pinmux = <PINMUX(PIN_UART0_TX, 0)>,
112 <PINMUX(PIN_UART0_RX, 0)>;
113 bias-pull-up;
114 drive-strength-microamp = <10800>;
115 input-schmitt-microvolt = <0>;
116 power-source = <3300>;
117 slew-rate = <0>;
118 };
119 };
120 };
121
122 ...
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