xref: /linux/Documentation/devicetree/bindings/pinctrl/canaan,k210-fpioa.yaml (revision 83970cd63b9f864525761137b500113ab0b49c94) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/pinctrl/canaan,k210-fpioa.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Canaan Kendryte K210 FPIOA Device Tree Bindings
8
9maintainers:
10  - Damien Le Moal <damien.lemoal@wdc.com>
11
12description:
13  The Canaan Kendryte K210 SoC Fully Programmable IO Array (FPIOA)
14  controller allows assiging any of 256 possible functions to any of
15  48 IO pins of the SoC. Pin function configuration is performed on
16  a per-pin basis.
17
18properties:
19  compatible:
20    const: canaan,k210-fpioa
21
22  reg:
23    maxItems: 1
24    description:
25      Address and length of the register set for the FPIOA controller.
26
27  clocks:
28    items:
29      - description: Controller reference clock source
30      - description: APB interface clock source
31
32  clock-names:
33    items:
34      - const: ref
35      - const: pclk
36
37  resets:
38    maxItems: 1
39
40  canaan,k210-sysctl-power:
41    $ref: /schemas/types.yaml#/definitions/phandle-array
42    items:
43      - items:
44          - description: phandle of the K210 system controller node
45          - description: offset of its power domain control register
46    description: |
47      phandle of the K210 system controller node and offset of its
48      power domain control register.
49
50patternProperties:
51  '-pinmux$':
52    type: object
53    $ref: /schemas/pinctrl/pinmux-node.yaml
54    description:
55      FPIOA client devices use sub-nodes to define the desired pin
56      configuration. Client device sub-nodes use the pinux property
57      below.
58
59    properties:
60      pinmux:
61        description:
62          List of IO pins alternate functions. The values for each IO
63          pin is a combination of an IO pin number (0 to 47) with the
64          desired function for the IO pin. Functions are defined as
65          macros in include/dt-bindings/pinctrl/k210-fpioa.h.
66          The K210_FPIOA(IO pin, function) macro is provided to
67          facilitate the combination of IO pin numbers and functions.
68
69    required:
70      - pinmux
71
72    additionalProperties: false
73
74  '-pins$':
75    type: object
76    $ref: /schemas/pinctrl/pincfg-node.yaml
77    description:
78      FPIOA client devices use sub-nodes to define the desired
79      configuration of pins. Client device sub-nodes use the
80      properties below.
81
82    properties:
83      pins:
84        description:
85          List of IO pins affected by the properties specified in this
86          subnode. IO pins are identified using the pin names "IO_xx".
87          Pin configuration nodes can also define the power domain to
88          be used for the SoC pin groups A0 (IO pins 0-5),
89          A1 (IO pins 6-11), A2 (IO pins 12-17), B0 (IO pins 18-23),
90          B1 (IO pins 24-29), B2 (IO pins 30-35), B3 (IO pins 30-35),
91          C0 (IO pins 36-41) and C1 (IO pins 42-47) using the
92          power-source property.
93        items:
94          anyOf:
95            - pattern: "^(IO_([0-9]*))|(A[0-2])|(B[3-5])|(C[6-7])$"
96            - enum: [ IO_0, IO_1, IO_2, IO_3, IO_4, IO_5, IO_6, IO_7,
97                      IO_8, IO_9, IO_10, IO_11, IO_12, IO_13, IO_14,
98                      IO_15, IO_16, IO_17, IO_18, IO_19, IO_20, IO_21,
99                      IO_22, IO_23, IO_24, IO_25, IO_26, IO_27, IO_28,
100                      IO_29, IO_30, IO_31, IO_32, IO_33, IO_34, IO_35,
101                      IO_36, IO_37, IO_38, IO_39, IO_40, IO_41, IO_42,
102                      IO_43, IO_44, IO_45, IO_46, IO_47,
103                      A0, A1, A2, B3, B4, B5, C6, C7 ]
104      bias-disable: true
105
106      bias-pull-down: true
107
108      bias-pull-up: true
109
110      drive-strength: true
111
112      drive-strength-microamp: true
113
114      input-enable: true
115
116      input-disable: true
117
118      input-schmitt-enable: true
119
120      input-schmitt-disable: true
121
122      input-polarity-invert:
123        description:
124          Enable or disable pin input polarity inversion.
125
126      output-enable: true
127
128      output-disable: true
129
130      output-high: true
131
132      output-low: true
133
134      output-polarity-invert:
135        description:
136          Enable or disable pin output polarity inversion.
137
138      slew-rate: true
139
140      power-source: true
141
142    additionalProperties: false
143
144allOf:
145  - $ref: "pinctrl.yaml#"
146
147required:
148  - compatible
149  - reg
150  - clocks
151  - canaan,k210-sysctl-power
152
153additionalProperties: false
154
155examples:
156  - |
157    #include <dt-bindings/pinctrl/k210-fpioa.h>
158    #include <dt-bindings/clock/k210-clk.h>
159    #include <dt-bindings/reset/k210-rst.h>
160
161    fpioa: pinmux@502b0000 {
162      compatible = "canaan,k210-fpioa";
163      reg = <0x502b0000 0x100>;
164      clocks = <&sysclk K210_CLK_FPIOA>,
165               <&sysclk K210_CLK_APB0>;
166      clock-names = "ref", "pclk";
167      resets = <&sysrst K210_RST_FPIOA>;
168      canaan,k210-sysctl-power = <&sysctl 108>;
169      pinctrl-0 = <&jtag_pinctrl>;
170      pinctrl-names = "default";
171
172      jtag_pinctrl: jtag-pinmux {
173        pinmux = <K210_FPIOA(0, K210_PCF_JTAG_TCLK)>,
174                 <K210_FPIOA(1, K210_PCF_JTAG_TDI)>,
175                 <K210_FPIOA(2, K210_PCF_JTAG_TMS)>,
176                 <K210_FPIOA(3, K210_PCF_JTAG_TDO)>;
177      };
178    };
179