1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/pinctrl/cypress,cy8c95x0.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Cypress CY8C95X0 I2C GPIO expander
8
9 maintainers:
10 - Patrick Rudolph <patrick.rudolph@9elements.com>
11
12 description: |
13 This supports the 20/40/60 pin Cypress CYC95x0 GPIO I2C expanders.
14 Pin function configuration is performed on a per-pin basis.
15
16 properties:
17 compatible:
18 enum:
19 - cypress,cy8c9520
20 - cypress,cy8c9540
21 - cypress,cy8c9560
22
23 reg:
24 maxItems: 1
25
26 gpio-controller: true
27
28 '#gpio-cells':
29 description:
30 The first cell is the GPIO number and the second cell specifies GPIO
31 flags, as defined in <dt-bindings/gpio/gpio.h>.
32 const: 2
33
34 interrupts:
35 maxItems: 1
36
37 interrupt-controller: true
38
39 '#interrupt-cells':
40 const: 2
41
42 gpio-line-names: true
43
44 gpio-ranges:
45 maxItems: 1
46
47 gpio-reserved-ranges:
48 minItems: 1
49 maxItems: 60
50
51 vdd-supply:
52 description:
53 Optional power supply.
54
55 reset-gpios:
56 description: GPIO connected to the XRES pin
57 maxItems: 1
58
59 patternProperties:
60 '-pins$':
61 type: object
62 description:
63 Pinctrl node's client devices use subnodes for desired pin configuration.
64 Client device subnodes use below standard properties.
65 $ref: pincfg-node.yaml#
66
67 properties:
68 pins:
69 description:
70 List of gpio pins affected by the properties specified in this
71 subnode.
72 items:
73 pattern: '^gp([0-7][0-7])$'
74 minItems: 1
75 maxItems: 60
76
77 function:
78 description:
79 Specify the alternative function to be configured for the specified
80 pins.
81 enum: [ gpio, pwm ]
82
83 bias-pull-down: true
84
85 bias-pull-up: true
86
87 bias-disable: true
88
89 input-enable: true
90
91 output-high: true
92
93 output-low: true
94
95 drive-push-pull: true
96
97 drive-open-drain: true
98
99 drive-open-source: true
100
101 required:
102 - pins
103 - function
104
105 additionalProperties: false
106
107 required:
108 - compatible
109 - reg
110 - interrupts
111 - interrupt-controller
112 - '#interrupt-cells'
113 - gpio-controller
114 - '#gpio-cells'
115
116 additionalProperties: false
117
118 allOf:
119 - $ref: pinctrl.yaml#
120
121 examples:
122 - |
123 #include <dt-bindings/interrupt-controller/arm-gic.h>
124 #include <dt-bindings/interrupt-controller/irq.h>
125
126 i2c {
127 #address-cells = <1>;
128 #size-cells = <0>;
129
130 pinctrl@20 {
131 compatible = "cypress,cy8c9520";
132 reg = <0x20>;
133 gpio-controller;
134 #gpio-cells = <2>;
135 #interrupt-cells = <2>;
136 interrupts = <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>;
137 interrupt-controller;
138 vdd-supply = <&p3v3>;
139 gpio-reserved-ranges = <1 2>, <6 1>, <10 1>, <15 1>;
140
141 pinctrl-0 = <&U62160_pins>, <&U62160_ipins>;
142 pinctrl-names = "default";
143
144 U62160_pins: cfg-pins {
145 pins = "gp03", "gp16", "gp20", "gp50", "gp51";
146 function = "gpio";
147 input-enable;
148 bias-pull-up;
149 };
150
151 U62160_ipins: icfg-pins {
152 pins = "gp04", "gp17", "gp21", "gp52", "gp53";
153 function = "gpio";
154 input-enable;
155 bias-pull-up;
156 };
157 };
158 };
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