xref: /linux/Documentation/devicetree/bindings/net/nfc/marvell,nci.yaml (revision 24bce201d79807b668bf9d9e0aca801c5c0d5f78) 
1# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/net/nfc/marvell,nci.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Marvell International Ltd. NCI NFC controller
8
9maintainers:
10  - Krzysztof Kozlowski <krzk@kernel.org>
11
12properties:
13  compatible:
14    enum:
15      - marvell,nfc-i2c
16      - marvell,nfc-spi
17      - marvell,nfc-uart
18
19  hci-muxed:
20    type: boolean
21    description: |
22      Specifies that the chip is muxing NCI over HCI frames
23
24  interrupts:
25    maxItems: 1
26
27  reg:
28    maxItems: 1
29
30  reset-n-io:
31    $ref: "/schemas/types.yaml#/definitions/phandle-array"
32    maxItems: 1
33    description: |
34      Output GPIO pin used to reset the chip (active low)
35
36  i2c-int-falling:
37    type: boolean
38    description: |
39      For I2C type of connection. Specifies that the chip read event shall be
40      trigged on falling edge.
41
42  i2c-int-rising:
43    type: boolean
44    description: |
45      For I2C type of connection.  Specifies that the chip read event shall be
46      trigged on rising edge.
47
48  break-control:
49    type: boolean
50    description: |
51      For UART type of connection. Specifies that the chip needs specific break
52      management.
53
54  flow-control:
55    type: boolean
56    description: |
57      For UART type of connection. Specifies that the chip is using RTS/CTS.
58
59  spi-cpha: true
60  spi-cpol: true
61  spi-max-frequency: true
62
63required:
64  - compatible
65
66allOf:
67  - if:
68      properties:
69        compatible:
70          contains:
71            const: marvell,nfc-i2c
72    then:
73      properties:
74        break-control: false
75        flow-control: false
76        spi-cpha: false
77        spi-cpol: false
78        spi-max-frequency: false
79      required:
80        - reg
81
82  - if:
83      properties:
84        compatible:
85          contains:
86            const: marvell,nfc-spi
87    then:
88      properties:
89        break-control: false
90        flow-control: false
91        i2c-int-falling: false
92        i2c-int-rising: false
93      required:
94        - reg
95
96  - if:
97      properties:
98        compatible:
99          contains:
100            const: marvell,nfc-uart
101    then:
102      properties:
103        i2c-int-falling: false
104        i2c-int-rising: false
105        interrupts: false
106        spi-cpha: false
107        spi-cpol: false
108        spi-max-frequency: false
109        reg: false
110
111additionalProperties: false
112
113examples:
114  - |
115    #include <dt-bindings/gpio/gpio.h>
116    #include <dt-bindings/interrupt-controller/irq.h>
117
118    i2c {
119        #address-cells = <1>;
120        #size-cells = <0>;
121
122        nfc@8 {
123            compatible = "marvell,nfc-i2c";
124            reg = <0x8>;
125
126            interrupt-parent = <&gpio3>;
127            interrupts = <21 IRQ_TYPE_EDGE_RISING>;
128
129            i2c-int-rising;
130
131            reset-n-io = <&gpio3 19 GPIO_ACTIVE_HIGH>;
132        };
133    };
134
135  - |
136    #include <dt-bindings/gpio/gpio.h>
137    #include <dt-bindings/interrupt-controller/irq.h>
138
139    spi {
140        #address-cells = <1>;
141        #size-cells = <0>;
142
143        nfc@0 {
144            compatible = "marvell,nfc-spi";
145            reg = <0>;
146
147            spi-max-frequency = <3000000>;
148            spi-cpha;
149            spi-cpol;
150
151            interrupt-parent = <&gpio1>;
152            interrupts = <17 IRQ_TYPE_EDGE_RISING>;
153
154            reset-n-io = <&gpio3 19 GPIO_ACTIVE_HIGH>;
155        };
156    };
157
158  - |
159    #include <dt-bindings/gpio/gpio.h>
160
161    uart {
162        nfc {
163            compatible = "marvell,nfc-uart";
164
165            reset-n-io = <&gpio3 16 GPIO_ACTIVE_HIGH>;
166
167            hci-muxed;
168            flow-control;
169        };
170    };
171