1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/i2c/renesas,rmobile-iic.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Renesas R-Mobile I2C Bus Interface (IIC)
8
9 maintainers:
10 - Wolfram Sang <wsa+renesas@sang-engineering.com>
11
12 properties:
13 compatible:
14 oneOf:
15 - items:
16 - enum:
17 - renesas,iic-r8a73a4 # R-Mobile APE6
18 - renesas,iic-r8a7740 # R-Mobile A1
19 - renesas,iic-sh73a0 # SH-Mobile AG5
20 - const: renesas,rmobile-iic # Generic
21
22 - items:
23 - enum:
24 - renesas,iic-r8a7742 # RZ/G1H
25 - renesas,iic-r8a7743 # RZ/G1M
26 - renesas,iic-r8a7744 # RZ/G1N
27 - renesas,iic-r8a7745 # RZ/G1E
28 - renesas,iic-r8a7790 # R-Car H2
29 - renesas,iic-r8a7791 # R-Car M2-W
30 - renesas,iic-r8a7792 # R-Car V2H
31 - renesas,iic-r8a7793 # R-Car M2-N
32 - renesas,iic-r8a7794 # R-Car E2
33 - const: renesas,rcar-gen2-iic # R-Car Gen2 and RZ/G1
34 - const: renesas,rmobile-iic # Generic
35
36 - items:
37 - enum:
38 - renesas,iic-r8a774a1 # RZ/G2M
39 - renesas,iic-r8a774b1 # RZ/G2N
40 - renesas,iic-r8a774c0 # RZ/G2E
41 - renesas,iic-r8a774e1 # RZ/G2H
42 - renesas,iic-r8a7795 # R-Car H3
43 - renesas,iic-r8a7796 # R-Car M3-W
44 - renesas,iic-r8a77961 # R-Car M3-W+
45 - renesas,iic-r8a77965 # R-Car M3-N
46 - renesas,iic-r8a77990 # R-Car E3
47 - const: renesas,rcar-gen3-iic # R-Car Gen3 and RZ/G2
48 - const: renesas,rmobile-iic # Generic
49
50 reg:
51 maxItems: 1
52
53 interrupts: true
54
55 clock-frequency:
56 description:
57 Desired I2C bus clock frequency in Hz. The absence of this property
58 indicates the default frequency 100 kHz.
59
60 clocks:
61 maxItems: 1
62
63 power-domains:
64 maxItems: 1
65
66 resets:
67 maxItems: 1
68
69 dmas:
70 minItems: 2
71 maxItems: 4
72 description:
73 Must contain a list of pairs of references to DMA specifiers, one for
74 transmission, and one for reception.
75
76 dma-names:
77 minItems: 2
78 maxItems: 4
79 items:
80 enum:
81 - tx
82 - rx
83
84 required:
85 - compatible
86 - reg
87 - interrupts
88 - clocks
89 - power-domains
90 - '#address-cells'
91 - '#size-cells'
92
93 allOf:
94 - $ref: /schemas/i2c/i2c-controller.yaml#
95
96 - if:
97 properties:
98 compatible:
99 contains:
100 enum:
101 - renesas,iic-r8a7740
102 - renesas,iic-sh73a0
103 then:
104 properties:
105 interrupts:
106 items:
107 - description: Arbitration Lost Interrupt (ALI)
108 - description: Non-acknowledge Detection Interrupt (TACKI)
109 - description: Wait Interrupt (WAITI)
110 - description: Data Transmit Enable interrupt (DTEI)
111 else:
112 properties:
113 interrupts:
114 items:
115 - description: Single combined interrupt
116
117 - if:
118 properties:
119 compatible:
120 contains:
121 enum:
122 - renesas,rcar-gen2-iic
123 - renesas,rcar-gen3-iic
124 then:
125 required:
126 - resets
127
128 unevaluatedProperties: false
129
130 examples:
131 - |
132 #include <dt-bindings/clock/r8a7790-cpg-mssr.h>
133 #include <dt-bindings/interrupt-controller/arm-gic.h>
134 #include <dt-bindings/power/r8a7790-sysc.h>
135
136 iic0: i2c@e6500000 {
137 compatible = "renesas,iic-r8a7790", "renesas,rcar-gen2-iic",
138 "renesas,rmobile-iic";
139 reg = <0xe6500000 0x425>;
140 interrupts = <GIC_SPI 174 IRQ_TYPE_LEVEL_HIGH>;
141 clocks = <&cpg CPG_MOD 318>;
142 clock-frequency = <400000>;
143 dmas = <&dmac0 0x61>, <&dmac0 0x62>, <&dmac1 0x61>, <&dmac1 0x62>;
144 dma-names = "tx", "rx", "tx", "rx";
145 power-domains = <&sysc R8A7790_PD_ALWAYS_ON>;
146 resets = <&cpg 318>;
147 #address-cells = <1>;
148 #size-cells = <0>;
149 };
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