1 # SPDX-License-Identifier: (GPL-2.0-only OR BS 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2 2 %YAML 1.2
3 --- 3 ---
4 $id: http://devicetree.org/schemas/i2c/renesas 4 $id: http://devicetree.org/schemas/i2c/renesas,rcar-i2c.yaml#
5 $schema: http://devicetree.org/meta-schemas/co 5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6 6
7 title: Renesas R-Car I2C Controller 7 title: Renesas R-Car I2C Controller
8 8
9 maintainers: 9 maintainers:
10 - Wolfram Sang <wsa+renesas@sang-engineering. 10 - Wolfram Sang <wsa+renesas@sang-engineering.com>
11 11
12 properties: 12 properties:
13 compatible: 13 compatible:
14 oneOf: 14 oneOf:
15 - items: 15 - items:
16 - enum: 16 - enum:
17 - renesas,i2c-r8a7778 # R-C 17 - renesas,i2c-r8a7778 # R-Car M1A
18 - renesas,i2c-r8a7779 # R-C 18 - renesas,i2c-r8a7779 # R-Car H1
19 - const: renesas,rcar-gen1-i2c # R-C 19 - const: renesas,rcar-gen1-i2c # R-Car Gen1
20 20
21 - items: 21 - items:
22 - enum: 22 - enum:
23 - renesas,i2c-r8a7742 # RZ/ 23 - renesas,i2c-r8a7742 # RZ/G1H
24 - renesas,i2c-r8a7743 # RZ/ 24 - renesas,i2c-r8a7743 # RZ/G1M
25 - renesas,i2c-r8a7744 # RZ/ 25 - renesas,i2c-r8a7744 # RZ/G1N
26 - renesas,i2c-r8a7745 # RZ/ 26 - renesas,i2c-r8a7745 # RZ/G1E
27 - renesas,i2c-r8a77470 # RZ/ 27 - renesas,i2c-r8a77470 # RZ/G1C
28 - renesas,i2c-r8a7790 # R-C 28 - renesas,i2c-r8a7790 # R-Car H2
29 - renesas,i2c-r8a7791 # R-C 29 - renesas,i2c-r8a7791 # R-Car M2-W
30 - renesas,i2c-r8a7792 # R-C 30 - renesas,i2c-r8a7792 # R-Car V2H
31 - renesas,i2c-r8a7793 # R-C 31 - renesas,i2c-r8a7793 # R-Car M2-N
32 - renesas,i2c-r8a7794 # R-C 32 - renesas,i2c-r8a7794 # R-Car E2
33 - const: renesas,rcar-gen2-i2c # R-C 33 - const: renesas,rcar-gen2-i2c # R-Car Gen2 and RZ/G1
34 34
35 - items: 35 - items:
36 - enum: 36 - enum:
37 - renesas,i2c-r8a774a1 # RZ/ 37 - renesas,i2c-r8a774a1 # RZ/G2M
38 - renesas,i2c-r8a774b1 # RZ/ 38 - renesas,i2c-r8a774b1 # RZ/G2N
39 - renesas,i2c-r8a774c0 # RZ/ 39 - renesas,i2c-r8a774c0 # RZ/G2E
40 - renesas,i2c-r8a774e1 # RZ/ 40 - renesas,i2c-r8a774e1 # RZ/G2H
41 - renesas,i2c-r8a7795 # R-C 41 - renesas,i2c-r8a7795 # R-Car H3
42 - renesas,i2c-r8a7796 # R-C 42 - renesas,i2c-r8a7796 # R-Car M3-W
43 - renesas,i2c-r8a77961 # R-C 43 - renesas,i2c-r8a77961 # R-Car M3-W+
44 - renesas,i2c-r8a77965 # R-C 44 - renesas,i2c-r8a77965 # R-Car M3-N
45 - renesas,i2c-r8a77970 # R-C 45 - renesas,i2c-r8a77970 # R-Car V3M
46 - renesas,i2c-r8a77980 # R-C 46 - renesas,i2c-r8a77980 # R-Car V3H
47 - renesas,i2c-r8a77990 # R-C 47 - renesas,i2c-r8a77990 # R-Car E3
48 - renesas,i2c-r8a77995 # R-C 48 - renesas,i2c-r8a77995 # R-Car D3
49 - const: renesas,rcar-gen3-i2c # R-C 49 - const: renesas,rcar-gen3-i2c # R-Car Gen3 and RZ/G2
50 50
51 - items: 51 - items:
52 - enum: 52 - enum:
53 - renesas,i2c-r8a779a0 # R-C 53 - renesas,i2c-r8a779a0 # R-Car V3U
54 - renesas,i2c-r8a779f0 # R-C 54 - renesas,i2c-r8a779f0 # R-Car S4-8
55 - renesas,i2c-r8a779g0 # R-C 55 - renesas,i2c-r8a779g0 # R-Car V4H
56 - renesas,i2c-r8a779h0 # R-C 56 - renesas,i2c-r8a779h0 # R-Car V4M
57 - const: renesas,rcar-gen4-i2c # R-C 57 - const: renesas,rcar-gen4-i2c # R-Car Gen4
58 58
59 reg: 59 reg:
60 maxItems: 1 60 maxItems: 1
61 61
62 interrupts: 62 interrupts:
63 maxItems: 1 63 maxItems: 1
64 64
65 clock-frequency: 65 clock-frequency:
66 description: 66 description:
67 Desired I2C bus clock frequency in Hz. T 67 Desired I2C bus clock frequency in Hz. The absence of this property
68 indicates the default frequency 100 kHz. 68 indicates the default frequency 100 kHz.
69 69
70 clocks: 70 clocks:
71 maxItems: 1 71 maxItems: 1
72 72
73 power-domains: 73 power-domains:
74 maxItems: 1 74 maxItems: 1
75 75
76 resets: 76 resets:
77 maxItems: 1 77 maxItems: 1
78 78
79 dmas: 79 dmas:
80 minItems: 2 80 minItems: 2
81 maxItems: 4 81 maxItems: 4
82 description: 82 description:
83 Must contain a list of pairs of referenc 83 Must contain a list of pairs of references to DMA specifiers, one for
84 transmission, and one for reception. 84 transmission, and one for reception.
85 85
86 dma-names: 86 dma-names:
87 minItems: 2 87 minItems: 2
88 maxItems: 4 88 maxItems: 4
89 items: 89 items:
90 enum: 90 enum:
91 - tx 91 - tx
92 - rx 92 - rx
93 93
94 i2c-scl-falling-time-ns: 94 i2c-scl-falling-time-ns:
95 default: 35 95 default: 35
96 description: 96 description:
97 Number of nanoseconds the SCL signal tak 97 Number of nanoseconds the SCL signal takes to fall; t(f) in the I2C
98 specification. 98 specification.
99 99
100 i2c-scl-internal-delay-ns: 100 i2c-scl-internal-delay-ns:
101 default: 50 101 default: 50
102 description: 102 description:
103 Number of nanoseconds the IP core additi 103 Number of nanoseconds the IP core additionally needs to setup SCL.
104 104
105 i2c-scl-rising-time-ns: 105 i2c-scl-rising-time-ns:
106 default: 200 106 default: 200
107 description: 107 description:
108 Number of nanoseconds the SCL signal tak 108 Number of nanoseconds the SCL signal takes to rise; t(r) in the I2C
109 specification. 109 specification.
110 110
111 required: 111 required:
112 - compatible 112 - compatible
113 - reg 113 - reg
114 - interrupts 114 - interrupts
115 - clocks 115 - clocks
116 - power-domains 116 - power-domains
117 - '#address-cells' 117 - '#address-cells'
118 - '#size-cells' 118 - '#size-cells'
119 119
120 allOf: 120 allOf:
121 - $ref: /schemas/i2c/i2c-controller.yaml# 121 - $ref: /schemas/i2c/i2c-controller.yaml#
122 122
123 - if: 123 - if:
124 properties: 124 properties:
125 compatible: 125 compatible:
126 contains: 126 contains:
127 enum: 127 enum:
128 - renesas,rcar-gen1-i2c 128 - renesas,rcar-gen1-i2c
129 - renesas,rcar-gen2-i2c 129 - renesas,rcar-gen2-i2c
130 then: 130 then:
131 properties: 131 properties:
132 dmas: false 132 dmas: false
133 dma-names: false 133 dma-names: false
134 134
135 - if: 135 - if:
136 properties: 136 properties:
137 compatible: 137 compatible:
138 contains: 138 contains:
139 enum: 139 enum:
140 - renesas,rcar-gen2-i2c 140 - renesas,rcar-gen2-i2c
141 - renesas,rcar-gen3-i2c 141 - renesas,rcar-gen3-i2c
142 - renesas,rcar-gen4-i2c 142 - renesas,rcar-gen4-i2c
143 then: 143 then:
144 required: 144 required:
145 - resets 145 - resets
146 146
147 unevaluatedProperties: false 147 unevaluatedProperties: false
148 148
149 examples: 149 examples:
150 - | 150 - |
151 #include <dt-bindings/clock/r8a7791-cpg-ms 151 #include <dt-bindings/clock/r8a7791-cpg-mssr.h>
152 #include <dt-bindings/interrupt-controller 152 #include <dt-bindings/interrupt-controller/arm-gic.h>
153 #include <dt-bindings/power/r8a7791-sysc.h 153 #include <dt-bindings/power/r8a7791-sysc.h>
154 154
155 i2c0: i2c@e6508000 { 155 i2c0: i2c@e6508000 {
156 compatible = "renesas,i2c-r8a7791", "r 156 compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c";
157 reg = <0xe6508000 0x40>; 157 reg = <0xe6508000 0x40>;
158 interrupts = <GIC_SPI 287 IRQ_TYPE_LEV 158 interrupts = <GIC_SPI 287 IRQ_TYPE_LEVEL_HIGH>;
159 clock-frequency = <400000>; 159 clock-frequency = <400000>;
160 clocks = <&cpg CPG_MOD 931>; 160 clocks = <&cpg CPG_MOD 931>;
161 power-domains = <&sysc R8A7791_PD_ALWA 161 power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
162 resets = <&cpg 931>; 162 resets = <&cpg 931>;
163 i2c-scl-internal-delay-ns = <6>; 163 i2c-scl-internal-delay-ns = <6>;
164 #address-cells = <1>; 164 #address-cells = <1>;
165 #size-cells = <0>; 165 #size-cells = <0>;
166 }; 166 };
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