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 <<
50 <<
51 - items: <<
52 - enum: <<
53 - renesas,i2c-r8a779a0 # R-C 49 - renesas,i2c-r8a779a0 # R-Car V3U
54 - renesas,i2c-r8a779f0 # R-C !! 50 - const: renesas,rcar-gen3-i2c # R-Car Gen3 and RZ/G2
55 - renesas,i2c-r8a779g0 # R-C <<
56 - renesas,i2c-r8a779h0 # R-C <<
57 - const: renesas,rcar-gen4-i2c # R-C <<
58 51
59 reg: 52 reg:
60 maxItems: 1 53 maxItems: 1
61 54
62 interrupts: 55 interrupts:
63 maxItems: 1 56 maxItems: 1
64 57
65 clock-frequency: 58 clock-frequency:
66 description: 59 description:
67 Desired I2C bus clock frequency in Hz. T 60 Desired I2C bus clock frequency in Hz. The absence of this property
68 indicates the default frequency 100 kHz. 61 indicates the default frequency 100 kHz.
69 62
70 clocks: 63 clocks:
71 maxItems: 1 64 maxItems: 1
72 65
73 power-domains: 66 power-domains:
74 maxItems: 1 67 maxItems: 1
75 68
76 resets: 69 resets:
77 maxItems: 1 70 maxItems: 1
78 71
79 dmas: 72 dmas:
80 minItems: 2 73 minItems: 2
81 maxItems: 4 74 maxItems: 4
82 description: 75 description:
83 Must contain a list of pairs of referenc 76 Must contain a list of pairs of references to DMA specifiers, one for
84 transmission, and one for reception. 77 transmission, and one for reception.
85 78
86 dma-names: 79 dma-names:
87 minItems: 2 80 minItems: 2
88 maxItems: 4 81 maxItems: 4
89 items: 82 items:
90 enum: 83 enum:
91 - tx 84 - tx
92 - rx 85 - rx
93 86
94 i2c-scl-falling-time-ns: 87 i2c-scl-falling-time-ns:
95 default: 35 88 default: 35
96 description: 89 description:
97 Number of nanoseconds the SCL signal tak 90 Number of nanoseconds the SCL signal takes to fall; t(f) in the I2C
98 specification. 91 specification.
99 92
100 i2c-scl-internal-delay-ns: 93 i2c-scl-internal-delay-ns:
101 default: 50 94 default: 50
102 description: 95 description:
103 Number of nanoseconds the IP core additi 96 Number of nanoseconds the IP core additionally needs to setup SCL.
104 97
105 i2c-scl-rising-time-ns: 98 i2c-scl-rising-time-ns:
106 default: 200 99 default: 200
107 description: 100 description:
108 Number of nanoseconds the SCL signal tak 101 Number of nanoseconds the SCL signal takes to rise; t(r) in the I2C
109 specification. 102 specification.
110 103
111 required: 104 required:
112 - compatible 105 - compatible
113 - reg 106 - reg
114 - interrupts 107 - interrupts
115 - clocks 108 - clocks
116 - power-domains 109 - power-domains
117 - '#address-cells' 110 - '#address-cells'
118 - '#size-cells' 111 - '#size-cells'
119 112
120 allOf: 113 allOf:
121 - $ref: /schemas/i2c/i2c-controller.yaml# 114 - $ref: /schemas/i2c/i2c-controller.yaml#
122 115
123 - if: 116 - if:
124 properties: 117 properties:
125 compatible: 118 compatible:
126 contains: 119 contains:
127 enum: 120 enum:
128 - renesas,rcar-gen1-i2c 121 - renesas,rcar-gen1-i2c
129 - renesas,rcar-gen2-i2c 122 - renesas,rcar-gen2-i2c
130 then: 123 then:
131 properties: 124 properties:
132 dmas: false 125 dmas: false
133 dma-names: false 126 dma-names: false
134 127
135 - if: 128 - if:
136 properties: 129 properties:
137 compatible: 130 compatible:
138 contains: 131 contains:
139 enum: 132 enum:
140 - renesas,rcar-gen2-i2c 133 - renesas,rcar-gen2-i2c
141 - renesas,rcar-gen3-i2c 134 - renesas,rcar-gen3-i2c
142 - renesas,rcar-gen4-i2c <<
143 then: 135 then:
144 required: 136 required:
145 - resets 137 - resets
146 138
147 unevaluatedProperties: false 139 unevaluatedProperties: false
148 140
149 examples: 141 examples:
150 - | 142 - |
151 #include <dt-bindings/clock/r8a7791-cpg-ms 143 #include <dt-bindings/clock/r8a7791-cpg-mssr.h>
152 #include <dt-bindings/interrupt-controller 144 #include <dt-bindings/interrupt-controller/arm-gic.h>
153 #include <dt-bindings/power/r8a7791-sysc.h 145 #include <dt-bindings/power/r8a7791-sysc.h>
154 146
155 i2c0: i2c@e6508000 { 147 i2c0: i2c@e6508000 {
156 compatible = "renesas,i2c-r8a7791", "r !! 148 #address-cells = <1>;
157 reg = <0xe6508000 0x40>; !! 149 #size-cells = <0>;
158 interrupts = <GIC_SPI 287 IRQ_TYPE_LEV !! 150 compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c";
159 clock-frequency = <400000>; !! 151 reg = <0xe6508000 0x40>;
160 clocks = <&cpg CPG_MOD 931>; !! 152 interrupts = <GIC_SPI 287 IRQ_TYPE_LEVEL_HIGH>;
161 power-domains = <&sysc R8A7791_PD_ALWA !! 153 clock-frequency = <400000>;
162 resets = <&cpg 931>; !! 154 clocks = <&cpg CPG_MOD 931>;
163 i2c-scl-internal-delay-ns = <6>; !! 155 power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
164 #address-cells = <1>; !! 156 resets = <&cpg 931>;
165 #size-cells = <0>; !! 157 i2c-scl-internal-delay-ns = <6>;
166 }; 158 };
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