xref: /linux/Documentation/devicetree/bindings/i2c/i2c-exynos5.yaml (revision cf79f291f985662150363b4a93d16f88f12643bc) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/i2c/i2c-exynos5.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Samsung's High Speed I2C controller
8
9maintainers:
10  - Krzysztof Kozlowski <krzk@kernel.org>
11
12description: |
13  The Samsung's High Speed I2C controller is used to interface with I2C devices
14  at various speeds ranging from 100kHz to 3.4MHz.
15
16  In case the HSI2C controller is encapsulated within USI block (it's the case
17  e.g. for Exynos850 and Exynos Auto V9 SoCs), it might be also necessary to
18  define USI node in device tree file, choosing "i2c" configuration. Please see
19  Documentation/devicetree/bindings/soc/samsung/exynos-usi.yaml for details.
20
21properties:
22  compatible:
23    oneOf:
24      - enum:
25          - samsung,exynos5250-hsi2c    # Exynos5250 and Exynos5420
26          - samsung,exynos5260-hsi2c    # Exynos5260
27          - samsung,exynos7-hsi2c       # Exynos7
28          - samsung,exynosautov9-hsi2c
29      - items:
30          - enum:
31              - samsung,exynos5433-hsi2c
32              - tesla,fsd-hsi2c
33          - const: samsung,exynos7-hsi2c
34      - items:
35          - enum:
36              - samsung,exynos850-hsi2c
37          - const: samsung,exynosautov9-hsi2c
38      - const: samsung,exynos5-hsi2c    # Exynos5250 and Exynos5420
39        deprecated: true
40
41  reg:
42    maxItems: 1
43
44  interrupts:
45    maxItems: 1
46
47  clock-frequency:
48    default: 100000
49    description:
50      Desired operating frequency in Hz of the bus.
51
52      If not specified, the bus operates in fast-speed mode at 100kHz.
53
54      If specified, the bus operates in high-speed mode only if the
55      clock-frequency is >= 1MHz.
56
57  clocks:
58    minItems: 1
59    items:
60      - description: I2C operating clock
61      - description: Bus clock (APB)
62
63  clock-names:
64    minItems: 1
65    items:
66      - const: hsi2c
67      - const: hsi2c_pclk
68
69required:
70  - compatible
71  - reg
72  - interrupts
73  - clocks
74
75allOf:
76  - $ref: /schemas/i2c/i2c-controller.yaml#
77  - if:
78      properties:
79        compatible:
80          contains:
81            enum:
82              - samsung,exynosautov9-hsi2c
83
84    then:
85      properties:
86        clocks:
87          minItems: 2
88
89        clock-names:
90          minItems: 2
91
92      required:
93        - clock-names
94
95    else:
96      properties:
97        clocks:
98          maxItems: 1
99
100unevaluatedProperties: false
101
102examples:
103  - |
104    #include <dt-bindings/clock/exynos5420.h>
105    #include <dt-bindings/interrupt-controller/arm-gic.h>
106    #include <dt-bindings/interrupt-controller/irq.h>
107
108    hsi2c_8: i2c@12e00000 {
109        compatible = "samsung,exynos5250-hsi2c";
110        reg = <0x12e00000 0x1000>;
111        interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
112        #address-cells = <1>;
113        #size-cells = <0>;
114        clock-frequency = <100000>;
115        clocks = <&clock CLK_USI4>;
116        clock-names = "hsi2c";
117
118        pmic@66 {
119            /* compatible = "samsung,s2mps11-pmic"; */
120            reg = <0x66>;
121        };
122    };
123
124  - |
125    #include <dt-bindings/clock/exynos850.h>
126    #include <dt-bindings/interrupt-controller/arm-gic.h>
127
128    hsi2c_2: i2c@138c0000 {
129        compatible = "samsung,exynosautov9-hsi2c";
130        reg = <0x138c0000 0xc0>;
131        interrupts = <GIC_SPI 195 IRQ_TYPE_LEVEL_HIGH>;
132        #address-cells = <1>;
133        #size-cells = <0>;
134        clocks = <&cmu_peri CLK_GOUT_HSI2C2_IPCLK>,
135                 <&cmu_peri CLK_GOUT_HSI2C2_PCLK>;
136        clock-names = "hsi2c", "hsi2c_pclk";
137
138        pmic@66 {
139            /* compatible = "samsung,s2mps11-pmic"; */
140            reg = <0x66>;
141        };
142    };
143