xref: /linux/Documentation/devicetree/bindings/i2c/i2c-exynos5.yaml (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80) 
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              - google,gs101-hsi2c
37              - samsung,exynos850-hsi2c
38          - const: samsung,exynosautov9-hsi2c
39      - const: samsung,exynos5-hsi2c    # Exynos5250 and Exynos5420
40        deprecated: true
41
42  reg:
43    maxItems: 1
44
45  interrupts:
46    maxItems: 1
47
48  clock-frequency:
49    default: 100000
50    description:
51      Desired operating frequency in Hz of the bus.
52
53      If not specified, the bus operates in fast-speed mode at 100kHz.
54
55      If specified, the bus operates in high-speed mode only if the
56      clock-frequency is >= 1MHz.
57
58  clocks:
59    minItems: 1
60    items:
61      - description: I2C operating clock
62      - description: Bus clock (APB)
63
64  clock-names:
65    minItems: 1
66    items:
67      - const: hsi2c
68      - const: hsi2c_pclk
69
70required:
71  - compatible
72  - reg
73  - interrupts
74  - clocks
75
76allOf:
77  - $ref: /schemas/i2c/i2c-controller.yaml#
78  - if:
79      properties:
80        compatible:
81          contains:
82            enum:
83              - samsung,exynosautov9-hsi2c
84
85    then:
86      properties:
87        clocks:
88          minItems: 2
89
90        clock-names:
91          minItems: 2
92
93      required:
94        - clock-names
95
96    else:
97      properties:
98        clocks:
99          maxItems: 1
100
101unevaluatedProperties: false
102
103examples:
104  - |
105    #include <dt-bindings/clock/exynos5420.h>
106    #include <dt-bindings/interrupt-controller/arm-gic.h>
107    #include <dt-bindings/interrupt-controller/irq.h>
108
109    hsi2c_8: i2c@12e00000 {
110        compatible = "samsung,exynos5250-hsi2c";
111        reg = <0x12e00000 0x1000>;
112        interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
113        #address-cells = <1>;
114        #size-cells = <0>;
115        clock-frequency = <100000>;
116        clocks = <&clock CLK_USI4>;
117        clock-names = "hsi2c";
118
119        pmic@66 {
120            /* compatible = "samsung,s2mps11-pmic"; */
121            reg = <0x66>;
122        };
123    };
124
125  - |
126    #include <dt-bindings/clock/exynos850.h>
127    #include <dt-bindings/interrupt-controller/arm-gic.h>
128
129    hsi2c_2: i2c@138c0000 {
130        compatible = "samsung,exynosautov9-hsi2c";
131        reg = <0x138c0000 0xc0>;
132        interrupts = <GIC_SPI 195 IRQ_TYPE_LEVEL_HIGH>;
133        #address-cells = <1>;
134        #size-cells = <0>;
135        clocks = <&cmu_peri CLK_GOUT_HSI2C2_IPCLK>,
136                 <&cmu_peri CLK_GOUT_HSI2C2_PCLK>;
137        clock-names = "hsi2c", "hsi2c_pclk";
138
139        pmic@66 {
140            /* compatible = "samsung,s2mps11-pmic"; */
141            reg = <0x66>;
142        };
143    };
144