xref: /linux/Documentation/devicetree/bindings/i2c/i2c-exynos5.yaml (revision 30bbcb44707a97fcb62246bebc8b413b5ab293f8) 
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,exynos8895-hsi2c
29          - samsung,exynosautov9-hsi2c
30      - items:
31          - enum:
32              - samsung,exynos5433-hsi2c
33              - samsung,exynos7870-hsi2c
34              - tesla,fsd-hsi2c
35          - const: samsung,exynos7-hsi2c
36      - items:
37          - enum:
38              - samsung,exynos8890-hsi2c
39          - const: samsung,exynos8895-hsi2c
40      - items:
41          - enum:
42              - google,gs101-hsi2c
43              - samsung,exynos2200-hsi2c
44              - samsung,exynos850-hsi2c
45              - samsung,exynos990-hsi2c
46          - const: samsung,exynosautov9-hsi2c
47      - const: samsung,exynos5-hsi2c    # Exynos5250 and Exynos5420
48        deprecated: true
49
50  reg:
51    maxItems: 1
52
53  interrupts:
54    maxItems: 1
55
56  clock-frequency:
57    default: 100000
58    description:
59      Desired operating frequency in Hz of the bus.
60
61      If not specified, the bus operates in fast-speed mode at 100kHz.
62
63      If specified, the bus operates in high-speed mode only if the
64      clock-frequency is >= 1MHz.
65
66  clocks:
67    minItems: 1
68    items:
69      - description: I2C operating clock
70      - description: Bus clock (APB)
71
72  clock-names:
73    minItems: 1
74    items:
75      - const: hsi2c
76      - const: hsi2c_pclk
77
78required:
79  - compatible
80  - reg
81  - interrupts
82  - clocks
83
84allOf:
85  - $ref: /schemas/i2c/i2c-controller.yaml#
86  - if:
87      properties:
88        compatible:
89          contains:
90            enum:
91              - samsung,exynosautov9-hsi2c
92
93    then:
94      properties:
95        clocks:
96          minItems: 2
97
98        clock-names:
99          minItems: 2
100
101      required:
102        - clock-names
103
104    else:
105      properties:
106        clocks:
107          maxItems: 1
108
109unevaluatedProperties: false
110
111examples:
112  - |
113    #include <dt-bindings/clock/exynos5420.h>
114    #include <dt-bindings/interrupt-controller/arm-gic.h>
115    #include <dt-bindings/interrupt-controller/irq.h>
116
117    hsi2c_8: i2c@12e00000 {
118        compatible = "samsung,exynos5250-hsi2c";
119        reg = <0x12e00000 0x1000>;
120        interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
121        #address-cells = <1>;
122        #size-cells = <0>;
123        clock-frequency = <100000>;
124        clocks = <&clock CLK_USI4>;
125        clock-names = "hsi2c";
126
127        pmic@66 {
128            /* compatible = "samsung,s2mps11-pmic"; */
129            reg = <0x66>;
130        };
131    };
132
133  - |
134    #include <dt-bindings/clock/exynos850.h>
135    #include <dt-bindings/interrupt-controller/arm-gic.h>
136
137    hsi2c_2: i2c@138c0000 {
138        compatible = "samsung,exynosautov9-hsi2c";
139        reg = <0x138c0000 0xc0>;
140        interrupts = <GIC_SPI 195 IRQ_TYPE_LEVEL_HIGH>;
141        #address-cells = <1>;
142        #size-cells = <0>;
143        clocks = <&cmu_peri CLK_GOUT_HSI2C2_IPCLK>,
144                 <&cmu_peri CLK_GOUT_HSI2C2_PCLK>;
145        clock-names = "hsi2c", "hsi2c_pclk";
146
147        pmic@66 {
148            /* compatible = "samsung,s2mps11-pmic"; */
149            reg = <0x66>;
150        };
151    };
152