xref: /linux/Documentation/devicetree/bindings/i2c/samsung,s3c2410-i2c.yaml (revision 60a2f25de7b8b785baee2932db932ae9a5b8c86d) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/i2c/samsung,s3c2410-i2c.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Samsung S3C/S5P/Exynos SoC I2C Controller
8
9maintainers:
10  - Krzysztof Kozlowski <krzk@kernel.org>
11
12properties:
13  compatible:
14    oneOf:
15      - enum:
16          - samsung,s3c2410-i2c
17          - samsung,s3c2440-i2c
18            # For s3c2440-like I2C used inside HDMIPHY block found on several SoCs:
19          - samsung,s3c2440-hdmiphy-i2c
20            # For s3c2440-like I2C used as a host to SATA PHY controller on an
21            # internal bus:
22          - samsung,exynos5-sata-phy-i2c
23      - items:
24          - enum:
25              - samsung,exynos7885-i2c
26              - samsung,exynos850-i2c
27          - const: samsung,s3c2440-i2c
28
29  '#address-cells':
30    const: 1
31
32  clocks:
33    maxItems: 1
34
35  clock-names:
36    items:
37      - const: i2c
38
39  gpios:
40    description: |
41      The order of the GPIOs should be the following:: <SDA, SCL>.  The GPIO
42      specifier depends on the gpio controller. Required in all cases except
43      for "samsung,s3c2440-hdmiphy-i2c" whose input/output lines are
44      permanently wired to the respective client.
45      This property is deprecated. Use "pinctrl-0" and "pinctrl-names" instead.
46    deprecated: true
47
48  interrupts:
49    maxItems: 1
50
51  reg:
52    maxItems: 1
53
54  samsung,i2c-max-bus-freq:
55    $ref: /schemas/types.yaml#/definitions/uint32
56    description:
57      Desired frequency in Hz of the bus.
58    default: 100000
59
60  samsung,i2c-sda-delay:
61    $ref: /schemas/types.yaml#/definitions/uint32
62    description:
63      Delay (in ns) applied to data line (SDA) edges.
64    default: 0
65
66  samsung,i2c-slave-addr:
67    $ref: /schemas/types.yaml#/definitions/uint32
68    description:
69      Slave address in multi-master environment.
70    default: 0
71
72  samsung,sysreg-phandle:
73    $ref: /schemas/types.yaml#/definitions/phandle
74    description: Pandle to syscon used to control the system registers.
75
76  '#size-cells':
77    const: 0
78
79required:
80  - compatible
81  - reg
82
83allOf:
84  - $ref: /schemas/i2c/i2c-controller.yaml#
85  - if:
86      properties:
87        compatible:
88          contains:
89            enum:
90              - samsung,s3c2440-hdmiphy-i2c
91              - samsung,exynos5-sata-phy-i2c
92    then:
93      properties:
94        gpios: false
95
96  - if:
97      properties:
98        compatible:
99          contains:
100            enum:
101              - samsung,s3c2410-i2c
102              - samsung,s3c2440-i2c
103              - samsung,s3c2440-hdmiphy-i2c
104    then:
105      required:
106        - interrupts
107
108unevaluatedProperties: false
109
110examples:
111  - |
112    #include <dt-bindings/clock/exynos5250.h>
113    #include <dt-bindings/interrupt-controller/arm-gic.h>
114
115    i2c@12c60000 {
116        compatible = "samsung,s3c2440-i2c";
117        reg = <0x12C60000 0x100>;
118        interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>;
119        #address-cells = <1>;
120        #size-cells = <0>;
121        clocks = <&clock CLK_I2C0>;
122        clock-names = "i2c";
123        pinctrl-names = "default";
124        pinctrl-0 = <&i2c0_bus>;
125
126        samsung,sysreg-phandle = <&sysreg_system_controller>;
127        samsung,i2c-sda-delay = <100>;
128        samsung,i2c-max-bus-freq = <20000>;
129        samsung,i2c-slave-addr = <0x66>;
130
131        eeprom@50 {
132            compatible = "samsung,s524ad0xd1", "atmel,24c128";
133            reg = <0x50>;
134        };
135    };
136
137    i2c@12ce0000 {
138        compatible = "samsung,s3c2440-hdmiphy-i2c";
139        reg = <0x12CE0000 0x1000>;
140        interrupts = <GIC_SPI 64 IRQ_TYPE_LEVEL_HIGH>;
141        #address-cells = <1>;
142        #size-cells = <0>;
143        clocks = <&clock CLK_I2C_HDMI>;
144        clock-names = "i2c";
145
146        samsung,i2c-sda-delay = <100>;
147        samsung,i2c-max-bus-freq = <66000>;
148
149        phy-i2c@38 {
150            compatible = "samsung,exynos4212-hdmiphy";
151            reg = <0x38>;
152        };
153    };
154
155    i2c@121d0000 {
156        compatible = "samsung,exynos5-sata-phy-i2c";
157        reg = <0x121D0000 0x100>;
158        #address-cells = <1>;
159        #size-cells = <0>;
160        clocks = <&clock CLK_SATA_PHYI2C>;
161        clock-names = "i2c";
162
163        samsung,i2c-sda-delay = <100>;
164        samsung,i2c-max-bus-freq = <40000>;
165
166        phy-i2c@38 {
167            compatible = "samsung,exynos-sataphy-i2c";
168            reg = <0x38>;
169        };
170    };
171