1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2 # Copyright (c) 2020 MediaTek Inc.
3 %YAML 1.2
4 ---
5 $id: http://devicetree.org/schemas/media/i2c/dongwoon,dw9768.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
7
8 title: Dongwoon Anatech DW9768 Voice Coil Motor (VCM) Lens
9
10 maintainers:
11 - Dongchun Zhu <dongchun.zhu@mediatek.com>
12
13 description: |-
14 The Dongwoon DW9768 is a single 10-bit digital-to-analog (DAC) converter
15 with 100 mA output current sink capability. VCM current is controlled with
16 a linear mode driver. The DAC is controlled via a 2-wire (I2C-compatible)
17 serial interface that operates at clock rates up to 1MHz. This chip
18 integrates Advanced Actuator Control (AAC) technology and is intended for
19 driving voice coil lenses in camera modules.
20
21 properties:
22 compatible:
23 enum:
24 - dongwoon,dw9768 # for DW9768 VCM
25 - giantec,gt9769 # for GT9769 VCM
26
27 reg:
28 maxItems: 1
29
30 vin-supply:
31 description:
32 Definition of the regulator used as Digital I/O voltage supply.
33
34 vdd-supply:
35 description:
36 Definition of the regulator used as Digital core voltage supply.
37
38 dongwoon,aac-mode:
39 description:
40 Indication of AAC mode select.
41 $ref: /schemas/types.yaml#/definitions/uint32
42 enum:
43 - 1 # AAC2 mode(operation time# 0.48 x Tvib)
44 - 2 # AAC3 mode(operation time# 0.70 x Tvib)
45 - 3 # AAC4 mode(operation time# 0.75 x Tvib)
46 - 5 # AAC8 mode(operation time# 1.13 x Tvib)
47 default: 2
48
49 dongwoon,aac-timing:
50 description:
51 Number of AAC Timing count that controlled by one 6-bit period of
52 vibration register AACT[5:0], the unit of which is 100 us.
53 $ref: /schemas/types.yaml#/definitions/uint32
54 default: 0x20
55 minimum: 0x00
56 maximum: 0x3f
57
58 dongwoon,clock-presc:
59 description:
60 Indication of VCM internal clock dividing rate select, as one multiple
61 factor to calculate VCM ring periodic time Tvib.
62 $ref: /schemas/types.yaml#/definitions/uint32
63 enum:
64 - 0 # Dividing Rate - 2
65 - 1 # Dividing Rate - 1
66 - 2 # Dividing Rate - 1/2
67 - 3 # Dividing Rate - 1/4
68 - 4 # Dividing Rate - 8
69 - 5 # Dividing Rate - 4
70 default: 1
71
72 required:
73 - compatible
74 - reg
75 - vin-supply
76 - vdd-supply
77
78 additionalProperties: false
79
80 examples:
81 - |
82
83 i2c {
84 #address-cells = <1>;
85 #size-cells = <0>;
86
87 dw9768: camera-lens@c {
88 compatible = "dongwoon,dw9768";
89 reg = <0x0c>;
90
91 vin-supply = <&mt6358_vcamio_reg>;
92 vdd-supply = <&mt6358_vcama2_reg>;
93 dongwoon,aac-timing = <0x39>;
94 };
95 };
96
97 ...
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