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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
# Copyright (c) 2020 MediaTek Inc.
%YAML 1.2
---
$id: http://devicetree.org/schemas/media/i2c/dongwoon,dw9768.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Dongwoon Anatech DW9768 Voice Coil Motor (VCM) Lens Device Tree Bindings
maintainers:
- Dongchun Zhu <dongchun.zhu@mediatek.com>
description: |-
The Dongwoon DW9768 is a single 10-bit digital-to-analog (DAC) converter
with 100 mA output current sink capability. VCM current is controlled with
a linear mode driver. The DAC is controlled via a 2-wire (I2C-compatible)
serial interface that operates at clock rates up to 1MHz. This chip
integrates Advanced Actuator Control (AAC) technology and is intended for
driving voice coil lenses in camera modules.
properties:
compatible:
enum:
- dongwoon,dw9768 # for DW9768 VCM
- giantec,gt9769 # for GT9769 VCM
reg:
maxItems: 1
vin-supply:
description:
Definition of the regulator used as Digital I/O voltage supply.
vdd-supply:
description:
Definition of the regulator used as Digital core voltage supply.
dongwoon,aac-mode:
description:
Indication of AAC mode select.
$ref: "/schemas/types.yaml#/definitions/uint32"
enum:
- 1 # AAC2 mode(operation time# 0.48 x Tvib)
- 2 # AAC3 mode(operation time# 0.70 x Tvib)
- 3 # AAC4 mode(operation time# 0.75 x Tvib)
- 5 # AAC8 mode(operation time# 1.13 x Tvib)
default: 2
dongwoon,aac-timing:
description:
Number of AAC Timing count that controlled by one 6-bit period of
vibration register AACT[5:0], the unit of which is 100 us.
$ref: "/schemas/types.yaml#/definitions/uint32"
default: 0x20
minimum: 0x00
maximum: 0x3f
dongwoon,clock-presc:
description:
Indication of VCM internal clock dividing rate select, as one multiple
factor to calculate VCM ring periodic time Tvib.
$ref: "/schemas/types.yaml#/definitions/uint32"
enum:
- 0 # Dividing Rate - 2
- 1 # Dividing Rate - 1
- 2 # Dividing Rate - 1/2
- 3 # Dividing Rate - 1/4
- 4 # Dividing Rate - 8
- 5 # Dividing Rate - 4
default: 1
required:
- compatible
- reg
- vin-supply
- vdd-supply
additionalProperties: false
examples:
- |
i2c {
#address-cells = <1>;
#size-cells = <0>;
dw9768: camera-lens@c {
compatible = "dongwoon,dw9768";
reg = <0x0c>;
vin-supply = <&mt6358_vcamio_reg>;
vdd-supply = <&mt6358_vcama2_reg>;
dongwoon,aac-timing = <0x39>;
};
};
...
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