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