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The BU27034NUC was cancelled before it entered mass production. It was replaced by a new variant BU27034ANUC (note, added 'A'). The new variant gained a few significant changes, like removal of the 3.rd data channel and dropping some of the gain settings. This means that, from software point of view these ICs are incompatible. Lux calculation based on the data from the sensors needs to be done differently, and on the BU27034ANUC the channel 3 data is missing. Also, the gain setting differencies matter. Unfortunately, the identification register was not changed so there is no safe way for the software to distinguish the variants. According to the ROHM HQ engineers, the old BU27034NUC should not be encountered in the wild. Hence it makes sense to remove the support for the old BU27034NUC and add support for the new BU27034ANUC. Change the compatible in order to not load the incompatible old driver for new sensor (or, if someone had the old sensor, the new driver for it). Drop the compatible for old sensor which should not be in the wild and add a new compatible for the new model with accurate model suffix 'anuc'. Rename the file to match the new compatible. Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com> Acked-by: Conor Dooley <conor.dooley@microchip.com> Link: https://patch.msgid.link/c39f9c67b3c07a27d7a13109c7b69cff9cfd2b9b.1720176341.git.mazziesaccount@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
46 lines
916 B
YAML
46 lines
916 B
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/iio/light/rohm,bu27034anuc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: ROHM BU27034ANUC ambient light sensor
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maintainers:
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- Matti Vaittinen <mazziesaccount@gmail.com>
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description: |
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ROHM BU27034ANUC is an ambient light sensor with 2 channels and 2 photo diodes
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capable of detecting a very wide range of illuminance. Typical application
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is adjusting LCD and backlight power of TVs and mobile phones.
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properties:
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compatible:
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const: rohm,bu27034anuc
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reg:
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maxItems: 1
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vdd-supply: true
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required:
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- compatible
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- reg
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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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light-sensor@38 {
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compatible = "rohm,bu27034anuc";
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reg = <0x38>;
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vdd-supply = <&vdd>;
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};
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};
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...
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