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Date: Thu, 16 Nov 2023 15:54:13 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: mitrutzceclan <mitrutzceclan@...il.com>
Cc: linus.walleij@...aro.org, brgl@...ev.pl, andy@...nel.org,
linux-gpio@...r.kernel.org, Lars-Peter Clausen <lars@...afoo.de>,
Jonathan Cameron <jic23@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
Michael Walle <michael@...le.cc>,
Andy Shevchenko <andy.shevchenko@...il.com>,
Arnd Bergmann <arnd@...db.de>,
ChiaEn Wu <chiaen_wu@...htek.com>,
Niklas Schnelle <schnelle@...ux.ibm.com>,
Leonard Göhrs <l.goehrs@...gutronix.de>,
Mike Looijmans <mike.looijmans@...ic.nl>,
Haibo Chen <haibo.chen@....com>,
Hugo Villeneuve <hvilleneuve@...onoff.com>,
Ceclan Dumitru <dumitru.ceclan@...log.com>,
linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
Conor Dooley <conor.dooley@...rochip.com>
Subject: Re: [PATCH v4 1/2] dt-bindings: adc: add AD7173
On 16/11/2023 14:46, mitrutzceclan wrote:
> From: Dumitru Ceclan <mitrutzceclan@...il.com>
>
> The AD7173 family offer a complete integrated Sigma-Delta ADC solution
> which can be used in high precision, low noise single channel applications
> or higher speed multiplexed applications. The Sigma-Delta ADC is intended
> primarily for measurement of signals close to DC but also delivers
> outstanding performance with input bandwidths out to ~10kHz.
>
> Reviewed-by: Conor Dooley <conor.dooley@...rochip.com> # except reference_select
Please drop the tag. You clearly did not test it, so it must be
re-reviewed. Do not send code which was not tested.
> Signed-off-by: Dumitru Ceclan <mitrutzceclan@...il.com>
> ---
> V3 -> V4
> - include supply attributes
> - add channel attribute for selecting conversion reference
>
> .../bindings/iio/adc/adi,ad7173.yaml | 166 ++++++++++++++++++
> 1 file changed, 166 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml
> new file mode 100644
> index 000000000000..92aa352b6653
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml
> @@ -0,0 +1,166 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2023 Analog Devices Inc.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/adi,ad7173.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices AD7173 ADC device driver
Drop: device driver
Bindings are for hardware.
> +
> +maintainers:
> + - Ceclan Dumitru <dumitru.ceclan@...log.com>
> +
> +description: |
> + Bindings for the Analog Devices AD717X ADC's. Datasheets for supported chips:
> + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7172-2.pdf
> + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7173-8.pdf
> + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7175-2.pdf
> + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7176-2.pdf
> +
> +properties:
> + compatible:
> + enum:
> + - adi,ad7172-2
> + - adi,ad7173-8
> + - adi,ad7175-2
> + - adi,ad7176-2
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> + spi-max-frequency:
> + maximum: 20000000
> +
> + refin-supply:
> + description: external reference supply, can be used as reference for conversion.
> +
> + refin2-supply:
> + description: external reference supply, can be used as reference for conversion.
> +
> + avdd-supply:
> + description: avdd supply, can be used as reference for conversion.
> +
> + dependencies:
Nope, needs testing... See also example-schema.
> + refin2-supply:
> + properties:
> + compatible:
> + adi,ad7173-8
> +
> + required:
Please open example schema and put it in similar place.
> + - compatible
> + - reg
> + - interrupts
> +
> +patternProperties:
> + "^channel@[0-9a-f]$":
> + type: object
> + $ref: adc.yaml
> + unevaluatedProperties: false
> +
> + properties:
> + reg:
> + minimum: 0
> + maximum: 15
> +
> + diff-channels:
> + items:
> + minimum: 0
> + maximum: 31
> +
> + adi,reference-select:
> + description: |
> + Select the reference source to use when converting on
> + the specific channel. Valid values are:
> + 0: REFIN(+)/REFIN(−).
> + 1: REFIN2(+)/REFIN2(−)
> + 2: REFOUT/AVSS (Internal reference)
> + 3: AVDD
> +
> + External reference 2 only available on ad7173-8.
> + If not specified, internal reference used.
> + $ref: /schemas/types.yaml#/definitions/uint32
> + enum: [0, 1, 2, 3]
> + default: 2
> +
> + bipolar:
> + type: boolean
> +
> + required:
> + - reg
> + - diff-channels
> +
> +allOf:
> + - $ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> + - if:
> + properties:
> + compatible:
> + contains:
> + const: adi,ad7173-8
> + then:
??? Maybe you want to use "not"?
> + else:
> + patternProperties:
> + "^channel@[0-9a-f]$":
> + properties:
> + enum: [0, 2, 3]
> +
> +unevaluatedProperties: false
> +
Best regards,
Krzysztof
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