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Thu, 23 Nov 2023 06:03:38 -0800 (PST) From: mitrutzceclan X-Google-Original-From: mitrutzceclan Cc: linus.walleij@linaro.org, brgl@bgdev.pl, andy@kernel.org, linux-gpio@vger.kernel.org, Lars-Peter Clausen , Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Michael Walle , Andy Shevchenko , Arnd Bergmann , ChiaEn Wu , Niklas Schnelle , =?utf-8?q?Leonard_G=C3=B6hrs?= , Mike Looijmans , Haibo Chen , Hugo Villeneuve , Ceclan Dumitru , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Dumitru Ceclan Subject: [PATCH v5 1/2] dt-bindings: adc: add AD7173 Date: Thu, 23 Nov 2023 16:02:55 +0200 Message-ID: <20231123140320.30409-1-user@HYB-hhAwRlzzMZb> X-Mailer: git-send-email 2.42.0 MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_BLOCKED,SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE, URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (snail.vger.email [0.0.0.0]); Thu, 23 Nov 2023 06:03:46 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1783363853688131891 X-GMAIL-MSGID: 1783363853688131891 From: Dumitru Ceclan 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. Signed-off-by: Dumitru Ceclan --- V4 -> V5 - Use string enum instead of integers for "adi,reference-select" - Fix conditional checking in regards to compatible .../bindings/iio/adc/adi,ad7173.yaml | 169 ++++++++++++++++++ 1 file changed, 169 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..32a59a2f2e91 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml @@ -0,0 +1,169 @@ +# 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 + +maintainers: + - Ceclan Dumitru + +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. + + required: + - 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: + refin : REFIN(+)/REFIN(−). + refin2 : REFIN2(+)/REFIN2(−) + refout-avss: REFOUT/AVSS (Internal reference) + avdd : AVDD + + External reference refin2 only available on ad7173-8. + If not specified, internal reference used. + enum: + - refin + - refin2 + - refout-avss + - avdd + default: refout-avss + + bipolar: + type: boolean + + required: + - reg + - diff-channels + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + + - if: + properties: + compatible: + not: + contains: + const: adi,ad7173-8 + then: + properties: + refin2-supply: false + patternProperties: + "^channel@[0-9a-f]$": + properties: + adi,reference-select: + enum: + - refin + - refout-avss + - avdd + +unevaluatedProperties: false + +examples: + - | + #include + #include + + spi { + #address-cells = <1>; + #size-cells = <0>; + + adc@0 { + compatible = "adi,ad7173-8"; + reg = <0>; + + #address-cells = <1>; + #size-cells = <0>; + + interrupts = <25 IRQ_TYPE_EDGE_FALLING>; + interrupt-parent = <&gpio>; + spi-max-frequency = <5000000>; + + channel@0 { + reg = <0>; + bipolar; + diff-channels = <0 1>; + }; + + channel@1 { + reg = <1>; + diff-channels = <2 3>; + }; + + channel@2 { + reg = <2>; + bipolar; + diff-channels = <4 5>; + }; + + channel@3 { + reg = <3>; + bipolar; + diff-channels = <6 7>; + }; + + channel@4 { + reg = <4>; + diff-channels = <8 9>; + }; + }; + };