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Mon, 15 Jan 2024 05:54:22 -0800 (PST) From: Dumitru Ceclan To: 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 , 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 1/2] dt-bindings: adc: ad7173: add support for additional models Date: Mon, 15 Jan 2024 15:53:04 +0200 Message-ID: <20240115135416.10595-2-mitrutzceclan@gmail.com> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20240115135416.10595-1-mitrutzceclan@gmail.com> References: <20240115135416.10595-1-mitrutzceclan@gmail.com> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add support for: AD7172-2, AD7175-8, AD7177-2 Add hardware description of the AD771X family instead of "Bindings for" AD7172-4 does not feature an internal reference, check for ext-ref Signed-off-by: Dumitru Ceclan --- .../bindings/iio/adc/adi,ad7173.yaml | 50 +++++++++++++++++-- 1 file changed, 46 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml index 7c8caef76528..6d4b26e43144 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml @@ -11,19 +11,33 @@ maintainers: - Ceclan Dumitru description: | - Bindings for the Analog Devices AD717X ADC's. Datasheets for supported chips: + Analog Devices AD717X ADC's: + The AD717x family offer a complete integrated Sigma-Delta ADC solution which + can be used in high precision, low noise single channel applications + (Life Science measurements) or higher speed multiplexed applications + (Factory Automation PLC Input modules). 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. + + 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/AD7172-4.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/AD7175-8.pdf https://www.analog.com/media/en/technical-documentation/data-sheets/AD7176-2.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/AD7177-2.pdf properties: compatible: enum: - adi,ad7172-2 + - adi,ad7172-4 - adi,ad7173-8 - adi,ad7175-2 + - adi,ad7175-8 - adi,ad7176-2 + - adi,ad7177-2 reg: maxItems: 1 @@ -89,8 +103,10 @@ patternProperties: refout-avss: REFOUT/AVSS (Internal reference) avdd : AVDD - External reference refin2 only available on ad7173-8. - If not specified, internal reference used. + External reference refin2 only available on ad7173-8 and ad7172-4. + Internal reference refout-avss not available on ad7172-4. + + If not specified, internal reference used (if available). $ref: /schemas/types.yaml#/definitions/string enum: - refin @@ -111,12 +127,15 @@ required: allOf: - $ref: /schemas/spi/spi-peripheral-props.yaml# + # Only ad7172-4 and ad7173-8 support refin2 - if: properties: compatible: not: contains: - const: adi,ad7173-8 + anyOf: + - const: adi,ad7172-4 + - const: adi,ad7173-8 then: properties: refin2-supply: false @@ -129,6 +148,29 @@ allOf: - refout-avss - avdd + # Model ad7172-4 does not support internal reference + # mandatory to have an external reference + - if: + properties: + compatible: + contains: + const: adi,ad7172-4 + then: + patternProperties: + "^channel@[0-9a-f]$": + properties: + adi,reference-select: + enum: + - refin + - refin2 + - avdd + default: false + required: + - adi,reference-select + oneOf: + - required: [refin2-supply] + - required: [refin-supply] + unevaluatedProperties: false examples: