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[198.48.202.89]) by smtp.gmail.com with ESMTPSA id m68sm1733234qkc.109.2021.07.08.16.56.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 08 Jul 2021 16:56:36 -0700 (PDT) From: Liam Beguin To: liambeguin@gmail.com, lars@metafoo.de, Michael.Hennerich@analog.com, jic23@kernel.org, charles-antoine.couret@essensium.com Cc: linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org Subject: [PATCH v1 4/4] dt-bindings: iio: adc: ad7949: add adi,reference-source Date: Thu, 8 Jul 2021 19:56:18 -0400 Message-Id: <20210708235618.1541335-5-liambeguin@gmail.com> X-Mailer: git-send-email 2.30.1.489.g328c10930387 In-Reply-To: <20210708235618.1541335-1-liambeguin@gmail.com> References: <20210708235618.1541335-1-liambeguin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Liam Beguin Add bindings documentation for the adi,reference-source property. This property is required to properly configure the ADC sample request based on which reference source should be used for the calculation. Signed-off-by: Liam Beguin --- .../bindings/iio/adc/adi,ad7949.yaml | 22 +++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml index 9b56bd4d5510..3f4629281cc8 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7949.yaml @@ -35,6 +35,28 @@ properties: "#io-channel-cells": const: 1 + adi,reference-select: + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + - enum: [0, 1, 2, 3, 6, 7] + + default: 7 + description: | + Select the reference voltage source to use when converting samples. + Acceptable values are: + - 0: Internal reference and temperature sensor enabled. + Vref=2.5V, buffered output + - 1: Internal reference and temperature sensor enabled. + Vref=4.096V, buffered output + - 2: Use external reference, temperature sensor enabled. + Internal buffer disabled + - 3: Use external reference, internal buffer and temperature sensor + enabled. + - 6: Use external reference, internal buffer and temperature sensor + disabled. + - 7: Use external reference, internal buffer enabled. + Internal reference and temperature sensor disabled. + required: - compatible - reg -- 2.30.1.489.g328c10930387