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Wed, 17 Dec 2025 07:42:41 -0500 From: Jonathan Santos To: , , CC: Jonathan Santos , , , , , , , , , , , Krzysztof Kozlowski Subject: [PATCH v5 1/5] dt-bindings: iio: adc: ad7768-1: add new supported parts Date: Wed, 17 Dec 2025 02:52:22 -0300 Message-ID: <091646c482e7f0f259e199c18a8f09a35f50f1da.1765900411.git.Jonathan.Santos@analog.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMjE3MDA5OCBTYWx0ZWRfX1fLErD7XDiWc HVAirnHFxg8dgz6jBu/29b3FurpnzCSrG07hk+Fkz7P9CdyBcx9aOFx100edWY+P+xNisB5XKG7 laFt2kdDYVQMz9NZOfiDKBgK3xZ0JZ/CQVNITkWdi4oN5eyrlFadR4so5aGXmsvPCcThhtLmmSG 3wAri+u6Thn3kVIeH/B14qkkdTL7zFqeYrbNPmFZreKvkx6f/THDoA5NLpORZsPuMVk9wL0AWIe aekJcsMPYCdFb8OpRcmj0bO92nj5hfyviYDdxZ1heakfHs3cUme14aRu8IwGbO2qFW8J1Mf3CYs nmTyCNpPhdvRI0K1kqBvupep+erdvnOC7d2rxL6I7zOhBP+L+ak+D+usnOss/4EzAqL2L7rDmrx Xyb7oC25vI1cniAwfy269cGIEFd0zQ== X-Authority-Analysis: v=2.4 cv=TZGbdBQh c=1 sm=1 tr=0 ts=6942a550 cx=c_pps a=3WNzaoukacrqR9RwcOSAdA==:117 a=3WNzaoukacrqR9RwcOSAdA==:17 a=IkcTkHD0fZMA:10 a=wP3pNCr1ah4A:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=gAnH3GRIAAAA:8 a=gEfo2CItAAAA:8 a=EUspDBNiAAAA:8 a=W-COrTu4jwGsOlXsrW0A:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=sptkURWiP4Gy88Gu7hUp:22 X-Proofpoint-GUID: arOmzTq6umB8hyCzeGhZDNDts0e_qQPT X-Proofpoint-ORIG-GUID: arOmzTq6umB8hyCzeGhZDNDts0e_qQPT X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-12-17_01,2025-12-16_05,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 impostorscore=0 spamscore=0 priorityscore=1501 bulkscore=0 lowpriorityscore=0 clxscore=1011 malwarescore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2512170098 Add compatibles for supported parts in the ad7768-1 family: ADAQ7767-1, ADAQ7768-1 and ADAQ7769-1 Add property and checks for AFF gain, supported by ADAQ7767-1 and ADAQ7769-1, and for PGA gain, supported by ADAQ7768-1 and ADAQ7769-1: adi,aaf-gain-bp pga-gpios Reviewed-by: Krzysztof Kozlowski Signed-off-by: Jonathan Santos --- v5 Changes: * None. v4 Changes: * Inspired by [1], Included pga-gpios property for parts that support PGA g= ain. Before we were using the internal gpio controller to manage the PGA pins, but still exposing the controller for external use (causing possible conf= licts). Using pga-gpios we can let the consumer define the pins to be used for PG= A, even from the internal gpio controller (but not limited by that). The pro= blem with that approach is the deadlock described in the last patch from this = set. v3 Changes: * Renamed adi,gain-milli to adi,aaf-gain-bp. Now it represents basis points (one hundredth of a percent) as suggested by Krzysztof. Description was adjusted. Note: permille (1/1000) was also suggested as unit for this property. v2 Changes: * adi,aaf-gain property renamed to adi,gain-milli. Description was=20 simplified. * default value add to adi,gain-milli. [1]: https://lore.kernel.org/linux-iio/318c31e023ebe30cc99b8743e87e869bf5e1= f12b.1760984107.git.marcelo.schmitt@analog.com/ --- .../bindings/iio/adc/adi,ad7768-1.yaml | 64 +++++++++++++++++-- 1 file changed, 60 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml b/= Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml index c06d0fc791d3..dfa2d7fa9fb3 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7768-1.yaml @@ -4,18 +4,26 @@ $id: http://devicetree.org/schemas/iio/adc/adi,ad7768-1.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# =20 -title: Analog Devices AD7768-1 ADC device driver +title: Analog Devices AD7768-1 ADC family =20 maintainers: - Michael Hennerich =20 description: | - Datasheet at: - https://www.analog.com/media/en/technical-documentation/data-sheets/ad= 7768-1.pdf + Analog Devices AD7768-1 24-Bit Single Channel Low Power sigma-delta ADC = family + + https://www.analog.com/media/en/technical-documentation/data-sheets/ad77= 68-1.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/adaq= 7767-1.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/adaq= 7768-1.pdf + https://www.analog.com/media/en/technical-documentation/data-sheets/adaq= 7769-1.pdf =20 properties: compatible: - const: adi,ad7768-1 + enum: + - adi,ad7768-1 + - adi,adaq7767-1 + - adi,adaq7768-1 + - adi,adaq7769-1 =20 reg: maxItems: 1 @@ -58,6 +66,25 @@ properties: description: ADC reference voltage supply =20 + adi,aaf-gain-bp: + description: | + Specifies the gain applied by the Analog Anti-Aliasing Filter (AAF) + to the ADC input in basis points (one hundredth of a percent). + The hardware gain is determined by which input pin(s) the signal go= es + through into the AAF. The possible connections are: + * For the ADAQ7767-1: Input connected to IN1=C2=B1, IN2=C2=B1 or IN= 3=C2=B1. + * For the ADAQ7769-1: OUT_PGA pin connected to IN1_AAF+, IN2_AAF+, + or IN3_AAF+. + enum: [1430, 3640, 10000] + default: 10000 + + pga-gpios: + description: + GAIN 0, GAIN1 and GAIN2 pins for gain selection. For devices that ha= ve + PGA configuration input pins, pga-gpios must be defined. + minItems: 3 + maxItems: 3 + adi,sync-in-gpios: maxItems: 1 description: @@ -147,6 +174,35 @@ patternProperties: allOf: - $ref: /schemas/spi/spi-peripheral-props.yaml# =20 + # AAF Gain property only applies to ADAQ7767-1 and ADAQ7769-1 devices + - if: + properties: + compatible: + contains: + enum: + - adi,adaq7767-1 + - adi,adaq7769-1 + then: + required: + - adi,aaf-gain-bp + else: + properties: + adi,aaf-gain-bp: false + + - if: + properties: + compatible: + contains: + enum: + - adi,adaq7768-1 + - adi,adaq7769-1 + then: + required: + - pga-gpios + else: + properties: + pga-gpios: false + unevaluatedProperties: false =20 examples: --=20 2.34.1