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Message-ID: <20250824040943.9385-1-Jonathan.Santos@analog.com>
Date: Sun, 24 Aug 2025 01:09:43 -0300
From: Jonathan Santos <Jonathan.Santos@...log.com>
To: <linux-kernel@...r.kernel.org>, <linux-iio@...r.kernel.org>,
<devicetree@...r.kernel.org>
CC: Jonathan Santos <Jonathan.Santos@...log.com>,
<Michael.Hennerich@...log.com>, <lars@...afoo.de>, <jic23@...nel.org>,
<dlechner@...libre.com>, <nuno.sa@...log.com>, <andy@...nel.org>,
<robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
<marcelo.schmitt1@...il.com>
Subject: [PATCH v2 1/4] dt-bindings: iio: adc: ad7768-1: add new supported parts
Add compatibles for supported parts in the ad7768-1 family:
ADAQ7767-1, ADAQ7768-1 and ADAQ7769-1
Add property and checks for AAF gain, supported by ADAQ7767-1
and ADAQ7769-1 parts:
adi,gain-milli
Signed-off-by: Jonathan Santos <Jonathan.Santos@...log.com>
---
v2 Changes:
* adi,aaf-gain property renamed to adi,gain-milli. Description was
simplified.
* default value add to adi,gain-milli.
---
.../bindings/iio/adc/adi,ad7768-1.yaml | 43 +++++++++++++++++--
1 file changed, 39 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..0c39491f6179 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#
-title: Analog Devices AD7768-1 ADC device driver
+title: Analog Devices AD7768-1 ADC family
maintainers:
- Michael Hennerich <michael.hennerich@...log.com>
description: |
- Datasheet at:
- https://www.analog.com/media/en/technical-documentation/data-sheets/ad7768-1.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/ad7768-1.pdf
+ https://www.analog.com/media/en/technical-documentation/data-sheets/adaq7767-1.pdf
+ https://www.analog.com/media/en/technical-documentation/data-sheets/adaq7768-1.pdf
+ https://www.analog.com/media/en/technical-documentation/data-sheets/adaq7769-1.pdf
properties:
compatible:
- const: adi,ad7768-1
+ enum:
+ - adi,ad7768-1
+ - adi,adaq7767-1
+ - adi,adaq7768-1
+ - adi,adaq7769-1
reg:
maxItems: 1
@@ -58,6 +66,18 @@ properties:
description:
ADC reference voltage supply
+ adi,gain-milli:
+ description: |
+ Specifies the gain applied by the Analog Anti-Aliasing Filter (AAF) to the
+ ADC input (in milli units). The hardware gain is determined by which input
+ pin(s) the signal goes through into the AAF. The possible connections are
+ * For the ADAQ7767-1: Input connected to IN1±, IN2± or IN3±.
+ * For the ADAQ7769-1: OUT_PGA pin connected to IN1_AAF+, IN2_AAF+,
+ or IN3_AAF+.
+ $ref: /schemas/types.yaml#/definitions/uint16
+ enum: [143, 364, 1000]
+ default: 1000
+
adi,sync-in-gpios:
maxItems: 1
description:
@@ -147,6 +167,21 @@ patternProperties:
allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
+ # 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,gain-milli
+ else:
+ properties:
+ adi,gain-milli: false
+
unevaluatedProperties: false
examples:
--
2.34.1
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