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Date: Tue, 14 May 2024 10:22:46 +0300
From: Dumitru Ceclan via B4 Relay <devnull+dumitru.ceclan.analog.com@...nel.org>
To: Ceclan Dumitru <dumitru.ceclan@...log.com>
Cc: Lars-Peter Clausen <lars@...afoo.de>,
Michael Hennerich <Michael.Hennerich@...log.com>,
Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>, David Lechner <dlechner@...libre.com>,
linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, Dumitru Ceclan <mitrutzceclan@...il.com>
Subject: [PATCH v2 1/9] dt-bindings: adc: ad7173: add support for ad411x
From: Dumitru Ceclan <dumitru.ceclan@...log.com>
Add support for: AD4111, AD4112, AD4114, AD4115, AD4116.
AD411x family ADCs support a VCOM pin, dedicated for single-ended usage.
AD4111/AD4112 support current channels, usage is implemented by
specifying channel reg values bigger than 15.
Signed-off-by: Dumitru Ceclan <dumitru.ceclan@...log.com>
---
.../devicetree/bindings/iio/adc/adi,ad7173.yaml | 118 ++++++++++++++++++++-
1 file changed, 117 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml
index ea6cfcd0aff4..6cc3514f5ed8 100644
--- a/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7173.yaml
@@ -19,7 +19,18 @@ description: |
primarily for measurement of signals close to DC but also delivers
outstanding performance with input bandwidths out to ~10kHz.
+ Analog Devices AD411x ADC's:
+ The AD411X family encompasses a series of low power, low noise, 24-bit,
+ sigma-delta analog-to-digital converters that offer a versatile range of
+ specifications. They integrate an analog front end suitable for processing
+ fully differential/single-ended and bipolar voltage inputs.
+
Datasheets for supported chips:
+ https://www.analog.com/media/en/technical-documentation/data-sheets/AD4111.pdf
+ https://www.analog.com/media/en/technical-documentation/data-sheets/AD4112.pdf
+ https://www.analog.com/media/en/technical-documentation/data-sheets/AD4114.pdf
+ https://www.analog.com/media/en/technical-documentation/data-sheets/AD4115.pdf
+ https://www.analog.com/media/en/technical-documentation/data-sheets/AD4116.pdf
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
@@ -31,6 +42,11 @@ description: |
properties:
compatible:
enum:
+ - adi,ad4111
+ - adi,ad4112
+ - adi,ad4114
+ - adi,ad4115
+ - adi,ad4116
- adi,ad7172-2
- adi,ad7172-4
- adi,ad7173-8
@@ -129,6 +145,31 @@ patternProperties:
maximum: 15
diff-channels:
+ description: |
+ For using current channels specify select the current inputs
+ and enable the adi,current-channel property.
+
+ Family AD411x supports a dedicated VCOM voltage input.
+ To select it set the second channel to 16.
+ (VIN2, VCOM) -> diff-channels = <2 16>
+
+ There are special values that can be selected besides the voltage
+ analog inputs:
+ 21: REF+
+ 22: REF−
+ Supported only by AD7172-2, AD7172-4, AD7175-2, AD7175-8, AD7177-2:
+ 19: ((AVDD1 − AVSS)/5)+
+ 20: ((AVDD1 − AVSS)/5)−
+ Supported only by AD4111, AD4112:
+ 12: IIN3+
+ 11: IIN3−
+ 13: IIN2+
+ 10: IIN2−
+ 14: IIN1+
+ 9: IIN1−
+ 15: IIN0+
+ 8: IIN0−
+
items:
minimum: 0
maximum: 31
@@ -154,6 +195,23 @@ patternProperties:
- avdd
default: refout-avss
+ adi,current-channel:
+ description: |
+ Signal that the selected inputs are current channels.
+ Only available on AD4111 and AD4112.
+ type: boolean
+
+ adi,channel-type:
+ description:
+ Used to differentiate between different channel types as the device
+ register configurations are the same for all usage types.
+ $ref: /schemas/types.yaml#/definitions/string
+ enum:
+ - single-ended
+ - pseudo-differential
+ - differential
+ default: differential
+
required:
- reg
- diff-channels
@@ -166,7 +224,6 @@ allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
# Only ad7172-4, ad7173-8 and ad7175-8 support vref2
- # Other models have [0-3] channel registers
- if:
properties:
compatible:
@@ -187,6 +244,37 @@ allOf:
- vref
- refout-avss
- avdd
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - adi,ad4114
+ - adi,ad4115
+ - adi,ad4116
+ - adi,ad7173-8
+ - adi,ad7175-8
+ then:
+ patternProperties:
+ "^channel@[0-9a-f]$":
+ properties:
+ reg:
+ maximum: 15
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - adi,ad7172-2
+ - adi,ad7175-2
+ - adi,ad7176-2
+ - adi,ad7177-2
+ then:
+ patternProperties:
+ "^channel@[0-9a-f]$":
+ properties:
reg:
maximum: 3
@@ -210,6 +298,34 @@ allOf:
required:
- adi,reference-select
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - adi,ad4111
+ - adi,ad4112
+ - adi,ad4114
+ - adi,ad4115
+ - adi,ad4116
+ then:
+ properties:
+ avdd2-supply: false
+
+ - if:
+ properties:
+ compatible:
+ not:
+ contains:
+ enum:
+ - adi,ad4111
+ - adi,ad4112
+ then:
+ patternProperties:
+ "^channel@[0-9a-f]$":
+ properties:
+ adi,current-channel: false
+
- if:
anyOf:
- required: [clock-names]
--
2.43.0
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