On Tue, Apr 20, 2021 at 4:37 PM Rob Herring <robh@xxxxxxxxxx> wrote:
On Sun, Apr 18, 2021 at 07:49:51PM -0300, Lucas Stankus wrote:Thanks for the feedback!
Add device tree binding documentation for AD7746 cdc in YAML format.Seems okay to me.
Signed-off-by: Lucas Stankus <lucas.p.stankus@xxxxxxxxx>
A minor note about the adi,excitation-vdd-permille property. Jonathan
suggested the name to be adi,excitation-vdd-milicent, but I was unsure of
the milicent naming. With a quick search I found out that the common way to
call a thousandth is 'per mille', but I didn't find any use of it in the
kernel documentation. Any thoughts about it?
 https://en.wikipedia.org/wiki/Per_mille'invert' assumes I know what the non-inverted signal is. Sometimes that
.../bindings/iio/cdc/adi,ad7746.yaml | 73 +++++++++++++++++++
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create mode 100644 Documentation/devicetree/bindings/iio/cdc/adi,ad7746.yaml
diff --git a/Documentation/devicetree/bindings/iio/cdc/adi,ad7746.yaml b/Documentation/devicetree/bindings/iio/cdc/adi,ad7746.yaml
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+title: AD7746 24-Bit Capacitance-to-Digital Converter with Temperature Sensor
+ - Michael Hennerich <michael.hennerich@xxxxxxxxxx>
+ AD7746 24-Bit Capacitance-to-Digital Converter with Temperature Sensor
+ Specifications about the part can be found at:
+ - adi,ad7745
+ - adi,ad7746
+ - adi,ad7747
+ maxItems: 1
+ description: |
+ Set VDD per mille to be used as the excitation voltage.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [125, 250, 375, 500]
+ description: Enables the EXCA pin as the excitation output.
+ type: boolean
+ description: Inverts the excitation output in the EXCA pin.
+ type: boolean
makes sense, but if you can define in terms of the inverse that would be
better. For example, for a normally active low signal, name the property
From reading the data sheet I couldn't quite grasp what would be an inverted
excitation output, but I don't have a lot of experience with CDCs. Maybe someone
with more experience could help out with a better suggestion.