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dt-bindings: iio: adc: Add buffered input property

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This patch adds the buffered mode device tree property for positive and
negative inputs. Each option can be enabled independently.

In buffered mode, the input channel feeds into a high impedance input stage
of the buffer amplifier. Therefore, the input can tolerate significant
source impedances and is tailored for direct connection to external
resistive type sensors such as strain gages or RTDs.

Signed-off-by: Mircea Caprioru <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>
This commit is contained in:
Mircea Caprioru 2019-06-25 11:11:28 +03:00 • committed by Jonathan Cameron
commit c444e956a2
1 changed files with 11 additions and 0 deletions
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11
Documentation/devicetree/bindings/iio/adc/adi,ad7124.yaml
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@ -100,6 +100,14 @@ patternProperties:
description: see Documentation/devicetree/bindings/iio/adc/adc.txt
type: boolean
adi,buffered-positive:
description: Enable buffered mode for positive input.
type: boolean
adi,buffered-negative:
description: Enable buffered mode for negative input.
type: boolean
required:
- reg
- diff-channels
@ -123,6 +131,7 @@ examples:
reg = <0>;
diff-channels = <0 1>;
adi,reference-select = <0>;
adi,buffered-positive;
};
channel@1 {
@ -130,6 +139,8 @@ examples:
bipolar;
diff-channels = <2 3>;
adi,reference-select = <0>;
adi,buffered-positive;
adi,buffered-negative;
};
channel@2 {