Some devices may require a current adc, but only have a voltage ADC onboard. In order to read the current, they have a resistor connected to the ADC. Add bindings for this possibility. Signed-off-by: Jonathan Bakker <xc-racer2@xxxxxxx> --- .../iio/adc/linux,current-from-voltage.yaml | 47 +++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/linux,current-from-voltage.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/linux,current-from-voltage.yaml b/Documentation/devicetree/bindings/iio/adc/linux,current-from-voltage.yaml new file mode 100644 index 000000000000..385d317607c3 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/linux,current-from-voltage.yaml @@ -0,0 +1,47 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/linux,current-from-voltage.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Current ADC from voltage ADC and resistor + +maintainers: + - Jonathan Bakker <xc-racer2@xxxxxxx> + +properties: + compatible: + const: linux,current-from-voltage + + io-channel-names: + const: adc + + io-channels: + maxItems: 1 + description: Voltage ADC channel + + linux,resistor-ohms: + description: Strength of resistor connected to voltage ADC + + "#io-channel-cells": + const: 0 + +required: + - compatible + - io-channel-names + - io-channels + - linux,resistor-ohms + - "#io-channel-cells" + +examples: + - | + current-from-voltage { + compatible = "linux,current-from-voltage"; + io-channel-names = "adc"; + io-channels = <&adc 9>; + linux,resistor-ohms = <47>; + #io-channel-cells = <0>; + io-channel-ranges; + }; + +... -- 2.20.1
