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dt-bindings: iio: imx8qxp-adc: add missing vref-supply

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Although this property is used right now for IIO_CHAN_INFO_SCALE,
this ADC has two internal reference voltages, which the driver currently
doesn't make use of.

Fixes: db73419d8c ("dt-bindings: iio: adc: Add binding documentation for NXP IMX8QXP ADC")
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Reviewed-by: Haibo Chen <haibo.chen@nxp.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230424092312.61746-1-alexander.stein@ew.tq-group.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexander Stein 2023-04-24 11:23:12 +02:00 committed by Jonathan Cameron
parent 3e27ef0ced
commit 72c1d11074
1 changed files with 7 additions and 0 deletions
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7
Documentation/devicetree/bindings/iio/adc/nxp,imx8qxp-adc.yaml
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@ -39,6 +39,12 @@ properties:
power-domains:
maxItems: 1
vref-supply:
description: |
External ADC reference voltage supply on VREFH pad. If VERID[MVI] is
set, there are additional, internal reference voltages selectable.
VREFH1 is always from VREFH pad.
"#io-channel-cells":
const: 1
@ -72,6 +78,7 @@ examples:
assigned-clocks = <&clk IMX_SC_R_ADC_0>;
assigned-clock-rates = <24000000>;
power-domains = <&pd IMX_SC_R_ADC_0>;
vref-supply = <&reg_1v8>;
#io-channel-cells = <1>;
};
};