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dt-bindings: iio: afe: current-sense-shunt: add io-channel-cells

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The current-sense-shunt is an IIO provider thus can be referenced by IIO
consumers (via "io-channels" property in consumer device node).
Such provider is required to describe number of cells used in phandle
lookup with "io-channel-cells" property.  This also fixes dtbs_check
warnings like:

  arch/arm/boot/dts/s5pv210-fascinate4g.dt.yaml: current-sense-shunt:
    '#io-channel-cells' does not match any of the regexes: 'pinctrl-[0-9]+'

Fixes: ce66e52b6c ("dt-bindings:iio:afe:current-sense-shunt: txt to yaml conversion.")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Krzysztof Kozlowski
2021-05-06 11:06:37 -04:00
committed by Jonathan Cameron
parent f42590c4cb
commit 347978983b
1 changed files with 4 additions and 0 deletions
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4
Documentation/devicetree/bindings/iio/afe/current-sense-shunt.yaml
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@@ -24,6 +24,9 @@ properties:
description: |
Channel node of a voltage io-channel.
"#io-channel-cells":
const: 0
shunt-resistor-micro-ohms:
description: The shunt resistance.
@@ -57,6 +60,7 @@ examples:
sysi {
compatible = "current-sense-shunt";
io-channels = <&tiadc 0>;
#io-channel-cells = <0>;
/* Divide the voltage by 3300000/1000000 (or 3.3) for the current. */
shunt-resistor-micro-ohms = <3300000>;