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dt-bindings: iio: afe: voltage-divider: Add io-channel-cells 

Enable the voltage divider to both receive and provide measurement
services by adding #io-channel-cells.

This is especially valuable in scenarios where an ADC has an analog
frontend, like a voltage divider, and obtaining its raw value isn't
interesting. It is desired to get the real voltage before the voltage
divider.

Signed-off-by: Naresh Solanki <naresh.solanki@9elements.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240206105502.648255-1-naresh.solanki@9elements.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Naresh Solanki 2024-02-06 16:25:01 +05:30 committed by Jonathan Cameron
parent 2ec17b1950
commit f1f99fcbf9
1 changed files with 11 additions and 0 deletions
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11
Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml
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@ -39,6 +39,17 @@ properties:
description: |
Channel node of a voltage io-channel.
'#io-channel-cells':
description:
In addition to consuming the measurement services of a voltage
output channel, the voltage divider can act as a provider of
measurement services to other devices. This is particularly
useful in scenarios wherein an ADC has an analog frontend,
such as a voltage divider, and then consuming its raw value
isn't interesting. In this case, the voltage before the divider
is desired.
const: 1
output-ohms:
description:
Resistance Rout over which the output voltage is measured. See full-ohms.