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Message-ID: <20240206105502.648255-1-naresh.solanki@9elements.com>
Date: Tue, 6 Feb 2024 16:25:01 +0530
From: Naresh Solanki <naresh.solanki@...ements.com>
To: Peter Rosin <peda@...ntia.se>,
Jonathan Cameron <jic23@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>
Cc: mazziesaccount@...il.com,
Naresh Solanki <naresh.solanki@...ements.com>,
linux-iio@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v4] 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@...ements.com>
---
.../devicetree/bindings/iio/afe/voltage-divider.yaml | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml b/Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml
index dddf97b50549..fd3c511e1beb 100644
--- a/Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml
+++ b/Documentation/devicetree/bindings/iio/afe/voltage-divider.yaml
@@ -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. It is desired to get the real voltage
+ before the voltage divider.
+ const: 1
+
output-ohms:
description:
Resistance Rout over which the output voltage is measured. See full-ohms.
base-commit: 99bd3cb0d12e85d5114425353552121ec8f93adc
--
2.42.0
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