From 90c430d32c5fa08363b3db402df1b937901dd5b3 Mon Sep 17 00:00:00 2001
From: Stefan Popa <stefan.popa@analog.com>
Date: Tue, 13 Nov 2018 13:21:01 +0200
Subject: [PATCH] dt-bindings: iio: adc: Add common ADCs properties to a
separate file
There are several ADC drivers that depend on the same device tree
bindings. Rather than continue to duplicate the properties, this patch
adds a common adc binding document that can be referenced. For beginning,
only two properties are documented.
Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
.../devicetree/bindings/iio/adc/adc.txt | 23 +++++++++++++++++++
1 file changed, 23 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/adc.txt
diff --git a/Documentation/devicetree/bindings/iio/adc/adc.txt b/Documentation/devicetree/bindings/iio/adc/adc.txt
new file mode 100644
index 0000000000000..5bbaa330a2506
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adc.txt
@@ -0,0 +1,23 @@
+Common ADCs properties
+
+Optional properties for child nodes:
+- bipolar : Boolean, if set the channel is used in bipolar mode.
+- diff-channels : Differential channels muxed for this ADC. The first value
+ specifies the positive input pin, the second value the negative
+ input pin.
+
+Example:
+ adc@0 {
+ compatible = "some,adc";
+ ...
+ channel@0 {
+ bipolar;
+ diff-channels = <0 1>;
+ ...
+ };
+
+ channel@1 {
+ diff-channels = <2 3>;
+ ...
+ };
+ };
--
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