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authorJonathan Cameron <Jonathan.Cameron@huawei.com>2020-10-31 19:12:33 +0100
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2020-12-03 20:40:18 +0100
commitdba91f82d58023d961b793fe35ff1d1305d92aab (patch)
tree88a147d18e31cbacdb6bf77c4abfc754514062de /Documentation
parentdt-bindings:iio:adc:adi,ad7292: Use new adc.yaml binding for channels. (diff)
downloadlinux-dba91f82d58023d961b793fe35ff1d1305d92aab.tar.xz
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dt-bindings:iio:iio-binding.txt Drop file as content now in dt-schema
File contained generic IIO wide bindings. Now part of the external dt-schema repository. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20201031181242.742301-2-jic23@kernel.org
Diffstat (limited to 'Documentation')
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@@ -1,102 +0,0 @@
-This binding is derived from clock bindings, and based on suggestions
-from Lars-Peter Clausen [1].
-
-Sources of IIO channels can be represented by any node in the device
-tree. Those nodes are designated as IIO providers. IIO consumer
-nodes use a phandle and IIO specifier pair to connect IIO provider
-outputs to IIO inputs. Similar to the gpio specifiers, an IIO
-specifier is an array of one or more cells identifying the IIO
-output on a device. The length of an IIO specifier is defined by the
-value of a #io-channel-cells property in the IIO provider node.
-
-[1] https://marc.info/?l=linux-iio&m=135902119507483&w=2
-
-==IIO providers==
-
-Required properties:
-#io-channel-cells: Number of cells in an IIO specifier; Typically 0 for nodes
- with a single IIO output and 1 for nodes with multiple
- IIO outputs.
-
-Optional properties:
-label: A symbolic name for the device.
-
-
-Example for a simple configuration with no trigger:
-
- adc: voltage-sensor@35 {
- compatible = "maxim,max1139";
- reg = <0x35>;
- #io-channel-cells = <1>;
- label = "voltage_feedback_group1";
- };
-
-Example for a configuration with trigger:
-
- adc@35 {
- compatible = "some-vendor,some-adc";
- reg = <0x35>;
-
- adc1: iio-device@0 {
- #io-channel-cells = <1>;
- /* other properties */
- };
- adc2: iio-device@1 {
- #io-channel-cells = <1>;
- /* other properties */
- };
- };
-
-==IIO consumers==
-
-Required properties:
-io-channels: List of phandle and IIO specifier pairs, one pair
- for each IIO input to the device. Note: if the
- IIO provider specifies '0' for #io-channel-cells,
- then only the phandle portion of the pair will appear.
-
-Optional properties:
-io-channel-names:
- List of IIO input name strings sorted in the same
- order as the io-channels property. Consumers drivers
- will use io-channel-names to match IIO input names
- with IIO specifiers.
-io-channel-ranges:
- Empty property indicating that child nodes can inherit named
- IIO channels from this node. Useful for bus nodes to provide
- and IIO channel to their children.
-
-For example:
-
- device {
- io-channels = <&adc 1>, <&ref 0>;
- io-channel-names = "vcc", "vdd";
- };
-
-This represents a device with two IIO inputs, named "vcc" and "vdd".
-The vcc channel is connected to output 1 of the &adc device, and the
-vdd channel is connected to output 0 of the &ref device.
-
-==Example==
-
- adc: max1139@35 {
- compatible = "maxim,max1139";
- reg = <0x35>;
- #io-channel-cells = <1>;
- };
-
- ...
-
- iio-hwmon {
- compatible = "iio-hwmon";
- io-channels = <&adc 0>, <&adc 1>, <&adc 2>,
- <&adc 3>, <&adc 4>, <&adc 5>,
- <&adc 6>, <&adc 7>, <&adc 8>,
- <&adc 9>;
- };
-
- some_consumer {
- compatible = "some-consumer";
- io-channels = <&adc 10>, <&adc 11>;
- io-channel-names = "adc1", "adc2";
- };