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dt-bindings: iio: potentiometer: Add Microchip MCP41xxx/42xxx

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This patch adds device tree documentation for the Microchip
MCP41xxx/42xxx family of digital potentiometers.

Signed-off-by: Chris Coffey <cmc@babblebit.net>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Chris Coffey 2018-11-20 14:17:12 +00:00 committed by Jonathan Cameron
parent c3d8360deb
commit f71b3c9912
1 changed files with 28 additions and 0 deletions
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Documentation/devicetree/bindings/iio/potentiometer/mcp41010.txt Normal file
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* Microchip MCP41010/41050/41100/42010/42050/42100 Digital Potentiometer
Datasheet publicly available at:
http://ww1.microchip.com/downloads/en/devicedoc/11195c.pdf
The node for this driver must be a child node of a SPI controller, hence
all mandatory properties described in
Documentation/devicetree/bindings/spi/spi-bus.txt
must be specified.
Required properties:
- compatible: Must be one of the following, depending on the
model:
"microchip,mcp41010"
"microchip,mcp41050"
"microchip,mcp41100"
"microchip,mcp42010"
"microchip,mcp42050"
"microchip,mcp42100"
Example:
potentiometer@0 {
compatible = "microchip,mcp41010";
reg = <0>;
spi-max-frequency = <500000>;
};