Commit 29a702dc authored by Jonathan Cameron's avatar Jonathan Cameron

dt-bindings:iio:temperature:maxim_thermocouple.txt to maxim,max31855k.yaml

Given we already have another maxim thermocouple driver that isn't
covered by this binding it seems a better idea to chose to name it
after a specific part.

I added an additional example for the maxim,max6755 to illustrate
the need for spi-cpha for that part.
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Acked-by: default avatarMatt Ranostay <matt.ranostay@konsulko.com>
Link: https://lore.kernel.org/r/20201031134110.724233-29-jic23@kernel.org
parent 17d1ffdf
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/iio/temperature/maxim,max31855k.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Maxim MAX31855 and similar thermocouples
maintainers:
- Matt Ranostay <matt.ranostay@konsulko.com>
description: |
https://datasheets.maximintegrated.com/en/ds/MAX6675.pdf
https://datasheets.maximintegrated.com/en/ds/MAX31855.pdf
properties:
compatible:
description:
The generic maxim,max31855 compatible is deprecated in favour of
the thermocouple type specific variants.
enum:
- maxim,max6675
- maxim,max31855
- maxim,max31855k
- maxim,max31855j
- maxim,max31855n
- maxim,max31855s
- maxim,max31855t
- maxim,max31855e
- maxim,max31855r
reg:
maxItems: 1
spi-max-frequency: true
spi-cpha: true
required:
- compatible
- reg
allOf:
- if:
properties:
compatible:
contains:
enum:
- maxim,max6675
then:
required:
- spi-cpha
else:
properties:
spi-cpha: false
additionalProperties: false
examples:
- |
spi {
#address-cells = <1>;
#size-cells = <0>;
temp-sensor@0 {
compatible = "maxim,max31855k";
reg = <0>;
spi-max-frequency = <4300000>;
};
temp-sensor@1 {
compatible = "maxim,max6675";
reg = <1>;
spi-max-frequency = <4300000>;
spi-cpha;
};
};
...
Maxim thermocouple support
* https://datasheets.maximintegrated.com/en/ds/MAX6675.pdf
* https://datasheets.maximintegrated.com/en/ds/MAX31855.pdf
Required properties:
- compatible: must be "maxim,max6675" or one of the following:
"maxim,max31855k", "maxim,max31855j", "maxim,max31855n",
"maxim,max31855s", "maxim,max31855t", "maxim,max31855e",
"maxim,max31855r"; the generic "max,max31855" is deprecated.
- reg: SPI chip select number for the device
- spi-max-frequency: must be 4300000
- spi-cpha: must be defined for max6675 to enable SPI mode 1
Refer to spi/spi-bus.txt for generic SPI slave bindings.
Example:
max31855@0 {
compatible = "maxim,max31855k";
reg = <0>;
spi-max-frequency = <4300000>;
};
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