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

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

Documentation/devicetree/bindings/iio/temperature/maxim,max31855k.yaml

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# 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;

        };

    };

...

Documentation/devicetree/bindings/iio/temperature/maxim_thermocouple.txt

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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>;

	};