Support to config PWM as TACH in MAX31790 driver.
Add binding document for MAX31790 driver.

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Changelog:
v2 - Remove unnecessary parentheses.
   - Add more error handling.
   - Change the type of "pwm-as-tach" from u8 to u32 to match binding
     document.
   - Add dt-bindings for the MAXIM MAX31790.
v1 - Support to config PWM as TACH

Delphine CC Chiu (2):
  hwmon: max31790: support to config PWM as TACH
  dt-bindings: hwmon: add MAX31790

 .../bindings/hwmon/maxim,max31790.yaml        | 59 +++++++++++++++++++
 MAINTAINERS                                   |  6 ++
 drivers/hwmon/max31790.c                      | 58 ++++++++++++++++++
 3 files changed, 123 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/maxim,max31790.yaml

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2.25.1