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An RTD (Resistance Temperature Detector) is a kind of temperature sensor used to get a linear voltage to temperature reading within a give range (usually 0 to 100 degrees Celsius). Common types of RTDs include PT100, PT500, and PT1000. Signed-off-by: Liam Beguin <liambeguin@gmail.com> Reviewed-by: Peter Rosin <peda@axentia.se> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20220213025739.2561834-8-liambeguin@gmail.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>