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454f60336d
Create new format types for iio values (IIO_VAL_DECIMAL64_*), which defines the representation of fixed decimal point values into a single 64-bit number. This new format increases the range of represented values, allowing for integer parts greater than 2^32, as bits are not "wasted" in the fractional part, which can be seen in IIO_VAL_INT_PLUS_MICRO and IIO_VAL_INT_PLUS_NANO. Helpers are created to compose and decompose 64-bit decimals into integer values used in IIO formatting interfaces, which creates consistency and avoid error-prone manual assignments when using wordpart macros. When doing the parsing, kstrtodec64() is used with the scale defined by the specific decimal format type. Signed-off-by: Rodrigo Alencar <rodrigo.alencar@analog.com> Reviewed-by: Nuno Sá <nuno.sa@analog.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>