Re: [PATCH v2 2/4] iio: core: Add IIO_EV_INFO_SCALE to event info

[Taha Ed-Dafili <0rayn.dev@gmail.com>]

Hi David,

Thanks for the feedback. You're right—"missing" was poor wording; I’ll
rephrase to "implement support in the core" for v3 to reflect that this
is an infrastructure addition.

Regarding existing users, the current lack of IIO_EV_INFO_SCALE in the core
forces developers into manual workarounds to stay ABI-compliant. For
instance, in drivers/iio/accel/mma8452.c, the developer used
IIO_CONST_ATTR_NAMED to create a manual in_accel_scale and linked it via
.event_attrs. This approach is static and bypasses the standard event_spec
infrastructure.

My goal with adding IIO_EV_INFO_SCALE is to provide a standard path to
report these scales dynamically through read_event_value(), ensuring ABI
compliance without manual sysfs boilerplate.

Does this core infrastructure approach seem like the right architectural
path, or would you prefer I stick to a driver-level attribute for the
ADXL345? Regardless of the path chosen, I will address your other comments
in the next version: I'll fix the "in scale" typo and add the new scale
entries to the adxl345 documentation table.

Thanks,
Taha