Please expose min/max/default values in header files

For example:

https://github.com/analogdevicesinc/no-OS/blob/master/ad9361/sw/ad9361.c#L1610

     if (atten_mdb > 89750) /* 89.75 dB */

It would be useful for driver users to have this max value exposed in the .h.



Regards,

Xavier