• Federico Vaga's avatar
    kernel: add WR manual offset for old calibration data · 0630edbb
    Federico Vaga authored
    Apparently the White-Rabbit calibration offset is wrong for the FMC-TDC
    mezzanines calibrated before 2018-01-01 (in the future, we are still fixing
    the issue). this patch allows to overwrite that value.
    
    It adds also the carrier components. The total WR offset depends on the carrier
    as well. The calibration is "always" done with a SPEC, so in principle you
    should add/subtract a carrier offset only if you are using a board
    different than SPEC
    
    Note
    The problem is not easy to spot and there are many FMC-TDC mezzanine produced
    and already calibrated. The good thing to do is to replace the value on the
    eeprom for all of them, but we cannot. So, we need this hack
    Signed-off-by: Federico Vaga's avatarFederico Vaga <federico.vaga@cern.ch>
    0630edbb
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