Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Atmel/ATSAMA5D31/MPDDRC/LPDDR2_TIM_CAL#0x0
MPDDRC LPDDR2 Timing Calibration Register
ZQ Calibration Short
https://github.com/cmsis-svd/cmsis-svd-data