Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Freescale Semiconductor/MK21D5WS/I2C1/FLT#0x0
FLT=0
I2C Programmable Input Glitch Filter register
I2C Programmable Filter Factor
0 (0): No filter/bypass
no description available
https://github.com/cmsis-svd/cmsis-svd-data