Cut and paste this URL to share the unmodified register and value:
https://regviz.com/r/Atmel/AT91SAM9G25/HSMCI1/MR#0x0
Mode Register
Clock Divider
Power Saving Divider
Read Proof Enable
Write Proof Enable
Force Byte Transfer
Padding Value
Clock divider is odd
https://github.com/cmsis-svd/cmsis-svd-data