SCKCR2
#define DIVCA55C0 CONF_PACK(SCKCR2, 8, 1)
#define DIVCA55C1 CONF_PACK(SCKCR2, 9, 1)
#define DIVCA55C2 CONF_PACK(SCKCR2, 10, 1)
#define DIVCA55C3 CONF_PACK(SCKCR2, 11, 1)
#define DIVCA55S CONF_PACK(SCKCR2, 12, 1)
#define DIVSPI3ASYNC CONF_PACK(SCKCR2, 16, 2)
#define DIVSCI5ASYNC CONF_PACK(SCKCR2, 18, 2)