FAN_DIV_FROM_REG
#define FAN_DIV_FROM_REG(reg) (1<<(((reg)&0xc0)>>6))
#define FAN_DIV_FROM_REG(reg) (1 << (reg))
#define FAN_DIV_FROM_REG(val) (1 << (((val) >> 5) & 0x03))