PLL2650X_M_SHIFT
mdiv = (pll_con0 >> PLL2650X_M_SHIFT) & PLL2650X_M_MASK;
con0 &= ~((PLL2650X_M_MASK << PLL2650X_M_SHIFT) |
con0 |= (rate->mdiv << PLL2650X_M_SHIFT) |