PLL2650XX_MDIV_SHIFT
mdiv = (pll_con0 >> PLL2650XX_MDIV_SHIFT) & PLL2650XX_MDIV_MASK;
pll_con0 &= ~(PLL2650XX_MDIV_MASK << PLL2650XX_MDIV_SHIFT |
pll_con0 |= rate->mdiv << PLL2650XX_MDIV_SHIFT;