CCM_FRAC_PLL_FRAC_DIV_CTL_SHIFT
divff = (pll1 >> CCM_FRAC_PLL_FRAC_DIV_CTL_SHIFT) &
reg &= ~(CCM_FRAC_PLL_FRAC_DIV_CTL_MASK << CCM_FRAC_PLL_FRAC_DIV_CTL_SHIFT);
reg |= divff << CCM_FRAC_PLL_FRAC_DIV_CTL_SHIFT;