RK3036_PLLCON2_FRAC_SHIFT
rate->frac = ((pllcon >> RK3036_PLLCON2_FRAC_SHIFT)
pllcon &= ~(RK3036_PLLCON2_FRAC_MASK << RK3036_PLLCON2_FRAC_SHIFT);
pllcon |= rate->frac << RK3036_PLLCON2_FRAC_SHIFT;