PLL_FBDIV_MIN
if (fbdiv < PLL_FBDIV_MIN)
fbdiv = PLL_FBDIV_MIN;
if (fbdiv < PLL_FBDIV_MIN || fbdiv > PLL_FBDIV_MAX) {
fbdiv = clamp_t(u32, fbdiv, PLL_FBDIV_MIN, PLL_FBDIV_MAX);
m = clamp_t(u32, m, (PLL_FBDIV_MIN), (PLL_FBDIV_MAX));
fbdiv = clamp_t(u32, fbdiv, PLL_FBDIV_MIN, PLL_FBDIV_MAX);