FSEL_CLKSEL_24M
clkreg = FSEL_CLKSEL_24M;
phyhost |= __SHIFTIN(FSEL_CLKSEL_24M, HOST_CTRL0_FSEL_MASK);
phyotg |= __SHIFTIN(OTG_SYS_FSEL_MASK, FSEL_CLKSEL_24M);
val |= __SHIFTIN(FSEL_CLKSEL_24M, HOST_CTRL0_FSEL_MASK);