RWDLEN2
regs->rcr2 |= RWDLEN2(OMAP_MCBSP_WORD_16);
regs->rcr2 |= RWDLEN2(OMAP_MCBSP_WORD_32);
regs->rcr2 &= ~(RPHASE | RFRLEN2(0x7f) | RWDLEN2(7));