SSCR0_EDSS
| (bits > 16 ? SSCR0_EDSS : 0);
sscr0 &= ~(SSCR0_MOD | SSCR0_SlotsPerFrm(8) | SSCR0_EDSS | SSCR0_DSS);
sscr0 |= SSCR0_EDSS | SSCR0_DataSize(slot_width - 16);
sscr0 = pxa_ssp_read_reg(ssp, SSCR0) & ~(SSCR0_DSS | SSCR0_EDSS);
sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(8));
sscr0 |= (SSCR0_EDSS | SSCR0_DataSize(16));