APP2_UL
if (read_iir & APP2_UL) {
dc->last_ier &= ~APP2_UL;
writew(APP2_UL, dc->reg_fcr);
dc->last_ier = dc->last_ier | APP2_UL;
static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL};
{~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL};
if (interrupt & APP2_UL)