A_MC5_INT_CAUSE
t1_write_reg_4(mc5->adapter, A_MC5_INT_CAUSE, 0xffffffff);
t1_write_reg_4(mc5->adapter, A_MC5_INT_CAUSE, 0xffffffff);
u32 cause = t1_read_reg_4(adap, A_MC5_INT_CAUSE);
t1_write_reg_4(adap, A_MC5_INT_CAUSE, cause);