A_MC7_BIST_OP
t3_write_reg(adapter, mc7->offset + A_MC7_BIST_OP, V_OP(1));
t3_read_reg(adapter, mc7->offset + A_MC7_BIST_OP); /* flush */
val = t3_read_reg(adapter, mc7->offset + A_MC7_BIST_OP);