AMD8111_SMB_DATA
if (amdiic_write(sc, AMD8111_SMB_DATA(0), b[0]) == -1)
if (amdiic_write(sc, AMD8111_SMB_DATA(1), b[1]) == -1)
b[0] = amdiic_read(sc, AMD8111_SMB_DATA(0));
b[1] = amdiic_read(sc, AMD8111_SMB_DATA(1));