ac97_codec_dev2dev
wm97xx = devm_kzalloc(ac97_codec_dev2dev(adev),
wm97xx->dev = ac97_codec_dev2dev(adev);
return dev_get_drvdata(ac97_codec_dev2dev(adev));
dev_set_drvdata(ac97_codec_dev2dev(adev), data);