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Diffstat (limited to 'kernel/sound/soc/soc-ac97.c')
-rw-r--r--kernel/sound/soc/soc-ac97.c30
1 files changed, 25 insertions, 5 deletions
diff --git a/kernel/sound/soc/soc-ac97.c b/kernel/sound/soc/soc-ac97.c
index 08d7259bb..d40efc9fe 100644
--- a/kernel/sound/soc/soc-ac97.c
+++ b/kernel/sound/soc/soc-ac97.c
@@ -85,10 +85,19 @@ EXPORT_SYMBOL(snd_soc_alloc_ac97_codec);
/**
* snd_soc_new_ac97_codec - initailise AC97 device
* @codec: audio codec
+ * @id: The expected device ID
+ * @id_mask: Mask that is applied to the device ID before comparing with @id
*
* Initialises AC97 codec resources for use by ad-hoc devices only.
+ *
+ * If @id is not 0 this function will reset the device, then read the ID from
+ * the device and check if it matches the expected ID. If it doesn't match an
+ * error will be returned and device will not be registered.
+ *
+ * Returns: A PTR_ERR() on failure or a valid snd_ac97 struct on success.
*/
-struct snd_ac97 *snd_soc_new_ac97_codec(struct snd_soc_codec *codec)
+struct snd_ac97 *snd_soc_new_ac97_codec(struct snd_soc_codec *codec,
+ unsigned int id, unsigned int id_mask)
{
struct snd_ac97 *ac97;
int ret;
@@ -97,13 +106,24 @@ struct snd_ac97 *snd_soc_new_ac97_codec(struct snd_soc_codec *codec)
if (IS_ERR(ac97))
return ac97;
- ret = device_add(&ac97->dev);
- if (ret) {
- put_device(&ac97->dev);
- return ERR_PTR(ret);
+ if (id) {
+ ret = snd_ac97_reset(ac97, false, id, id_mask);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to reset AC97 device: %d\n",
+ ret);
+ goto err_put_device;
+ }
}
+ ret = device_add(&ac97->dev);
+ if (ret)
+ goto err_put_device;
+
return ac97;
+
+err_put_device:
+ put_device(&ac97->dev);
+ return ERR_PTR(ret);
}
EXPORT_SYMBOL_GPL(snd_soc_new_ac97_codec);