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authorJohannes Berg <johannes@sipsolutions.net>2006-10-05 15:05:34 +0200
committerJaroslav Kysela <perex@suse.cz>2007-02-09 09:00:06 +0100
commit12b131c4cf3eb1dc8a60082a434b7b100774c2e7 (patch)
tree3c7269d2617724710d35ad8543dbe0713c61a58e
parentfeaa6a74d852be40c0e717471aa92eead012052c (diff)
downloadlinux-2.6.34-ux500-12b131c4cf3eb1dc8a60082a434b7b100774c2e7.tar.gz
[ALSA] allow registering an alsa device with struct device pointer
This patch adds snd_register_device_for_dev taking a struct device pointer to link the new device to and makes snd_register_device a simple static inline wrapper around it. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
-rw-r--r--include/sound/core.h37
-rw-r--r--sound/core/sound.c15
2 files changed, 42 insertions, 10 deletions
diff --git a/include/sound/core.h b/include/sound/core.h
index 521f036cce9..83a575a29d0 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -211,9 +211,40 @@ extern struct class *sound_class;
void snd_request_card(int card);
-int snd_register_device(int type, struct snd_card *card, int dev,
- const struct file_operations *f_ops, void *private_data,
- const char *name);
+int snd_register_device_for_dev(int type, struct snd_card *card,
+ int dev,
+ const struct file_operations *f_ops,
+ void *private_data,
+ const char *name,
+ struct device *device);
+
+/**
+ * snd_register_device - Register the ALSA device file for the card
+ * @type: the device type, SNDRV_DEVICE_TYPE_XXX
+ * @card: the card instance
+ * @dev: the device index
+ * @f_ops: the file operations
+ * @private_data: user pointer for f_ops->open()
+ * @name: the device file name
+ *
+ * Registers an ALSA device file for the given card.
+ * The operators have to be set in reg parameter.
+ *
+ * This function uses the card's device pointer to link to the
+ * correct &struct device.
+ *
+ * Returns zero if successful, or a negative error code on failure.
+ */
+static inline int snd_register_device(int type, struct snd_card *card, int dev,
+ const struct file_operations *f_ops,
+ void *private_data,
+ const char *name)
+{
+ return snd_register_device_for_dev(type, card, dev, f_ops,
+ private_data, name,
+ card ? card->dev : NULL);
+}
+
int snd_unregister_device(int type, struct snd_card *card, int dev);
void *snd_lookup_minor_data(unsigned int minor, int type);
int snd_add_device_sysfs_file(int type, struct snd_card *card, int dev,
diff --git a/sound/core/sound.c b/sound/core/sound.c
index 82a61c67cf3..4084de06412 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -219,26 +219,27 @@ static int snd_kernel_minor(int type, struct snd_card *card, int dev)
#endif
/**
- * snd_register_device - Register the ALSA device file for the card
+ * snd_register_device_for_dev - Register the ALSA device file for the card
* @type: the device type, SNDRV_DEVICE_TYPE_XXX
* @card: the card instance
* @dev: the device index
* @f_ops: the file operations
* @private_data: user pointer for f_ops->open()
* @name: the device file name
+ * @device: the &struct device to link this new device to
*
* Registers an ALSA device file for the given card.
* The operators have to be set in reg parameter.
*
- * Retrurns zero if successful, or a negative error code on failure.
+ * Returns zero if successful, or a negative error code on failure.
*/
-int snd_register_device(int type, struct snd_card *card, int dev,
- const struct file_operations *f_ops, void *private_data,
- const char *name)
+int snd_register_device_for_dev(int type, struct snd_card *card, int dev,
+ const struct file_operations *f_ops,
+ void *private_data,
+ const char *name, struct device *device)
{
int minor;
struct snd_minor *preg;
- struct device *device = snd_card_get_device_link(card);
snd_assert(name, return -EINVAL);
preg = kmalloc(sizeof *preg, GFP_KERNEL);
@@ -272,7 +273,7 @@ int snd_register_device(int type, struct snd_card *card, int dev,
return 0;
}
-EXPORT_SYMBOL(snd_register_device);
+EXPORT_SYMBOL(snd_register_device_for_dev);
/* find the matching minor record
* return the index of snd_minor, or -1 if not found