[ALSA] alsa core: add struct device pointer to struct snd_pcm

[linux-2.6] / include / sound / core.h

diff --git a/include/sound/core.h b/include/sound/core.h
index a994bea09cd6debedcf08bd740ca8a0cde227ec4..83a575a29d0f347f09749e397fa06c67eec90594 100644 (file)
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -132,8 +132,10 @@ struct snd_card {
        int shutdown;                   /* this card is going down */
        int free_on_last_close;         /* free in context of file_release */
        wait_queue_head_t shutdown_sleep;
-       struct device *parent;
-       struct device *dev;
+       struct device *dev;             /* device assigned to this card */
+#ifndef CONFIG_SYSFS_DEPRECATED
+       struct device *card_dev;        /* cardX object for sysfs */
+#endif
 
 #ifdef CONFIG_PM
        unsigned int power_state;       /* power state */
@@ -191,6 +193,16 @@ struct snd_minor {
        struct device *dev;             /* device for sysfs */
 };
 
+/* return a device pointer linked to each sound device as a parent */
+static inline struct device *snd_card_get_device_link(struct snd_card *card)
+{
+#ifdef CONFIG_SYSFS_DEPRECATED
+       return card ? card->dev : NULL;
+#else
+       return card ? card->card_dev : NULL;
+#endif
+}
+
 /* sound.c */
 
 extern int snd_major;
@@ -199,9 +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,
@@ -257,7 +300,7 @@ int snd_card_file_add(struct snd_card *card, struct file *file);
 int snd_card_file_remove(struct snd_card *card, struct file *file);
 
 #ifndef snd_card_set_dev
-#define snd_card_set_dev(card,devptr) ((card)->parent = (devptr))
+#define snd_card_set_dev(card,devptr) ((card)->dev = (devptr))
 #endif
 
 /* device.c */