[ALSA] Introduce snd_card_set_generic_dev()

ALSA Core
A new function snd_card_set_generic_dev() is introduced to add the
'generic device' support for devices without proper bus on sysfs.
It's a last resort, and should be removed in future when they have
a proper bus, instead.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 14 insertions, 1 deletions

diff --git a/sound/core/sound.c b/sound/core/sound.c
index 3271e9245490..9e76bddb2c0b 100644
--- a/sound/core/sound.c
+++ b/sound/core/sound.c
@@ -328,6 +328,10 @@ int __exit snd_minor_info_done(void)
  *  INIT PART
  */
 
+#ifdef CONFIG_SND_GENERIC_DRIVER
+extern struct device_driver snd_generic_driver;
+#endif
+
 static int __init alsa_sound_init(void)
 {
         short controlnum;
@@ -354,6 +358,9 @@ static int __init alsa_sound_init(void)
                 return -ENOMEM;
         }
         snd_info_minor_register();
+#ifdef CONFIG_SND_GENERIC_DRIVER
+        driver_register(&snd_generic_driver);
+#endif
         for (controlnum = 0; controlnum < cards_limit; controlnum++)
                 devfs_mk_cdev(MKDEV(major, controlnum<<5), S_IFCHR | device_mode, "snd/controlC%d", controlnum);
 #ifndef MODULE
@@ -369,6 +376,9 @@ static void __exit alsa_sound_exit(void)
         for (controlnum = 0; controlnum < cards_limit; controlnum++)
                 devfs_remove("snd/controlC%d", controlnum);
 
+#ifdef CONFIG_SND_GENERIC_DRIVER
+        driver_unregister(&snd_generic_driver);
+#endif
         snd_info_minor_unregister();
         snd_info_done();
         snd_memory_done();
@@ -416,10 +426,13 @@ EXPORT_SYMBOL(snd_card_register);
 EXPORT_SYMBOL(snd_component_add);
 EXPORT_SYMBOL(snd_card_file_add);
 EXPORT_SYMBOL(snd_card_file_remove);
+#ifdef CONFIG_SND_GENERIC_DRIVER
+EXPORT_SYMBOL(snd_card_set_generic_dev);
+#endif
 #ifdef CONFIG_PM
 EXPORT_SYMBOL(snd_power_wait);
 EXPORT_SYMBOL(snd_card_set_pm_callback);
-#if defined(CONFIG_PM) && defined(CONFIG_SND_GENERIC_PM)
+#ifdef CONFIG_SND_GENERIC_DRIVER
 EXPORT_SYMBOL(snd_card_set_generic_pm_callback);
 #endif
 #ifdef CONFIG_PCI