[ARM] 4610/2: AT91: Support for STN LCD on SAM9261-EK board.

[linux-2.6-omap-h63xx.git] / sound / core / control.c

diff --git a/sound/core/control.c b/sound/core/control.c
index 1f1ab9c1b668c5704badb84379f809439b085c09..df0774c76f6fc4eba16eb5abc0863ac01bbcedbc 100644 (file)
--- a/sound/core/control.c
+++ b/sound/core/control.c
@@ -1,6 +1,6 @@
 /*
  *  Routines for driver control interface
- *  Copyright (c) by Jaroslav Kysela <perex@suse.cz>
+ *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  *
  *
  *   This program is free software; you can redistribute it and/or modify
@@ -93,15 +93,16 @@ static int snd_ctl_open(struct inode *inode, struct file *file)
 
 static void snd_ctl_empty_read_queue(struct snd_ctl_file * ctl)
 {
+       unsigned long flags;
        struct snd_kctl_event *cread;
        
-       spin_lock(&ctl->read_lock);
+       spin_lock_irqsave(&ctl->read_lock, flags);
        while (!list_empty(&ctl->events)) {
                cread = snd_kctl_event(ctl->events.next);
                list_del(&cread->list);
                kfree(cread);
        }
-       spin_unlock(&ctl->read_lock);
+       spin_unlock_irqrestore(&ctl->read_lock, flags);
 }
 
 static int snd_ctl_release(struct inode *inode, struct file *file)
@@ -716,8 +717,6 @@ int snd_ctl_elem_read(struct snd_card *card, struct snd_ctl_elem_value *control)
        return result;
 }
 
-EXPORT_SYMBOL(snd_ctl_elem_read);
-
 static int snd_ctl_elem_read_user(struct snd_card *card,
                                  struct snd_ctl_elem_value __user *_control)
 {
@@ -781,8 +780,6 @@ int snd_ctl_elem_write(struct snd_card *card, struct snd_ctl_file *file,
        return result;
 }
 
-EXPORT_SYMBOL(snd_ctl_elem_write);
-
 static int snd_ctl_elem_write_user(struct snd_ctl_file *file,
                                   struct snd_ctl_elem_value __user *_control)
 {
@@ -1486,3 +1483,30 @@ int snd_ctl_create(struct snd_card *card)
        snd_assert(card != NULL, return -ENXIO);
        return snd_device_new(card, SNDRV_DEV_CONTROL, card, &ops);
 }
+
+/*
+ * Frequently used control callbacks
+ */
+int snd_ctl_boolean_mono_info(struct snd_kcontrol *kcontrol,
+                             struct snd_ctl_elem_info *uinfo)
+{
+       uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+       uinfo->count = 1;
+       uinfo->value.integer.min = 0;
+       uinfo->value.integer.max = 1;
+       return 0;
+}
+
+EXPORT_SYMBOL(snd_ctl_boolean_mono_info);
+
+int snd_ctl_boolean_stereo_info(struct snd_kcontrol *kcontrol,
+                               struct snd_ctl_elem_info *uinfo)
+{
+       uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+       uinfo->count = 2;
+       uinfo->value.integer.min = 0;
+       uinfo->value.integer.max = 1;
+       return 0;
+}
+
+EXPORT_SYMBOL(snd_ctl_boolean_stereo_info);