summaryrefslogtreecommitdiff
path: root/sound/core/init.c
diff options
context:
space:
mode:
Diffstat (limited to 'sound/core/init.c')
-rw-r--r--sound/core/init.c54
1 files changed, 48 insertions, 6 deletions
diff --git a/sound/core/init.c b/sound/core/init.c
index 074875d68c15..35419054821c 100644
--- a/sound/core/init.c
+++ b/sound/core/init.c
@@ -157,8 +157,31 @@ static int get_slot_from_bitmask(int mask, int (*check)(struct module *, int),
return mask; /* unchanged */
}
+/* the default release callback set in snd_device_initialize() below;
+ * this is just NOP for now, as almost all jobs are already done in
+ * dev_free callback of snd_device chain instead.
+ */
+static void default_release(struct device *dev)
+{
+}
+
+/**
+ * snd_device_initialize - Initialize struct device for sound devices
+ * @dev: device to initialize
+ * @card: card to assign, optional
+ */
+void snd_device_initialize(struct device *dev, struct snd_card *card)
+{
+ device_initialize(dev);
+ if (card)
+ dev->parent = &card->card_dev;
+ dev->class = sound_class;
+ dev->release = default_release;
+}
+EXPORT_SYMBOL_GPL(snd_device_initialize);
+
static int snd_card_do_free(struct snd_card *card);
-static const struct attribute_group *card_dev_attr_groups[];
+static const struct attribute_group card_dev_attr_group;
static void release_card_device(struct device *dev)
{
@@ -246,7 +269,8 @@ int snd_card_new(struct device *parent, int idx, const char *xid,
card->card_dev.parent = parent;
card->card_dev.class = sound_class;
card->card_dev.release = release_card_device;
- card->card_dev.groups = card_dev_attr_groups;
+ card->card_dev.groups = card->dev_groups;
+ card->dev_groups[0] = &card_dev_attr_group;
err = kobject_set_name(&card->card_dev.kobj, "card%d", idx);
if (err < 0)
goto __error;
@@ -677,14 +701,32 @@ static struct attribute *card_dev_attrs[] = {
NULL
};
-static struct attribute_group card_dev_attr_group = {
+static const struct attribute_group card_dev_attr_group = {
.attrs = card_dev_attrs,
};
-static const struct attribute_group *card_dev_attr_groups[] = {
- &card_dev_attr_group,
- NULL
+/**
+ * snd_card_add_dev_attr - Append a new sysfs attribute group to card
+ * @card: card instance
+ * @group: attribute group to append
+ */
+int snd_card_add_dev_attr(struct snd_card *card,
+ const struct attribute_group *group)
+{
+ int i;
+
+ /* loop for (arraysize-1) here to keep NULL at the last entry */
+ for (i = 0; i < ARRAY_SIZE(card->dev_groups) - 1; i++) {
+ if (!card->dev_groups[i]) {
+ card->dev_groups[i] = group;
+ return 0;
+ }
+ }
+
+ dev_err(card->dev, "Too many groups assigned\n");
+ return -ENOSPC;
};
+EXPORT_SYMBOL_GPL(snd_card_add_dev_attr);
/**
* snd_card_register - register the soundcard