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author | 2015-01-29 21:32:47 +0100 | |
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committer | 2015-02-02 14:42:33 +0100 | |
commit | 4b440be667c6187717c99e4d427119fa415ced29 (patch) | |
tree | 20e9fe801416caf247eb883bec998598d32e2ce2 /sound/core/init.c | |
parent | ALSA: control: Provide a helper to look for the preferred subdevice (diff) | |
download | linux-4b440be667c6187717c99e4d427119fa415ced29.tar.gz linux-4b440be667c6187717c99e4d427119fa415ced29.tar.bz2 linux-4b440be667c6187717c99e4d427119fa415ced29.zip |
ALSA: Add a helper to initialize device
Introduce a new helper function snd_device_initialize() to initialize
the device object for sound devices.
Reviewed-by: Jaroslav Kysela <perex@perex.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/init.c')
-rw-r--r-- | sound/core/init.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/sound/core/init.c b/sound/core/init.c index 074875d68c15..96194599e82e 100644 --- a/sound/core/init.c +++ b/sound/core/init.c @@ -157,6 +157,29 @@ 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[]; |