Commit 4b440be6 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

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: default avatarJaroslav Kysela <perex@perex.cz>
Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 23c18d4b

include/sound/core.h

+2 −0
Original line number Diff line number Diff line
@@ -207,6 +207,8 @@ extern struct class *sound_class; 


void snd_request_card(int card);



void snd_device_initialize(struct device *dev, struct snd_card *card);



int snd_register_device_for_dev(int type, struct snd_card *card, int dev,

				const struct file_operations *f_ops,

				void *private_data, struct device *device,

sound/core/init.c

+23 −0
Original line number Diff line number Diff line
@@ -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[];