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author | Takashi Iwai <tiwai@suse.de> | 2015-02-17 21:46:37 +0100 |
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committer | Takashi Iwai <tiwai@suse.de> | 2015-03-23 13:15:51 +0100 |
commit | e3d280fc6d42017b2379503fbda83655a05294fe (patch) | |
tree | cc89c4b22054d620163f0d6bdad901f43957dbf5 /sound/hda/hda_bus_type.c | |
parent | 3372dbdd8ca11f51be8c6a30b2bc79eb04c4a902 (diff) | |
download | linux-e3d280fc6d42017b2379503fbda83655a05294fe.tar.bz2 |
ALSA: hda - Make snd_hda_bus_type public
Define the common hd-audio driver and device types to bind over
snd_hda_bus_type publicly. This allows to implement other type of
device and driver code over hd-audio bus.
Now both struct hda_codec and struct hda_codec_driver inherit these
new struct hdac_device and struct hdac_driver, respectively.
The bus registration is done in subsys_initcall() to assure it
before any other driver registrations.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/hda/hda_bus_type.c')
-rw-r--r-- | sound/hda/hda_bus_type.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sound/hda/hda_bus_type.c b/sound/hda/hda_bus_type.c new file mode 100644 index 000000000000..519914a12e8a --- /dev/null +++ b/sound/hda/hda_bus_type.c @@ -0,0 +1,42 @@ +/* + * HD-audio bus + */ +#include <linux/init.h> +#include <linux/device.h> +#include <linux/module.h> +#include <linux/export.h> +#include <sound/hdaudio.h> + +MODULE_DESCRIPTION("HD-audio bus"); +MODULE_LICENSE("GPL"); + +static int hda_bus_match(struct device *dev, struct device_driver *drv) +{ + struct hdac_device *hdev = dev_to_hdac_dev(dev); + struct hdac_driver *hdrv = drv_to_hdac_driver(drv); + + if (hdev->type != hdrv->type) + return 0; + if (hdrv->match) + return hdrv->match(hdev, hdrv); + return 1; +} + +struct bus_type snd_hda_bus_type = { + .name = "hdaudio", + .match = hda_bus_match, +}; +EXPORT_SYMBOL_GPL(snd_hda_bus_type); + +static int __init hda_bus_init(void) +{ + return bus_register(&snd_hda_bus_type); +} + +static void __exit hda_bus_exit(void) +{ + bus_unregister(&snd_hda_bus_type); +} + +subsys_initcall(hda_bus_init); +module_exit(hda_bus_exit); |