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ALSA: hda - Move generic array helpers to core lib

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This will be used by the regmap support.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
2015-03-03 17:33:10 +01:00
parent e311782acd
commit 71fc4c7ef5
5 changed files with 84 additions and 77 deletions
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33
include/sound/hdaudio.h
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@@ -21,6 +21,17 @@ struct hdac_widget_tree;
*/
extern struct bus_type snd_hda_bus_type;
/*
* generic arrays
*/
struct snd_array {
unsigned int used;
unsigned int alloced;
unsigned int elem_size;
unsigned int alloc_align;
void *list;
};
/*
* HD-audio codec base device
*/
@@ -178,4 +189,26 @@ static inline void snd_hdac_codec_link_down(struct hdac_device *codec)
clear_bit(codec->addr, &codec->bus->codec_powered);
}
/*
* generic array helpers
*/
void *snd_array_new(struct snd_array *array);
void snd_array_free(struct snd_array *array);
static inline void snd_array_init(struct snd_array *array, unsigned int size,
unsigned int align)
{
array->elem_size = size;
array->alloc_align = align;
}
static inline void *snd_array_elem(struct snd_array *array, unsigned int idx)
{
return array->list + idx * array->elem_size;
}
static inline unsigned int snd_array_index(struct snd_array *array, void *ptr)
{
return (unsigned long)(ptr - array->list) / array->elem_size;
}
#endif /* __SOUND_HDAUDIO_H */