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ASoC: Add bit clock rate calculator utility functions

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Many devices need to calculate the bit clock rate desired to
work out the clock configuration required for the device.
Provide utility functions to do this using both hw_params
structures and raw numbers.

Signed-off-by: Mark Brown <[email protected]>
Acked-by: Liam Girdwood <[email protected]>
This commit is contained in:
Mark Brown 2009-11-10 16:08:04 +00:00
commit 7aae816dae
3 changed files with 74 additions and 1 deletions
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5
include/sound/soc.h
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@ -227,6 +227,11 @@ int snd_soc_codec_set_cache_io(struct snd_soc_codec *codec,
void snd_soc_free_pcms(struct snd_soc_device *socdev);
int snd_soc_new_pcms(struct snd_soc_device *socdev, int idx, const char *xid);
/* Utility functions to get clock rates from various things */
int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots);
int snd_soc_params_to_frame_size(struct snd_pcm_hw_params *params);
int snd_soc_params_to_bclk(struct snd_pcm_hw_params *parms);
/* set runtime hw params */
int snd_soc_set_runtime_hwparams(struct snd_pcm_substream *substream,
const struct snd_pcm_hardware *hw);