diff options
Diffstat (limited to 'sound/soc/codecs/max9867.c')
| -rw-r--r-- | sound/soc/codecs/max9867.c | 33 |
1 files changed, 30 insertions, 3 deletions
diff --git a/sound/soc/codecs/max9867.c b/sound/soc/codecs/max9867.c index 6d2941a9dbd6..e161ab037bf7 100644 --- a/sound/soc/codecs/max9867.c +++ b/sound/soc/codecs/max9867.c @@ -323,7 +323,7 @@ static int max9867_startup(struct snd_pcm_substream *substream, static int max9867_dai_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { - int value; + int value, freq = 0; unsigned long int rate, ratio; struct snd_soc_component *component = dai->component; struct max9867_priv *max9867 = snd_soc_component_get_drvdata(component); @@ -373,6 +373,35 @@ static int max9867_dai_hw_params(struct snd_pcm_substream *substream, } regmap_update_bits(max9867->regmap, MAX9867_IFC1B, MAX9867_IFC1B_BCLK_MASK, value); + + /* Exact integer mode available for 8kHz and 16kHz sample rates + * and certain PCLK (prescaled MCLK) values. + */ + if (params_rate(params) == 8000 || + params_rate(params) == 16000) { + switch (max9867->pclk) { + case 12000000: + freq = 0x08; + break; + case 13000000: + freq = 0x0A; + break; + case 16000000: + freq = 0x0C; + break; + case 19200000: + freq = 0x0E; + break; + } + } + if (freq && params_rate(params) == 16000) + freq++; + + /* If exact integer mode not available, the freq value + * remains zero, i.e. normal mode is used. + */ + regmap_update_bits(max9867->regmap, MAX9867_SYSCLK, + MAX9867_FREQ_MASK, freq); } else { /* * digital pll locks on to any externally supplied LRCLK signal @@ -428,8 +457,6 @@ static int max9867_set_dai_sysclk(struct snd_soc_dai *codec_dai, freq); max9867->sysclk = freq; value = value << MAX9867_PSCLK_SHIFT; - /* exact integer mode is not supported */ - value &= ~MAX9867_FREQ_MASK; regmap_update_bits(max9867->regmap, MAX9867_SYSCLK, MAX9867_PSCLK_MASK, value); return 0; |