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ASoC: pcm512x: Rearrange to not repeat dacsrc_rate / dac_div

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Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Peter Rosin 2015-02-16 22:02:47 +01:00 committed by Mark Brown
parent c517d838eb
commit 5890bd5256
1 changed files with 10 additions and 9 deletions
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19
sound/soc/codecs/pcm512x.c
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@ -863,28 +863,29 @@ static int pcm512x_set_dividers(struct snd_soc_dai *dai,
dacsrc_rate = sck_rate;
}
osr_div = DIV_ROUND_CLOSEST(dac_rate, osr_rate);
if (osr_div > 128) {
dev_err(dev, "Failed to find OSR divider\n");
return -EINVAL;
}
dac_div = DIV_ROUND_CLOSEST(dacsrc_rate, dac_rate);
if (dac_div > 128) {
dev_err(dev, "Failed to find DAC divider\n");
return -EINVAL;
}
dac_rate = dacsrc_rate / dac_div;
ncp_div = DIV_ROUND_CLOSEST(dacsrc_rate / dac_div, 1536000);
if (ncp_div > 128 || dacsrc_rate / dac_div / ncp_div > 2048000) {
ncp_div = DIV_ROUND_CLOSEST(dac_rate, 1536000);
if (ncp_div > 128 || dac_rate / ncp_div > 2048000) {
/* run NCP no faster than 2048000 Hz, but why? */
ncp_div = DIV_ROUND_UP(dacsrc_rate / dac_div, 2048000);
ncp_div = DIV_ROUND_UP(dac_rate, 2048000);
if (ncp_div > 128) {
dev_err(dev, "Failed to find NCP divider\n");
return -EINVAL;
}
}
osr_div = DIV_ROUND_CLOSEST(dac_rate, osr_rate);
if (osr_div > 128) {
dev_err(dev, "Failed to find OSR divider\n");
return -EINVAL;
}
idac = mck_rate / (dsp_div * sample_rate);
ret = regmap_write(pcm512x->regmap, PCM512x_DSP_CLKDIV, dsp_div - 1);