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Subject[PATCH] audio: tlv320aic26: fix PLL register configuration
Date
The current PLL configuration code for the tlc320aic26 codec appears to assume a
hardcoded system clock of 12 MHz. Use the clock value provided by the DAI_OPS
API for the calculation.

Tested using a MityDSP-L138 platform providing a 24.576 MHz clock.

Signed-off-by: Michael Williamson <michael.williamson@criticallink.com>
---
Against 2f666bcf757cb72549f360ef6da02f03620a48b6 of Linus' tree.
I'm not sure if I have this on all the right lists / CC's. get_maintainer.pl
generated a *pile* of addresses...

sound/soc/codecs/tlv320aic26.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/sound/soc/codecs/tlv320aic26.c b/sound/soc/codecs/tlv320aic26.c
index e2a7608..51e060b 100644
--- a/sound/soc/codecs/tlv320aic26.c
+++ b/sound/soc/codecs/tlv320aic26.c
@@ -163,8 +163,10 @@ static int aic26_hw_params(struct snd_pcm_substream *substream,

/* Configure PLL */
pval = 1;
- jval = (fsref == 44100) ? 7 : 8;
- dval = (fsref == 44100) ? 5264 : 1920;
+ jval = fsref / (aic26->mclk / 2048);
+ dval = fsref - jval * (aic26->mclk / 2048);
+ dval = 10000 * dval / (aic26->mclk / 2048);
+ dev_dbg(&aic26->spi->dev, "Setting PLLM to %d.%04d\n", jval, dval);
qval = 0;
reg = 0x8000 | qval << 11 | pval << 8 | jval << 2;
aic26_reg_write(codec, AIC26_REG_PLL_PROG1, reg);
--
1.7.0.4


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