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ASoC: mxs-saif: set a base clock rate for EXTMASTER mode work

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Set an initial clock rate for the saif internal logic to work
properly. This is important when working in EXTMASTER mode that
uses the other saif's BITCLK&LRCLK but it still needs a basic
clock which should be fast enough for the internal logic.

Signed-off-by: Dong Aisheng <dong.aisheng@linaro.org>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Dong Aisheng 2012-07-20 17:20:25 +08:00 committed by Mark Brown
parent c2e1d9073f
commit d0ba4c0149
1 changed files with 15 additions and 1 deletions
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16
sound/soc/mxs/mxs-saif.c
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@ -427,8 +427,22 @@ static int mxs_saif_hw_params(struct snd_pcm_substream *substream,
/* prepare clk in hw_param, enable in trigger */
clk_prepare(saif->clk);
if (saif != master_saif)
if (saif != master_saif) {
/*
* Set an initial clock rate for the saif internal logic to work
* properly. This is important when working in EXTMASTER mode
* that uses the other saif's BITCLK&LRCLK but it still needs a
* basic clock which should be fast enough for the internal
* logic.
*/
clk_enable(saif->clk);
ret = clk_set_rate(saif->clk, 24000000);
clk_disable(saif->clk);
if (ret)
return ret;
clk_prepare(master_saif->clk);
}
scr = __raw_readl(saif->base + SAIF_CTRL);