From: Dong Aisheng Date: Fri, 20 Jul 2012 09:20:25 +0000 (+0800) Subject: ASoC: mxs-saif: set a base clock rate for EXTMASTER mode work X-Git-Tag: accepted/tizen/common/20141203.182822~3608^2~103^2~12 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d0ba4c014934cb56f1eabb481ff8026b6d49d33c;p=platform%2Fkernel%2Flinux-arm64.git ASoC: mxs-saif: set a base clock rate for EXTMASTER mode work 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 Acked-by: Shawn Guo Signed-off-by: Mark Brown --- diff --git a/sound/soc/mxs/mxs-saif.c b/sound/soc/mxs/mxs-saif.c index fdbb36a..b303071 100644 --- a/sound/soc/mxs/mxs-saif.c +++ b/sound/soc/mxs/mxs-saif.c @@ -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);