[alsa-devel] [PATCH v3] ASoC: wm8960: update pll and clock setting function

[Zidan Wang]

On Mon, Aug 10, 2015 at 09:32:46AM +0100, Charles Keepax wrote:
> On Mon, Jul 13, 2015 at 04:41:00PM +0800, Zidan Wang wrote:
> > Add sysclk auto mode. When it's sysclk auto mode, if the MCLK is
> > available for clock configure, using MCLK to provide sysclk directly,
> > otherwise, search a available pll out frequcncy and set pll.
> > 
> > Configure clock in hw_params may cause problems when using bypass style
> > paths without hw_params in machine driver getting called. So add configure
> > clock to set_bias_level.
> > 
> > Signed-off-by: Zidan Wang <zidan.wang at freescale.com>
> > ---
> <snip>
> > @@ -711,6 +785,9 @@ static int wm8960_set_bias_level_out3(struct snd_soc_codec *codec,
> >  	case SND_SOC_BIAS_PREPARE:
> >  		switch (snd_soc_codec_get_bias_level(codec)) {
> >  		case SND_SOC_BIAS_STANDBY:
> > +			ret = wm8960_configure_clocking(codec);
> > +			if (ret)
> > +				return ret;
> 
> Is it right that we are calling wm8960_configure_clocking before
> clk_prepare_enable? As configure_clocking will enable the clocks
> shouldn't mclk be available before then?
The wm8960 codec don't need to enable MCLK to write register. So i think it's ok to enable MCLK at the last moment.

Best Regards,
Zidan Wang