On Wed, Sep 03, 2008 at 07:32:51PM +0530, ext Arun KS wrote:
> Hi all,
>
> I am trying to write an ASOC driver for tlv320aic23 on 5912osk.
> When i do an aplay, the system is hanging.
> Later i found that it is hanging when mcbsp1 is requested in funcion
> omap_mcbsp_dai_startup in file sound/soc/omap/omap-mcbsp.c
>
> The reason is that the unused clocks are switched off during booting.
>
> So i decided to disable the option (reset unused clocks during boot) from
> system type -> TI OMAP Implementations in menuconfig.
>
> But still its not working.
>
> When i give omap_mcbsp_request(0) in init function of my machine
> driver, i m able
> to get the requested mcbsp.
Take a look at sound/soc/omap/n810.c, under n810_startup() it calls
clk_enable().
Maybe you should do the same. But since tlv320aic23 is used by more than
one machine you could make the clk_enable be board specific.
But one step at a time, take a look here:
71 static int n810_startup(struct snd_pcm_substream *substream)
72 {
73 struct snd_soc_pcm_runtime *rtd = substream->private_data;
74 struct snd_soc_codec *codec = rtd->socdev->codec;
75
76 n810_ext_control(codec);
77 return clk_enable(sys_clkout2);
78 }
--
balbi
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