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 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html