Liam Girdwood wrote: > You will need to write a codec driver for the CS4270 and a small machine > driver for your board (there are lots of examples in my git tree). The > codec driver will export mixers, configure the digital audio interface, > setup any codec PLL's etc. The machine driver glues the codec to your > platform and does any machine specific configuration e.g. gpio, clocks, > audio mux (on i.MXxx) Thanks, that's very helpful. I assume the codec driver will be like all the others in the sound/soc/codecs/ directory, and that my codec driver will also go there? > I assume your either targeting the i.MX21/27 or i.MX31 ? Actually, I'm not allowed to say. :-) > Fwiw, I've made a start to i.MX31 ASoC DMA (based on the Freescale BSP) > and I'm actively working on this atm. dev branch is here :- > > http://opensource.wolfsonmicro.com/cgi-bin/gitweb/gitweb.cgi?p=linux-2.6-asoc;a=shortlog;h=dev > > However, I don't have any bandwidth atm to work on i.MX21. I may be able to help you with this after I'm done with my current project. By then, I should know enough about ALSA. > >> If so, does the data sheet >> (http://www.cirrus.com/en/pubs/proDatasheet/CS4270_PP1.pdf) contain enough information? >> > > I've had a quick look and I think you have all the information that will > be required for your driver. > > More docs can be found here (must add to new ALSA Wiki) :- > > http://opensource.wolfsonmicro.com/cgi-bin/gitweb/gitweb.cgi?p=linux-2.6-asoc;a=tree;f=Documentation/sound/alsa/soc;h=0e0bd3b2531b5c24a53a7cafd14046be7f15f524;hb=dev Thanks a bunch. I'll check it out today. -- Timur Tabi Linux Kernel Developer @ Freescale _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
