Hi Timur, On Tue, 2007-04-17 at 16:01 -0500, Timur Tabi wrote: > I've never worked with ALSA before, but I'm about to start developing on an ALSA driver > for our hardware, which has a CS4270 on it attached via an I2S interface. After scanning > the source code and mailing lists, I see no mention of the CS4270. So does that mean I > would need to write an ASoC codec driver for the CS4270? 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) I assume your either targeting the i.MX21/27 or i.MX31 ? 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. > 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 Liam _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
