On Fri, 2007-06-15 at 13:46 -0500, Paul Kavan wrote: > > Now to making the driver once the code is done. I am relatively new to > writing linux drivers. In the 6 or so that I have written, I usually > cross-compile them as modules and then insmod them. I have tried that here > and am getting a strange warning that I am unsure of. I have a pretty > simple Makefile and when I execute it, I get: > > make ARCH=arm CROSS_COMPILE=arm-linux- > make -C ~/Linux_Builds/linux-2.6.21.5M=/home/grhuser/Door_Access_System/Remotes/Driver/sound > modules > make[1]: Entering directory `/home/grhuser/Linux_Builds/linux- 2.6.21.5' > CC [M] > /home/grhuser/Door_Access_System/Remotes/Driver/sound/grh_ek_w6811.o > Building modules, stage 2. > MODPOST 1 modules > WARNING: "at91_ssc_dai" > [/home/grhuser/Door_Access_System/Remotes/Driver/sound/grh_ek_w6811.ko] > undefined! > CC > /home/grhuser/Door_Access_System/Remotes/Driver/sound/grh_ek_w6811.mod.o > LD [M] > /home/grhuser/Door_Access_System/Remotes/Driver/sound/grh_ek_w6811.ko > make[1]: Leaving directory `/home/grhuser/Linux_Builds/linux- 2.6.21.5' > It looks like the AT91 platform code is not being built. i.e. at91-ssc, at91-pcm. > As you can see, I am using linux-2.6.21.5 I have ALSA checked and AT91-SoC > checked in my .config file. For this attempt to build the driver, I have a > separate folder than contains: at91-ssc.h and at91-pcm.h. If there is a more > correct way to do this and be able to debug it, please let me know. > It's probably going to be easier in the long run to copy your driver code to linux/sound/soc/at91 and then add an entry for your driver in the linux/sound/soc/at91/ Makefile & Kconfig e.g. for Kconfig config SND_AT91_SOC_ETI_B1_WM8731 tristate "SoC Audio support for WM8731-based Endrelia ETI-B1 boards" depends on SND_AT91_SOC && (MACH_ETI_B1 || MACH_ETI_C1) select SND_AT91_SOC_SSC select SND_SOC_WM8731 help Say Y if you want to add support for SoC audio on WM8731-based Endrelia Technologies Inc ETI-B1 or ETI-C1 boards. This can then tell the build system (via the select keyword above) that your board driver depends on the AT91 platform driver and your codec. Liam _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
