Compile Wolfson Audio Card driver for kernel 3.12.y , a new try

The easy way:

# Download the binaries from here:

sha1sum   kernelAndFirmware_wolfson_rt.tar.bz2 is

76c3b38f588f09ae6a557f3065ce9dc30674615b kernelAndFirmware_wolfson_rt.tar.bz2

mkdir kernelAndFirmware_wolfson_rt

Extract:

tar -xvjf kernelAndFirmware_wolfson_rt.tar.bz2 -C kernelAndFirmware_wolfson_rt

and copy to root of the Raspberry pi.

sudo nano /boot/config.txt

change

kernel=kernel.img

to

# kernel=kernel.img

kernel=kernel_new.img

sudo sync

sudo reboot

or do it the hard way 😉

 

Read  Compile and install as described here -> http://elinux.org/RPi_Kernel_Compilation

# Download the sources
# RPI-Kernel

Download rpi-3.12.y_rt_wlfsn.tar.bz2

sha1sum rpi-3.12.y_rt_wlfsn.tar.bz2 is

523f06ab89088e9cf8384c7dd9551c2fc74b2598  rpi-3.12.y_rt_wlfsn.tar.bz2
tar -xvjf rpi-3.12.y_rt_wlfsn.tar.bz2 -C rpi-3.12.y_rt_wlfsn
cd rpi-3.12.y_rt_wlfsn
Download  rpi-3.12.y_rt_wlfsn.config into rpi-3.12.y_rt_wlfsn directory and change it to .config
export ARCH=arm
export CROSS_COMPILE=/path/to/your/tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian/bin/arm-linux-gnueabihf-
export INSTALL_MOD_PATH=/your/modules/dir/path
mv config.txt .config
make -j4  ARCH=arm CROSS_COMPILE=${CROSS_COMPILE} mrproper
make -j4  ARCH=arm CROSS_COMPILE=${CROSS_COMPILE} xconfig
# make your changes here
make -j4  ARCH=arm CROSS_COMPILE=${CROSS_COMPILE}
make -j4  ARCH=arm CROSS_COMPILE=${CROSS_COMPILE} modules
make -j4  ARCH=arm CROSS_COMPILE=${CROSS_COMPILE} modules_install
# Have fun.

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