Kernel as .deb package

Anything that has the potential to make it easier to set up this card more flexibly is surely of interest. Please do upload or post a link.

Here's the kernel .deb package.  This is kernel 3.12.33 from https://github.com/CirrusLogic/rpi-linux, compiled and tested under Raspbian 2014-12-24 with the default configuration file supplied by Cirrus Logic.

To install:

sudo dpkg -i linux-image-3.12.33cirrus_3.12.33cirrus-1_armhf.deb # install package

sudo mv /boot/vmlinuz-3.12.33cirrus /boot/kernel_new.img         # rename kernel

sudo rm /boot/*3.12.33cirrus                                     # delete superfluous files

and edit /boot/config.txt to use the new kernel:

# Use new kernel:

kernel=kernel_new.img

I've always been interested, how do you make a deb package?

Tim, that's tremendous. Thank you so much. As I've said in a previous post, I'm very green still with Linux, despite having used Ubuntu for years now. So please forgive what may seem some pretty dumb questions! Am I correct in thinking, from what you said in your initial post, that in theory it should be possible to install your deb package into any existing Linux based distribution running on the RpiB+ (eg OpenELEC, Runeaudio, Rasbian) to enable them to make use of the card? Could you add an additional line or two at the beginning of your instructions to cover getting the deb package on to the Pi ready to install (eg download to another device then copy and paste - in which case where to? Or use apt-get from the Pi.....?) Again, many thanks for your contribution on this.

Nick

Hi Nick,

It doesn't matter where you put the .deb file.  The following will download it:

wget "http://www.element14.com/community/servlet/JiveServlet/download/140283-165536/linux-image-3.12.33cirrus_3.12.33cirrus-1_armhf.deb.zip"

This message board has automatically zipped the file (even though Debian packages are already compressed), so unzip it before installing:

unzip linux-image-3.12.33cirrus_3.12.33cirrus-1_armhf.deb.zip

After installation you can delete the .deb file if you want.  The kernel was compiled for Rasbian, and may or may not work with other distributions.  Let us know if you try it.

Hi Tim,

The same kernel is now available with realtime capabilities (e.g. for live music performance) and support for the older Wolfson card and more up-to-date Cirrus Cards.

Cirrus cards haven't been tested yet with this kernel 'cause I don't own one :-(

Only tested with Wolfson audio card. Here it works fine. Instructions how to install and download can be found here ->

https://blog.georgmill.de/2015/02/18/update-for-wolfson-audio-card-on-raspberry-pi/

Have fun.