Cirrus Logic driver

Building the raspberry pi code is documented at Kernel Building.  I wanted to start with stable linux 4.5 from git.kernel.org because the Cirrus Logic driver is in the mainline starting with v4.5.  But wanting quick results sent me to use a precompiled 4.1.19 kernel from Matthias "Hias" Reichl.
  There are lots of issues with getting the Cirrus Logic Audio Card working.  Hias has a version at RPi Linux driver for Wolfson / Cirrus Logic Audio Card

I used the precompiled version found there.

wget http://www.horus.com/~hias/tmp/cirrus/cirrus-linux-4.1.19.tgz

sudo tar zxf cirrus-linux-4.1.18.tgz -C /

Add the following lines to /boot/config.txt

dtoverlay=rpi-cirrus-wm5102
dtoverlay=i2s-mmap 
 
And add the following lines to /etc/modprobe.d/cirrus.conf

softdep arizona-spi pre: arizona-ldo1 
softdep spi-bcm2708 pre: fixed 
softdep spi-bcm2835 pre: fixed 

Rebooting and note this works.
dmesg | grep arizona
[    7.722414] arizona spi0.1: WM5102 revision C
 
aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpiwsp [snd_rpi_wsp], device 0: WM5102 AiFi wm5102-aif1-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
 
Thanks Hias!