The analog audio works fine under raspbian, but openSUSE Yast does not find any audio at all under hardware scan.
I believe the required module is snd-bcm2835, and this is found to be present:

Code:
> lsmod | grep snd
snd_bcm2835            36864  0
snd_soc_core          241664  1 vc4
ac97_bus               16384  1 snd_soc_core
snd_pcm_dmaengine      16384  1 snd_soc_core
snd_pcm               151552  4 vc4,snd_pcm_dmaengine,snd_bcm2835,snd_soc_core
snd_timer              36864  1 snd_pcm
snd                   106496  6 snd_timer,snd_bcm2835,snd_soc_core,snd_pcm
soundcore              20480  1 snd
vchiq                 348160  1 snd_bcm2835

# modinfo snd-bcm2835 
filename:       /lib/modules/4.12.14-lp150.12.4-default/kernel/drivers/staging/vc04_services/bcm2835-audio/snd-bcm2835.ko
license:        GPL
description:    Alsa driver for BCM2835 chip
author:         Dom Cobley
suserelease:    openSUSE Leap 15.0
srcversion:     F1CFAFE2A29787821439E26
alias:          of:N*T*Cbrcm,bcm2835-audioC*
alias:          of:N*T*Cbrcm,bcm2835-audio
depends:        snd-pcm,vchiq,snd
staging:        Y
intree:         Y
vermagic:       4.12.14-lp150.12.4-default SMP mod_unload modversions aarch64
parm:           force_bulk:Force use of vchiq bulk for audio (bool)
parm:           enable_hdmi:Enables HDMI virtual audio device (bool)
parm:           enable_headphones:Enables Headphones virtual audio device (bool)
parm:           enable_compat_alsa:Enables ALSA compatibility virtual audio device (bool)

# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: vc4hdmi [vc4-hdmi], device 0: MAI PCM vc4-hdmi-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

> amixer cset numid=3 1
numid=3,iface=MIXER,name='Master Playback Volume'
  ; type=INTEGER,access=rw------,values=2,min=0,max=65536,step=1
  : values=1,1

> aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: vc4hdmi [vc4-hdmi], device 0: MAI PCM vc4-hdmi-hifi-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

cat /proc/asound/devices 
  2: [ 0]   : control
  3: [ 0- 0]: digital audio playback
 33:        : timer
So it looks like the system can find access to an HDMI audio but not analog, and Yast sees no audio at all.
I wonder if perhaps the module has been compiled with only HDMI in mind?