monitor will print the received events for:
UDEV - the event which udev sends out after rule processing
KERNEL - the kernel uevent

KERNEL[147.988235] add      /devices/platform/soc/3f804000.i2c/i2c-1/1-004c (i2c)
ACTION=add
DEVPATH=/devices/platform/soc/3f804000.i2c/i2c-1/1-004c
SUBSYSTEM=i2c
OF_NAME=pcm5122
OF_FULLNAME=/soc/i2c@7e804000/pcm5122@4c
OF_COMPATIBLE_0=ti,pcm5122
OF_COMPATIBLE_N=1
MODALIAS=of:Npcm5122T(null)Cti,pcm5122
SEQNUM=1947

KERNEL[147.988509] add      /devices/platform/soc/3f804000.i2c/i2c-1/1-004d (i2c)
ACTION=add
DEVPATH=/devices/platform/soc/3f804000.i2c/i2c-1/1-004d
SUBSYSTEM=i2c
OF_NAME=pcm5122
OF_FULLNAME=/soc/i2c@7e804000/pcm5122@4d
OF_COMPATIBLE_0=ti,pcm5122
OF_COMPATIBLE_N=1
MODALIAS=of:Npcm5122T(null)Cti,pcm5122
SEQNUM=1948

KERNEL[147.988694] add      /devices/platform/soc/soc:sound (platform)
ACTION=add
DEVPATH=/devices/platform/soc/soc:sound
SUBSYSTEM=platform
OF_NAME=sound
OF_FULLNAME=/soc/sound
OF_COMPATIBLE_0=allo,piano-dac-plus
OF_COMPATIBLE_N=1
MODALIAS=of:NsoundT(null)Callo,piano-dac-plus
SEQNUM=1949

KERNEL[147.988844] add      /devices/virtual/devlink/platform:3f200000.gpio--platform:soc:sound (devlink)
ACTION=add
DEVPATH=/devices/virtual/devlink/platform:3f200000.gpio--platform:soc:sound
SUBSYSTEM=devlink
SEQNUM=1950

UDEV  [148.003334] add      /devices/virtual/devlink/platform:3f200000.gpio--platform:soc:sound (devlink)
ACTION=add
DEVPATH=/devices/virtual/devlink/platform:3f200000.gpio--platform:soc:sound
SUBSYSTEM=devlink
SEQNUM=1950
USEC_INITIALIZED=148000417

KERNEL[148.015155] add      /bus/platform/drivers/snd-allo-piano-dac-plus (drivers)
ACTION=add
DEVPATH=/bus/platform/drivers/snd-allo-piano-dac-plus
SUBSYSTEM=drivers
SEQNUM=1951

KERNEL[148.015332] add      /module/snd_soc_allo_piano_dac_plus (module)
ACTION=add
DEVPATH=/module/snd_soc_allo_piano_dac_plus
SUBSYSTEM=module
SEQNUM=1952

UDEV  [148.015481] add      /devices/platform/soc/soc:sound (platform)
ACTION=add
DEVPATH=/devices/platform/soc/soc:sound
SUBSYSTEM=platform
OF_NAME=sound
OF_FULLNAME=/soc/sound
OF_COMPATIBLE_0=allo,piano-dac-plus
OF_COMPATIBLE_N=1
MODALIAS=of:NsoundT(null)Callo,piano-dac-plus
SEQNUM=1949
USEC_INITIALIZED=147997983

UDEV  [148.016835] add      /module/snd_soc_allo_piano_dac_plus (module)
ACTION=add
DEVPATH=/module/snd_soc_allo_piano_dac_plus
SUBSYSTEM=module
SEQNUM=1952
USEC_INITIALIZED=148016375

UDEV  [148.017098] add      /bus/platform/drivers/snd-allo-piano-dac-plus (drivers)
ACTION=add
DEVPATH=/bus/platform/drivers/snd-allo-piano-dac-plus
SUBSYSTEM=drivers
SEQNUM=1951
USEC_INITIALIZED=148016547

KERNEL[148.059035] add      /module/regmap_i2c (module)
ACTION=add
DEVPATH=/module/regmap_i2c
SUBSYSTEM=module
SEQNUM=1953

UDEV  [148.060110] add      /module/regmap_i2c (module)
ACTION=add
DEVPATH=/module/regmap_i2c
SUBSYSTEM=module
SEQNUM=1953
USEC_INITIALIZED=148059802

KERNEL[148.066728] add      /module/snd_soc_pcm512x (module)
ACTION=add
DEVPATH=/module/snd_soc_pcm512x
SUBSYSTEM=module
SEQNUM=1954

UDEV  [148.067997] add      /module/snd_soc_pcm512x (module)
ACTION=add
DEVPATH=/module/snd_soc_pcm512x
SUBSYSTEM=module
SEQNUM=1954
USEC_INITIALIZED=148067655

KERNEL[148.068997] add      /devices/virtual/devlink/regulator:regulator.0--i2c:1-004c (devlink)
ACTION=add
DEVPATH=/devices/virtual/devlink/regulator:regulator.0--i2c:1-004c
SUBSYSTEM=devlink
SEQNUM=1955

UDEV  [148.070108] add      /devices/virtual/devlink/regulator:regulator.0--i2c:1-004c (devlink)
ACTION=add
DEVPATH=/devices/virtual/devlink/regulator:regulator.0--i2c:1-004c
SUBSYSTEM=devlink
SEQNUM=1955
USEC_INITIALIZED=148069861

KERNEL[148.072582] bind     /devices/platform/soc/3f804000.i2c/i2c-1/1-004c (i2c)
ACTION=bind
DEVPATH=/devices/platform/soc/3f804000.i2c/i2c-1/1-004c
SUBSYSTEM=i2c
DRIVER=pcm512x
OF_NAME=pcm5122
OF_FULLNAME=/soc/i2c@7e804000/pcm5122@4c
OF_COMPATIBLE_0=ti,pcm5122
OF_COMPATIBLE_N=1
MODALIAS=of:Npcm5122T(null)Cti,pcm5122
SEQNUM=1956

KERNEL[148.072750] add      /devices/virtual/devlink/regulator:regulator.0--i2c:1-004d (devlink)
ACTION=add
DEVPATH=/devices/virtual/devlink/regulator:regulator.0--i2c:1-004d
SUBSYSTEM=devlink
SEQNUM=1957

UDEV  [148.073944] add      /devices/virtual/devlink/regulator:regulator.0--i2c:1-004d (devlink)
ACTION=add
DEVPATH=/devices/virtual/devlink/regulator:regulator.0--i2c:1-004d
SUBSYSTEM=devlink
SEQNUM=1957
USEC_INITIALIZED=148073751

KERNEL[148.078002] bind     /devices/platform/soc/3f804000.i2c/i2c-1/1-004d (i2c)
ACTION=bind
DEVPATH=/devices/platform/soc/3f804000.i2c/i2c-1/1-004d
SUBSYSTEM=i2c
DRIVER=pcm512x
OF_NAME=pcm5122
OF_FULLNAME=/soc/i2c@7e804000/pcm5122@4d
OF_COMPATIBLE_0=ti,pcm5122
OF_COMPATIBLE_N=1
MODALIAS=of:Npcm5122T(null)Cti,pcm5122
SEQNUM=1958

KERNEL[148.078221] add      /bus/i2c/drivers/pcm512x (drivers)
ACTION=add
DEVPATH=/bus/i2c/drivers/pcm512x
SUBSYSTEM=drivers
SEQNUM=1959

KERNEL[148.078337] add      /module/snd_soc_pcm512x_i2c (module)
ACTION=add
DEVPATH=/module/snd_soc_pcm512x_i2c
SUBSYSTEM=module
SEQNUM=1960

UDEV  [148.090361] add      /module/snd_soc_pcm512x_i2c (module)
ACTION=add
DEVPATH=/module/snd_soc_pcm512x_i2c
SUBSYSTEM=module
SEQNUM=1960
USEC_INITIALIZED=148079872

KERNEL[148.090888] add      /devices/platform/soc/soc:sound/sound/card2 (sound)
ACTION=add
DEVPATH=/devices/platform/soc/soc:sound/sound/card2
SUBSYSTEM=sound
SEQNUM=1961

UDEV  [148.091335] add      /bus/i2c/drivers/pcm512x (drivers)
ACTION=add
DEVPATH=/bus/i2c/drivers/pcm512x
SUBSYSTEM=drivers
SEQNUM=1959
USEC_INITIALIZED=148086166

KERNEL[148.091889] add      /devices/platform/soc/soc:sound/sound/card2/pcmC2D0p (sound)
ACTION=add
DEVPATH=/devices/platform/soc/soc:sound/sound/card2/pcmC2D0p
SUBSYSTEM=sound
DEVNAME=/dev/snd/pcmC2D0p
DEVTYPE=pcm
SEQNUM=1962
MAJOR=116
MINOR=7

KERNEL[148.092077] add      /devices/platform/soc/soc:sound/sound/card2/controlC2 (sound)
ACTION=add
DEVPATH=/devices/platform/soc/soc:sound/sound/card2/controlC2
SUBSYSTEM=sound
DEVNAME=/dev/snd/controlC2
SEQNUM=1963
MAJOR=116
MINOR=8

KERNEL[148.092231] bind     /devices/platform/soc/soc:sound (platform)
ACTION=bind
DEVPATH=/devices/platform/soc/soc:sound
SUBSYSTEM=platform
DRIVER=snd-allo-piano-dac-plus
OF_NAME=sound
OF_FULLNAME=/soc/sound
OF_COMPATIBLE_0=allo,piano-dac-plus
OF_COMPATIBLE_N=1
MODALIAS=of:NsoundT(null)Callo,piano-dac-plus
SEQNUM=1964

UDEV  [148.094166] add      /devices/platform/soc/3f804000.i2c/i2c-1/1-004d (i2c)
ACTION=add
DEVPATH=/devices/platform/soc/3f804000.i2c/i2c-1/1-004d
SUBSYSTEM=i2c
OF_NAME=pcm5122
OF_FULLNAME=/soc/i2c@7e804000/pcm5122@4d
OF_COMPATIBLE_0=ti,pcm5122
OF_COMPATIBLE_N=1
MODALIAS=of:Npcm5122T(null)Cti,pcm5122
SEQNUM=1948
USEC_INITIALIZED=147995401

UDEV  [148.094827] add      /devices/platform/soc/3f804000.i2c/i2c-1/1-004c (i2c)
ACTION=add
DEVPATH=/devices/platform/soc/3f804000.i2c/i2c-1/1-004c
SUBSYSTEM=i2c
OF_NAME=pcm5122
OF_FULLNAME=/soc/i2c@7e804000/pcm5122@4c
OF_COMPATIBLE_0=ti,pcm5122
OF_COMPATIBLE_N=1
MODALIAS=of:Npcm5122T(null)Cti,pcm5122
SEQNUM=1947
USEC_INITIALIZED=147993641

UDEV  [148.095081] add      /devices/platform/soc/soc:sound/sound/card2 (sound)
ACTION=add
DEVPATH=/devices/platform/soc/soc:sound/sound/card2
SUBSYSTEM=sound
SEQNUM=1961
USEC_INITIALIZED=148094152
ID_PATH=platform-soc:sound
ID_PATH_TAG=platform-soc_sound
ID_FOR_SEAT=sound-platform-soc_sound
SYSTEMD_WANTS=sound.target
TAGS=:systemd:seat:

UDEV  [148.100301] add      /devices/platform/soc/soc:sound/sound/card2/pcmC2D0p (sound)
ACTION=add
DEVPATH=/devices/platform/soc/soc:sound/sound/card2/pcmC2D0p
SUBSYSTEM=sound
DEVNAME=/dev/snd/pcmC2D0p
DEVTYPE=pcm
SEQNUM=1962
USEC_INITIALIZED=148097177
MAJOR=116
MINOR=7
TAGS=:uaccess:

KERNEL[148.107322] change   /devices/platform/soc/soc:sound/sound/card2 (sound)
ACTION=change
DEVPATH=/devices/platform/soc/soc:sound/sound/card2
SUBSYSTEM=sound
SYNTH_UUID=0
SEQNUM=1965

UDEV  [148.148799] bind     /devices/platform/soc/3f804000.i2c/i2c-1/1-004c (i2c)
ACTION=bind
DEVPATH=/devices/platform/soc/3f804000.i2c/i2c-1/1-004c
SUBSYSTEM=i2c
DRIVER=pcm512x
OF_NAME=pcm5122
OF_FULLNAME=/soc/i2c@7e804000/pcm5122@4c
OF_COMPATIBLE_0=ti,pcm5122
OF_COMPATIBLE_N=1
MODALIAS=of:Npcm5122T(null)Cti,pcm5122
SEQNUM=1956
USEC_INITIALIZED=148097817

UDEV  [148.161990] bind     /devices/platform/soc/3f804000.i2c/i2c-1/1-004d (i2c)
ACTION=bind
DEVPATH=/devices/platform/soc/3f804000.i2c/i2c-1/1-004d
SUBSYSTEM=i2c
DRIVER=pcm512x
OF_NAME=pcm5122
OF_FULLNAME=/soc/i2c@7e804000/pcm5122@4d
OF_COMPATIBLE_0=ti,pcm5122
OF_COMPATIBLE_N=1
MODALIAS=of:Npcm5122T(null)Cti,pcm5122
SEQNUM=1958
USEC_INITIALIZED=148095720