Thank you, Philip! I meanwhile noticed the tools work when I stop tpm2-abrmd and connect directly to the TPM: 
pi@raspberrypi:~ $ sudo tpm2_pcrlist -T device:/dev/tpm0
sha1 :
  0  : 0000000000000000000000000000000000000000
  1  : 0000000000000000000000000000000000000000
Please find below the information you asked for. While tpm2-abrmd is running (as root) I still get this:
pi@raspberrypi:~ $ tpm2_pcrlist
ERROR: Failed to initialize tcti context: 0x1
pi@raspberrypi:~ $ export TPM2TOOLS_TCTI_NAME=tabrmd
pi@raspberrypi:~ $ tpm2_pcrlist
ERROR: Unknown tcti, got: "tabrmd"
======== Versions:
tpm2-abrmd: 1.3.1_rc0
tpm2-tools: 3.0.3
tpm2-tss: 1.4.0
======== /dev/tpm0
pi@raspberrypi:~ $ ls -la /dev/tpm0
crw------- 1 root root 10, 224 Mar 17 21:35 /dev/tpm0
======== tpm2-abrmd LOG
root@raspberrypi:/home/pi# tpm2-abrmd
** INFO: tabrmd startup
** (process:1852): DEBUG: tcti_factory_set_property
** (process:1852): DEBUG:   PROP_TCTI_TYPE
** (process:1852): DEBUG:   value: 0x1
** (process:1852): DEBUG: tcti_factory_set_property
** (process:1852): DEBUG: TctiFactory set device_name: /dev/tpm0
** (process:1852): DEBUG: tcti_factory_set_property
** (process:1852): DEBUG: TctiFactory set socket_address:
** (process:1852): DEBUG: tcti_factory_set_property
** (process:1852): DEBUG: TctiFactory set socket_port: 2321
** INFO: logging to stdout
** (tpm2-abrmd:1852): DEBUG: tcti_factory_get_tcti
** (tpm2-abrmd:1852): DEBUG: TctiDevice set filename: /dev/tpm0
** INFO: entering g_main_loop
** INFO: init_thread_func start
** (tpm2-abrmd:1852): DEBUG: random_class_init
** (tpm2-abrmd:1852): DEBUG: opening entropy source: /dev/urandom
** (tpm2-abrmd:1852): DEBUG: reading from entropy source: /dev/urandom
** (tpm2-abrmd:1852): DEBUG: seeding rand with -1263045295
** (tpm2-abrmd:1852): DEBUG: connection_manager_set_property: 0x15c5ef0
** (tpm2-abrmd:1852): DEBUG:   max_connections: 0x1b
** (tpm2-abrmd:1852): DEBUG: ConnectionManager: 0x15c5ef0
** (tpm2-abrmd:1852): DEBUG: IpcFrontendDbus set bus_name:
** (tpm2-abrmd:1852): DEBUG: ipc_frontend_connect: 0x75b01a08
** (tpm2-abrmd:1852): DEBUG: tcti_initialize: 0x15c5200
** (tpm2-abrmd:1852): DEBUG: sapi_context_init w/ Tcti: 0x15c5200
** (tpm2-abrmd:1852): DEBUG: tcti_peek_context: 0x15c5200
** (tpm2-abrmd:1852): DEBUG: Allocating 0x1040 bytes for SAPI context
** (tpm2-abrmd:1852): DEBUG: access_broker_set_property: 0x75b0b720
** (tpm2-abrmd:1852): DEBUG:   sapi_context: 0x75b0a690
** (tpm2-abrmd:1852): DEBUG: access_broker_set_property: 0x75b0b720
** (tpm2-abrmd:1852): DEBUG:   tcti: 0x15c5200
** (tpm2-abrmd:1852): DEBUG: created AccessBroker: 0x75b0b720
** (tpm2-abrmd:1852): DEBUG: access_broker_init_tpm: 0x75b0b720
** INFO: on_bus_acquired:
** INFO: on_name_acquired:
** (tpm2-abrmd:1852): DEBUG: Got proxy object for DBus daemon.
** (tpm2-abrmd:1852): DEBUG: access_broker_get_tpm_properties_fixed
** (tpm2-abrmd:1852): DEBUG: command_attrs_class_init
** (tpm2-abrmd:1852): DEBUG: created CommandAttrs: 0x75b01260
** (tpm2-abrmd:1852): DEBUG: GetCapabilty for 0x500 commands
** (tpm2-abrmd:1852): DEBUG: got attributes for 0x5a commands
** (tpm2-abrmd:1852): DEBUG: command_source_class_init
** (tpm2-abrmd:1852): DEBUG: command_source_set_properties: 0x75b02c50
** (tpm2-abrmd:1852): DEBUG:   command_attrs: 0x75b01260
** (tpm2-abrmd:1852): DEBUG: command_source_set_properties: 0x75b02c50
** (tpm2-abrmd:1852): DEBUG: created command source: 0x75b02c50
** (tpm2-abrmd:1852): DEBUG: session_list_new with max-per-connection: 0x4
** (tpm2-abrmd:1852): DEBUG: session_list_init
** (tpm2-abrmd:1852): DEBUG: session_list_set_property: 0x15c5fb0 max-per-connection: 4
** (tpm2-abrmd:1852): DEBUG: resource_manager_set_property: 0x75b02ca0
** (tpm2-abrmd:1852): DEBUG:   in_queue: 0x75b00f90
** (tpm2-abrmd:1852): DEBUG: resource_manager_set_property: 0x75b02ca0
** (tpm2-abrmd:1852): DEBUG:   access_broker: 0x75b0b720
** (tpm2-abrmd:1852): DEBUG: resource_manager_set_property: 0x75b02ca0
** (tpm2-abrmd:1852): DEBUG: created ResourceManager: 0x75b02ca0
** (tpm2-abrmd:1852): DEBUG: response_sink_set_property
** (tpm2-abrmd:1852): DEBUG:   setting PROP_IN_QUEUE
** (tpm2-abrmd:1852): DEBUG: created response source: 0x75b012a8
** (tpm2-abrmd:1852): DEBUG: source_add_sink
** (tpm2-abrmd:1852): DEBUG: command_soruce_add_sink: CommandSource: 0x75b02c50 , Sink: 0x75b02ca0
** (tpm2-abrmd:1852): DEBUG: command_source_set_properties: 0x75b02c50
** (tpm2-abrmd:1852): DEBUG:   sink: 0x75b02ca0
** (tpm2-abrmd:1852): DEBUG: source_add_sink
** (tpm2-abrmd:1852): DEBUG: resource_manager_add_sink: ResourceManager: 0x75b02ca0, Sink: 0x75b012a8
** (tpm2-abrmd:1852): DEBUG: resource_manager_set_property: 0x75b02ca0
** (tpm2-abrmd:1852): DEBUG:   sink: 0x75b012a8
** INFO: init_thread_func done
** (tpm2-abrmd:1852): DEBUG: resource_manager_thread start
** (tpm2-abrmd:1852): DEBUG: response_sink_thread blocking on input queue: 0x75b00e50
** (tpm2-abrmd:1852): DEBUG: message_queue_dequeue 0x75b00e50
** (tpm2-abrmd:1852): DEBUG: message_queue_dequeue 0x75b00f90
======== MISC
pi@raspberrypi:~/TPM/tpm2-tss $ cat /etc/dbus-1/system.d/tpm2-abrmd.conf
<!DOCTYPE busconfig PUBLIC "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
  <!-- ../system.conf have denied everything, so we just punch some holes -->
  <policy user="tss">
    <allow own=""/>
  <policy user="root">
    <allow own=""/>
  <policy context="default">
    <allow send_destination=""/>
    <allow receive_sender=""/>
Gesendet: Montag, 19. März 2018 um 06:07 Uhr
Von: "Philip Tricca" <>
Betreff: Re: [tpm2] Problem with Infineon Iridium SLB 9670 TPM2.0
Hey there madprops,

On Sun, Mar 18, 2018 at 02:04:15PM +0100, wrote:
> <html><head>
> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>
> <div class="signature">
> <div class="signature">
> <div>I'm trying to get an &quot;Infineon Iridium SLB 9670 TPM 2.0 SPI Board&quot; run on my Raspberry Pi 3. I have downloaded, compiled and installed the latest versions of tpm2-abrmd, tpm2-tss and tpm2-tools. I started tpm2-abrmd as root, hoping that I can then interact with the Infineon TPM using tpm2-tools. &quot;tpm2_pcrlist&quot; and all other tpm2_* commands, however, return error &quot;ERROR: Failed to initialize tcti context: 0x1&quot;.</div>

Can you please provide some more info about your configuration?
- the version of the TSS2 libraries you're using
- the version of the tabrmd you're using
- the configuration options you're passing to each

A log file from the tabrmd with logging dialed all the way up would be
helpful. Since tabrmd uses glib and it's logging infrastructure you dial
up the debug output all the way by setting `G_MESSAGES_DEBUG=all` in the
daemon's environment.

> <div>&nbsp;</div>
> <div>Any ideas? Thanks!</div>

The most common issue we've seen people run into when installing from
source is that the default value for the `prefix` and some other
installation directories aren't what most expect.

Still, if you're running the daemon as root you shouldn't have any
issues w/r to permissions on the /dev/tpm0 device node so I wonder if
this node even exists on your platform. You may want to check to see if
`/dev/tpm0` is even present on your system. You're on an ARM platform
which means the kernel will only be aware of the TPM2 device you've
added if you configure the device tree properly.


> <div>pi@raspberrypi:~/TPM/tpm2-abrmd $ uname -a<br>
> Linux raspberrypi 4.4.50-v7&#43; #1 SMP Wed Mar 14 14:01:00 PDT 2018 armv7l GNU/Linux (&lt;== includes patch provided by Infineon)</div>
> <div>&nbsp;</div>
> <div>pi@raspberrypi:~/TPM/tpm2-abrmd $ dmesg | grep tpm<br>
> [&nbsp;&nbsp;&nbsp; 3.700384] tpm_spi_tis spi0.1: 2.0 TPM (device-id 0xB6BC, rev-id 16)</div>
> <div>&nbsp;</div>
> <div>pi@raspberrypi:/etc $ cat /etc/os-release<br>
> PRETTY_NAME=&quot;Raspbian GNU/Linux 9 (stretch)&quot;<br>
> NAME=&quot;Raspbian GNU/Linux&quot;<br>
> VERSION_ID=&quot;9&quot;<br>
> VERSION=&quot;9 (stretch)&quot;<br>
> ID=raspbian<br>
> ID_LIKE=debian<br>
> HOME_URL=&quot;;<br>
> SUPPORT_URL=&quot;;<br>
> BUG_REPORT_URL=&quot;;</div>
> </div>
> </div>
> </div></div></body></html>

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