Bluetooth: audio: tbs_client: Make GTBS client only build option

Refactor Kconfig to add a way to enable GTBS only client.

Signed-off-by: Mariusz Skamra <[email protected]>

Author: MariuszSkamra

samples/bluetooth/hap_ha/prj.conf

@@ -52,6 +52,8 @@ CONFIG_BT_BAS=y
 CONFIG_BT_IAS=y
 
 CONFIG_BT_TBS_CLIENT=y
+CONFIG_BT_TBS_CLIENT_GTBS=y
+CONFIG_BT_TBS_CLIENT_MAX_TBS_INSTANCES=0
 CONFIG_BT_TBS_CLIENT_CCID=y
 CONFIG_BT_TBS_CLIENT_STATUS_FLAGS=y
 

subsys/bluetooth/audio/Kconfig.tbs

@@ -165,6 +165,7 @@ config BT_TBS_CLIENT_MAX_CALLS
 config BT_TBS_CLIENT_MAX_TBS_INSTANCES
 	int "Maximum number of TBS instances to setup"
 	default 1
+	range 0 3 if BT_TBS_CLIENT_GTBS
 	range 1 3
 	help
 	  Sets the maximum number of Telephone Bearer Service (TBS)

tests/bluetooth/shell/testcase.yaml

@@ -228,6 +228,13 @@ tests:
     extra_configs:
       - CONFIG_BT_TBS_CLIENT=n
     tags: bluetooth
+  bluetooth.shell.audio.gtbs_only_client:
+    extra_args: CONF_FILE="audio.conf"
+    build_only: true
+    platform_allow: native_posix
+    extra_configs:
+      - CONFIG_BT_TBS_CLIENT_MAX_TBS_INSTANCES=0
+    tags: bluetooth
   bluetooth.audio_shell.no_cap_acceptor:
     extra_args: CONF_FILE="audio.conf"
     build_only: true