bluetooth: improving linking for channel sounding

Allowing users to link-out the channel sounding Initiator
role or the Reflector role to improve flash usage.

Signed-off-by: Alexandre Dauphinais <[email protected]>

Author: alda-nordic

subsys/bluetooth/controller/Kconfig

@@ -553,6 +553,33 @@ config BT_CTLR_CHANNEL_SOUNDING_TEST
 	help
 	  Enable Channel Sounding test command support.
 
+choice BT_CTLR_SDC_CS_ROLE
+	prompt "Channel Sounding role support"
+	depends on BT_CTLR_CHANNEL_SOUNDING
+	default BT_CTLR_SDC_CS_ROLE_BOTH
+	help
+	  Select Channel Sounding role support.
+
+config BT_CTLR_SDC_CS_ROLE_BOTH
+	bool "Channel Sounding initiator role and reflector role support"
+	depends on BT_CTLR_CHANNEL_SOUNDING
+	help
+	  Enable Channel Sounding initiator role and reflector role support.
+
+config BT_CTLR_SDC_CS_ROLE_INITIATOR_ONLY
+	bool "Channel Sounding initiator role support only"
+	depends on BT_CTLR_CHANNEL_SOUNDING
+	help
+	  Enable Channel Sounding initiator role support only.
+
+config BT_CTLR_SDC_CS_ROLE_REFLECTOR_ONLY
+	bool "Channel Sounding reflector role support only"
+	depends on BT_CTLR_CHANNEL_SOUNDING
+	help
+	  Enable Channel Sounding reflector role support only.
+
+endchoice
+
 config BT_CTLR_SDC_CS_COUNT
 	int "Number of concurrent connections supporting CS procedures"
 	default 1

subsys/bluetooth/controller/hci_driver.c

@@ -1004,6 +1004,22 @@ static int configure_supported_features(void)
 		}
 	}
 
+	if (IS_ENABLED(CONFIG_BT_CTLR_SDC_CS_ROLE_INITIATOR_ONLY) ||
+		IS_ENABLED(CONFIG_BT_CTLR_SDC_CS_ROLE_BOTH)) {
+		err = sdc_support_channel_sounding_initiator_role();
+		if (err) {
+			return -ENOTSUP;
+		}
+	}
+
+	if (IS_ENABLED(CONFIG_BT_CTLR_SDC_CS_ROLE_REFLECTOR_ONLY) ||
+		IS_ENABLED(CONFIG_BT_CTLR_SDC_CS_ROLE_BOTH)) {
+		err = sdc_support_channel_sounding_reflector_role();
+		if (err) {
+			return -ENOTSUP;
+		}
+	}
+
 	if (IS_ENABLED(CONFIG_BT_CTLR_SDC_LE_POWER_CLASS_1)) {
 		err = sdc_support_le_power_class_1();
 		if (err) {