ble: esp32c2: Add support

boards/espressif/esp8684_devkitm/esp8684_devkitm.dts

@@ -65,3 +65,7 @@
 &wifi {
 	status = "okay";
 };
+
+&esp32_bt_hci {
+	status = "okay";
+};

drivers/bluetooth/hci/Kconfig

@@ -212,11 +212,11 @@ config BT_ESP32
 	select BT_CTLR_PRIVACY_SUPPORT
 	select BT_CTLR_EXT_SCAN_FP_SUPPORT
 	select BT_CTLR_DATA_LEN_UPDATE_SUPPORT
-	select BT_CTLR_ADV_EXT_SUPPORT if SOC_SERIES_ESP32S3 || SOC_SERIES_ESP32C3 || SOC_SERIES_ESP32C6
-	select BT_CTLR_PHY_UPDATE_SUPPORT if SOC_SERIES_ESP32S3 || SOC_SERIES_ESP32C3 || SOC_SERIES_ESP32C6
-	select BT_CTLR_EXT_REJ_IND_SUPPORT if SOC_SERIES_ESP32S3 || SOC_SERIES_ESP32C3 || SOC_SERIES_ESP32C6
-	select BT_CTLR_PHY_2M_SUPPORT if SOC_SERIES_ESP32S3 || SOC_SERIES_ESP32C3 || SOC_SERIES_ESP32C6
-	select BT_CTLR_CHAN_SEL_2_SUPPORT if SOC_SERIES_ESP32S3 || SOC_SERIES_ESP32C3 || SOC_SERIES_ESP32C6
+	select BT_CTLR_ADV_EXT_SUPPORT if SOC_SERIES_ESP32S3 || SOC_SERIES_ESP32C2 || SOC_SERIES_ESP32C3 || SOC_SERIES_ESP32C6
+	select BT_CTLR_PHY_UPDATE_SUPPORT if SOC_SERIES_ESP32S3 || SOC_SERIES_ESP32C2 || SOC_SERIES_ESP32C3 || SOC_SERIES_ESP32C6
+	select BT_CTLR_EXT_REJ_IND_SUPPORT if SOC_SERIES_ESP32S3 || SOC_SERIES_ESP32C2 || SOC_SERIES_ESP32C3 || SOC_SERIES_ESP32C6
+	select BT_CTLR_PHY_2M_SUPPORT if SOC_SERIES_ESP32S3 || SOC_SERIES_ESP32C2 || SOC_SERIES_ESP32C3 || SOC_SERIES_ESP32C6
+	select BT_CTLR_CHAN_SEL_2_SUPPORT if SOC_SERIES_ESP32S3 || SOC_SERIES_ESP32C2 || SOC_SERIES_ESP32C3 || SOC_SERIES_ESP32C6
 	help
 	  Espressif HCI bluetooth interface
 

drivers/bluetooth/hci/Kconfig.esp32

@@ -1,10 +1,10 @@
-# Copyright 2024 Espressif Systems (Shanghai) PTE LTD
+# Copyright 2024-2025 Espressif Systems (Shanghai) PTE LTD
 
 if BT_ESP32
 
 config HEAP_MEM_POOL_ADD_SIZE_ESP_BT
 	int
-	default 50000 if SOC_SERIES_ESP32C6
+	default 50000 if SOC_SERIES_ESP32C2 || SOC_SERIES_ESP32C6
 	default 25600
 	default 0
 	help
@@ -269,7 +269,7 @@ config ESP32_BT_CTLR_COEX_PHY_CODED_TX_RX_TLIM_EFF
 
 endmenu # ESP32 Bluetooth Controller Configuration
 
-if SOC_SERIES_ESP32C6
+if SOC_SERIES_ESP32C2 || SOC_SERIES_ESP32C6
 
 menu "Espressif HCI Config"
 
@@ -348,7 +348,8 @@ endif
 config ESP32_BT_LE_MAX_PERIODIC_SYNCS
 	int "Maximum periodic advertising syncs"
 	depends on ESP32_BT_LE_50_FEATURE_SUPPORT
-	range 0 8
+	range 0 3 if SOC_SERIES_ESP32C2
+	range 0 8 if SOC_SERIES_ESP32C6
 	default 1 if ESP32_BT_LE_ENABLE_PERIODIC_ADV
 	default 0
 	help
@@ -364,6 +365,7 @@ config ESP32_BT_LE_MAX_PERIODIC_ADVERTISER_LIST
 
 config ESP32_BT_LE_POWER_CONTROL_ENABLED
 	bool "Controller BLE power control"
+	depends on SOC_SERIES_ESP32C6
 	depends on ESP32_BT_LE_50_FEATURE_SUPPORT
 	help
 	  Allow controller to adjust transmit power based on link quality.
@@ -533,8 +535,10 @@ config ESP32_BT_LE_LL_PEER_SCA
 
 config ESP32_BT_LE_MAX_CONNECTIONS
 	int "Max concurrent connections"
-	range 1 70
-	default 3
+	range 1 2 if SOC_SERIES_ESP32C2
+	range 1 70 if SOC_SERIES_ESP32C6
+	default 2 if SOC_SERIES_ESP32C2
+	default 3 if SOC_SERIES_ESP32C6
 	help
 	  Maximum number of BLE connections. Each uses ~1 KB of DRAM.
 
@@ -586,6 +590,8 @@ config ESP32_BT_LE_USE_ESP_TIMER
 	help
 	  Use high-priority esp-timer for controller callouts.
 
+if SOC_SERIES_ESP32C6
+
 config ESP32_BT_LE_SCAN_DUPL
 	bool "BLE scan duplicate filtering"
 	default y
@@ -638,6 +644,8 @@ config ESP32_BT_LE_MSYS_INIT_IN_CONTROLLER
 	help
 	  Allocate MSYS mbufs within the controller instead of the host.
 
+endif # SOC_SERIES_ESP32C6
+
 config ESP32_BT_LE_TX_CCA_ENABLED
 	bool "TX CCA feature"
 	help
@@ -684,6 +692,10 @@ config BT_CTLR_SCAN_BACKOFF_UPPERLIMITMAX
 	help
 	  Upperlimitmax value (power of 2) for scan backoff procedure.
 
+endif # SOC_SERIES_ESP32C2 || SOC_SERIES_ESP32C6
+
+if SOC_SERIES_ESP32C6
+
 config ESP32_BT_LE_CTLR_CHAN_ASS_EN
 	bool "Channel assessment (experimental)"
 	help

dts/riscv/espressif/esp32c2/esp32c2_common.dtsi

@@ -23,6 +23,7 @@
 	chosen {
 		zephyr,entropy = &trng0;
 		zephyr,flash-controller = &flash;
+		zephyr,bt-hci = &esp32_bt_hci;
 	};
 
 	cpus {
@@ -50,6 +51,11 @@
 		status = "disabled";
 	};
 
+	esp32_bt_hci: esp32_bt_hci {
+		compatible = "espressif,esp32-bt-hci";
+		status = "disabled";
+	};
+
 	clock: clock {
 		compatible = "espressif,esp32-clock";
 		fast-clk-src = <ESP32_RTC_FAST_CLK_SRC_RC_FAST>;

samples/bluetooth/central/sample.yaml

@@ -15,6 +15,7 @@ tests:
     platform_allow:
       - esp32_devkitc/esp32/procpu
       - esp32s3_devkitm/esp32s3/procpu
+      - esp8684_devkitm
       - esp32c3_devkitm
       - esp32c6_devkitc/esp32c6/hpcore
       - sltb010a/efr32bg22c224f512im40

samples/bluetooth/peripheral/sample.yaml

@@ -25,6 +25,7 @@ tests:
     platform_allow:
       - esp32_devkitc/esp32/procpu
       - esp32s3_devkitm/esp32s3/procpu
+      - esp8684_devkitm
       - esp32c3_devkitm
       - esp32c6_devkitc/esp32c6/hpcore
       - sltb010a/efr32bg22c224f512im40

soc/espressif/esp32c2/default.ld

@@ -328,6 +328,8 @@ SECTIONS
     *libpp.a:( .wifirxiram  .wifirxiram.* .wifislprxiram .wifislprxiram.*)
 #endif /* CONFIG_ESP32_WIFI_RX_IRAM_OPT */
 
+    *libble_app.a:(.isr_iram1.* .conn_iram1.* .sleep_iram1.*)
+
     . = ALIGN(4) + 16;
 
   } GROUP_DATA_LINK_IN(IRAM_REGION, ROMABLE_REGION)
@@ -592,6 +594,18 @@ SECTIONS
     __bss_start = ABSOLUTE(.);
     _bss_start = ABSOLUTE(.);
 
+    . = ALIGN (4);
+    _bt_bss_start = ABSOLUTE(.);
+    *libbtbb.a:(.bss .bss.* COMMON)
+    . = ALIGN (4);
+    _bt_bss_end = ABSOLUTE(.);
+
+    . = ALIGN (4);
+    _bt_controller_bss_start = ABSOLUTE(.);
+    *libble_app.a:(.bss .bss.* COMMON)
+    . = ALIGN (4);
+    _bt_controller_bss_end = ABSOLUTE(.);
+
     *(.dynsbss)
     *(.sbss)
     *(.sbss.*)

west.yml

@@ -169,7 +169,7 @@ manifest:
       groups:
         - hal
     - name: hal_espressif
-      revision: f3453bdeced28642424692aae32cce4eec3f2d7f
+      revision: 114bdcb05136403d84e3529809c3e8044153a86c
       path: modules/hal/espressif
       west-commands: west/west-commands.yml
       groups: