hal: realtek: add ADC/CAN libraries

bee/drivers/CMakeLists.txt

@@ -33,6 +33,66 @@ function(add_soc_series_subdir ic_name)
     endif()
 endfunction()
 
+# Add either a blob library or a stub source for a driver.
+#
+# Behavior:
+#   - If CONFIG_BUILD_ONLY_NO_BLOBS=y, always use the stub source.
+#   - Otherwise, use the blob library when present.
+#   - If the blob library is absent, fall back to the stub source.
+#   - If the same blob library is requested multiple times, link it only once.
+#
+# Usage:
+#   add_blob_or_stub(
+#       ${ZEPHYR_CURRENT_LIBRARY}
+#       adc
+#       <blob library path>
+#       <stub source path>
+#   )
+function(add_blob_or_stub TARGET NAME BLOB_LIB_PATH STUB_FILE)
+    string(TOUPPER "${NAME}" NAME_UPPER)
+
+    set(use_stubs FALSE)
+
+    if(CONFIG_BUILD_ONLY_NO_BLOBS)
+        message(STATUS "CONFIG_BUILD_ONLY_NO_BLOBS=y, forcing ${NAME_UPPER} stubs")
+        set(use_stubs TRUE)
+    elseif(EXISTS "${BLOB_LIB_PATH}")
+        get_property(linked_blobs GLOBAL PROPERTY REALTEK_BLOB_LIBS_LINKED)
+        if(NOT linked_blobs)
+            set(linked_blobs "")
+        endif()
+
+        list(FIND linked_blobs "${BLOB_LIB_PATH}" blob_index)
+        if(blob_index EQUAL -1)
+            message(STATUS "Using ${NAME_UPPER} blob library: ${BLOB_LIB_PATH}")
+            target_link_libraries(${TARGET} PUBLIC ${BLOB_LIB_PATH})
+            set_property(GLOBAL APPEND PROPERTY REALTEK_BLOB_LIBS_LINKED "${BLOB_LIB_PATH}")
+        else()
+            message(STATUS
+                "${NAME_UPPER} blob library already linked, skipping duplicate: "
+                "${BLOB_LIB_PATH}"
+            )
+        endif()
+    else()
+        message(STATUS
+            "${NAME_UPPER} blob library not found: ${BLOB_LIB_PATH}\n"
+            "Falling back to ${NAME_UPPER} stubs"
+        )
+        set(use_stubs TRUE)
+    endif()
+
+    if(use_stubs)
+        if(EXISTS "${STUB_FILE}")
+            message(STATUS "Using ${NAME_UPPER} stub source: ${STUB_FILE}")
+            zephyr_library_sources(${STUB_FILE})
+        else()
+            message(FATAL_ERROR
+                "${NAME_UPPER} stub source not found: ${STUB_FILE}"
+            )
+        endif()
+    endif()
+endfunction()
+
 add_subdirectory(adc)
 add_subdirectory_ifdef(CONFIG_REALTEK_BEE_BT bluetooth)
 add_subdirectory(can)

bee/drivers/adc/src/device/rtl8752h/CMakeLists.txt

@@ -0,0 +1,19 @@
+# Copyright (c) 2026, Realtek Semiconductor Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+file(GLOB ADC_SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/*.c")
+zephyr_library_sources(${ADC_SOURCES})
+zephyr_include_directories(.)
+
+set(STUB_DIR ${ZEPHYR_HAL_REALTEK_MODULE_DIR}/bee/drivers/stubs)
+set(ADC_STUB_FILE ${STUB_DIR}/rtl8752h/adc_stubs.c)
+set(ADC_LIB_PATH
+    ${ZEPHYR_HAL_REALTEK_MODULE_DIR}/zephyr/blobs/bee/drivers/rtl8752h/adc/librtl8752h_adc.a
+)
+
+add_blob_or_stub(
+    ${ZEPHYR_CURRENT_LIBRARY}
+    adc
+    "${ADC_LIB_PATH}"
+    "${ADC_STUB_FILE}"
+)

bee/drivers/adc/src/device/rtl87x2g/CMakeLists.txt

@@ -0,0 +1,19 @@
+# Copyright (c) 2026, Realtek Semiconductor Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+file(GLOB ADC_SOURCES "${CMAKE_CURRENT_SOURCE_DIR}/*.c")
+zephyr_library_sources(${ADC_SOURCES})
+zephyr_include_directories(.)
+
+set(STUB_DIR ${ZEPHYR_HAL_REALTEK_MODULE_DIR}/bee/drivers/stubs)
+set(ADC_STUB_FILE ${STUB_DIR}/rtl87x2g/adc_stubs.c)
+set(ADC_LIB_PATH
+  ${ZEPHYR_HAL_REALTEK_MODULE_DIR}/zephyr/blobs/bee/drivers/rtl87x2g/adc/librtl87x2g_adc.a
+)
+
+add_blob_or_stub(
+    ${ZEPHYR_CURRENT_LIBRARY}
+    adc
+    "${ADC_LIB_PATH}"
+    "${ADC_STUB_FILE}"
+)

bee/drivers/can/src/device/rtl87x2g/CMakeLists.txt

@@ -0,0 +1,17 @@
+# Copyright (c) 2026, Realtek Semiconductor Corporation
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_include_directories(.)
+
+set(STUB_DIR ${ZEPHYR_HAL_REALTEK_MODULE_DIR}/bee/drivers/stubs)
+set(CAN_STUB_FILE ${STUB_DIR}/rtl87x2g/can_stubs.c)
+set(CAN_LIB_PATH
+    ${ZEPHYR_HAL_REALTEK_MODULE_DIR}/zephyr/blobs/bee/drivers/rtl87x2g/can/librtl87x2g_can.a
+)
+
+add_blob_or_stub(
+    ${ZEPHYR_CURRENT_LIBRARY}
+    can
+    "${CAN_LIB_PATH}"
+    "${CAN_STUB_FILE}"
+)

bee/drivers/stubs/rtl8752h/adc_stubs.c

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2026, Realtek Semiconductor Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @file adc_stubs.c
+ * @brief Stub implementations for ADC library functions.
+ *        Used when building without binary blobs (CONFIG_BUILD_ONLY_NO_BLOBS).
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <adc_lib.h>
+
+/* Stub implementations for ADC functions */
+bool ADC_CalibrationInit(void)
+{
+	return true;
+}
+
+float ADC_GetVoltage(const ADC_SampleMode vSampleMode, int32_t vSampleData,
+		     ADC_ErrorStatus *pErrorStatus)
+{
+	(void)vSampleMode;
+	(void)vSampleData;
+	(void)pErrorStatus;
+	return 0.0f;
+}
+
+uint16_t ADC_GetResistance(void)
+{
+	return 0;
+}

bee/drivers/stubs/rtl87x2g/adc_stubs.c

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2026, Realtek Semiconductor Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/**
+ * @file adc_stubs.c
+ * @brief Stub implementations for ADC library functions.
+ *        Used when building without binary blobs (CONFIG_BUILD_ONLY_NO_BLOBS).
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <adc_lib.h>
+
+/* Stub implementations for ADC functions */
+bool ADC_CalibrationInit(void)
+{
+	return true;
+}
+
+float ADC_GetVoltage(const ADC_SampleMode vSampleMode, int32_t vSampleData,
+		     ADC_ErrorStatus *pErrorStatus)
+{
+	(void)vSampleMode;
+	(void)vSampleData;
+	(void)pErrorStatus;
+	return 0.0f;
+}
+
+uint16_t ADC_GetResistance(void)
+{
+	return 0;
+}