esp32: add ESP-IDF bootloader option

add ESP-IDF bootloader support

Signed-off-by: Gautier Seidel <[email protected]>

boards/xtensa/esp32/CMakeLists.txt

@@ -0,0 +1,11 @@
+
+if(CONFIG_BOOTLOADER_ESP_IDF)
+  add_custom_target(EspIdfBootloader
+	COMMAND PATH=$ENV{PATH}:${ESPRESSIF_TOOLCHAIN_PATH}/bin make IDF_PATH=${ESP_IDF_PATH} -C ${ESP_IDF_PATH}/examples/get-started/hello_world/ BUILD_DIR_BASE=${CMAKE_BINARY_DIR}/esp-idf defconfig
+	COMMAND PATH=$ENV{PATH}:${ESPRESSIF_TOOLCHAIN_PATH}/bin make IDF_PATH=${ESP_IDF_PATH} -C ${ESP_IDF_PATH}/examples/get-started/hello_world/ BUILD_DIR_BASE=${CMAKE_BINARY_DIR}/esp-idf bootloader
+	COMMAND PATH=$ENV{PATH}:${ESPRESSIF_TOOLCHAIN_PATH}/bin make IDF_PATH=${ESP_IDF_PATH} -C ${ESP_IDF_PATH}/examples/get-started/hello_world/ BUILD_DIR_BASE=${CMAKE_BINARY_DIR}/esp-idf partition_table
+	)
+
+  add_dependencies(app EspIdfBootloader)
+
+endif()

misc/Kconfig

@@ -338,6 +338,16 @@ config BOOTLOADER_MCUBOOT
 	    * Including dts/common/mcuboot.overlay when building the Device
 	      Tree in order to place and link the image at the slot0 offset
 
+config BOOTLOADER_ESP_IDF
+	bool
+	prompt "ESP-IDF bootloader support"
+	default n
+	help
+	  This option will trigger the compilation of the ESP-IDF booloader
+	  inside the build folder.
+	  At flash time, the bootloader will be flashed with the zephyr image
+	depends on SOC_ESP32
+
 config BOOTLOADER_KEXEC
 	bool
 	prompt "Boot using Linux kexec() system call"