drivers/bluetooth/hci: Implement HCI driver for stm32wb

Implement HCI driver for STM32WB. It allows host to controller.
It is based on ST library allowing communication over RAM shared
bewteen chip's C-M4 and C-M0 cores.

Signed-off-by: Erwan Gouriou <[email protected]>

Author: erwango

drivers/bluetooth/hci/CMakeLists.txt

@@ -3,4 +3,5 @@
 zephyr_sources_ifdef(CONFIG_BT_H4       h4.c)
 zephyr_sources_ifdef(CONFIG_BT_H5       h5.c)
 zephyr_sources_ifdef(CONFIG_BT_SPI      spi.c)
+zephyr_sources_ifdef(CONFIG_BT_STM32_IPM      ipm_stm32wb.c)
 zephyr_sources_ifdef(CONFIG_BT_USERCHAN userchan.c)

drivers/bluetooth/hci/Kconfig

@@ -44,6 +44,13 @@ config BT_SPI
 	  additional platform specific knowledge may need to be added as
 	  devices are.
 
+config BT_STM32_IPM
+	bool "IPM HCI"
+	select USE_STM32_HAL_CORTEX
+	select HAS_STLIB
+	help
+	  TODO
+
 config BT_USERCHAN
 	bool "HCI User Channel based driver"
 	depends on BOARD_NATIVE_POSIX