drivers: i3c: Support I3C driver for STM32.

This commit introduces support for the I3C driver on STM32, enabling
functionality APIs for I3C controllers.

Signed-off-by: Mohammad Badawi <[email protected]>
Signed-off-by: Sara Touqan <[email protected]>

Author: ExaltZephyr

drivers/i3c/CMakeLists.txt

@@ -41,6 +41,11 @@ zephyr_library_sources_ifdef(
   i3c_npcx.c
 )
 
+zephyr_library_sources_ifdef(
+  CONFIG_I3C_STM32
+  i3c_stm32.c
+)
+
 zephyr_library_sources_ifdef(
   CONFIG_I3C_TEST
   i3c_test.c

drivers/i3c/Kconfig

@@ -123,5 +123,6 @@ rsource "Kconfig.nxp"
 rsource "Kconfig.cdns"
 rsource "Kconfig.npcx"
 rsource "Kconfig.test"
+rsource "Kconfig.stm32"
 
 endif # I3C

drivers/i3c/Kconfig.stm32

@@ -0,0 +1,36 @@
+# Copyright (c) 2024 EXALT Technologies.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+module = I3C_STM32
+module-str = i3c_stm32
+
+source "subsys/logging/Kconfig.template.log_config"
+config I3C_STM32
+	bool "STM32 I3C driver support"
+	depends on DT_HAS_ST_STM32_I3C_ENABLED
+	select I3C_IBI_WORKQUEUE if I3C_USE_IBI
+	default y
+	help
+	  Enable support for I3C on STM32 microcontrollers.
+
+if I3C_STM32
+
+config I3C_STM32_DMA
+	bool "STM32 I3C DMA driver support"
+	select DMA
+	help
+	  Enables support for I3C DMA mode on STM32 microcontrollers.
+
+config I3C_STM32_DMA_FIFO_HEAP_SIZE
+	int "Status FIFO and control FIFO heap"
+	depends on I3C_STM32_DMA
+	default 2048
+	help
+	  Configures the heap size for dynamically allocating the regions for
+	  storing status FIFO and control FIFO words which will be used by the DMA.
+	  This value depends on the maximum number of messages that will be sent
+	  during a single transfer. 2KB guarantees enough heap size for sending 256
+	  messages on a single transfer.
+
+endif # I3C_STM32