drivers: dma: new dma peripheral driver for stm32u5

It includes the definition for the DMA peripheral of this type,
present on stm32U5 devices.
A particular DMA_STM32U5 config is selected for that purpose.
The driver is derived from the existing dma_stm32.c
The GPDMA is counting channels (0-15) ; stream offset is 0.

Signed-off-by: Francois Ramu <[email protected]>

Author: FRASTM

drivers/dma/CMakeLists.txt

@@ -3,6 +3,7 @@
 zephyr_library()
 
 zephyr_library_sources_ifdef(CONFIG_DMA_SAM_XDMAC	dma_sam_xdmac.c)
+zephyr_library_sources_ifdef(CONFIG_DMA_STM32U5	dma_stm32u5.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_STM32		dma_stm32.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_STM32_V1	dma_stm32_v1.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_STM32_V2	dma_stm32_v2.c)

drivers/dma/Kconfig.stm32

@@ -8,13 +8,24 @@ DT_COMPAT_ST_STM32_DMA_V1 := st,stm32-dma-v1
 DT_COMPAT_ST_STM32_DMA_V2 := st,stm32-dma-v2
 DT_COMPAT_ST_STM32_DMA_V2BIS := st,stm32-dma-v2bis
 DT_COMPAT_ST_STM32_DMAMUX := st,stm32-dmamux
+DT_COMPAT_ST_STM32U5_DMA := st,stm32u5-dma
 
 config DMA_STM32
 	bool "STM32 DMA driver"
 	select USE_STM32_LL_DMA
 	depends on SOC_FAMILY_STM32
+	default y if !$(dt_compat_enabled,$(DT_COMPAT_ST_STM32U5_DMA))
 	help
-	  DMA driver for STM32 series SoCs.
+	  Driver for STM32 DMA V1, V2 and V2bis types.
+
+config DMA_STM32U5
+	bool "STM32U5 serie DMA driver"
+	select USE_STM32_LL_DMA
+	depends on SOC_FAMILY_STM32
+	default y if $(dt_compat_enabled,$(DT_COMPAT_ST_STM32U5_DMA))
+	help
+	  Enable DMA support mainly for stm32U5 family.
+	  It differs from the DMA driver due to the GPDMA peripheral.
 
 if DMA_STM32