drivers: dma: Add initial support for silabs LDMA

Initial support of silabs LDMA using hal library em_ldma.

Signed-off-by: Martin Hoff <[email protected]>

drivers/dma/CMakeLists.txt

@@ -39,6 +39,7 @@ zephyr_library_sources_ifdef(CONFIG_DMA_MCUX_SMARTDMA	dma_mcux_smartdma.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_ANDES_ATCDMAC300	dma_andes_atcdmac300.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_SEDI		dma_sedi.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_SI32		dma_si32.c)
+zephyr_library_sources_ifdef(CONFIG_DMA_SILABS_LDMA		dma_silabs_ldma.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_SMARTBOND   dma_smartbond.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_NXP_SOF_HOST_DMA dma_nxp_sof_host_dma.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_EMUL	    dma_emul.c)

drivers/dma/Kconfig

@@ -72,6 +72,8 @@ source "drivers/dma/Kconfig.sedi"
 
 source "drivers/dma/Kconfig.si32"
 
+source "drivers/dma/Kconfig.silabs"
+
 source "drivers/dma/Kconfig.smartbond"
 
 source "drivers/dma/Kconfig.nxp_sof_host_dma"

drivers/dma/Kconfig.silabs

@@ -0,0 +1,21 @@
+# Copyright (c) 2024 Silicon-labs
+# SPDX-License-Identifier: Apache-2.0
+
+config DMA_SILABS_LDMA
+	bool "Silabs DMA driver"
+	default y
+	select SYS_MEM_BLOCKS
+	select SOC_GECKO_LDMA
+	depends on DT_HAS_SILABS_LDMA_ENABLED
+	help
+	  Driver for Silabs DMA.
+
+if DMA_SILABS_LDMA
+
+config DMA_MAX_DESCRIPTOR
+	int "Max Number of block_config (LDMA_Descriptor)"
+	default 8
+	help
+	  Max Number of block_config (LDMA_Descriptor)
+
+endif