drivers: dma_wch: add support for the WCH DMA controller

This patch adds an initial driver for the WCH DMA
controller. All hardware features and most interface
features are implemented.

Signed-off-by: Paul Wedeck <[email protected]>

Author: paulwedeck

drivers/dma/CMakeLists.txt

@@ -49,3 +49,4 @@ zephyr_library_sources_ifdef(CONFIG_DMA_NXP_EDMA dma_nxp_edma.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_DW_AXI		dma_dw_axi.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_XILINX_AXI_DMA		dma_xilinx_axi_dma.c)
 zephyr_library_sources_ifdef(CONFIG_DMA_NXP_SDMA dma_nxp_sdma.c)
+zephyr_library_sources_ifdef(CONFIG_DMA_WCH             dma_wch.c)

drivers/dma/Kconfig

@@ -91,4 +91,6 @@ source "drivers/dma/Kconfig.xilinx_axi_dma"
 
 source "drivers/dma/Kconfig.nxp_sdma"
 
+source "drivers/dma/Kconfig.wch"
+
 endif # DMA

drivers/dma/Kconfig.wch

@@ -0,0 +1,9 @@
+# Copyright (c) 2024 Paul Wedeck <[email protected]>
+# SPDX-License-Identifier: Apache-2.0
+
+config DMA_WCH
+	bool "CH32V DMA driver"
+	default y
+	depends on DT_HAS_WCH_WCH_DMA_ENABLED
+	help
+	  DMA driver for the WCH CH32V SoC family.