diff --git a/dts/bindings/dma/st,stm32-dma.yaml b/dts/bindings/dma/st,stm32-dma.yaml
index b014fb1baa0..7fd8d84b09b 100644
--- a/dts/bindings/dma/st,stm32-dma.yaml
+++ b/dts/bindings/dma/st,stm32-dma.yaml
@@ -24,6 +24,11 @@ properties:
 # Parameter syntax of stm32 follows the dma client dts syntax
 # in the Linux kernel declared in
 # https://git.kernel.org/pub/scm/linux/kernel/git/devicetree/devicetree-rebasing.git/plain/Bindings/dma/stm32-dma.txt
+#
+# channel: DMA channel
+# slot: DMA stream of the DMA channel for DMA V1 or for DMA V2 with MUX peripheral request else NA
+# channel-config: configuration of the selected DMA channel
+# features: fifo threshold if relevant for DMA V1 or TBD for DMA V2
 
 dma-cells:
   - channel
diff --git a/include/dt-bindings/dma/stm32_dma.h b/include/dt-bindings/dma/stm32_dma.h
index 623012a021a..5d8d90b99db 100644
--- a/include/dt-bindings/dma/stm32_dma.h
+++ b/include/dt-bindings/dma/stm32_dma.h
@@ -4,8 +4,11 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 /* macros for channel-config */
+#define STM32_DMA_CONFIG_DIRECTION(config)		(config & 0x3 << 6)
 #define STM32_DMA_CONFIG_PERIPH_ADDR_INC(config)	(config & 0x1 << 9)
 #define STM32_DMA_CONFIG_MEM_ADDR_INC(config)		(config & 0x1 << 10)
+#define STM32_DMA_CONFIG_PERIPH_DATA_SIZE(config)	(config & (0x3 << 11))
+#define STM32_DMA_CONFIG_MEM_DATA_SIZE(config)		(config & (0x3 << 13))
 #define STM32_DMA_CONFIG_PERIPH_INC_FIXED(config)	(config & 0x1 << 15)
 #define STM32_DMA_CONFIG_PRIORITY(config)		((config >> 16) & 0x3)