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-* STMicroelectronics STM32 MDMA controller
-
-The STM32 MDMA is a general-purpose direct memory access controller capable of
-supporting 64 independent DMA channels with 256 HW requests.
-
-Required properties:
-- compatible: Should be "st,stm32h7-mdma"
-- reg: Should contain MDMA registers location and length. This should include
-  all of the per-channel registers.
-- interrupts: Should contain the MDMA interrupt.
-- clocks: Should contain the input clock of the DMA instance.
-- resets: Reference to a reset controller asserting the DMA controller.
-- #dma-cells : Must be <5>. See DMA client paragraph for more details.
-
-Optional properties:
-- dma-channels: Number of DMA channels supported by the controller.
-- dma-requests: Number of DMA request signals supported by the controller.
-- st,ahb-addr-masks: Array of u32 mask to list memory devices addressed via
-  AHB bus.
-
-Example:
-
-	mdma1: dma@52000000 {
-		compatible = "st,stm32h7-mdma";
-		reg = <0x52000000 0x1000>;
-		interrupts = <122>;
-		clocks = <&timer_clk>;
-		resets = <&rcc 992>;
-		#dma-cells = <5>;
-		dma-channels = <16>;
-		dma-requests = <32>;
-		st,ahb-addr-masks = <0x20000000>, <0x00000000>;
-	};
-
-* DMA client
-
-DMA clients connected to the STM32 MDMA controller must use the format
-described in the dma.txt file, using a five-cell specifier for each channel:
-a phandle to the MDMA controller plus the following five integer cells:
-
-1. The request line number
-2. The priority level
-	0x00: Low
-	0x01: Medium
-	0x10: High
-	0x11: Very high
-3. A 32bit mask specifying the DMA channel configuration
- -bit 0-1: Source increment mode
-	0x00: Source address pointer is fixed
-	0x10: Source address pointer is incremented after each data transfer
-	0x11: Source address pointer is decremented after each data transfer
- -bit 2-3: Destination increment mode
-	0x00: Destination address pointer is fixed
-	0x10: Destination address pointer is incremented after each data
-	transfer
-	0x11: Destination address pointer is decremented after each data
-	transfer
- -bit 8-9: Source increment offset size
-	0x00: byte (8bit)
-	0x01: half-word (16bit)
-	0x10: word (32bit)
-	0x11: double-word (64bit)
- -bit 10-11: Destination increment offset size
-	0x00: byte (8bit)
-	0x01: half-word (16bit)
-	0x10: word (32bit)
-	0x11: double-word (64bit)
--bit 25-18: The number of bytes to be transferred in a single transfer
-	(min = 1 byte, max = 128 bytes)
--bit 29:28: Trigger Mode
-	0x00: Each MDMA request triggers a buffer transfer (max 128 bytes)
-	0x01: Each MDMA request triggers a block transfer (max 64K bytes)
-	0x10: Each MDMA request triggers a repeated block transfer
-	0x11: Each MDMA request triggers a linked list transfer
-4. A 32bit value specifying the register to be used to acknowledge the request
-   if no HW ack signal is used by the MDMA client
-5. A 32bit mask specifying the value to be written to acknowledge the request
-   if no HW ack signal is used by the MDMA client
-
-Example:
-
-	i2c4: i2c@5c002000 {
-		compatible = "st,stm32f7-i2c";
-		reg = <0x5c002000 0x400>;
-		interrupts = <95>,
-			     <96>;
-		clocks = <&timer_clk>;
-		#address-cells = <1>;
-		#size-cells = <0>;
-		dmas = <&mdma1 36 0x0 0x40008 0x0 0x0>,
-		       <&mdma1 37 0x0 0x40002 0x0 0x0>;
-		dma-names = "rx", "tx";
-		status = "disabled";
-	};