Merge tag 'dmaengine-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine

Pull dmaengine updates from Vinod Koul:
 "New support / Core:

   - Remove DMA_MEMCPY_SG for lack of users

   - Tegra 234 dmaengine support

   - Mediatek MT8365 dma support

   - Apple ADMAC driver

  Updates:

   - Yaml conversion for ST-Ericsson DMA40 binding and Freescale edma

   - rz-dmac updates and device_synchronize support

   - Bunch of typo in comments fixes in drivers

   - multithread support in sf-pdma driver"

* tag 'dmaengine-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (50 commits)
  dmaengine: mediatek: mtk-hsdma: Fix typo 'the the' in comment
  dmaengine: axi-dmac: check cache coherency register
  dmaengine: sh: rz-dmac: Add device_synchronize callback
  dmaengine: sprd: Cleanup in .remove() after pm_runtime_get_sync() failed
  dmaengine: tegra: Add terminate() for Tegra234
  dt-bindings: dmaengine: Add compatible for Tegra234
  dmaengine: xilinx: use strscpy to replace strlcpy
  dmaengine: imx-sdma: Add FIFO stride support for multi FIFO script
  dmaengine: idxd: Correct IAX operation code names
  dmaengine: imx-dma: Cast of_device_get_match_data() with (uintptr_t)
  dmaengine: dw-axi-dmac: ignore interrupt if no descriptor
  dmaengine: dw-axi-dmac: do not print NULL LLI during error
  dmaengine: altera-msgdma: Fixed some inconsistent function name descriptions
  dmaengine: imx-sdma: Add missing struct documentation
  dmaengine: sf-pdma: Add multithread support for a DMA channel
  dt-bindings: dma: dw-axi-dmac: extend the number of interrupts
  dmaengine: dmatest: use strscpy to replace strlcpy
  dmaengine: ste_dma40: fix typo in comment
  dmaengine: jz4780: fix typo in comment
  dmaengine: s3c24xx: fix typo in comment
  ...

8 files changed, 404 insertions, 251 deletions

diff --git a/Documentation/devicetree/bindings/dma/apple,admac.yaml b/Documentation/devicetree/bindings/dma/apple,admac.yaml
new file mode 100644
index 000000000000..bdc8c129c4f5
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/apple,admac.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/apple,admac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple Audio DMA Controller (ADMAC)
+
+description: |
+  Apple's Audio DMA Controller (ADMAC) is used to fetch and store audio samples
+  on SoCs from the "Apple Silicon" family.
+
+  The controller has been seen with up to 24 channels. Even-numbered channels
+  are TX-only, odd-numbered are RX-only. Individual channels are coupled to
+  fixed device endpoints.
+
+maintainers:
+  - Martin Povišer <povik+lin@cutebit.org>
+
+allOf:
+  - $ref: "dma-controller.yaml#"
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - apple,t6000-admac
+          - apple,t8103-admac
+      - const: apple,admac
+
+  reg:
+    maxItems: 1
+
+  '#dma-cells':
+    const: 1
+    description:
+      Clients specify a single cell with channel number.
+
+  dma-channels:
+    maximum: 24
+
+  interrupts:
+    minItems: 4
+    maxItems: 4
+    description:
+      Interrupts that correspond to the 4 IRQ outputs of the controller. Usually
+      only one of the controller outputs will be connected as an usable interrupt
+      source. The remaining interrupts will be left without a valid value, e.g.
+      in an interrupts-extended list the disconnected positions will contain
+      an empty phandle reference <0>.
+
+required:
+  - compatible
+  - reg
+  - '#dma-cells'
+  - dma-channels
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/apple-aic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    aic: interrupt-controller {
+      interrupt-controller;
+      #interrupt-cells = <3>;
+    };
+
+    admac: dma-controller@238200000 {
+      compatible = "apple,t8103-admac", "apple,admac";
+      reg = <0x38200000 0x34000>;
+      dma-channels = <24>;
+      interrupts-extended = <0>,
+                            <&aic AIC_IRQ 626 IRQ_TYPE_LEVEL_HIGH>,
+                            <0>,
+                            <0>;
+      #dma-cells = <1>;
+    };
diff --git a/Documentation/devicetree/bindings/dma/fsl,edma.yaml b/Documentation/devicetree/bindings/dma/fsl,edma.yaml
new file mode 100644
index 000000000000..050e6cd57727
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/fsl,edma.yaml
@@ -0,0 +1,155 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/fsl,edma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale enhanced Direct Memory Access(eDMA) Controller
+
+description: |
+  The eDMA channels have multiplex capability by programmable
+  memory-mapped registers. channels are split into two groups, called
+  DMAMUX0 and DMAMUX1, specific DMA request source can only be multiplexed
+  by any channel of certain group, DMAMUX0 or DMAMUX1, but not both.
+
+maintainers:
+  - Peng Fan <peng.fan@nxp.com>
+
+properties:
+  compatible:
+    oneOf:
+      - enum:
+          - fsl,vf610-edma
+          - fsl,imx7ulp-edma
+      - items:
+          - const: fsl,ls1028a-edma
+          - const: fsl,vf610-edma
+
+  reg:
+    minItems: 2
+    maxItems: 3
+
+  interrupts:
+    minItems: 2
+    maxItems: 17
+
+  interrupt-names:
+    minItems: 2
+    maxItems: 17
+
+  "#dma-cells":
+    const: 2
+
+  dma-channels:
+    const: 32
+
+  clocks:
+    maxItems: 2
+
+  clock-names:
+    maxItems: 2
+
+  big-endian:
+    description: |
+      If present registers and hardware scatter/gather descriptors of the
+      eDMA are implemented in big endian mode, otherwise in little mode.
+    type: boolean
+
+required:
+  - "#dma-cells"
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - dma-channels
+
+allOf:
+  - $ref: "dma-controller.yaml#"
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,vf610-edma
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: dmamux0
+            - const: dmamux1
+        interrupts:
+          maxItems: 2
+        interrupt-names:
+          items:
+            - const: edma-tx
+            - const: edma-err
+        reg:
+          maxItems: 3
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: fsl,imx7ulp-edma
+    then:
+      properties:
+        clock-names:
+          items:
+            - const: dma
+            - const: dmamux0
+        interrupts:
+          maxItems: 17
+        reg:
+          maxItems: 2
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/vf610-clock.h>
+
+    edma0: dma-controller@40018000 {
+      #dma-cells = <2>;
+      compatible = "fsl,vf610-edma";
+      reg = <0x40018000 0x2000>,
+            <0x40024000 0x1000>,
+            <0x40025000 0x1000>;
+      interrupts = <0 8 IRQ_TYPE_LEVEL_HIGH>,
+                   <0 9 IRQ_TYPE_LEVEL_HIGH>;
+      interrupt-names = "edma-tx", "edma-err";
+      dma-channels = <32>;
+      clock-names = "dmamux0", "dmamux1";
+      clocks = <&clks VF610_CLK_DMAMUX0>, <&clks VF610_CLK_DMAMUX1>;
+    };
+
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/imx7ulp-clock.h>
+
+    edma1: dma-controller@40080000 {
+      #dma-cells = <2>;
+      compatible = "fsl,imx7ulp-edma";
+      reg = <0x40080000 0x2000>,
+            <0x40210000 0x1000>;
+      dma-channels = <32>;
+      interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>,
+                   <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>,
+                   /* last is eDMA2-ERR interrupt */
+                   <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
+       clock-names = "dma", "dmamux0";
+       clocks = <&pcc2 IMX7ULP_CLK_DMA1>, <&pcc2 IMX7ULP_CLK_DMA_MUX1>;
+    };
diff --git a/Documentation/devicetree/bindings/dma/fsl-edma.txt b/Documentation/devicetree/bindings/dma/fsl-edma.txt
deleted file mode 100644
index ee1754739b4b..000000000000
--- a/Documentation/devicetree/bindings/dma/fsl-edma.txt
+++ /dev/null
@@ -1,111 +0,0 @@
-* Freescale enhanced Direct Memory Access(eDMA) Controller
-
-  The eDMA channels have multiplex capability by programmble memory-mapped
-registers. channels are split into two groups, called DMAMUX0 and DMAMUX1,
-specific DMA request source can only be multiplexed by any channel of certain
-group, DMAMUX0 or DMAMUX1, but not both.
-
-* eDMA Controller
-Required properties:
-- compatible :
-	- "fsl,vf610-edma" for eDMA used similar to that on Vybrid vf610 SoC
-	- "fsl,imx7ulp-edma" for eDMA2 used similar to that on i.mx7ulp
-	- "fsl,ls1028a-edma" followed by "fsl,vf610-edma" for eDMA used on the
-	  LS1028A SoC.
-- reg : Specifies base physical address(s) and size of the eDMA registers.
-	The 1st region is eDMA control register's address and size.
-	The 2nd and the 3rd regions are programmable channel multiplexing
-	control register's address and size.
-- interrupts : A list of interrupt-specifiers, one for each entry in
-	interrupt-names on vf610 similar SoC. But for i.mx7ulp per channel
-	per transmission interrupt, total 16 channel interrupt and 1
-	error interrupt(located in the last), no interrupt-names list on
-	i.mx7ulp for clean on dts.
-- #dma-cells : Must be <2>.
-	The 1st cell specifies the DMAMUX(0 for DMAMUX0 and 1 for DMAMUX1).
-	Specific request source can only be multiplexed by specific channels
-	group called DMAMUX.
-	The 2nd cell specifies the request source(slot) ID.
-	See the SoC's reference manual for all the supported request sources.
-- dma-channels : Number of channels supported by the controller
-- clock-names : A list of channel group clock names. Should contain:
-	"dmamux0" - clock name of mux0 group
-	"dmamux1" - clock name of mux1 group
-	Note: No dmamux0 on i.mx7ulp, but another 'dma' clk added on i.mx7ulp.
-- clocks : A list of phandle and clock-specifier pairs, one for each entry in
-	clock-names.
-
-Optional properties:
-- big-endian: If present registers and hardware scatter/gather descriptors
-	of the eDMA are implemented in big endian mode, otherwise in little
-	mode.
-- interrupt-names : Should contain the below on vf610 similar SoC but not used
-	on i.mx7ulp similar SoC:
-	"edma-tx" - the transmission interrupt
-	"edma-err" - the error interrupt
-
-
-Examples:
-
-edma0: dma-controller@40018000 {
-	#dma-cells = <2>;
-	compatible = "fsl,vf610-edma";
-	reg = <0x40018000 0x2000>,
-		<0x40024000 0x1000>,
-		<0x40025000 0x1000>;
-	interrupts = <0 8 IRQ_TYPE_LEVEL_HIGH>,
-		<0 9 IRQ_TYPE_LEVEL_HIGH>;
-	interrupt-names = "edma-tx", "edma-err";
-	dma-channels = <32>;
-	clock-names = "dmamux0", "dmamux1";
-	clocks = <&clks VF610_CLK_DMAMUX0>,
-		<&clks VF610_CLK_DMAMUX1>;
-}; /* vf610 */
-
-edma1: dma-controller@40080000 {
-	#dma-cells = <2>;
-	compatible = "fsl,imx7ulp-edma";
-	reg = <0x40080000 0x2000>,
-		<0x40210000 0x1000>;
-	dma-channels = <32>;
-	interrupts = <GIC_SPI 0 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 2 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 4 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 5 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 7 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 8 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 10 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 11 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 14 IRQ_TYPE_LEVEL_HIGH>,
-		     <GIC_SPI 15 IRQ_TYPE_LEVEL_HIGH>,
-		     /* last is eDMA2-ERR interrupt */
-		     <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
-	clock-names = "dma", "dmamux0";
-	clocks = <&pcc2 IMX7ULP_CLK_DMA1>,
-		 <&pcc2 IMX7ULP_CLK_DMA_MUX1>;
-}; /* i.mx7ulp */
-
-* DMA clients
-DMA client drivers that uses the DMA function must use the format described
-in the dma.txt file, using a two-cell specifier for each channel: the 1st
-specifies the channel group(DMAMUX) in which this request can be multiplexed,
-and the 2nd specifies the request source.
-
-Examples:
-
-sai2: sai@40031000 {
-	compatible = "fsl,vf610-sai";
-	reg = <0x40031000 0x1000>;
-	interrupts = <0 86 IRQ_TYPE_LEVEL_HIGH>;
-	clock-names = "sai";
-	clocks = <&clks VF610_CLK_SAI2>;
-	dma-names = "tx", "rx";
-	dmas = <&edma0 0 21>,
-		<&edma0 0 20>;
-};
diff --git a/Documentation/devicetree/bindings/dma/mediatek,uart-dma.yaml b/Documentation/devicetree/bindings/dma/mediatek,uart-dma.yaml
index 54d68fc688b5..19ea8dcbcbce 100644
--- a/Documentation/devicetree/bindings/dma/mediatek,uart-dma.yaml
+++ b/Documentation/devicetree/bindings/dma/mediatek,uart-dma.yaml
@@ -22,6 +22,7 @@ properties:
       - items:
           - enum:
               - mediatek,mt2712-uart-dma
+              - mediatek,mt8365-uart-dma
               - mediatek,mt8516-uart-dma
           - const: mediatek,mt6577-uart-dma
       - enum:
diff --git a/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml b/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml
index 9dd1476d1849..7e575296df0c 100644
--- a/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml
+++ b/Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml
@@ -23,7 +23,9 @@ properties:
     oneOf:
       - const: nvidia,tegra186-gpcdma
       - items:
-          - const: nvidia,tegra194-gpcdma
+          - enum:
+              - nvidia,tegra234-gpcdma
+              - nvidia,tegra194-gpcdma
           - const: nvidia,tegra186-gpcdma
 
   "#dma-cells":
diff --git a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
index 4324a94b26b2..67aa7bb6d36a 100644
--- a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
+++ b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
@@ -34,7 +34,12 @@ properties:
       - const: axidma_apb_regs
 
   interrupts:
-    maxItems: 1
+    description:
+      If the IP-core synthesis parameter DMAX_INTR_IO_TYPE is set to 1, this
+      will be per-channel interrupts. Otherwise, this is a single combined IRQ
+      for all channels.
+    minItems: 1
+    maxItems: 8
 
   clocks:
     items:
diff --git a/Documentation/devicetree/bindings/dma/ste-dma40.txt b/Documentation/devicetree/bindings/dma/ste-dma40.txt
deleted file mode 100644
index 99ab5c4d331e..000000000000
--- a/Documentation/devicetree/bindings/dma/ste-dma40.txt
+++ /dev/null
@@ -1,138 +0,0 @@
-* DMA40 DMA Controller
-
-Required properties:
-- compatible: "stericsson,dma40"
-- reg: Address range of the DMAC registers
-- reg-names: Names of the above areas to use during resource look-up
-- interrupt: Should contain the DMAC interrupt number
-- #dma-cells: must be <3>
-- memcpy-channels: Channels to be used for memcpy
-
-Optional properties:
-- dma-channels: Number of channels supported by hardware - if not present
-		the driver will attempt to obtain the information from H/W
-- disabled-channels: Channels which can not be used
-
-Example:
-
-	dma: dma-controller@801c0000 {
-		compatible = "stericsson,db8500-dma40", "stericsson,dma40";
-		reg = <0x801C0000 0x1000  0x40010000 0x800>;
-		reg-names = "base", "lcpa";
-		interrupt-parent = <&intc>;
-		interrupts = <0 25 0x4>;
-
-		#dma-cells = <2>;
-		memcpy-channels  = <56 57 58 59 60>;
-		disabled-channels  = <12>;
-		dma-channels = <8>;
-	};
-
-Clients
-Required properties:
-- dmas: Comma separated list of dma channel requests
-- dma-names: Names of the aforementioned requested channels
-
-Each dmas request consists of 4 cells:
-  1. A phandle pointing to the DMA controller
-  2. Device signal number, the signal line for single and burst requests
-     connected from the device to the DMA40 engine
-  3. The DMA request line number (only when 'use fixed channel' is set)
-  4. A 32bit mask specifying; mode, direction and endianness
-     [NB: This list will grow]
-        0x00000001: Mode:
-                Logical channel when unset
-                Physical channel when set
-        0x00000002: Direction:
-                Memory to Device when unset
-                Device to Memory when set
-        0x00000004: Endianness:
-                Little endian when unset
-                Big endian when set
-        0x00000008: Use fixed channel:
-                Use automatic channel selection when unset
-                Use DMA request line number when set
-        0x00000010: Set channel as high priority:
-                Normal priority when unset
-                High priority when set
-
-Existing signal numbers for the DB8500 ASIC. Unless specified, the signals are
-bidirectional, i.e. the same for RX and TX operations:
-
-0:  SPI controller 0
-1:  SD/MMC controller 0 (unused)
-2:  SD/MMC controller 1 (unused)
-3:  SD/MMC controller 2 (unused)
-4:  I2C port 1
-5:  I2C port 3
-6:  I2C port 2
-7:  I2C port 4
-8:  Synchronous Serial Port SSP0
-9:  Synchronous Serial Port SSP1
-10: Multi-Channel Display Engine MCDE RX
-11: UART port 2
-12: UART port 1
-13: UART port 0
-14: Multirate Serial Port MSP2
-15: I2C port 0
-16: USB OTG in/out endpoints 7 & 15
-17: USB OTG in/out endpoints 6 & 14
-18: USB OTG in/out endpoints 5 & 13
-19: USB OTG in/out endpoints 4 & 12
-20: SLIMbus or HSI channel 0
-21: SLIMbus or HSI channel 1
-22: SLIMbus or HSI channel 2
-23: SLIMbus or HSI channel 3
-24: Multimedia DSP SXA0
-25: Multimedia DSP SXA1
-26: Multimedia DSP SXA2
-27: Multimedia DSP SXA3
-28: SD/MM controller 2
-29: SD/MM controller 0
-30: MSP port 1 on DB8500 v1, MSP port 3 on DB8500 v2
-31: MSP port 0 or SLIMbus channel 0
-32: SD/MM controller 1
-33: SPI controller 2
-34: i2c3 RX2 TX2
-35: SPI controller 1
-36: USB OTG in/out endpoints 3 & 11
-37: USB OTG in/out endpoints 2 & 10
-38: USB OTG in/out endpoints 1 & 9
-39: USB OTG in/out endpoints 8
-40: SPI controller 3
-41: SD/MM controller 3
-42: SD/MM controller 4
-43: SD/MM controller 5
-44: Multimedia DSP SXA4
-45: Multimedia DSP SXA5
-46: SLIMbus channel 8 or Multimedia DSP SXA6
-47: SLIMbus channel 9 or Multimedia DSP SXA7
-48: Crypto Accelerator 1
-49: Crypto Accelerator 1 TX or Hash Accelerator 1 TX
-50: Hash Accelerator 1 TX
-51: memcpy TX (to be used by the DMA driver for memcpy operations)
-52: SLIMbus or HSI channel 4
-53: SLIMbus or HSI channel 5
-54: SLIMbus or HSI channel 6
-55: SLIMbus or HSI channel 7
-56: memcpy (to be used by the DMA driver for memcpy operations)
-57: memcpy (to be used by the DMA driver for memcpy operations)
-58: memcpy (to be used by the DMA driver for memcpy operations)
-59: memcpy (to be used by the DMA driver for memcpy operations)
-60: memcpy (to be used by the DMA driver for memcpy operations)
-61: Crypto Accelerator 0
-62: Crypto Accelerator 0 TX or Hash Accelerator 0 TX
-63: Hash Accelerator 0 TX
-
-Example:
-
-	uart@80120000 {
-		compatible = "arm,pl011", "arm,primecell";
-		reg = <0x80120000 0x1000>;
-		interrupts = <0 11 0x4>;
-
-		dmas = <&dma 13 0 0x2>, /* Logical - DevToMem */
-		       <&dma 13 0 0x0>; /* Logical - MemToDev */
-		dma-names = "rx", "rx";
-
-	};
diff --git a/Documentation/devicetree/bindings/dma/stericsson,dma40.yaml b/Documentation/devicetree/bindings/dma/stericsson,dma40.yaml
new file mode 100644
index 000000000000..8bddfb3b6fa0
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/stericsson,dma40.yaml
@@ -0,0 +1,159 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/stericsson,dma40.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ST-Ericsson DMA40 DMA Engine
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+
+allOf:
+  - $ref: "dma-controller.yaml#"
+
+properties:
+  "#dma-cells":
+    const: 3
+    description: |
+      The first cell is the unique device channel number as indicated by this
+      table for DB8500 which is the only ASIC known to use DMA40:
+
+      0:  SPI controller 0
+      1:  SD/MMC controller 0 (unused)
+      2:  SD/MMC controller 1 (unused)
+      3:  SD/MMC controller 2 (unused)
+      4:  I2C port 1
+      5:  I2C port 3
+      6:  I2C port 2
+      7:  I2C port 4
+      8:  Synchronous Serial Port SSP0
+      9:  Synchronous Serial Port SSP1
+      10: Multi-Channel Display Engine MCDE RX
+      11: UART port 2
+      12: UART port 1
+      13: UART port 0
+      14: Multirate Serial Port MSP2
+      15: I2C port 0
+      16: USB OTG in/out endpoints 7 & 15
+      17: USB OTG in/out endpoints 6 & 14
+      18: USB OTG in/out endpoints 5 & 13
+      19: USB OTG in/out endpoints 4 & 12
+      20: SLIMbus or HSI channel 0
+      21: SLIMbus or HSI channel 1
+      22: SLIMbus or HSI channel 2
+      23: SLIMbus or HSI channel 3
+      24: Multimedia DSP SXA0
+      25: Multimedia DSP SXA1
+      26: Multimedia DSP SXA2
+      27: Multimedia DSP SXA3
+      28: SD/MMC controller 2
+      29: SD/MMC controller 0
+      30: MSP port 1 on DB8500 v1, MSP port 3 on DB8500 v2
+      31: MSP port 0 or SLIMbus channel 0
+      32: SD/MMC controller 1
+      33: SPI controller 2
+      34: i2c3 RX2 TX2
+      35: SPI controller 1
+      36: USB OTG in/out endpoints 3 & 11
+      37: USB OTG in/out endpoints 2 & 10
+      38: USB OTG in/out endpoints 1 & 9
+      39: USB OTG in/out endpoints 8
+      40: SPI controller 3
+      41: SD/MMC controller 3
+      42: SD/MMC controller 4
+      43: SD/MMC controller 5
+      44: Multimedia DSP SXA4
+      45: Multimedia DSP SXA5
+      46: SLIMbus channel 8 or Multimedia DSP SXA6
+      47: SLIMbus channel 9 or Multimedia DSP SXA7
+      48: Crypto Accelerator 1
+      49: Crypto Accelerator 1 TX or Hash Accelerator 1 TX
+      50: Hash Accelerator 1 TX
+      51: memcpy TX (to be used by the DMA driver for memcpy operations)
+      52: SLIMbus or HSI channel 4
+      53: SLIMbus or HSI channel 5
+      54: SLIMbus or HSI channel 6
+      55: SLIMbus or HSI channel 7
+      56: memcpy (to be used by the DMA driver for memcpy operations)
+      57: memcpy (to be used by the DMA driver for memcpy operations)
+      58: memcpy (to be used by the DMA driver for memcpy operations)
+      59: memcpy (to be used by the DMA driver for memcpy operations)
+      60: memcpy (to be used by the DMA driver for memcpy operations)
+      61: Crypto Accelerator 0
+      62: Crypto Accelerator 0 TX or Hash Accelerator 0 TX
+      63: Hash Accelerator 0 TX
+
+      The second cell is the DMA request line number. This is only used when
+      a fixed channel is allocated, and indicated by setting bit 3 in the
+      flags field (see below).
+
+      The third cell is a 32bit flags bitfield with the following possible
+      bits set:
+      0x00000001 (bit 0) - mode:
+        Logical channel when unset
+        Physical channel when set
+      0x00000002 (bit 1) - direction:
+        Memory to Device when unset
+        Device to Memory when set
+      0x00000004 (bit 2) - endianness:
+        Little endian when unset
+        Big endian when set
+      0x00000008 (bit 3) - use fixed channel:
+        Use automatic channel selection when unset
+        Use DMA request line number when set
+      0x00000010 (bit 4) - set channel as high priority:
+        Normal priority when unset
+        High priority when set
+
+  compatible:
+    items:
+      - const: stericsson,db8500-dma40
+      - const: stericsson,dma40
+
+  reg:
+    items:
+      - description: DMA40 memory base
+      - description: LCPA memory base
+
+  reg-names:
+    items:
+      - const: base
+      - const: lcpa
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  memcpy-channels:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description: Array of u32 elements indicating which channels on the DMA
+      engine are elegible for memcpy transfers
+
+required:
+  - "#dma-cells"
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - memcpy-channels
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/mfd/dbx500-prcmu.h>
+    dma-controller@801C0000 {
+      compatible = "stericsson,db8500-dma40", "stericsson,dma40";
+      reg = <0x801C0000 0x1000>, <0x40010000 0x800>;
+      reg-names = "base", "lcpa";
+      interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;
+      #dma-cells = <3>;
+      memcpy-channels = <56 57 58 59 60>;
+      clocks = <&prcmu_clk PRCMU_DMACLK>;
+    };
+...