The devicetree bindings for Freescale DMA engines have so far existed as
a text file. This patch converts them to YAML, and specifies all the
compatible strings currently in use in arch/powerpc/boot/dts.

Signed-off-by: J. Neuschäfer <redacted>
---

V2:
- remove unnecessary multiline markers
- fix additionalProperties to always be false
- add description/maxItems to interrupts
- add missing #address-cells/#size-cells properties
- convert "Note on DMA channel compatible properties" to YAML by listing
  fsl,ssi-dma-channel as a valid compatible value
- fix property ordering in examples: compatible and reg come first
- add missing newlines in examples
- trim subject line (remove "bindings")
---
 .../devicetree/bindings/dma/fsl,elo-dma.yaml       | 140 ++++++++++++++
 .../devicetree/bindings/dma/fsl,elo3-dma.yaml      | 123 +++++++++++++
 .../devicetree/bindings/dma/fsl,eloplus-dma.yaml   | 134 ++++++++++++++
 .../devicetree/bindings/powerpc/fsl/dma.txt        | 204 ---------------------
 4 files changed, 397 insertions(+), 204 deletions(-)

diff --git a/Documentation/devicetree/bindings/dma/fsl,elo-dma.yaml b/Documentation/devicetree/bindings/dma/fsl,elo-dma.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..3d8be9973fb98891a73cb701c1f983a63f444837
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/fsl,elo-dma.yaml

@@ -0,0 +1,140 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/fsl,elo-dma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale Elo DMA Controller
+
+maintainers:
+  - J. Neuschäfer <j.ne@posteo.net>
+
+description:
+  This is a little-endian 4-channel DMA controller, used in Freescale mpc83xx
+  series chips such as mpc8315, mpc8349, mpc8379 etc.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - fsl,mpc8313-dma
+          - fsl,mpc8315-dma
+          - fsl,mpc8323-dma
+          - fsl,mpc8347-dma
+          - fsl,mpc8349-dma
+          - fsl,mpc8360-dma
+          - fsl,mpc8377-dma
+          - fsl,mpc8378-dma
+          - fsl,mpc8379-dma
+      - const: fsl,elo-dma
+
+  reg:
+    maxItems: 1
+    description:
+      DMA General Status Register, i.e. DGSR which contains status for
+      all the 4 DMA channels.
+
+  cell-index:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: Controller index. 0 for controller @ 0x8100.
+
+  ranges: true
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+  interrupts:
+    maxItems: 1
+    description: Controller interrupt.
+
+required:
+  - compatible
+  - reg
+
+patternProperties:
+  "^dma-channel@.*$":