dt-bindings: dma: ti,cppi41: Convert to DT schema

Convert TI CPPI 4.1 DMA controller text bindings to DT schema. Add
ti,am3359-cppi41 and ti,da830-cppi41 into single schema since they share
the same hardware IP block and driver. Add undocumented #dma-requests
and power-domains properties to match existing DTS usage.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Bhargav Joshi <j.bhargav.u@gmail.com>
Link: https://patch.msgid.link/20260901-ti-am33-usb-v3-1-5e15c617d2e9@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

Documentation/devicetree/bindings/dma/ti/ti,cppi41.yaml

@@ -0,0 +1,109 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/ti/ti,cppi41.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI CPPI41 DMA Controller
+
+maintainers:
+  - Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+
+properties:
+  compatible:
+    enum:
+      - ti,am3359-cppi41
+      - ti,da830-cppi41
+
+  reg:
+    minItems: 3
+    maxItems: 4
+
+  reg-names:
+    minItems: 3
+    maxItems: 4
+
+  interrupts:
+    maxItems: 1
+
+  interrupt-names:
+    const: glue
+
+  "#dma-cells":
+    const: 2
+
+  dma-channels:
+    description: Number of DMA channels supported.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  dma-requests:
+    description: Number of DMA requests supported.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  power-domains:
+    maxItems: 1
+
+  "#dma-channels":
+    description: Deprecated, use dma-channels instead.
+    deprecated: true
+
+  "#dma-requests":
+    description: Deprecated, use dma-requests instead.
+    deprecated: true
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - "#dma-cells"
+  - dma-channels
+
+allOf:
+  - $ref: /schemas/dma/dma-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: ti,am3359-cppi41
+    then:
+      properties:
+        reg:
+          minItems: 4
+        reg-names:
+          items:
+            - const: glue
+            - const: controller
+            - const: scheduler
+            - const: queuemgr
+        power-domains: false
+      required:
+        - interrupt-names
+        - interrupts
+        - dma-requests
+    else:
+      properties:
+        reg:
+          maxItems: 3
+        reg-names:
+          items:
+            - const: controller
+            - const: scheduler
+            - const: queuemgr
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    dma-controller@7402000 {
+        compatible = "ti,am3359-cppi41";
+        reg = <0x47400000 0x1000>,
+              <0x47402000 0x1000>,
+              <0x47403000 0x1000>,
+              <0x47404000 0x4000>;
+        reg-names = "glue", "controller", "scheduler", "queuemgr";
+        interrupts = <17>;
+        interrupt-names = "glue";
+        #dma-cells = <2>;
+        dma-channels = <30>;
+        dma-requests = <256>;
+    };

Documentation/devicetree/bindings/usb/am33xx-usb.txt

@@ -51,20 +51,6 @@ USB
 The controller should have an "usb" alias numbered properly in the alias
 node.
 
-DMA
-~~~
-- compatible: ti,am3359-cppi41
-- reg: offset and length of the following register spaces: USBSS, USB
-  CPPI DMA Controller, USB CPPI DMA Scheduler, USB Queue Manager
-- reg-names: glue, controller, scheduler, queuemgr
-- #dma-cells: should be set to 2. The first number represents the
-  endpoint number (0 … 14 for endpoints 1 … 15 on instance 0 and 15 … 29
-  for endpoints 1 … 15 on instance 1). The second number is 0 for RX and
-  1 for TX transfers.
-- dma-channels: should be set to 30 representing the 15 endpoints for
-  each USB instance.
-- #dma-channels: deprecated
-
 Example:
 ~~~~~~~~
 The following example contains all the nodes as used on am335x-evm:

Documentation/devicetree/bindings/usb/da8xx-usb.txt

@@ -27,18 +27,6 @@ Optional properties:
 ~~~~~~~~~~~~~~~~~~~~
  - vbus-supply: Phandle to a regulator providing the USB bus power.
 
-DMA
-~~~
-- compatible: ti,da830-cppi41
-- reg: offset and length of the following register spaces: CPPI DMA Controller,
-  CPPI DMA Scheduler, Queue Manager
-- reg-names: "controller", "scheduler", "queuemgr"
-- #dma-cells: should be set to 2. The first number represents the
-  channel number (0 … 3 for endpoints 1 … 4).
-  The second number is 0 for RX and 1 for TX transfers.
-- dma-channels: should be set to 4 representing the 4 endpoints.
-- #dma-channels: deprecated
-
 Example:
 	usb_phy: usb-phy {
 		compatible = "ti,da830-usb-phy";