linux-kernel - [PATCH 1/3] dt-bindings: usb: add missed compatible string for arm64 layerscape

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Message-Id: <20250602-ls_dma_coherence-v1-1-c67484d6ab64@nxp.com>
Date: Mon, 02 Jun 2025 18:01:01 -0400
From: Frank Li <Frank.Li@....com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Thinh Nguyen <Thinh.Nguyen@...opsys.com>, Shawn Guo <shawnguo@...nel.org>
Cc: linux-usb@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 bjorn.andersson@....qualcomm.com, Frank Li <Frank.Li@....com>
Subject: [PATCH 1/3] dt-bindings: usb: add missed compatible string for
 arm64 layerscape

Add missed compatible string for arm64 layerscape platform. Allow these
fallback to fsl,ls1028a-dwc3.

Remove fallback snps,dwc3 because layerscape dwc3 is not full compatible
with common snps,dwc3 device, a special value gsburstcfg0 need be set when
dma coherence enabled.

Allow iommus property.

Change ref to snps,dwc3-common.yaml to use dwc3 flatten library.

Signed-off-by: Frank Li <Frank.Li@....com>
---
 .../devicetree/bindings/usb/fsl,ls1028a.yaml       | 33 ++++++++++++----------
 1 file changed, 18 insertions(+), 15 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/fsl,ls1028a.yaml b/Documentation/devicetree/bindings/usb/fsl,ls1028a.yaml
index a44bdf391887f..4784f057264ac 100644
--- a/Documentation/devicetree/bindings/usb/fsl,ls1028a.yaml
+++ b/Documentation/devicetree/bindings/usb/fsl,ls1028a.yaml
@@ -9,21 +9,19 @@ title: Freescale layerscape SuperSpeed DWC3 USB SoC controller
 maintainers:
   - Frank Li <Frank.Li@....com>
 
-select:
-  properties:
-    compatible:
-      contains:
-        enum:
-          - fsl,ls1028a-dwc3
-  required:
-    - compatible
-
 properties:
   compatible:
-    items:
-      - enum:
-          - fsl,ls1028a-dwc3
-      - const: snps,dwc3
+    oneOf:
+      - items:
+          - enum:
+              - fsl,ls1012a-dwc3
+              - fsl,ls1043a-dwc3
+              - fsl,ls1046a-dwc3
+              - fsl,ls1088a-dwc3
+              - fsl,ls208xa-dwc3
+              - fsl,lx2160a-dwc3
+          - const: fsl,ls1028a-dwc3
+      - const: fsl,ls1028a-dwc3
 
   reg:
     maxItems: 1
@@ -31,6 +29,11 @@ properties:
   interrupts:
     maxItems: 1
 
+  iommus:
+    maxItems: 1
+
+  dma-coherent: true
+
 unevaluatedProperties: false
 
 required:
@@ -39,14 +42,14 @@ required:
   - interrupts
 
 allOf:
-  - $ref: snps,dwc3.yaml#
+  - $ref: snps,dwc3-common.yaml#
 
 examples:
   - |
     #include <dt-bindings/interrupt-controller/arm-gic.h>
 
     usb@...00000 {
-        compatible = "fsl,ls1028a-dwc3", "snps,dwc3";
+        compatible = "fsl,ls1028a-dwc3";
         reg = <0xfe800000 0x100000>;
         interrupts = <GIC_SPI 105 IRQ_TYPE_LEVEL_HIGH>;
     };

-- 
2.34.1