linux-kernel - [PATCH 2/3] dt-bindings: PCI: pci-ep: Extend max-link-speed to PCIe Gen5/Gen6

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Message-Id: <20250519160448.209461-3-18255117159@163.com>
Date: Tue, 20 May 2025 00:04:47 +0800
From: Hans Zhang <18255117159@....com>
To: bhelgaas@...gle.com,
	lpieralisi@...nel.org,
	kw@...ux.com,
	krzk+dt@...nel.org,
	manivannan.sadhasivam@...aro.org,
	conor+dt@...nel.org
Cc: robh@...nel.org,
	linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	Hans Zhang <18255117159@....com>
Subject: [PATCH 2/3] dt-bindings: PCI: pci-ep: Extend max-link-speed to PCIe Gen5/Gen6

Update the PCI Endpoint (EP) device tree binding documentation to
include PCIe Gen5 and Gen6 support for the `max-link-speed` property.
Similar to the Host Controller binding, the original EP binding
limited this value to 1~4 (Gen1~Gen4). With current SOCs requiring
Gen5/Gen6 support (e.g., Synopsys/Cadence IP), this change aligns
the EP binding with the kernel's PCIe 6.0 capabilities.

Signed-off-by: Hans Zhang <18255117159@....com>
---
 Documentation/devicetree/bindings/pci/pci-ep.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/pci/pci-ep.yaml b/Documentation/devicetree/bindings/pci/pci-ep.yaml
index f75000e3093d..68aaad70b112 100644
--- a/Documentation/devicetree/bindings/pci/pci-ep.yaml
+++ b/Documentation/devicetree/bindings/pci/pci-ep.yaml
@@ -33,7 +33,7 @@ properties:
 
   max-link-speed:
     $ref: /schemas/types.yaml#/definitions/uint32
-    enum: [ 1, 2, 3, 4 ]
+    enum: [ 1, 2, 3, 4, 5, 6]
 
   num-lanes:
     description: maximum number of lanes
-- 
2.25.1