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Mon, 2 Mar 2026 19:04:43 +0800 (CST) Date: Mon, 2 Mar 2026 19:04:42 +0800 From: Peter Chen To: Pawel Laszczak Cc: "robh@kernel.org" , "krzk+dt@kernel.org" , "conor+dt@kernel.org" , "gregkh@linuxfoundation.org" , "rogerq@kernel.org" , "devicetree@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-usb@vger.kernel.org" , "cix-kernel-upstream@cixtech.com" Subject: Re: [PATCH 2/2] dt-bindings: usb: cdns,usb3: Add support for USBSSP Message-ID: References: <20260302030339.324196-1-peter.chen@cixtech.com> <20260302030339.324196-3-peter.chen@cixtech.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: OSA0EPF000000CC:EE_|KL1PR06MB6591:EE_ X-MS-Office365-Filtering-Correlation-Id: e1bb88f4-c15a-45af-2f0d-08de784b82b1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|1800799024|36860700013; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: D8S3yXaUm4Kky1oUQpbWfZYnGYVIV/1lLtB4bojfSCZAnJL4EhF89ZUJnQpzl10L00cqclBa6j7KYUmjC3zXNiiIU1K0iHJOZEx18klMxNYWY51AZHYg9mdwKdYgqxbGIR4DgCmSHwH+f2ZEYZ+K8iTPpSg09VOfLTSLnnH9NS8+59Fxi2ZMWq9fCMJ8Ck+Wt1bPrTETtj3WXr/GHFztOQi9Mei96COxXbtI3jgbA/pm95GXTw2w6xmr3h2Hkk5ZGkJNOR/WnjRjaF+fC1CSzHBi51ZjzTRx0NdoImtfJMpkEuC/vaKQLzaTnNMvh64yXUJntiFAhdE1ydkLo1FdFHFfsmzfsTevD68Z01RC9Y3oRHYHdLEN690xG9jWKhgAim9QAuOXjtdj3HAka17qTcPjntEN88Am6RC2It0c6vBIbtlTBJHMwaX+IXIQ//pg X-OriginatorOrg: cixtech.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 02 Mar 2026 11:04:44.1610 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: e1bb88f4-c15a-45af-2f0d-08de784b82b1 X-MS-Exchange-CrossTenant-Id: 0409f77a-e53d-4d23-943e-ccade7cb4811 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=0409f77a-e53d-4d23-943e-ccade7cb4811;Ip=[222.71.101.198];Helo=[smtprelay.cixcomputing.com] X-MS-Exchange-CrossTenant-AuthSource: OSA0EPF000000CC.apcprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: KL1PR06MB6591 On 26-03-02 09:03:25, Pawel Laszczak wrote: > EXTERNAL EMAIL > > Hi Peter, > > > > >The USBSSP is the next-generation Cadence USB controller IP. It adds SuperSpeed > >Plus (USB 3.1 gen2x1, 10 Gbps) support and uses an XHCI-based device > >controller. The register layout and resource model (otg/xhci/dev memory > >regions; host/peripheral/otg interrupts) are identical to the USBSS, so both > >controllers share the same binding and the same platform driver (cdns3-plat.c). > > > > Include the change for the wakeup interrupt in the next version. > Unlike the legacy USBSS, the USBSSP IP handles device-mode wakeup events > natively through the xHCI-based Event Ring via TRBs, rather than using a > dedicated sideband interrupt line. This integration aligns the wakeup mechanism > with the standard xHCI event processing, making the separate "wakeup" > interrupt property unnecessary for this variant. > Thanks for your suggestion. This "wakeup" interrupt is not related to controller, it is the glue layer logic that detecting dp/dm/id/vbus or rx changes. -- Best regards, Peter