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Received: from DU4PR08MB11149.eurprd08.prod.outlook.com (2603:10a6:10:576::21) by AS8PR08MB7791.eurprd08.prod.outlook.com (2603:10a6:20b:52d::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9499.7; Wed, 14 Jan 2026 22:37:20 +0000 Received: from DU4PR08MB11149.eurprd08.prod.outlook.com ([fe80::8b3b:ee06:2f0b:a94d]) by DU4PR08MB11149.eurprd08.prod.outlook.com ([fe80::8b3b:ee06:2f0b:a94d%3]) with mapi id 15.20.9499.005; Wed, 14 Jan 2026 22:37:19 +0000 Message-ID: <20d64957-071e-428b-9875-88ddbc4dec17@genexis.eu> Date: Wed, 14 Jan 2026 23:37:18 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next v2 1/2] dt-bindings: net: airoha: npu: Add EN7581-7996 support To: linux-mediatek@lists.infradead.org References: <20260114-heretic-optimal-seahorse-bb094d@quoll> <75f9d8c9-20a9-4b7e-a41c-8a17c8288550@kernel.org> <69676b6c.050a0220.5afb9.88e4@mx.google.com> <69677256.5d0a0220.2dc5a5.fad0@mx.google.com> <76bbffa8-e830-4d02-a676-b494616568a2@lunn.ch> <6967c46a.5d0a0220.1ba90b.393c@mx.google.com> <9340a82a-bae8-4ef6-9484-3d2842cf34aa@lunn.ch> Content-Language: en-US From: Benjamin Larsson In-Reply-To: Content-Type: text/plain; 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If it can do that, why not ask it which PCI device it is > using? > > Or this the PCI slot to use somehow embedded within the firmware? > > Or is it simply hard coded in the NPU silicon which slot to use? > > Andrew > Hi, the NPU can address most of the SoC (the NPU is a cluster of RiscV-cores). The SoC when paired with a specific wifi chip needs to be matched with a specific NPU firmware. The NPU firmware seems to contain wifi chip specific code and I guess only one electrical configuration is supported. The pcie card is connected via 2 pcie busses. One dual lane pcie gen3 and one single lane pcie gen2. The NPU does not only handle wifi. It can do tunnel and IPv6-support also. So a device might not have anything connected to the pcie at all but still have a need to load a specific NPU firmware. MvH Benjamin Larsson