From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from rtits2.realtek.com.tw (rtits2.realtek.com [211.75.126.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A17C8264A73; Mon, 14 Jul 2025 15:29:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=211.75.126.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752506962; cv=none; b=R9gw07Z35NB0T1YxoK+4N8JZpTX8ma0+DMj6aEQjs6/osEKgdAwaXRxUUZwlhOabZ49cyL0Kk3kbLBYcQkbnaDz3nOZBpGr4bTtG/cf3oXitor7Lw2iSqtmvoW4U9JFMoZYpbakgLWaLAGNjOYvgRoyVi/R0IkuWg6GlfHikEMQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752506962; c=relaxed/simple; bh=kH+76pQfe8h+nA25aD3uhXFxx4VONMtqA+YpB33JP94=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: Content-Type:MIME-Version; b=ZneXn3PQE2fdF/BVqoPnkVmAHnliGls9qxWhSzWJrWPlk7TIRaSEjNnFCWnBn/VFhdHMmAXkj6Cx1TrqbzX/X4jiQYPFBDQGV1wi8bZ+bD/mV/hFToYDIOsY1wHNuHqVybmZtdVofGrY6eQpQh/9NH5WsQ5bRNvGjAD9K+scj7k= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=realtek.com; spf=pass smtp.mailfrom=realtek.com; dkim=pass (2048-bit key) header.d=realtek.com header.i=@realtek.com header.b=nRCiH0M9; arc=none smtp.client-ip=211.75.126.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=realtek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=realtek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=realtek.com header.i=@realtek.com header.b="nRCiH0M9" X-SpamFilter-By: ArmorX SpamTrap 5.80 with qID 56EFSctL62444685, This message is accepted by code: ctloc85258 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=realtek.com; s=dkim; t=1752506918; bh=kH+76pQfe8h+nA25aD3uhXFxx4VONMtqA+YpB33JP94=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: Content-Type:Content-Transfer-Encoding:MIME-Version; b=nRCiH0M9XTTm+KVkMleEMU+EQFkvopUfvgApC7PkSX+yJu1mF6n5hJSxUpnBxMfj0 9ZsRmvCLon1TuuN4DZZyfogmbtBawZHeLdpvKr3KDZsOuUODA0hm+Gjd3VHOSM1bsQ XL/+VvUCoh13bbDjF/X3FlFwdOWYNUrhuHKdNNoARBqXgm2XKMa4Q7307XVYAw/N6E qdl/2FZ530FbKb9HzokeZdvVaATz+OaCoBLkfP5lRKH/HrlZHrYH1/7+biiHyBRZY+ cr+fe2AC8vZrXAwbOa53+GtJPHUdWuhR9BeDM/bkscT4MxASNH8CA7M4fkFQiSc1eT mHtKLlGvbN0hw== Received: from mail.realtek.com (rtkexhmbs04.realtek.com.tw[10.21.1.54]) by rtits2.realtek.com.tw (8.15.2/3.13/5.93) with ESMTPS id 56EFSctL62444685 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 14 Jul 2025 23:28:38 +0800 Received: from RTEXMBS02.realtek.com.tw (172.21.6.95) by RTKEXHMBS04.realtek.com.tw (10.21.1.54) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.11; Mon, 14 Jul 2025 23:28:38 +0800 Received: from RTEXMBS04.realtek.com.tw (172.21.6.97) by RTEXMBS02.realtek.com.tw (172.21.6.95) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Mon, 14 Jul 2025 23:28:37 +0800 Received: from RTEXMBS04.realtek.com.tw ([fe80::81fc:50c6:85d5:cb47]) by RTEXMBS04.realtek.com.tw ([fe80::81fc:50c6:85d5:cb47%5]) with mapi id 15.01.2507.035; Mon, 14 Jul 2025 23:28:37 +0800 From: Hau To: Andrew Lunn CC: "hkallweit1@gmail.com" , nic_swsd , "andrew+netdev@lunn.ch" , "davem@davemloft.net" , "edumazet@google.com" , "kuba@kernel.org" , "pabeni@redhat.com" , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH net-next] r8169: add quirk for RTL8116af SerDes Thread-Topic: [PATCH net-next] r8169: add quirk for RTL8116af SerDes Thread-Index: AQHb8hYZ3m83qQJc5k6oVaa3M0JZALQvxoaAgAH73gA= Date: Mon, 14 Jul 2025 15:28:37 +0000 Message-ID: <50df9352e81e4688b917072949b2ee4c@realtek.com> References: <20250711034412.17937-1-hau@realtek.com> <9291f271-eafe-4f65-aa08-3c6cb4236f64@lunn.ch> In-Reply-To: <9291f271-eafe-4f65-aa08-3c6cb4236f64@lunn.ch> Accept-Language: zh-TW, en-US Content-Language: en-US x-kse-serverinfo: RTEXMBS02.realtek.com.tw, 9 x-kse-antispam-interceptor-info: fallback x-kse-antivirus-interceptor-info: fallback Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-KSE-AntiSpam-Interceptor-Info: fallback >=20 > Can you give us a few more details. What is on the other end of the SERDE= S? > An SGMII PHY? An SFP cage? An Ethernet switch chip? >=20 > A quick search suggests it is used with an SFP cage. How is the I2C bus > connected? What about GPIOs? Does the RTL8116af itself have GPIOs and an > I2C bus? >=20 RTL8116af 's SERDES will connect to a SFP cage. It has GPIO and a I2C bus. = But driver did not use it to access SFP cage. Driver depends on mac io 0x6c (LinkStatus) to check link status.