From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from vps0.lunn.ch (vps0.lunn.ch [156.67.10.101]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C38A9393DC7; Tue, 4 Aug 2026 14:41:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=156.67.10.101 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785854498; cv=none; b=RUJ0ijYaocAlk09mRhvLSTBPYVJu7LhCXxneuqFGvLjf3c3u9C0hV7wIfEejToMAhopwPxnoWHtIuBkxYMpPHdZH/edEDVMZ1r+zxK/+5f9uhH3d6E6vK2pUeUDdVPwCRpxtvRX7MtuQX6OZ5WVaOmftoluCnIECDM8UlRw62GA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785854498; c=relaxed/simple; bh=inRu6Fbs7qThKSOM6o9E9Nl5mQBWDBycP7w/R/gVngs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=DiIhGX7RLhTpmxEH7nzJMnGwqMZl0erhy4uB9KmyCVRKh2cqiQ+D3FRKSU/sYlQSI9KPK34vKCg8K7KTmn5rAR+tO/yFGB+0o2uMtkbrL2I2TXS1kNKqZ2k6QFcAUWzdeOteAaA8R4Fjq4p8bSYvxlnMxOHV5QwZXjQxktRGdnY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lunn.ch; spf=pass smtp.mailfrom=lunn.ch; dkim=pass (1024-bit key) header.d=lunn.ch header.i=@lunn.ch header.b=1ZUeJZTS; arc=none smtp.client-ip=156.67.10.101 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lunn.ch Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lunn.ch Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=lunn.ch header.i=@lunn.ch header.b="1ZUeJZTS" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lunn.ch; s=20171124; h=In-Reply-To:Content-Transfer-Encoding:Content-Disposition: Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:From: Sender:Reply-To:Subject:Date:Message-ID:To:Cc:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Content-Disposition: In-Reply-To:References; bh=N+1oknWBbbON9BY5ecDuc0sEWzNlET//gb3rEdeh9dE=; b=1Z UeJZTSG3izFxwlrJtuzKhrETd1JhkCo9tlUOiiqsjNqoV7GW5lSKFvO8PQhsCz7F+weHtmsSmKtqR 0iGNg+f+vpsYoDEWJTyV+4/bw1/3+QNq//KtLiGtLCep1CguoUmst3OHrPOuJ5CqXP8nhAHBg72if jDHbB/Khw3tZEzU=; Received: from andrew by vps0.lunn.ch with local (Exim 4.94.2) (envelope-from ) id 1wrGKa-00G0IZ-MM; Tue, 04 Aug 2026 16:41:24 +0200 Date: Tue, 4 Aug 2026 16:41:24 +0200 From: Andrew Lunn To: Artem Shimko Cc: netdev@vger.kernel.org, Heiner Kallweit , Russell King , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Maxime Chevallier , linux-kernel@vger.kernel.org, devicetree@vger.kernel.org Subject: Re: [PATCH net-next v5 0/3] Add DAPU Telecom DAP8211R(I) Gigabit Ethernet PHY driver Message-ID: <5ce27e97-bb4a-4f17-a445-16331af0a6f5@lunn.ch> References: <20260803101734.270821-1-a.shimko.dev@gmail.com> <94fb1a6e-71d6-42ae-b221-cc03a820d2e0@lunn.ch> <2ccd6223-dd40-406b-8869-021881755f72@lunn.ch> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Tue, Aug 04, 2026 at 05:08:49PM +0300, Artem Shimko wrote: > Hi Andrew, > > On Tue, Aug 4, 2026 at 4:32 PM Andrew Lunn wrote: > > That is a very odd setup, half the 2ns delay the RGMII standard asks > > for? Do you have an explanation for this? > I think this is a poor example, as the delay is due to clock inversion > due to a mismatch in the PCB parameters. Ah! Another things to explain with a comment... Andrew