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 5CDDD37F313; Wed, 23 Sep 2026 22:49:57 +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=1790203799; cv=none; b=SpxzNeH3QAH3W9m6Yj4QZ6VqyI029rZoCJP4hlWJ9KHshkcrsQCc+m/QZjkb0BCF1GfLEKj02fHpCKW5KlrgwxeU7mxyo4CK4+Z8KPlqS1QUhJsi3N+AO4UAcVwdC6isgF6iupC6mwaEgSRnP34ezbBHBC6luHQrdwreCs8JfNU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790203799; c=relaxed/simple; bh=7N+PHYhwYb4DDxIKQU9bG1rsHVF5yIkzKWglWZwr0YE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=FWr2n/sYMMBmdxkuwdQcn+/GoCEUIr30rb+WBcfjVUC8V5ZqSAYVO0CZcnGYunn0IthqKj+httqNuHshtVC+v1dOeNROcRDvaO86t6fY4Epgvpmu9fan7i0luCVf6AStR1N/bhIPsOGQ5w1zFJmA7YkFgq/R+VkF7zGxjK7k+LQ= 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=l8as964Z; 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="l8as964Z" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lunn.ch; s=20171124; h=In-Reply-To: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=+L5gxY5rh4nIH2Gf98GBghWlzuQmbFzFgvb3CQBZaFY=; b=l8as964ZT6nGCW65whU2xXAnqD oXPLOPtXKMZ+QK8B4o9CEuIpg/98nkGFvLCUehUS/Q3lAiiqkdyH/5YT4kXNXnCzzkTXDMBYi6tPC lf0qnh2TfnUFhU1CIfkHjVQ7CAkk9QVA0AhP9wrRQxqCRQC+Wm8IXjqBVk/uFH8ienYM=; Received: from andrew by vps0.lunn.ch with local (Exim 4.94.2) (envelope-from ) id 1x9VmY-006tGu-UH; Thu, 24 Sep 2026 00:49:42 +0200 Date: Thu, 24 Sep 2026 00:49:42 +0200 From: Andrew Lunn To: Andre Przywara Cc: Liu Changjie , Andrew Lunn , Heiner Kallweit , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , netdev@vger.kernel.org, Russell King , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Luo Jie , Wolfram Sang , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net-next v2 0/2] net: phy: Add Maxio MAE0621A support Message-ID: <2ecfaee1-921b-4d2a-bac3-ce2467b24ea7@lunn.ch> References: <2635661d-4be2-4abf-84aa-c3024941f787@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <2635661d-4be2-4abf-84aa-c3024941f787@arm.com> > https://www.lcsc.com/datasheet/C49308069.pdf Cool, thanks for the link. 24.13 1: A broadcast from MAC (A command with PHY address = 0) is valid. MDC/MDIO will respond to this command. Please ensure this is disabled. Doing that now before anything is merged will make life easier in the future. I don't see any way to control the RGMII delays, or know how it has been strapped. So this PHY is going to be a real problem. DT developers make a mess of RGMII delays even when the MAC and PHY do the right think. Unless a way is found to either control the delays, or at least know what it is doing, the only phydev->interface accepted should be PHY_INTERFACE_MODE_NA. This means 'don't touch'. We have to assume something else has correctly set the delays in a consistent way. That is likely to be strapping. Andrew