From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) (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 B67BE2D8760; Mon, 9 Mar 2026 12:02:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=68.232.154.123 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773057742; cv=none; b=HJLZJQRIY0PGt3S9Qx2HysWZ4W3NrYxLP9f9DN9cYpf/gw5Tq8z1g0+12N9kNndYyJS/RoEtgxE408nP4U8445qjaIOArCbzzxT4dgbl5MsGq5cVLR+vJde4AsIN+alY6z/A/896sWCCdEgeNoNj5Q/O1K7q7KewsJMpyJPJnoE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773057742; c=relaxed/simple; bh=wGTbkfjeanjsGHLlBnciuEAG03Lka3mLWvD+UVwQsPE=; h=Message-ID:Subject:From:To:CC:Date:In-Reply-To:References: Content-Type:MIME-Version; b=CqnqJzJTZOy5Cx9BrFj0btis9y5wCxRCwpWppoZzRhOMupGjndDLztf9N16eWMfkpdP1jNIPMfBkbc4EoKaAl1mRJLbZKlWZptZmWNgDNc9tNaEbFUhIosZLb4HqN9AtEE6zYxU0l47zuCcfkKLK+CM680VPlK9fBoLG8ibTRdY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com; spf=pass smtp.mailfrom=microchip.com; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b=eaXbyg3e; arc=none smtp.client-ip=68.232.154.123 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=microchip.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=microchip.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=microchip.com header.i=@microchip.com header.b="eaXbyg3e" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1773057740; x=1804593740; h=message-id:subject:from:to:cc:date:in-reply-to: references:content-transfer-encoding:mime-version; bh=wGTbkfjeanjsGHLlBnciuEAG03Lka3mLWvD+UVwQsPE=; b=eaXbyg3eRpWIm2BgkBnQcSGh1HlCiliAXMBbEerDvBWAZWBVWBEm6mj/ xzfHDBdlX2Pfy0ERKMbx1/sJGgWF53QFOAti2H88EdxmwhUSVIdd0myhk zrV3ror1q1eLqWnWQWlkDpxlC7Gi5C1Vs4xz14trP1aVPxP1VnnQ+7YTw eL6CgBipIxqquYM/m5Ozw8lUarAxGB0u1pVoPGbNvUiNv8XgW+1EzEssE 1xhlzJJ2p/bRM0YvWTX2Caw0vIT+cGpKOo5WsfKqQ3inDz/z5SW58cLCI o3945qO7ZMCPNzgLSwBG7ELvJmcJjbtWavIRHIo13ss7WeowmKc/md4YV A==; X-CSE-ConnectionGUID: 8R/phQWZRI6fu2TD0sTFng== X-CSE-MsgGUID: 6AT/zOu/RQyzargWDNfFQA== X-IronPort-AV: E=Sophos;i="6.23,109,1770620400"; d="scan'208";a="221669965" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa6.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 09 Mar 2026 05:02:19 -0700 Received: from chn-vm-ex03.mchp-main.com (10.10.85.151) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.58; Mon, 9 Mar 2026 05:01:49 -0700 Received: from [10.205.29.43] (10.10.85.11) by chn-vm-ex03.mchp-main.com (10.10.85.151) with Microsoft SMTP Server id 15.1.2507.58 via Frontend Transport; Mon, 9 Mar 2026 05:01:45 -0700 Message-ID: <1f2635864103b5de974c95ea60c0e1fac1d07302.camel@microchip.com> Subject: Re: [PATCH net-next 4/8] net: dsa: lan9645x: add basic dsa driver for LAN9645X From: Jens Emil Schulz Ostergaard To: Andrew Lunn CC: Alexander Stein , "Russell King (Oracle)" , , Vladimir Oltean , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Woojung Huh , "Steen Hegelund" , Daniel Machon , , , Date: Mon, 9 Mar 2026 13:01:34 +0100 In-Reply-To: <332bf6a6-ce9f-46d7-a2f9-10b5531598d2@lunn.ch> References: <20260303-dsa_lan9645x_switch_driver_base-v1-0-bff8ca1396f5@microchip.com> <32b7267f84b60a4632eb643fd0b999d03c630a1d.camel@microchip.com> <052cf8c8-c60b-461a-86ce-aac8d7ebf4d9@lunn.ch> <7365618.GXAFRqVoOG@steina-w> <3de08c66-adc8-455d-b23c-b3464153b38c@lunn.ch> <332bf6a6-ce9f-46d7-a2f9-10b5531598d2@lunn.ch> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.52.3-0ubuntu1.1 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Fri, 2026-03-06 at 17:33 +0100, Andrew Lunn wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know th= e content is safe >=20 > On Fri, Mar 06, 2026 at 04:03:36PM +0100, Jens Emil Schulz Ostergaard wro= te: > > On Thu, 2026-03-05 at 18:37 +0100, Andrew Lunn wrote: > > > EXTERNAL EMAIL: Do not click links or open attachments unless you kno= w the content is safe > > >=20 > > > > > However, this is a multi-giga switch, with high speed SERDES port= s. My > > > > > guess is, a SERDES port is used to connect to the host, not RGMII= . So > > > > > i would not implement this, until somebody reports having a board= with > > > > > RGMII connecting to the host. KISS. > > > >=20 > > > > We intend to do exactly that with this switch, just because the hos= t > > > > doesn't support SGMII, just RMII/RGMII. > > >=20 > > > :-) > > >=20 > > > Then i suggest using {rx|tx}-internal-delay-ps as Vladimir suggested. > > >=20 > > > Andrew > >=20 > > OK, I will use {rx|tx}-internal-delay-ps instead. I can add that the > > current EVB board for lan9645x also uses RGMI mac2mac to the host, so t= here > > are already users who would appreciate this. This is the LAN96459 EDS2 > > Daughter Card with part number EV14H52A. >=20 > O.K. Do you plan to add a DT file for this? Since it is a daughter > card, is it a DT overlay? I see there is an I2C EEPROM, used for board > identification. So that tells you which overlay to load? >=20 > Andrew Yes, we would like to add a DT, and it would be an as an overlay. I believe the EEPROM was intended for the firmware in unmanaged mode. We do not use it for managed mode at the moment. Thanks, Emil