From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.153.233]) (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 EFCA234CFAC; Fri, 6 Mar 2026 15:04:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=68.232.153.233 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772809445; cv=none; b=pJ+w+EnJpZTN/Ca+W3I6adyq6FH92rkIa+GqkyCrbiNVy78BLS0bqlZsnhoIkBZ0UiKGA7CfGTkDAqPOThgk/MDAwT1h0OPFucWFurG6zYbil7+sJsxPrsoxY05PzlGKwGiBTwc3mPnn6CdVxjGDgR0TMt6vpbjabSsIDf11U2c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772809445; c=relaxed/simple; bh=+GSPKsX+wiZt0TDUlAbsZ6opCaFV0CJfbkG8Q8nCa00=; h=Message-ID:Subject:From:To:CC:Date:In-Reply-To:References: Content-Type:MIME-Version; b=iCKY8pmJo8hw9Whvezadw8/g0YKPiTh+jlp2dg8fXZ+wdtzK5gOBxSI5VE/aoyWvEfigea1rI3XO/Fk+GyII1p3dCseOfD4pzq5FHFryHd8IPxqllVNLM/Mq7dtuqLjerzoABb+NWwQyLFZ2//iz0AQXLI4Q493AQ0RY1yPsrWs= 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=Oq3Gq5UA; arc=none smtp.client-ip=68.232.153.233 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="Oq3Gq5UA" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1772809442; x=1804345442; h=message-id:subject:from:to:cc:date:in-reply-to: references:content-transfer-encoding:mime-version; bh=+GSPKsX+wiZt0TDUlAbsZ6opCaFV0CJfbkG8Q8nCa00=; b=Oq3Gq5UAcHIt+j2zjVNhaAy8c//6gtmmFsbdgt4FxIuY9mExzwNQL8dA cKZrbKXxb+J9YGISXouX0gjlJ2Y2It383axdI6/xLuj5BDdvWdbB4DgVg N13yFXW7B10A1Vr+mm71VXLYMhIL8Ivd0jZJW0bVv4GCjA8svgIPX+rQG TJKhyK1h+s2+HL7RtEx+VzbHza9s8opNfzBj0R4ef5eapXeuDZ8YWbAfn cIPBMFv1oJTYonZSCBCSlR7dgYf+ahzI1Dz9sFgl9RfMFZ05EP/99y7AZ 2OCJNdKj7cJCljIzKj1+E0DD8Mq7HpxDTIpZO1UoNLSUf+0T8AlL1+p9v Q==; X-CSE-ConnectionGUID: yLYBE7KDSpW0bGTGyPDRgQ== X-CSE-MsgGUID: IZo8rPJtTGKLzpnGaenkgw== X-IronPort-AV: E=Sophos;i="6.23,105,1770620400"; d="scan'208";a="54322423" X-Amp-Result: SKIPPED(no attachment in message) Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa3.microchip.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 06 Mar 2026 08:04:01 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) 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; Fri, 6 Mar 2026 08:03:39 -0700 Received: from DEN-DL-M77643.microsemi.net (10.10.85.11) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.2507.58 via Frontend Transport; Fri, 6 Mar 2026 08:03:36 -0700 Message-ID: Subject: Re: [PATCH net-next 4/8] net: dsa: lan9645x: add basic dsa driver for LAN9645X From: Jens Emil Schulz Ostergaard To: Andrew Lunn , Alexander Stein CC: "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: Fri, 6 Mar 2026 16:03:36 +0100 In-Reply-To: <3de08c66-adc8-455d-b23c-b3464153b38c@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> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.44.4-0ubuntu2.1 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Thu, 2026-03-05 at 18:37 +0100, Andrew Lunn wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know th= e content is safe >=20 > > > However, this is a multi-giga switch, with high speed SERDES ports. M= y > > > 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 wit= h > > > RGMII connecting to the host. KISS. > >=20 > > We intend to do exactly that with this switch, just because the host > > doesn't support SGMII, just RMII/RGMII. >=20 > :-) >=20 > Then i suggest using {rx|tx}-internal-delay-ps as Vladimir suggested. >=20 > Andrew OK, I will use {rx|tx}-internal-delay-ps instead. I can add that the=C2=A0 current EVB board for lan9645x also uses RGMI mac2mac to the host, so there are already users who would appreciate this. This is the LAN96459 EDS2=C2= =A0 Daughter Card with part number EV14H52A. Thanks, Emil