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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?P/h041JbknUVmQsvxAkfrjnjEtxy4iMYb29yYpOUwfJvYoQVzZNqGGaA2K9j?= =?us-ascii?Q?5Ng/HWOXNY/OXIfLx0GL7/kgZAfZ89jr0eYPOfN6ywNRnv9XnYuu3dpvQ+zZ?= =?us-ascii?Q?NzRKvsOq8iBpWmVvudVJQZq5d+LkF8jkifYxiIuyFAjPDxVaPgq+MKHJMwbK?= =?us-ascii?Q?qMxhzVuWPWSXHeYoFaAFoZcQhYJGHcJKPUjhCfhU1jYYPAAHvFnREnUgT/Xf?= =?us-ascii?Q?3X6auyEMv8MpL87Gn4klZckV40hyumM65gbOHey+dIzKs7az8IkutdNvSvq7?= =?us-ascii?Q?J+Fav+ZZK2Q0gCo09Vx8EzJNuuNgOfn8N2aLnhMVCAfPXrZW1csXIraualle?= =?us-ascii?Q?wMl5kcNFwqjHI3vl095lgvxW0wHT+f6Qt1T+KRDZUU4BID8CtxsGXxoJhEHF?= =?us-ascii?Q?q3SSa21vOxgKL6k4Q8iphVkN2rNWkoAf9PTM7wtlqY9xmIhSO9WciMjj5F11?= =?us-ascii?Q?oRKENwLQHLBC1v9xP+Eh3MmG0MVjYQwd7XLQiELJVG272TyelXrxgw/E1Wvd?= =?us-ascii?Q?RiPvcFkfYDbcbBMxvg/djF0rPij8onvUOV3K2DSGb8il/o9JfAhUGV9Ipesp?= =?us-ascii?Q?j3Xuv9D2WwPxit0BGUWPrcNPDxwormZi7XAjNQtqeSN3hCN5GcP7m1ZO5az1?= =?us-ascii?Q?G4qC4qsiYsg0N2EXeRUnOBlp5x3OEX8qQI4MQ1Qj20857Lah2b4AcwAaFOK1?= =?us-ascii?Q?YANZCz8Rrn+cUPnVqzyIW1fxVT5EB+USqB/vxcX/RuKJ3lY8ZmhKYZ6+0Jew?= =?us-ascii?Q?FvjiaawxvU/cta6i3uyq21xUjFRoiKQb6DfaF+CBp+kWtKhxh/B1ZHoh66Z+?= =?us-ascii?Q?dNW5juPCx+DhFNwMjKmhuOvpW3avdoOAQLQMRHBQtZ99poK2xaYSs1MLU70a?= =?us-ascii?Q?mmqw3OyKlbVMOI1/wDee5Dg/To2NRi7asHP7/FGntpJBcdQd2dl8EOAUD7jC?= =?us-ascii?Q?RYlfJSVp8OAMTyVQAzA8t4jrFPJKHANj5n+1WbwIvPWj4V1THbXMxi6iBahX?= =?us-ascii?Q?lSvBvWoTRz5MSvZuG8FRiPi43j2ET8F/kjrB3vAFtsD95PwB/r+5HnqExfff?= =?us-ascii?Q?12Ve/Umnb84jwFrbHnETRF3k37PMfgU17Hj49taBfsEZMM6d+l8FLPv5Gu0Q?= =?us-ascii?Q?4TY3lFPoeoTgSnZxDoB7Xcd1G1XHwOVKhxtayfcpd2iS7veJXMaZg3VKcUHN?= =?us-ascii?Q?IJY7f7ylLuBG5KpULN57ekNScpA3Xkr3sDjk6OEv6VijBvOsZ7JiXER6M1Ml?= =?us-ascii?Q?6eMipZE4brShxGxz3e9XAqUTMGQef9+lreglpW/KjBP+8FOV6lZqZNkiXSdV?= =?us-ascii?Q?/wT9ojS5SLlZ1BYNkN5cj8H0?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: cebc3b88-6e8a-4146-ecce-08d98e98338e X-MS-Exchange-CrossTenant-AuthSource: VI1PR04MB5136.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Oct 2021 22:24:20.2672 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: n5CfpsIOOSk5jw3JHI6T/hrEPYEfLHrAGsKJ/8Cs8s0JAv/Ycz7o4fu0nM0vX6y662lxp39OXoHK3ea08mTLAA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB4816 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org In the new behavior, the sja1105 driver expects there to be explicit RGMII delays present on the fixed-link ports, otherwise it will complain that it falls back to legacy behavior, which is to apply RGMII delays incorrectly derived from the phy-mode string. In this case, the legacy behavior of the driver is to not apply delays in any direction (mostly because the SJA1105T can't do that, so this board uses PCB traces). To preserve that but also silence the driver, use explicit delays of 0 ns. The delay information from the phy-mode is ignored by new kernels (it's still RGMII as long as it's "rgmii*" something), and the explicit {rx,tx}-internal-delay-ps properties are ignored by old kernels, so the change works both ways. Signed-off-by: Vladimir Oltean --- arch/arm/boot/dts/ls1021a-tsn.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/ls1021a-tsn.dts b/arch/arm/boot/dts/ls1021a-tsn.dts index 9d8f0c2a8aba..517286073451 100644 --- a/arch/arm/boot/dts/ls1021a-tsn.dts +++ b/arch/arm/boot/dts/ls1021a-tsn.dts @@ -90,6 +90,8 @@ port@4 { /* Internal port connected to eth2 */ ethernet = <&enet2>; phy-mode = "rgmii"; + rx-internal-delay-ps = <0>; + tx-internal-delay-ps = <0>; reg = <4>; fixed-link { -- 2.25.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6443AC433F5 for ; Wed, 13 Oct 2021 22:28:15 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 24DD161151 for ; 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Miller" , Jakub Kicinski , netdev@vger.kernel.org Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Rob Herring , Shawn Guo , Andrew Lunn , Heiner Kallweit , Russell King , Vivien Didelot , Vladimir Oltean , Florian Fainelli , Prasanna Vengateshan , Ansuel Smith , =?UTF-8?q?Alvin=20=C5=A0ipraga?= Subject: [PATCH net-next 2/6] ARM: dts: ls1021a-tsn: update RGMII delays for sja1105 switch Date: Thu, 14 Oct 2021 01:23:09 +0300 Message-Id: <20211013222313.3767605-3-vladimir.oltean@nxp.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211013222313.3767605-1-vladimir.oltean@nxp.com> References: <20211013222313.3767605-1-vladimir.oltean@nxp.com> X-ClientProxiedBy: AM3PR05CA0154.eurprd05.prod.outlook.com (2603:10a6:207:3::32) To VI1PR04MB5136.eurprd04.prod.outlook.com (2603:10a6:803:55::19) MIME-Version: 1.0 Received: from localhost.localdomain (188.26.53.217) by AM3PR05CA0154.eurprd05.prod.outlook.com (2603:10a6:207:3::32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4608.16 via Frontend Transport; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org In the new behavior, the sja1105 driver expects there to be explicit RGMII delays present on the fixed-link ports, otherwise it will complain that it falls back to legacy behavior, which is to apply RGMII delays incorrectly derived from the phy-mode string. In this case, the legacy behavior of the driver is to not apply delays in any direction (mostly because the SJA1105T can't do that, so this board uses PCB traces). To preserve that but also silence the driver, use explicit delays of 0 ns. The delay information from the phy-mode is ignored by new kernels (it's still RGMII as long as it's "rgmii*" something), and the explicit {rx,tx}-internal-delay-ps properties are ignored by old kernels, so the change works both ways. Signed-off-by: Vladimir Oltean --- arch/arm/boot/dts/ls1021a-tsn.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/boot/dts/ls1021a-tsn.dts b/arch/arm/boot/dts/ls1021a-tsn.dts index 9d8f0c2a8aba..517286073451 100644 --- a/arch/arm/boot/dts/ls1021a-tsn.dts +++ b/arch/arm/boot/dts/ls1021a-tsn.dts @@ -90,6 +90,8 @@ port@4 { /* Internal port connected to eth2 */ ethernet = <&enet2>; phy-mode = "rgmii"; + rx-internal-delay-ps = <0>; + tx-internal-delay-ps = <0>; reg = <4>; fixed-link { -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel