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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id C1DCACCFA02 for ; Fri, 31 Oct 2025 19:37:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:MIME-Version:In-Reply-To: Content-Type:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=KH9p+ps3uRZhnrqEycMAR9thv5rIrYSkKhdezrqQaYM=; b=AZqk8DVBklCH5OK76tigX0hCOi FVp/5vsnF+tmDigCSzFufnGhtGveH+/ao1TV3GV8aY91AUcVy0VRqBk8jpEhdjTROTWYD6A9Idpvk NOMuV8I5fTE0NMYjgusp+FyHjpO7Ucqla62Hg1LZRo5DoY7Bc03MG5hF4CZNB9bgUGwetVDDpqAAY k3YeVeG+adQlU33Gbvmk0MAHE7Uea4l9u/xsUs9WNAQI79hEuck7/5FVDJL2S25Kj28oad29w5Me/ gR78sSIbnbdDPKGKLKPjuNkDTTuIFGI34n4hB746403SSYn594RK2mYu3x0CjOYutBBESIDtIhVzH Lh+B2igw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vEuvz-00000006ihS-4B6Z; Fri, 31 Oct 2025 19:37:16 +0000 Received: from mail-swedencentralazon11013062.outbound.protection.outlook.com ([52.101.83.62] helo=GVXPR05CU001.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vEuvx-00000006ih5-3Wjn for linux-arm-kernel@lists.infradead.org; Fri, 31 Oct 2025 19:37:15 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=vEYVcVvKr8ttDE3QGooA1ZxYnbLBEb2OtU2xbJ+xq8MvdzEgIYYr31qvpl2ZbBIoJJcAnQEkcaWFBP4lMZnoldELYUGdJcQ4Dbhh5/dYUbeoheLbR0txTB1p92pc52xdeJJEcH+C/fgsc/lR4yxyUDdFpnQySsv3HW5Rrq8ot275i2yI1kv2MMEBPdrN6D/Rcl0IqIrp7fj23YfuCSkGGUwTpcbxmLfIKAGeSQyaaNcbyYzv/3ega18EeXXTp42WaU5tUZ4dMhNdoPtZvcxYSWbmKRSNI3K77z435ZE5OznNzMA/kiTWv60xP2vK45w3ZVmaitaSGddBKoAxoa14RA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=KH9p+ps3uRZhnrqEycMAR9thv5rIrYSkKhdezrqQaYM=; b=b0EsdiDkPI+ayIk27VLZ+hnOyytv/Y+DPI+GxxCuU0kRN66svWVp7NF/VUokljvB6fABrIKFFvgwZ5NIF3b8jkQZF2FVZ3NH3pNVd4q7SasTm4jVnl1BlVvoHG+NMClfgYTp6oehFkZ9eLkRFV9P9FWHc/KsWsxQvjSXji8gjPnMVK5NLggKWRM6WVArOCwRtt6MmVNfiac+pf5DH1vizbHqRyNLR8K6XBA0dODev8pGBVKvvT/SvmwD3tAMCOIzbKzbUPedGc0oyiWusp9Bl5KNEToK90pHTFt4jCQgLkDqTtkir7xoU2aFZpU5JXgGYQwk0KT6L7i3pLRbWNklQA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=KH9p+ps3uRZhnrqEycMAR9thv5rIrYSkKhdezrqQaYM=; b=lSYfiRppRXtggFPdnaxhfAjsg+kd5VIob0gAMoiB7W50ty2P57utRp7GzIuWGvef3CdravVjxWaNemPQz8v7re0WsYLqBN6dE1/1g1AgpWxFZX39BCehrp+AE4NMTtRcWz7ZCVbGCNeRnbvuuobTXC63kwbohCoI0CKHOi9Owvkg5+sUU5b92ZK82B+GGw42XYYkdgqWC2gaGB+NVvhwTVPhMGwVOTIC0HeBK/CEyyLrcgowAB/5PrZDXZnBQMLAzWZUgxi3PAJSVs/wfS7vdk4jOKOq7/NzsDnzWpNtfxbPSyHym1LkQiqtYo9tKqdGI16lMjDDriHdH50IG6wfNQ== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from DB9PR04MB9626.eurprd04.prod.outlook.com (2603:10a6:10:309::18) by DBBPR04MB7596.eurprd04.prod.outlook.com (2603:10a6:10:201::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9228.17; Fri, 31 Oct 2025 19:37:10 +0000 Received: from DB9PR04MB9626.eurprd04.prod.outlook.com ([fe80::55ef:fa41:b021:b5dd]) by DB9PR04MB9626.eurprd04.prod.outlook.com ([fe80::55ef:fa41:b021:b5dd%4]) with mapi id 15.20.9275.013; Fri, 31 Oct 2025 19:37:10 +0000 Date: Fri, 31 Oct 2025 15:37:00 -0400 From: Frank Li To: Richard Zhu Cc: l.stach@pengutronix.de, lpieralisi@kernel.org, kwilczynski@kernel.org, mani@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, bhelgaas@google.com, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH v6 01/11] arm64: dts: imx95-15x15-evk: Add supports-clkreq property to PCIe M.2 port Message-ID: References: <20251015030428.2980427-1-hongxing.zhu@nxp.com> <20251015030428.2980427-2-hongxing.zhu@nxp.com> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251015030428.2980427-2-hongxing.zhu@nxp.com> X-ClientProxiedBy: BY5PR20CA0020.namprd20.prod.outlook.com (2603:10b6:a03:1f4::33) To PAXSPRMB0053.eurprd04.prod.outlook.com (2603:10a6:102:23f::21) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DB9PR04MB9626:EE_|DBBPR04MB7596:EE_ X-MS-Office365-Filtering-Correlation-Id: 1dae1086-0d15-4162-cd60-08de18b4e1da X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|376014|52116014|1800799024|366016|19092799006|38350700014; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?iB7kAIBFXUZPpS6OSC3zY1Fk/fuZmbCvJiewv9QQphOfak4oESoOjAdv21Jr?= =?us-ascii?Q?E5B3afMlYBjQGSG28iPNoDcgKmB9QwUk77CSNxZmMmbLcyFkUE4y6oPKe2X5?= =?us-ascii?Q?w2WlkRF8dFsKGo8mt6loGvPKBStP4Msv1DvnwjyB6Wv7OLrJ7T6+Z1XP0ZyT?= =?us-ascii?Q?ViflCRaniAYH/bbf88Hz3t0BqSOUIu06okWsXc51Pls6JKdsLJnsKATKzxxQ?= =?us-ascii?Q?fSYTbl1/qkw42xOu+nDFoptEegoC6a3Pd+GIPhRRcb79FJ12BpGspOkq1doP?= =?us-ascii?Q?LoGwjdPQML6L6zoPS2aXm/zAVXFO3dT37Tm0lj2zMbX1NiLLBg4JmQXR8OJd?= =?us-ascii?Q?Wy11wSZHjEgerPmtOeI7oP+2GeS4aCSxRa5ezRYGDId9JuVXRm+hdnclEhIY?= =?us-ascii?Q?NyeVB8Q/vxWKLQhI670QEAMep5l5DeZIhG3WC4ZnOJjTaE0+nGN+N4SDYk5N?= =?us-ascii?Q?Bkru5GOuqw3+nCWhb4AYoEts39X7Ma1cRW80vsZbXDRS2fcX40Bf3U5Zhw6t?= =?us-ascii?Q?T+ISzfwceAAwZu33utE9jIgqtvKtNEoh+Spvbpt1R0x4uld83RpNK/FCPjvp?= =?us-ascii?Q?+Qr0hkbfeP6tBPh5mUwdKq9iJXxndZD0Wp+A8NIHGik+Gt75B5uUGfdAJ6Os?= =?us-ascii?Q?aLfwhTxYPlQNE+mMia58pd0sZxC7EZZs7Nu31SS7nsbjgUwUI0sLgZbBOl04?= =?us-ascii?Q?dekh78Hp0mRpp0G6OX+RnL4nlax+jjMRFSxoi/CzcG/o7vUAvB53LDMWqeVc?= =?us-ascii?Q?ttT3jQs0XhB/+AsKQYAwTmnFCn9tCCFH0uLpCBqjOtMRWfsG/ma21iPNH7Zi?= =?us-ascii?Q?06xk8OaZc5SzusY7QfQEI070AVUPJVdjZ7BfcK1GpCg3x8FMDyK0y3kVrT4J?= =?us-ascii?Q?aBzlB6F/CZ8zao1Ng1MMWObNZOJUaVRwqe2SZ+7s4bUfHIXcmRfQNEOLSX3c?= =?us-ascii?Q?bCt7VoNpRu/v5vYgqiKih/zYZZI+jFtXFL6PEsmhidmZ1RpwJYvvCKgpIH9j?= =?us-ascii?Q?c+6wiytAs3hFKkzk3fwqAs2z7lRDjI6xddph0hfG9gkIgp57wF1KKLu/6Tdd?= =?us-ascii?Q?GtV4S8+A9448+tQn3+RcmJSuWYx+0N7kwzQRgv20q+tTyiaGAiLsxw8bEchk?= =?us-ascii?Q?mMp5rTAYdchjfFqPTuGA1oT7IlFFzZzJ9nDn9NFiIGoSEO3fRTAeKFiopvrm?= =?us-ascii?Q?FmxNed4S/be+ubsZhun9GlIBh69KqEkeHwIkbImOU2/bPaW7IUo14OE2pk6S?= =?us-ascii?Q?YzAGQbfrzMQJM+oWxQSY1rRfMtU3hPA+5o/aNMrJ+lFf8t1Ekdq9VxWZ8iBW?= =?us-ascii?Q?nnccpr1aO+loY3lcfEFcZ3DdQMNfhTi8Vxu41diENb34H4CSobhlmGw3ZG5v?= =?us-ascii?Q?VMeScHIi1MghtpZH9ycBnuUOciaSx5EnQPMt3yAa9OJShL6+kfemV1E7lO/h?= =?us-ascii?Q?X0tCRLPOAe+gEB5W7THTTLo/W+JRxaTFzc7MUHhXjoHeJiPFzymXX9/OtEYG?= =?us-ascii?Q?H5m8ew3NqnmWpkzXW5usDkL5ozXLRsYeyGEs?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DB9PR04MB9626.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(7416014)(376014)(52116014)(1800799024)(366016)(19092799006)(38350700014);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?p6MZaj3hEZMHTVTO2xxhpnv7til/4xI1jM5Ihk60qy5O1C2fmBZWv9pbOzmO?= =?us-ascii?Q?SO4D/f3TLRzPB+uBbxBZDVLWa2IaJ7xokby4g+irgMALpDX9b/vZ3C/FNGjx?= =?us-ascii?Q?gzQne4gkhTmkTkzvrfVi4I6z50WYBsTAgkrSambhZZTeG5zYKoc7CZjMFbTN?= =?us-ascii?Q?TEb3qv2Hto95yacIqAYarqJphg+0+r/OtBPFC8th045fkhagHaMVIsY/iu5C?= =?us-ascii?Q?Ux3JfnvrBL8FQjkcr6upU633PtjisfZpbwd/ADFDiKVA2aHHQc8LZcosMx4/?= =?us-ascii?Q?5Vpf/OQ2ryPb+4Cn/JMhQCz/Lb3RePpcGU9QfHNa/jowLWovxQVYUn7gbeIc?= =?us-ascii?Q?kv7nxl0iO/q12Eapdki/FvNbhTXUSLjkgkjlpp7AC0iJuOLHUwZomSJFPIMa?= =?us-ascii?Q?F61HyDpWSpem17OPE9RpdkHN1dtwzG3JK1fI7coAXpOyW31t/0gXZ5YevqMO?= =?us-ascii?Q?g1YCzcYmxvVqBaiEl+xEKafltXaOXMmUdkmnKW1fQ5QnaFBd/7tz5IUTR5L3?= =?us-ascii?Q?xixvMAaYgILqnQpIXMIr0s0rpd4PVJKugBXWFBcyxiOKRolnB6b0mUbvjMaq?= =?us-ascii?Q?G5lPdOB8fa4QLj7vJrXkPqucqk0OMmy9BaOBe1aRwIjTcAcn4nglDxHK43KS?= =?us-ascii?Q?qhDSOiADMiQKpnCeM4x/L5NniQHk0iS9CN7Y+HzTo2onr15KZu7dxBt7q+ov?= =?us-ascii?Q?wts3E6gAvjxoma8858w0Z7djVCTKyRNcPGZ2tSZlhr5q1E33cUcmOcghBlCi?= =?us-ascii?Q?vNCdxp/+17G424iRFsMZBrfXr/1L/4liVzqxpHD1enE/vQdpYDMgxvNcx8aY?= =?us-ascii?Q?dfXnS1VLD6FX+u5JARJYeHuK9vBmL8/0D4njRU0UL8j0IL+yoHrt7WuusLkM?= =?us-ascii?Q?EBDxZ0Y45CC8u7dTk5DK6pIJEGCBa+uavvrsWIgAtbsIJlvdSQpXNC6hufue?= =?us-ascii?Q?KJ2z4luenSwU2gF/joTnhYAZsYxRuH5HnU6PqLhcdJVexCGJ/fOpn8TFZ/d+?= =?us-ascii?Q?u4ywIiTe9Vwp4uPgkTHcl3QE37cvtcoV2NoO+BSo0BrzhXBAJ/tlIPsgKOMM?= =?us-ascii?Q?lXo7I8ySZ0oq9q8Pk7a0HkHr2pNoEFeDmRgKvG3Bcfg9K/KnX7WTSzxSKASZ?= =?us-ascii?Q?jFS/5/+wZb0QCrWRkNVnB9V3rcOVT95Gd8faVacHfg+W9aIyxiVRc+tzidzp?= =?us-ascii?Q?oz7cEl6Q0BCw4lrGZFMsTqgPowmQxNsfzCnDANkQGw8Obm2plZol+gnhLYqB?= =?us-ascii?Q?Bc7bKcmaF4Rvg1HGPiZSI1BLEoEnIotu1YBSmujVUvM6lN8kLMgHMDMftLFR?= =?us-ascii?Q?io2IO3PiVTMR3prR4BP9v7GFqnD0ttjPPsU9EdO9/0HDI0oSqlYUM8u/IhQG?= =?us-ascii?Q?hQeSK1ijB41eA+ecYUxbt3CVe7cl4sYPrloZ8S62wWYVhalrQXRJTlMWsoET?= =?us-ascii?Q?76A0oApWNEyKGSFeT/+g4MHM6340VM3kcv6qEB1fyGpjpfhT+aEvVEQJVrGM?= =?us-ascii?Q?MJr0gU9BTh57d8tJAmY2eeivVV5VcTfACSMqdmy/yvpjmbPPd4rZKrZ+vJxJ?= =?us-ascii?Q?WRo4dhMbCoSBCBc7R6CkPomh/3jkX5g6XzSFJYii?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 1dae1086-0d15-4162-cd60-08de18b4e1da X-MS-Exchange-CrossTenant-AuthSource: PAXSPRMB0053.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Oct 2025 19:37:10.1393 (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: 3+EWUtnqceTq0XbSrV9yz4S1Aa/iNfruzPdTFKAQ1EoEGJR31jqw357W/CBjL9VSjbnAuRCxJB42YAFSnhaGLw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DBBPR04MB7596 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251031_123713_902491_54B689A5 X-CRM114-Status: GOOD ( 17.01 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Oct 15, 2025 at 11:04:18AM +0800, Richard Zhu wrote: > According to PCIe r6.1, sec 5.5.1. > > The following rules define how the L1.1 and L1.2 substates are entered: > Both the Upstream and Downstream Ports must monitor the logical state of > the CLKREQ# signal. > > Typical implement is using open drain, which connect RC's clkreq# to > EP's clkreq# together and pull up clkreq#. > > imx95-15x15-evk matches this requirement, so add supports-clkreq to > allow PCIe device enter ASPM L1 Sub-State. > > Signed-off-by: Richard Zhu Reviewed-by: Frank Li > --- > arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts > index 148243470dd4a..3ee032c154fa3 100644 > --- a/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts > +++ b/arch/arm64/boot/dts/freescale/imx95-15x15-evk.dts > @@ -556,6 +556,7 @@ &pcie0 { > pinctrl-names = "default"; > reset-gpio = <&gpio5 13 GPIO_ACTIVE_LOW>; > vpcie-supply = <®_m2_pwr>; > + supports-clkreq; > status = "okay"; > }; > > -- > 2.37.1 >