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 91232C43458 for ; Tue, 30 Jun 2026 10:30:46 +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:Content-Type: Content-Transfer-Encoding:References:In-Reply-To:Message-ID:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=7ZvKlYF7f2F4BWN+C0F9J2WFVy06WAhnj3yU4lfJgvg=; b=d2ama3iiRiEsd/EL8n7XCQqKAN d0obGnRl6Lx3w7fGRf8o2dFP2kEp+9hEPyJNIp3yfHZ6JPNncE3cKRqU/UIkkJbmC5ywOOTqIqOWT MTfktSvSx+hil6JYEE/03qBO1DvGdhs7VIdlLSgYPXlt9kKyZKEMLEE+1m2D4/H6+UFlCjPzMttpH 07ILBn5+9bzGCf2USvVgyOU4cIK5WVbJl32mEC5ustZSHeYLGNKuEoq8qe5/AihPIyb3mt/riSDB+ QlYBD5M/SDLeCJNwnOCF4Zd0VEaPCNT85iC+31mqaehOrKAdf0JlLbYir9t/TOoNh5QasMOAgrWYU UJYj5ZOg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1weVjk-0000000GeJI-0Jw5; Tue, 30 Jun 2026 10:30:40 +0000 Received: from mail-francecentralazon11013024.outbound.protection.outlook.com ([40.107.162.24] helo=PA4PR04CU001.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1weVjh-0000000GeHL-2au9 for linux-arm-kernel@lists.infradead.org; Tue, 30 Jun 2026 10:30:38 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=NheQpuPve+gRfIfH7MsklmzyDGNesHtbTHozhFd6W3fpG2oYxuI94pG8FIFe0b/BtTwiJofSQMrCrnu+AYahtCgqM0nFk1m7JE+P4oqcIjOg65lBOHaFaxPnMXxjriRV0jQC1UHAf9cfqXbweXpFCFbM2EIysVEr4YcdlUnGFvauRZUQZSZCDndOFlN1n0QYWA7wOxYN21iETOFtile1O6p62AMeW63oGX8Tet73aoZQzSnK/VfmiMnYkvH4pRm/xIfDLutq6puSoCkVfKje8dCYlPPdixqVR/5gIutbSfIaL0W8lWPM4xJdmHuV/8b5vB5qNMW3vk3wvK0qGI7vig== 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=7ZvKlYF7f2F4BWN+C0F9J2WFVy06WAhnj3yU4lfJgvg=; b=P53Jv2lMnaat8D/AIGpq7JracDVAGGQmPehqqUs3U882WVL/wjyhH2ZotRjhPq3fbyfbkZpspt8XwoNs6k8RtvPtzgc8WFDmvUZ87D5hPQmFW+PzizABlHPqNYLV0IGOCgxkynydn0qlM/ELRvVArr+hyTBLDZoIf2PukYlvieLgmVkSGiSF4ew6uY9XxkOe9rKIrWsFEZuMuUAzqf8BC+5BkolzUSXFGDKId3BiRiVWg5xS7Un7b+IHWfgrF5z17WW/3wkPBceOenynLmxzAvlWkCuukeuINnDHwXJGjOZxvgnXipfjQOGwoBukAQwyNb81EolZgVWTJxTbvii+JA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oss.nxp.com; dmarc=pass action=none header.from=oss.nxp.com; dkim=pass header.d=oss.nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=NXP1.onmicrosoft.com; s=selector1-NXP1-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=7ZvKlYF7f2F4BWN+C0F9J2WFVy06WAhnj3yU4lfJgvg=; b=NR2Lh2WrsBYE6CPJ9mrP028UrQ4fwpXzkcAjgkoTdpSrYKj+de/AQvCSoAzc+DHnNZ8L9JpkwrwJY1LuZfZVV5HvutMkiEl+l2SBSz1irTFMnUaTGd5vr2Sin0RdHW9GIQThsOnajIvLxFwTAgYnBOJPueqeP6LT/kSXQpNh5+1i4zGJJ3vxEDz/t0u8bw8T3Fejqd9fduvLbGTnpGIUrUgvCMtvg+Y+5q8HF8WCMKn0EeV6uWWh+bWBmrxhudvXd10m0B2GNMw85AN3m87W9ftUHrJfCC6tQlWj/5Z2ksHtUOHJ60yPNfjkNTTbmZlZFiIZDchNMOUqH4Ipt2f/wA== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=oss.nxp.com; Received: from VI2PR04MB11276.eurprd04.prod.outlook.com (2603:10a6:800:296::7) by AS8PR04MB8547.eurprd04.prod.outlook.com (2603:10a6:20b:422::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.159.19; Tue, 30 Jun 2026 10:30:32 +0000 Received: from VI2PR04MB11276.eurprd04.prod.outlook.com ([fe80::60d7:a8e5:eb88:9be]) by VI2PR04MB11276.eurprd04.prod.outlook.com ([fe80::60d7:a8e5:eb88:9be%5]) with mapi id 15.21.0159.018; Tue, 30 Jun 2026 10:30:32 +0000 From: "Sherry Sun (OSS)" To: robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, Frank.Li@nxp.com, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, amitkumar.karwar@nxp.com, neeraj.sanjaykale@nxp.com, marcel@holtmann.org, luiz.dentz@gmail.com, hongxing.zhu@nxp.com, l.stach@pengutronix.de, lpieralisi@kernel.org, kwilczynski@kernel.org, mani@kernel.org, bhelgaas@google.com, brgl@kernel.org Cc: imx@lists.linux.dev, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, linux-pm@vger.kernel.org, sherry.sun@nxp.com Subject: [PATCH V4 2/8] PCI: imx6: Add skip_pwrctrl_off flag support Date: Tue, 30 Jun 2026 18:31:33 +0800 Message-ID: <20260630103139.3823329-3-sherry.sun@oss.nxp.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260630103139.3823329-1-sherry.sun@oss.nxp.com> References: <20260630103139.3823329-1-sherry.sun@oss.nxp.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: SI3PR02CA0014.apcprd02.prod.outlook.com (2603:1096:4:295::6) To VI2PR04MB11276.eurprd04.prod.outlook.com (2603:10a6:800:296::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: VI2PR04MB11276:EE_|AS8PR04MB8547:EE_ X-MS-Office365-Filtering-Correlation-Id: d9ad7082-c72e-4e47-11ad-08ded6929cff X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|376014|7416014|19092799006|23010399003|921020|22082099003|18002099003|56012099006|11063799006; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:VI2PR04MB11276.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(1800799024)(366016)(376014)(7416014)(19092799006)(23010399003)(921020)(22082099003)(18002099003)(56012099006)(11063799006);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?g4BqJFEJgSCymOm6A9ltwW0Ohg9WHpWcIg1GfIOdeCChq71LFabA3xfStqu3?= =?us-ascii?Q?Xv30U25jcAE5S9wKU4GmcRnx+V1ijLmSoR0ZrFM27LuYpcqIe55M/gG4IUKw?= =?us-ascii?Q?UcH77PMMDh2pNkmaMgpRCrTelx7uZ0GbZJEbet0Jk5wfYa8KdQ8o4vftxbUg?= =?us-ascii?Q?qMmsYoK6/ZFp4VVYq37VLC/K2fucU7BuOb5hRKOS530hSOR9YQ64UVq72kXI?= =?us-ascii?Q?LCvNErURW7kxLaTkgSabs3d2U2fnmUwmDI2nrOpfqiprMCFVrQvQ02ey1arl?= =?us-ascii?Q?xrqow4POrXYpyJHwmVE++oVA3cJNWWwk5M6alItRkYRRBNH/SZhDXWLIwTZk?= =?us-ascii?Q?2we6ehVJnHsdxpUnPuV3LSarhqXi6YMXc2LdNJVdkiAItO4UB6PyqwVsfTfI?= =?us-ascii?Q?aJDqp0bpV0182gx+ay7RsHpjoqubOgjDNyL8+LS0JDVnOSISB5itETHj92dE?= =?us-ascii?Q?+HH9hKG4r9sDhLeFwHaktnG0RIJGPgkbAAS0vbzjN2mufS/DNQBwhDdCK1Zi?= =?us-ascii?Q?fOcmNReKbEK8v+ri1MwRZeE5q4N4Yny7bbrZzQt34EaNnzFtLSrY6MO0TKqE?= =?us-ascii?Q?KEbUFYU8C9vt/TtCMRQlLn+aSfFT6U+5L+xsX9qvqVZ54371r0kFM+hxPm5m?= =?us-ascii?Q?qVlxfJkdIhAZn25Wve8P9YXjtbTuGU3ilFRuf8t+HX5LXdWVnDVRUIoNrdpm?= =?us-ascii?Q?+OOyl7VK02tY8eRUkI7Ex4iTF2SoC2s3DkSliWXDBUmsY4u3nNToklNP1y4f?= =?us-ascii?Q?+AAAo6I0iUMxs1NyNK1uULLa/RtMXPoBypOECdQlY0oF3RCwZluBXd3zXPsJ?= =?us-ascii?Q?4zxDTMN6G/QZzrJuzaEWInNa2/kN3wu7x/IJNFJms6MuxMVeVijCnz23EFzM?= =?us-ascii?Q?vG8wRmnndXGN25Qu3n0Rf7iRPKBrLDHgs6/obQJng6S8e7E51HoDMHVdhYmH?= =?us-ascii?Q?QH7llEP/zTNXEmstDh6VN1eTHfrg3eIdg/BcHRkrkZNU8twuVAvt0lCpSzOy?= =?us-ascii?Q?HVAM4j3RHbnuPU8f255WH/+1IqJqfE82Q7wZycvdM0Z59QXHPpuG1A4wHfeF?= =?us-ascii?Q?eYMcDQZx6xK2bbs7m6fg99n+BGC6fmevduyihmjOFZye9Bd0OCYCrdOYnPWR?= =?us-ascii?Q?e47qitEMrkJpAmx/tiTOzCRq1jwu7ecU8tAwZiKnAViXdyyma4RBRY7EaXXx?= =?us-ascii?Q?C/Zw55wMc53M3/x42u3msUw7fnwHW9hqNuMVzOz9VX53smpvV+l3GvhjG2cC?= =?us-ascii?Q?nlW5CNXmUBhg3q7Vs4PjoUYR+Nz4LLHbhsspTZ3dEBYoXPiU/7TCxiO91b1L?= =?us-ascii?Q?zXaGZBOmYB9XykFyPmm8lZTsoXhO+SijvBpC6WuB8q7arHm0ea8zQci7RY5J?= =?us-ascii?Q?8Iu58Yict12P3fOykOz3ayM2xz74Hm5T7yJ2TiiHItyggA6sPQgnP+ql3jJE?= =?us-ascii?Q?ECWQUuhfrYREuluGLJm28CfQpaSfzYfX7g3inG8J0HgYYxT8K5kHKcqk6nx3?= =?us-ascii?Q?/AZpfzcg+QpJjZlIlBy7tnZICz4qi37+R0xX5t3nDI4aFW1GzlI/RaVUgv4T?= =?us-ascii?Q?Y2c4NIzKJHF5QnNOPumc/yLXx/6WI/g0ibsWNQR3TLDIgwg1k+nK5WgjEmvy?= =?us-ascii?Q?cD5ki86aWpYjHau+RKZqPnpkx6idnx0AY7qcPe/ee11wQsbUUKOm3RLml3ZZ?= =?us-ascii?Q?IoCh9jZY96LoqUVNaOmJz9eFsQMYRG4ANVOHsOqF3eN3KywLeIDWeooEuphu?= =?us-ascii?Q?24ym9u5gJVfM/QWg5SJ+dZZn8od1dLiO4UCM5aywqfAV0q4mqleF?= X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: d9ad7082-c72e-4e47-11ad-08ded6929cff X-MS-Exchange-CrossTenant-AuthSource: VI2PR04MB11276.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Jun 2026 10:30:32.4644 (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: UZn3eGiTMdwVpkW/yy8mDEbvl5FwRl6IxzTAKu6Ic4H9FcyAZ7v1r0jUaqmfVJIrhxudixKNA9HI7qMQrAGgPNLcOatXpCUuE+C57vNKoaPqZbepXjnwtDVR0Jb1EGEy X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR04MB8547 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260630_033037_665982_ED920056 X-CRM114-Status: GOOD ( 12.60 ) 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 From: Sherry Sun Use dw_pcie_rp::skip_pwrctrl_off to avoid powering off devices during suspend to preserve wakeup capability of the devices and also not to power on the devices in the init path. This allows controller power-off to be skipped when some devices(e.g. M.2 cards key E without auxiliary power) required to support PCIe L2 link state and wake-up mechanisms. Signed-off-by: Sherry Sun --- drivers/pci/controller/dwc/pci-imx6.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 1b535bb6fd31..0685573fee71 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -1382,10 +1382,12 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp) } } - ret = pci_pwrctrl_power_on_devices(dev); - if (ret) { - dev_err(dev, "failed to power on pwrctrl devices\n"); - goto err_reg_disable; + if (!pp->skip_pwrctrl_off) { + ret = pci_pwrctrl_power_on_devices(dev); + if (ret) { + dev_err(dev, "failed to power on pwrctrl devices\n"); + goto err_reg_disable; + } } ret = imx_pcie_clk_enable(imx_pcie); @@ -1454,7 +1456,8 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp) err_clk_disable: imx_pcie_clk_disable(imx_pcie); err_pwrctrl_power_off: - pci_pwrctrl_power_off_devices(dev); + if (!pp->skip_pwrctrl_off) + pci_pwrctrl_power_off_devices(dev); err_reg_disable: if (imx_pcie->vpcie) regulator_disable(imx_pcie->vpcie); @@ -1473,7 +1476,8 @@ static void imx_pcie_host_exit(struct dw_pcie_rp *pp) } imx_pcie_clk_disable(imx_pcie); - pci_pwrctrl_power_off_devices(pci->dev); + if (!pci->pp.skip_pwrctrl_off) + pci_pwrctrl_power_off_devices(pci->dev); if (imx_pcie->vpcie) regulator_disable(imx_pcie->vpcie); } @@ -1990,11 +1994,14 @@ static int imx_pcie_probe(struct platform_device *pdev) static void imx_pcie_shutdown(struct platform_device *pdev) { struct imx_pcie *imx_pcie = platform_get_drvdata(pdev); + struct dw_pcie *pci = imx_pcie->pci; + struct dw_pcie_rp *pp = &pci->pp; /* bring down link, so bootloader gets clean state in case of reboot */ imx_pcie_assert_core_reset(imx_pcie); imx_pcie_assert_perst(imx_pcie, true); - pci_pwrctrl_power_off_devices(&pdev->dev); + if (!pp->skip_pwrctrl_off) + pci_pwrctrl_power_off_devices(&pdev->dev); pci_pwrctrl_destroy_devices(&pdev->dev); } -- 2.50.1