From nobody Sun Feb 8 09:11:14 2026 Received: from CY7PR03CU001.outbound.protection.outlook.com (mail-westcentralusazon11010030.outbound.protection.outlook.com [40.93.198.30]) (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 077331607A4; Tue, 30 Dec 2025 21:24:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.93.198.30 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767129902; cv=fail; b=Lb3/rS7E5uatu03O1UPGnoWiKkfD5kpEcUmxQDGYrWCNQtiqcHdp2C1FByMO4Kbulh9edSXldsFMH2cshrLp/TtQN2YRDKayknARhEWpvL/j82M/RherqrqBPs3lpL7gBrqtOsK09xDL4kjAIf2SlSvwMtPcx9VeVhVS3LZjoNI= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767129902; c=relaxed/simple; bh=XHlPK8WRBqYDlpismKCIPR6URDu0V7sS2Yo6akefQb8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-ID:To:CC; b=M12NbvWJTGsusSZ/DjABN28jDoDfdVF4M/rGdqaaaLM8j1GL8JDL+0d54ZfI2z0cmMsUx16aCpiwg6v8acNzFSHZhOWHQ7jOJHlQ/bcUGTQ7CKv/kvEPT4xKUEeGuGwu7BloM3s5vj7Q/rpmcnD5GhspbR/FDPZwW1H43rODXZI= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com; spf=pass smtp.mailfrom=ti.com; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b=jm3m8lVS; arc=fail smtp.client-ip=40.93.198.30 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=ti.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=ti.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="jm3m8lVS" ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=jDWLl/EHRZPJ0BSQ+AiIy3G7by39cU6F9GddqiS0I9/WEqnZUEEYGul4zM5SZTeo2aeHDPyEBxO7Aq6HX++zrLH+vyCm55Z2JggtehdGP8VWej71+qL8ASqtRXLCXyCgzIdE4sNE+9D3YXrQ5kZt9fN6Jp0atUnPWLBGLIE32QwerLbr21WY63/Qtc+vy4F6iR3iOc6ryGKS+pKj8lwHesvhV6TWrmnZ2hZthAWH8Zi8oyHWqjPRrCMl/ei5KeRWNGrgc4EN1UF6+TlGsVmyLJyRn1Wf3vkdmNyIkwN09DI3FP7Wlfi/AadtEQZEsOQwC4b6KxuFjktVgCH1TKd2Xw== 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=4aIoVth3m+DGfATvk+FoGlpKStRliMHLMNW7YCLxY8g=; b=ulZoV37DUomdzbjFVBbHgk2/xZrWwbjIYV5YOWD9fZzgUJh7umlPP6kEqAxWoagcf0Np8LRaer6Z0WaA64+YHZBFsHHG4TIQcRC/lFeAfhG60zOw9vgNwxVFAaGSU5x64x4TdrufKgNdZo0mOoTMh/4A6FqISUQJeJEMfXXQXNojjclqUNKUD2KQkBrtaWd1qGdK1+b8uAsytiDmCINlGc1691OrRz9dsiOFf1TrTLmfMwLYA2sdqjs609Qcjsr/BzCWeX8cfL6FCk+/EYnNgT7kvkKcYSP6SywO2VIFo3ufs0m7Fn3PAlspXE0IS6krwJtEdfaXL2vtxGkKgjsG9Q== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 198.47.21.194) smtp.rcpttodomain=linuxfoundation.org smtp.mailfrom=ti.com; dmarc=pass (p=quarantine sp=none pct=100) action=none header.from=ti.com; dkim=none (message not signed); arc=none (0) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=4aIoVth3m+DGfATvk+FoGlpKStRliMHLMNW7YCLxY8g=; b=jm3m8lVSK1ReAn33tpcdpQ/GqNMP+TdScsMV72YFc+QSiVNEOe1RtqPXJjVdvgezxJ74U1M905BRAscrW3UHnRWLHL7Y5PHuUWofupsPexxumwFT16IQcDqcf1dJNMYQB+IxuaXnNdyoDpFDPcdQ50z7qb1ADjEnF4vKMDbx+5I= Received: from DS7PR05CA0073.namprd05.prod.outlook.com (2603:10b6:8:57::27) by DM4PR10MB6909.namprd10.prod.outlook.com (2603:10b6:8:103::9) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9456.14; Tue, 30 Dec 2025 21:24:57 +0000 Received: from CY4PEPF0000EE36.namprd05.prod.outlook.com (2603:10b6:8:57:cafe::9a) by DS7PR05CA0073.outlook.office365.com (2603:10b6:8:57::27) with Microsoft SMTP Server (version=TLS1_3, cipher=TLS_AES_256_GCM_SHA384) id 15.20.9478.4 via Frontend Transport; Tue, 30 Dec 2025 21:24:55 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 198.47.21.194) smtp.mailfrom=ti.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=ti.com; Received-SPF: Pass (protection.outlook.com: domain of ti.com designates 198.47.21.194 as permitted sender) receiver=protection.outlook.com; client-ip=198.47.21.194; helo=flwvzet200.ext.ti.com; pr=C Received: from flwvzet200.ext.ti.com (198.47.21.194) by CY4PEPF0000EE36.mail.protection.outlook.com (10.167.242.42) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9478.4 via Frontend Transport; Tue, 30 Dec 2025 21:24:55 +0000 Received: from DFLE204.ent.ti.com (10.64.6.62) by flwvzet200.ext.ti.com (10.248.192.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Tue, 30 Dec 2025 15:24:54 -0600 Received: from DFLE210.ent.ti.com (10.64.6.68) by DFLE204.ent.ti.com (10.64.6.62) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Tue, 30 Dec 2025 15:24:53 -0600 Received: from lelvem-mr05.itg.ti.com (10.180.75.9) by DFLE210.ent.ti.com (10.64.6.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20 via Frontend Transport; Tue, 30 Dec 2025 15:24:53 -0600 Received: from [127.0.1.1] (uda0506412.dhcp.ti.com [128.247.81.19]) by lelvem-mr05.itg.ti.com (8.18.1/8.18.1) with ESMTP id 5BULOrp71383806; Tue, 30 Dec 2025 15:24:53 -0600 From: Kendall Willis Date: Tue, 30 Dec 2025 15:24:51 -0600 Subject: [PATCH] serial: 8250: omap: set out-of-band wakeup if wakeup pinctrl exists Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-ID: <20251230-uart-wakeup-v1-1-13f1bb905f14@ti.com> X-B4-Tracking: v=1; b=H4sIACJDVGkC/6tWKk4tykwtVrJSqFYqSi3LLM7MzwNyDHUUlJIzE vPSU3UzU4B8JSMDI1NDI2MD3dLEohLd8sTs1NICXQODtMTUxGTzZEtLEyWgjoKi1LTMCrBp0bG 1tQCNVjxVXQAAAA== X-Change-ID: 20251230-uart-wakeup-00faeac7c994 To: Greg Kroah-Hartman , Jiri Slaby CC: , , , , , , , , , Kendall Willis X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1767129893; l=2259; i=k-willis@ti.com; s=20251230; h=from:subject:message-id; bh=XHlPK8WRBqYDlpismKCIPR6URDu0V7sS2Yo6akefQb8=; b=PF+0VFPgi9JAoUmBGnzRqX7kiOcDwUbYj/CMhklnNZY7KbqWtQxTgWtE+8jAFD5oHkbYht7/L vJ9buqx/zedBkd9bzoaHlIRoBeop7f3aMtN2LiZJLSg3W9Yi+/sylpm X-Developer-Key: i=k-willis@ti.com; a=ed25519; pk=fQiPVFwmogfDAKdaAKq163RWSfgHZVE/MrsDzp0Xo1k= X-C2ProcessedOrg: 333ef613-75bf-4e12-a4b1-8e3623f5dcea X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000EE36:EE_|DM4PR10MB6909:EE_ X-MS-Office365-Filtering-Correlation-Id: 5ef368e0-b78f-4021-c1eb-08de47e9e0cd X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|36860700013|376014; X-Microsoft-Antispam-Message-Info: =?utf-8?B?Nms2YllvVHV2M1NKREQwWHlWMlVueDNTR2JZSnBXeGswN1JxWG91clNoZGZ2?= =?utf-8?B?T1NOR01QeC9Fdi9IbDhtVDlwdlV4SGdFeU1SQXZTb2FXUXozWU9BV1ltSWpl?= =?utf-8?B?eUNHbkRZbUtUbDNyeHBZYUtZejllb2F1Y2NPODNwYkFBeEhRQVpRcC92SVF0?= =?utf-8?B?T3BSRFViUE9FRHBkZExyL3RoUXVzZE4xWGdBRkRvNDhaUCtCekxOWG1DdWxi?= =?utf-8?B?UXMyUWg3WWpRWDdjK3RUQldqUjFhQS81Z0hNWW5xbzlnTGdvK0Q0bCtTV1cy?= =?utf-8?B?RzQvdGdka0xFRzRnZkdyQnEwVjVNYkFiYkp3MUNXbmFQclZkYWRZempXZWNY?= =?utf-8?B?bTkrZW1jTlFpNG1TNzdWNk9IOXhzeTA0elp5c2x0cjRPSnZocWN1NnpSMk5C?= =?utf-8?B?ME1SQTc1dVZvM2x0d05PZElRM0cyYzFGZVlCeXJOY1hSMC9zNDhZanB6U2xa?= =?utf-8?B?QXVQaHp3dHd1MlFCNUpUY1ZtbVUxdC9EL1RSTXNjeks3eThEYlYwTThDTEhC?= =?utf-8?B?VjFlOEVpSWxMeUtvSkM5djZkRWc1ZnZGMVNQOUtkcXBCc3lRUDR1NzF0cjM4?= =?utf-8?B?V1lwL2R0U01rU0lmRmtWMXduZW9rUy84b0ZqOHNhMG91MktFVlJ5RlBIYWFh?= =?utf-8?B?M2JxN3JScmFqSmdpbENjUkJOVXpCaDdqbTVYd29HaEhHZE9MUU1GdVNpTXNZ?= =?utf-8?B?M1ZPNytCWTBtR0hsSEpiRHZ0aGZibklaR0IyMlJZU3kzNUI4eW9nRXRNd2J1?= =?utf-8?B?NHFqeGRsTEtQekhxYXhRYUlFK1k2NVpFV0REUGNHcTI1Vk9VVW9lM0RqTGVz?= =?utf-8?B?cWx5b2Q2MGtmSFV3SUQ4MmJ1UzdlSUtFUzhZdDhxWlpVWGplMlNwSjQ0ZXNh?= =?utf-8?B?eWJIV0lCUk1NbDFPZmFlK1FzcWdBc2NTejNNejR5TFI4Z0hnM24vZk1YSEh4?= =?utf-8?B?NnZ3UXMvdGdQcGlObGlDV3U5ZXZRQUp3YU1xWDNaVEtubWRLUjVpNjFZTW9Y?= =?utf-8?B?WDBJRzc2bXJMdmtwLzFPWGQ5aDBPdEdKV3BNRG4vblZ5alphVnQyQ29oUGgz?= =?utf-8?B?NXUzUTRIcjNXUyszeTJqMnhWd0lYaFVYbEg5TkdMS0NLTkFDOWI0aVpFeHhz?= =?utf-8?B?WDgwd0F6R1l3eXFqRXVDK1lPRUVVbHM1RlJHNURTY2RSTVFiV3ZFWXdMVkdk?= =?utf-8?B?aDhsV0l2TEJQRUxBRjJYVzhPUWlpODdhRmhxNUsrREpPN2ZCMmhHcVU1d1kx?= =?utf-8?B?d2wyVE10Rit0QXJXTVVXOGVid1ZaN2dlajFMckRoWW13SEZDSjhWMDRwOXI4?= =?utf-8?B?YUpDMisxUVRma2dDSWkyUEZOTkJQU1VBZTlmNkVzUVhtblFKbXBvSW1xQzZZ?= =?utf-8?B?L29pZ1I0V2RWdXhEVUs4SnVxOGNuSzl1UU1QaGkzejNNb21OZDJSUk1NVSs0?= =?utf-8?B?MXRIclJDTWFMZE1EckJTN2gycHhTdUVUOGlmbFlFU3MrdWFxRXFDK0dHblFy?= =?utf-8?B?ZUJnanA2RDQwemxpMGZpaFBXb1JoNjNVUDhMc1FiR0lETU9NQWIwQ1FVYmZF?= =?utf-8?B?bitJcW5VeXJvemNoVFMvdWJaeWtwQXkwOHpVanFkUk93NFJ6ZXlmTXpPS1Jq?= =?utf-8?B?Qkh5aExPZnB1aGIxaDRuVFlOeHhpTkFzZmtDbTBiQWU5Zjd4REYvNWRLSFdv?= =?utf-8?B?UXdMbHB6L2lHTlhJVGdEMkNhVkpNd21WVUwwVVpER1JYaW5rd2VhbXErUFJy?= =?utf-8?B?c213eFJEVnJaL2hmS2t6c09VamtMSmhOVndGTlUrZTJxRGJaemhxVFJEQm40?= =?utf-8?B?VVNmYkU0VnBvRjRRUXQrclZ4dDdEQWVoNGVYd044M3BIKy9CNlZpTm9rd1da?= =?utf-8?B?VEZRb1BsY21OYkJNMWZ1TjhJbHY0ZFVWTEJEakwzMkpjVzRQb0lDRHhZSmRP?= =?utf-8?B?dVZ0KzZrTi9ZOUFYaUluR3psR0wvaG83OGZyL1U2aWpiMzlBUmJCYTBhU2pk?= =?utf-8?B?cUlwZW1lekUrZTJIWDZ5MXRwR0g5Z1dibXVaMzU5SVc1aGVvUFNxRjgzYjNC?= =?utf-8?B?eGJPaDBhTUhNWnloVXVYZXptTlAzSjhkekNqLytndThTWEhYa3A4VXcrVklq?= =?utf-8?Q?1BD0=3D?= X-Forefront-Antispam-Report: CIP:198.47.21.194;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:flwvzet200.ext.ti.com;PTR:ErrorRetry;CAT:NONE;SFS:(13230040)(82310400026)(1800799024)(36860700013)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 30 Dec 2025 21:24:55.7409 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 5ef368e0-b78f-4021-c1eb-08de47e9e0cd X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.194];Helo=[flwvzet200.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EE36.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR10MB6909 In TI K3 SoCs, I/O daisy chaining is used to allow wakeup from UART when the UART controller is off. Set UART device as wakeup capable using out-of-band wakeup if the 'wakeup' pinctrl state exists and the device may wakeup. Signed-off-by: Kendall Willis Reviewed-by: Dhruva Gole --- Implementation -------------- This patch is intended to be implemented along with the following series. This patch has no dependencies on any of the other series: 1. "pmdomain: ti_sci: handle wakeup constraint for out-of-band wakeup": Skips setting constraints for wakeup sources that have out-of-band wakeup capability. https://github.com/kwillis01/linux/commits/v6.19/uart-daisy-chain/pmdoma= in 2. "serial: 8250: omap: set out-of-band wakeup if wakeup pinctrl exists" (this patch): Implements out-of-band wakeup from the UARTs for TI K3 SoCs https://github.com/kwillis01/linux/tree/v6.19/uart-daisy-chain/uart-wake= up 3. "arm64: dts: ti: k3-am62: Support Main UART wakeup": Implements the functionality to wakeup the system from the Main UART https://github.com/kwillis01/linux/tree/b4/uart-daisy-chain-dts Testing ------- Tested on a AM62P SK EVM board with all series and dependencies implemented. Suspend/resume verified with the Main UART wakeup source by entering a keypress on the console. This github branch has all the necessary patches to test the series using v6.19-rc1: https://github.com/kwillis01/linux/tree/v6.19/uart-daisy-chain/all --- drivers/tty/serial/8250/8250_omap.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/= 8250_omap.c index 9e49ef48b851bf6cd3b04a77a4d0d7b4e064dc5f..6a5722b722650c1710e79fb76fc= 1a01cdeccc68f 100644 --- a/drivers/tty/serial/8250/8250_omap.c +++ b/drivers/tty/serial/8250/8250_omap.c @@ -1363,6 +1363,8 @@ static int omap8250_select_wakeup_pinctrl(struct devi= ce *dev, if (!device_may_wakeup(dev)) return 0; =20 + device_set_out_band_wakeup(dev); + return pinctrl_select_state(priv->pinctrl, priv->pinctrl_wakeup); } =20 --- base-commit: f8f9c1f4d0c7a64600e2ca312dec824a0bc2f1da change-id: 20251230-uart-wakeup-00faeac7c994 Best regards, --=20 Kendall Willis