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 94056109C059 for ; Wed, 25 Mar 2026 18:59:07 +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=FH7VG5C/81eXq34g0QngkLWpzL4yNonIikIG/WFLLgk=; b=2zN8IrHv9PcAcBBjvtHEICyQcw q095FTO7gGxXseGou/sIwV4mi5duBJ+IXrCEubxY7gpzLp/bFx38ovW4VTnog/kigiJgsZ5ufV/Vb Et7oWGMuEhMWQbrGwsGPVDpoUfLX2AIzmVuRr/UqrlmZPMvuL7UKYzBq4caECOMrBfUhMX5V0OybF EBQA49KM93sJ6GFB1gELgVCF+jun8HlIVYqJhIIzv3+WYGvmLcNzc8A7Q4wzThQ9u3xddcSbZu9H3 ZfE5Z7fzLmTZGDf9ZJ4G7TjTMgBtyxNJEh4HCq3iqlN01JCIEscGMR6ymYoA5V6hrhUJdaXdManpB ju4elREg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w5TRU-000000047CC-3QrH; Wed, 25 Mar 2026 18:59:00 +0000 Received: from mail-northeuropeazon11011004.outbound.protection.outlook.com ([52.101.65.4] helo=DU2PR03CU002.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w5TRO-000000047Aw-2ur2 for linux-arm-kernel@lists.infradead.org; Wed, 25 Mar 2026 18:58:55 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=ieRbIrPzSnZaJc+JoQYvhTP1teiUWhXjpZ5/tSkXszU6q8d94hImKorhk4UTyFutuNVU5pkf9U6egY9++cwCwrMzHa3H//egfbfVbAgMgQxBC8Z4kCCZm7zPCwygHNEj36KjnkeCKX+mqcnr9iKJ2hrhRYtxuuDD9thrdJH8C3AzCTi1vcyFUwXtlETmxqUtshvbJCtmfwprGnf6vBEtE7ltJIY7oMgNAF7ngkYL4LTlYjiPXSPO0ayNkY7qW/xftnL74nEGsvKMyuwPKehqH/G9555zwjMXdLco7YHZrVlqG/wAiMIQjfCoSpIB6V8SeuAOx3/m0YzObRQ+1Ux6Jw== 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=FH7VG5C/81eXq34g0QngkLWpzL4yNonIikIG/WFLLgk=; b=xgDEp4iKHZ8fMVR+DRHLpxmVdVGC9dBFQg9HlHNFpf677B9Di2DP1Db4B9O1Ox+Hcv+9JQ7c7R32us3iPFlyQRnaJ08HVUfPlPbc0nZUVzqomU1UCitaZbcWAnuT/wAFXABMDxn3Yb5mOdDVYbLRy51DxTQ4NxSZzOHNJgZD4ECrG91piFLpqaI4ZofV43AQiIu40qKRj0QUxcoWYc3tPkl0dR/ygS7QtuLmLliLmdjTXhj/VdzKNriQf6jX+l0v3oJssZJdmohNqKTllUSLe75q1i/dv9BYCOkkarmDqMoWQc0speKBZFpjRCrqtzmeNxatcfI55fXzKnfd9QLP0g== 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=FH7VG5C/81eXq34g0QngkLWpzL4yNonIikIG/WFLLgk=; b=ApHAwOupfHSBiiEo1FHVm5pFXwm0dxpHz8RLkjg+k6uNVZCvRo4N+07YjbrU9+a1BKxq+IJUBec4hrUJ2gAGixpXfu6lqmmtySPWUYYufwW17nYUqEuDInkWpDi4CE74LGCEco1hVW0VY4FK7418OdzrKqjZMrWy85dNZ032461OFrnM9G0PS8jFE1HvlEgY0xilsqokjuUY8Gl0jJ7T2bV8Tqec82bj2L7xSvItBuX7ftvJIww6sCzVR3JwFZYoT8vQFRHg86pFQQzw7ZObI1OVeyMCArC4q4QN1bdzjylta5zTifuepdP9GOYPNoLXNySxLDvaKKKFYA5bPUQXSw== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from DU0PR04MB9372.eurprd04.prod.outlook.com (2603:10a6:10:35b::7) by PA4PR04MB7997.eurprd04.prod.outlook.com (2603:10a6:102:c9::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9723.19; Wed, 25 Mar 2026 18:58:48 +0000 Received: from DU0PR04MB9372.eurprd04.prod.outlook.com ([fe80::4f6:1e57:c3b9:62b4]) by DU0PR04MB9372.eurprd04.prod.outlook.com ([fe80::4f6:1e57:c3b9:62b4%4]) with mapi id 15.20.9745.019; Wed, 25 Mar 2026 18:58:48 +0000 Date: Wed, 25 Mar 2026 14:58:41 -0400 From: Frank Li To: Francesco Dolcini Cc: Franz Schnyder , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Franz Schnyder , devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 3/3] arm64: dts: freescale: imx95-toradex-smarc: Use gpio-hog for WIFI_UART_EN Message-ID: References: <20260325-mainline-update-imx95-v1-0-b5ebe976655b@toradex.com> <20260325115513.707914-1-fra.schnyder@gmail.com> <20260325181057.GB2972@francesco-nb> Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260325181057.GB2972@francesco-nb> X-ClientProxiedBy: PH7P220CA0036.NAMP220.PROD.OUTLOOK.COM (2603:10b6:510:32b::35) To DU0PR04MB9372.eurprd04.prod.outlook.com (2603:10a6:10:35b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DU0PR04MB9372:EE_|PA4PR04MB7997:EE_ X-MS-Office365-Filtering-Correlation-Id: bfade74f-f632-4536-6097-08de8aa08c28 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|19092799006|7416014|376014|1800799024|52116014|366016|38350700014|56012099003|22082099003|18002099003; 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:DU0PR04MB9372.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(19092799006)(7416014)(376014)(1800799024)(52116014)(366016)(38350700014)(56012099003)(22082099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?ZR+dUFO7GsTkEoYvMtqiPwsIU4i+FyQyv8qfHxIk6jjUQsJ7cCUDh3D8t9Ou?= =?us-ascii?Q?BWjDCgi0oyVIK1/fGrUUlaEfuCcK/U+zJxxAVjnMAf3o7UgMahTo/AzTl5oi?= =?us-ascii?Q?Sco/NLDTven1EvDwZK/ilf4N7LHNBxf7adi52cYF1NbHxIt+8wR+ZWBTxnfe?= =?us-ascii?Q?OyyCZg3UVC9LBT60iqyabbfk9W0OOnBBv1QnxZQUciLvmdTPnc2Sbt8XgFpz?= =?us-ascii?Q?DXsCp1JwGQ809hpUs3gF1hmV7QGrYNbF+D6tAx+Y9PUJ+ILIxw/pJtgqd32O?= =?us-ascii?Q?azzktLpIe0VENAlu7tqU1nu4cUSWTaZ8we7bLxEL2ZPecoDPtCyki4Q+DJ5j?= =?us-ascii?Q?c893n9w+xEDOJE3dyRioNTiVXeVuzW9ccT8Y8rvMkkt0CsqMS+a654d0WQ6t?= =?us-ascii?Q?aXJhtiPspueRazQgUD5UI+Rv9D01QPaRWZiuhGQRNP5UqfsVzdShQMOIZcq4?= =?us-ascii?Q?4NVuAoeY8MWuPSYa4bjtoJetEjSDNWZlqIaRU+MusEEWkHg1mP2X28c8LrTa?= =?us-ascii?Q?sAbOYa6rHfe5dl8nNZFP0Ye1hPJhMWMFZqxEiPIxnW38ALWrTI7exR6zscNz?= =?us-ascii?Q?X2uqMuqE+YrbXsosjjRDiI5KDKELJDrzXYVx1hA6VRMyzIPzxxA9ZFmoe7Mv?= =?us-ascii?Q?rGXZt7HTljvZFduJso4r2SAaoJXb9/ky59RMCvd61RyAK3ZNj08uUt8u/1M7?= =?us-ascii?Q?URlqhiKtipcvHpr0bZuyUJrqbHL/h6cPx+6eOalOUJPQXDT6V32J3TxEx/Mx?= =?us-ascii?Q?a9EeDLChyQRK1ly171jdqNTky1kgB0EobiOzMdqSTEyhdpqdxs8muiSCK0E2?= =?us-ascii?Q?yKBPt2Lhr94g+1MdsZS00D1RUnooYBAA61f3E/G4cUCM+Zx6qKZ2jS/t+A4Q?= =?us-ascii?Q?lXlWqsjgD3zhUBlVKd/GOIRpt0VoD9Oxx/pgrxzdYdOjgjO24H+7+48UJjt8?= =?us-ascii?Q?GCFaxumuk5S9eWaVv56XtTvY8yBq8g/KKRHpYYhi4rp/ssM0YM4gPhfGZUv7?= =?us-ascii?Q?oq3R0F7rZOkUNB+u6m9Z3O6MxFkYtPHD3+vcdHoRfHMIpmzuduPehmdfL4Lt?= =?us-ascii?Q?EnDWBE2BPeeTB7xTvxr2veSTzW1UaJkrC4vPtCd4kZ3OKe1pAELuvbXgoMAk?= =?us-ascii?Q?o6K6bndjihg6dRdq3o2QaGLCNWJsELJDsprb+7yYj8BHPGG3lepdeelsFGqU?= =?us-ascii?Q?Jsz05S0owZoKmXGQJ/qkLGqYVDE7er8J77QVZrW1f5Pq29vXfaq2KbJybOnV?= =?us-ascii?Q?GgHwc1Gdy+ZxedhLQmNb83iOj/so0I1XIKNr1z+QUNRXq/J4rBJ/nHIQo3Mj?= =?us-ascii?Q?y5aR3Mxez1RyQD7EX4uWuVnrJppqgIMrFjf2GDFHOUZPn5o8OoMmCPy9+TmZ?= =?us-ascii?Q?6c62W+0PgF6BaF7d6CiPq9YxSSXweeYVs8q0sUAhGBsszLqFItDDKUHgXR9q?= =?us-ascii?Q?08SO21d7qvIJCSKTMJnCo09Y7SRhfbNObWnm7fgxQ4nML3WXlo9fmdciWfH6?= =?us-ascii?Q?GcUTLeWXU5bktl0QjHygh0O2j6k2VhSF3tG9VCMEP+YRTzj/WHuAwmcqML/O?= =?us-ascii?Q?WsV3QYZGseguyyZ/nm3l9gRu6o0803oaix/CSD5kKrJ63R2Az3XSyD4MJuE4?= =?us-ascii?Q?tlx444ZcetgRtzlxTdb4C6Z3PYdqnPt4PlG47INramOLnxRhRea4xzTLzIyd?= =?us-ascii?Q?lABZs4CwbPYoHYvVI1q9ijm+m7FfpPrVHxGeCq3mnNH3gp8i?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: bfade74f-f632-4536-6097-08de8aa08c28 X-MS-Exchange-CrossTenant-AuthSource: DU0PR04MB9372.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 25 Mar 2026 18:58:48.5702 (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: LTNzcjxmSx6JywX2ylKlY1OVvpWGll9NlQagXdJ/7N+zK5WFXeq/cbCuPNyxdqAHGKtCFTqr0GBW9AgMXzZLfg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PA4PR04MB7997 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260325_115854_775122_1760F4DB X-CRM114-Status: GOOD ( 22.45 ) 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, Mar 25, 2026 at 07:10:57PM +0100, Francesco Dolcini wrote: > On Wed, Mar 25, 2026 at 10:54:46AM -0400, Frank Li wrote: > > On Wed, Mar 25, 2026 at 12:55:11PM +0100, Franz Schnyder wrote: > > > From: Franz Schnyder > > > > > > On the Toradex SMARC iMX95, the WiFi UART signals are shared with the > > > JTAG. The WIFI_UART_EN signal is used to select between these > > > two functions. > > > > > > Configure the signal as gpio-hog and drive it high to select the UART > > > function by default. Add a label to override the hog in derived > > > device trees. > > > > gpio hog have problem about probe order, are you sure gpio device probe > > before pcie? > > This is not about PCIe, we are talking about UART here. Specifically the > module is a combo Wi-Fi/BT device, with Wi-Fi over SDIO, and BT over > UART from NXP. > > In any case, this DT is going to be used also by the boot firmware that will > configure the GPIO hog way before the Linux driver probes. Commit message need show it is safe. Frank > > The DT files from the Linux kernel are used also by other projects. > > > I have not seen any place refer to wifi_uart_en. > > There is none (as of now). This is there to make it easier for a user > that needs access to debug to adjust this node enabling the JTAG > functionality. > > Francesco >