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dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=nvidia.com; Received-SPF: Pass (protection.outlook.com: domain of nvidia.com designates 216.228.117.160 as permitted sender) receiver=protection.outlook.com; client-ip=216.228.117.160; helo=mail.nvidia.com; pr=C Received: from mail.nvidia.com (216.228.117.160) by SN1PEPF0002529E.mail.protection.outlook.com (10.167.242.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.92.5 via Frontend Transport; Wed, 3 Jun 2026 19:48:16 +0000 Received: from rnnvmail201.nvidia.com (10.129.68.8) by mail.nvidia.com (10.129.200.66) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Wed, 3 Jun 2026 12:47:58 -0700 Received: from nvidia.com (10.126.231.37) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20; Wed, 3 Jun 2026 12:47:55 -0700 From: Jacky Huang To: Danny Kaehn CC: Jacky Huang , Benjamin Tissoires , Andy Shevchenko , Andi Shyti , Conor Dooley , "Jiri Kosina" , Dmitry Torokhov , "Ethan Twardy" , Bartosz Golaszewski , "Leo Huang" , Arun D Patil , Willie Thai , Ting-Kai Chen , , , Subject: Re: [PATCH v14 1/2] HID: cp2112: Add fwnode support Date: Thu, 4 Jun 2026 04:46:53 +0900 Message-ID: <20260603194719.403557-1-jackyhuang@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260520-cp2112-dt-v14-1-b1b4b6734b6f@plexus.com> References: <20260520-cp2112-dt-v14-0-b1b4b6734b6f@plexus.com> <20260520-cp2112-dt-v14-1-b1b4b6734b6f@plexus.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: rnnvmail201.nvidia.com (10.129.68.8) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF0002529E:EE_|SJ2PR12MB8718:EE_ X-MS-Office365-Filtering-Correlation-Id: 6c100ae8-2029-47b2-bfe7-08dec1a90e38 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|30052699003|36860700016|1800799024|7416014|376014|22082099003|18002099003|11063799006|4143699003|56012099006; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 3VGlcGOEaaUNg3iok85faf0NatW4/ZArCXftEUsJE08NmYVKCCEuIaFM5SYUtdMXjFH7+6/9zOl/MiTxjZfsTCVXV9NCH/nLAB0HOF3mtKqwraAYmWqyupWwmIZx8QjhCYw7XQ1X2Vu2fpy1QVCc+CPOVns5Pj2EEVcCis85RvwOkhmg4fHW0AU+VfgjpxoZ4LuLsuwCKkyAPL+MOgf1wRUPM+xTT8LvqA6S+cTbVP2bIag+DxxWTL1qVfDSLi/0dklEtgPx5KJHNiM2/hbXciYogfjao3EduL+TSdvb4X47zR66zyi0OJ7B4iRLDyhVrb1X2TrcT4y/S70w0at/in3ZuxEMLlOUm6Fu+F1UwVmM3OGFS4Rh3adlg4ghjE2OK9RMHXV4pJPuTqZsnvrSeSHHXq5a4mmx5ii1YGt1gENUWVZuoOb3m9Jm+XpyT0lj X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Jun 2026 19:48:16.3959 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6c100ae8-2029-47b2-bfe7-08dec1a90e38 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF0002529E.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR12MB8718 Hi Danny, Thank you for all your work bringing this through so many revisions, and I am glad to help by testing it. I tested this on an AST2600-based OpenBMC platform (NVIDIA Vera Rubin) that has several CP2112s. With this patch, a CP2112 whose device-tree "i2c" subnode declares downstream I2C devices (PCA9555 expanders) has them auto-instantiated by i2c-core: they appeared on the adapter's I2C bus with their gpio-line-names. CP2112s with an empty "i2c" node registered their adapters but instantiated no children, as expected. Tested-by: Jacky Huang