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Wed, 24 Jun 2026 03:23:29 -0700 From: Akhil R To: Alexandre Belloni CC: Frank Li , Miquel Raynal , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Guenter Roeck , Philipp Zabel , Jon Hunter , Thierry Reding , , , , , , Akhil R Subject: [PATCH v5 06/12] i3c: master: match I3C device through DT and ACPI Date: Wed, 24 Jun 2026 10:21:00 +0000 Message-ID: <20260624102153.1770072-7-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260624102153.1770072-1-akhilrajeev@nvidia.com> References: <20260624102153.1770072-1-akhilrajeev@nvidia.com> MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF000397B3:EE_|SA0PR12MB4365:EE_ X-MS-Office365-Filtering-Correlation-Id: 997accb8-944c-4947-718c-08ded1daaff1 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|23010399003|376014|7416014|82310400026|36860700016|56012099006|6133799003|22082099003|18002099003|3023799007|11063799006; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-i3c" Errors-To: linux-i3c-bounces+linux-i3c=archiver.kernel.org@lists.infradead.org SETAASA-based devices cannot always be identified by PID or DCR; the standard I3C id_table matching may not be applicable. Allow such devices to match through Device Tree or ACPI. Emit OF and ACPI modaliases so firmware-matched devices can autoload their drivers. Reviewed-by: Frank Li Signed-off-by: Akhil R --- drivers/i3c/master.c | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index bd0dc76c7ba1..f513169ac395 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -320,6 +321,15 @@ static int i3c_device_uevent(const struct device *dev, struct kobj_uevent_env *e const struct i3c_device *i3cdev = dev_to_i3cdev(dev); struct i3c_device_info devinfo; u16 manuf, part, ext; + int rc; + + rc = of_device_uevent_modalias(dev, env); + if (rc != -ENODEV) + return rc; + + rc = acpi_device_uevent_modalias(dev, env); + if (rc != -ENODEV) + return rc; if (i3cdev->desc) devinfo = i3cdev->desc->info; @@ -345,15 +355,32 @@ static int i3c_device_match(struct device *dev, const struct device_driver *drv) { struct i3c_device *i3cdev; const struct i3c_driver *i3cdrv; + u8 static_addr_method = 0; if (dev->type != &i3c_device_type) return 0; i3cdev = dev_to_i3cdev(dev); i3cdrv = drv_to_i3cdrv(drv); - if (i3c_device_match_id(i3cdev, i3cdrv->id_table)) + + if (i3cdev->desc && i3cdev->desc->boardinfo) + static_addr_method = i3cdev->desc->boardinfo->static_addr_method; + + /* + * SETAASA-based devices need not always have a matching ID since + * it is not mandatory for such devices to implement deviceinfo + * CCC commands. Allow them to register through DT or ACPI. + */ + if (i3cdrv->id_table && i3c_device_match_id(i3cdev, i3cdrv->id_table)) return 1; + if (static_addr_method & I3C_ADDR_METHOD_SETAASA) { + if (of_driver_match_device(dev, drv)) + return 1; + if (acpi_driver_match_device(dev, drv)) + return 1; + } + return 0; } -- 2.43.0 -- linux-i3c mailing list linux-i3c@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-i3c