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Sat, 3 Oct 2026 13:05:19 +0000 Date: Sat, 3 Oct 2026 21:09:48 +0800 From: Peng Fan To: Sudeep Holla Cc: arm-scmi@vger.kernel.org, Hans de Goede , Pengutronix Kernel Team , NXP S32 Linux Team , Linus Walleij , linux-gpio@vger.kernel.org, imx@lists.linux.dev Subject: Re: [PATCH 0/4] firmware: arm_scmi: Some fixes to address conflicts with fw_devlink Message-ID: References: <20261002-scmi_bus_fixes-v1-0-8695cbab3fe7@kernel.org> Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20261002-scmi_bus_fixes-v1-0-8695cbab3fe7@kernel.org> X-ClientProxiedBy: MA5P287CA0309.INDP287.PROD.OUTLOOK.COM (2603:1096:a01:21a::12) To AM8PR04MB7874.eurprd04.prod.outlook.com (2603:10a6:20b:24d::9) Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM8PR04MB7874:EE_|GV4PR04MB11970:EE_ X-MS-Office365-Filtering-Correlation-Id: bf3d6f5b-77c2-4cfb-fb24-08df214efa07 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|366016|1800799024|19092799006|376014|18002099003|22082099003|11063799006|3023799007|10067099003|56012099006; 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His [2] shows the consequence: the first device owns >the fwnode but does not bind, so fw_devlink can leave consumers deferred >even when another device binds successfully. > >This four-patch series reduces those cases within SCMI. It prevents >protocol device creation in exclusive raw mode, stops treating core >created standard devices as driver owned requests, and makes the i.MX >pinctrl driver match the standard `pinctrl` device instead of creating >a second device for the same fwnode. It also omits the `perf` device >when the firmware node does not describe a performance domain provider, >without changing `cpufreq` device creation. IIO/HWMON don't have any >fw_devlink dependency and having two devices shouldn't be an issue. > >These changes address the SCMI cases above; they do not provide a >general driver core solution for devices that share a fwnode. > >Signed-off-by: Sudeep Holla > >[1] https://lore.kernel.org/all/20250120-scmi-fwdevlink-v2-0-3af2fa37dbac@nxp.com >[2] https://lore.kernel.org/all/20260928-driver-core-v1-1-0846bb8e0f32@nxp.com > >--- >Sudeep Holla (4): > firmware: arm_scmi: Avoid protocol devices in exclusive raw mode > firmware: arm_scmi: Skip requests for standard protocol devices > pinctrl: imx: Match the standard SCMI pinctrl device > firmware: arm_scmi: Skip unused performance-domain devices > Tested-by: Peng Fan #i.MX95 EVK Thanks Peng