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Thu, 9 Apr 2026 23:07:13 -0700 From: Akhil R To: CC: , , , , , , , , , , , , , , , , , , , Subject: Re: [PATCH v2 09/13] i3c: dw-i3c-master: Add a quirk to skip clock and reset Date: Fri, 10 Apr 2026 11:37:11 +0530 Message-ID: <20260410060712.30377-1-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS1PEPF0001709A:EE_|SA5PPF5EA4322E1:EE_ X-MS-Office365-Filtering-Correlation-Id: 52b81259-b51e-468b-c161-08de96c776a8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|82310400026|1800799024|7416014|376014|13003099007|22082099003|18002099003|56012099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(36860700016)(82310400026)(1800799024)(7416014)(376014)(13003099007)(22082099003)(18002099003)(56012099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: dYPGxmlN8OeWEunMwsf5QXyo1mQ+GhfOFNxYN9ai2vn+ODgR5vS1HfnbkSUtONaivOdgsSeHlUDWDMcqPyxM6ZRX7QuIU8rs3TtD3SpqWttXkEl20wwdG6maVk03Aaf8rqlzvD7t/I/VUOXT2TZBFvqfQ8GtfYYPtJDr8MKeS5xiTmZ8ukrCYJhSg5yG4SP4biyn+5fM0Luulrs+8kzV4P2SADbXfqr4Kal3lVPjESjxsMn9+Ggr152o3Hdqih9Fz3Xg0IDwtj1RcNir+xQ+rmW++C7rq8Yv9DHTTwGHGJd4x/FXmmxhKuiqXgCYc/zhVmIJsYRv11RZs3EQPv0OzGZRnnlOlusta5cuM0fcrik57+Mt66/TlTOyaNzgDAZ3xMh0k19isS6kuODUAou+LUH1HKUUFDTb2ir/zT6dEx4CikMiNMXyzw+uQUNrN5+o X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Apr 2026 06:07:36.3569 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 52b81259-b51e-468b-c161-08de96c776a8 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: DS1PEPF0001709A.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA5PPF5EA4322E1 On Thu, 9 Apr 2026 22:45:09 -0400, Frank Li wrote: > On Thu, Apr 09, 2026 at 04:27:39PM +0530, Akhil R wrote: >> Some ACPI-enumerated devices like Tegra410 do not have clock and reset >> resources exposed via the clk/reset frameworks. Add a match data for > > why not export fix clock at ACPI? > >> such devices to skip acquiring clock and reset controls during probe. >> >> Move match data parsing before clock/reset acquisition so the quirk is >> available early enough. When the quirk is set, fall back to reading >> the clock rate from the "clock-frequency" device property instead. > > "clock-frequency" is legacy proptery. The document ACPI on ARMv8 Servers [1] suggests not to use clock or reset framework at all. I also could not find any proper way to export the clock to the kernel from the ACPI table. The same document suggests to use only _DSD properties, if to pass any data to the kernel. I can rename the property to 'default-clock-rate' if that sounds good. Please let me know your suggestion. [1]: https://www.kernel.org/doc/html/v6.1/arm64/arm-acpi.html#programmable-power-control-resources Best Regards, Akhil