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Fri, 28 Jan 2022 03:44:58 -0800 From: Akhil R To: , , , , , , , , , , , , , , , CC: Subject: [PATCH v5 1/3] device property: Add fwnode_irq_get_byname Date: Fri, 28 Jan 2022 17:14:25 +0530 Message-ID: <1643370267-31804-2-git-send-email-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1643370267-31804-1-git-send-email-akhilrajeev@nvidia.com> References: <1643370267-31804-1-git-send-email-akhilrajeev@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 0ef56112-9f6a-471b-797a-08d9e2539ff3 X-MS-TrafficTypeDiagnostic: DM6PR12MB5551:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4502; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:12.22.5.235;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:mail.nvidia.com;PTR:InfoNoRecords;CAT:NONE;SFS:(13230001)(4636009)(46966006)(36840700001)(40470700004)(70586007)(70206006)(336012)(8936002)(82310400004)(426003)(4326008)(8676002)(356005)(40460700003)(86362001)(7416002)(5660300002)(7696005)(107886003)(36860700001)(26005)(921005)(186003)(6666004)(2906002)(2616005)(508600001)(36756003)(47076005)(81166007)(110136005)(316002)(2101003)(36900700001)(83996005)(20210929001);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Jan 2022 11:45:04.1613 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 0ef56112-9f6a-471b-797a-08d9e2539ff3 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.235];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT048.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB5551 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add fwnode_irq_get_byname() to get an interrupt by name from either ACPI table or Device Tree, whichever is used for enumeration. In the ACPI case, this allow us to use 'interrupt-names' in _DSD which can be mapped to Interrupt() resource by index. The implementation is similar to 'interrupt-names' in the Device Tree. Signed-off-by: Akhil R Reviewed-by: Andy Shevchenko Acked-by: Rafael J. Wysocki --- drivers/base/property.c | 29 +++++++++++++++++++++++++++++ include/linux/property.h | 1 + 2 files changed, 30 insertions(+) diff --git a/drivers/base/property.c b/drivers/base/property.c index e6497f6..fc59e0f 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -936,6 +936,35 @@ void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index) EXPORT_SYMBOL(fwnode_iomap); /** + * fwnode_irq_get_byname - Get IRQ from a fwnode using its name + * @fwnode: Pointer to the firmware node + * @name: IRQ name + * + * Description: + * Find a match to the string @name in the 'interrupt-names' string array + * in _DSD for ACPI, or of_node for Device Tree. Then get the Linux IRQ + * number of the IRQ resource corresponding to the index of the matched + * string. + * + * Return: + * Linux IRQ number on success, or negative errno otherwise. + */ +int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name) +{ + int index; + + if (!name) + return -EINVAL; + + index = fwnode_property_match_string(fwnode, "interrupt-names", name); + if (index < 0) + return index; + + return fwnode_irq_get(fwnode, index); +} +EXPORT_SYMBOL(fwnode_irq_get_byname); + +/** * fwnode_graph_get_next_endpoint - Get next endpoint firmware node * @fwnode: Pointer to the parent firmware node * @prev: Previous endpoint node or %NULL to get the first diff --git a/include/linux/property.h b/include/linux/property.h index 7399a0b..95d56a5 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -121,6 +121,7 @@ struct fwnode_handle *fwnode_handle_get(struct fwnode_handle *fwnode); void fwnode_handle_put(struct fwnode_handle *fwnode); int fwnode_irq_get(const struct fwnode_handle *fwnode, unsigned int index); +int fwnode_irq_get_byname(const struct fwnode_handle *fwnode, const char *name); void __iomem *fwnode_iomap(struct fwnode_handle *fwnode, int index); -- 2.7.4