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Wysocki" , Jeremy Linton , Andrew Lunn , Andy Shevchenko , Florian Fainelli , Russell King - ARM Linux admin , Cristi Sovaiala , Florin Laurentiu Chiculita , Ioana Ciornei , Madalin Bucur , Heikki Krogerus , Marcin Wojtas , Pieter Jansen Van Vuuren , Jon Cc: Diana Madalina Craciun , linux-kernel@vger.kernel.org, netdev@vger.kernel.org, Laurentiu Tudor , linux-acpi@vger.kernel.org, linux.cj@gmail.com, linux-arm-kernel@lists.infradead.org, Calvin Johnson , Andy Shevchenko , Bartosz Golaszewski , Greg Kroah-Hartman , Laurent Pinchart , Randy Dunlap , Saravana Kannan Subject: [net-next PATCH v3 09/15] device property: Introduce fwnode_get_id() Date: Tue, 12 Jan 2021 19:10:48 +0530 Message-Id: <20210112134054.342-10-calvin.johnson@oss.nxp.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210112134054.342-1-calvin.johnson@oss.nxp.com> References: <20210112134054.342-1-calvin.johnson@oss.nxp.com> Content-Type: text/plain X-Originating-IP: [14.142.151.118] X-ClientProxiedBy: SG2PR02CA0047.apcprd02.prod.outlook.com (2603:1096:3:18::35) To AM0PR04MB5636.eurprd04.prod.outlook.com (2603:10a6:208:130::22) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from lsv03152.swis.in-blr01.nxp.com (14.142.151.118) by SG2PR02CA0047.apcprd02.prod.outlook.com (2603:1096:3:18::35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3742.6 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?l28qWYgE38+sUJcGLODE7liYlQllDCn4sUB2nWEmSEsS8K8EpCyrb9sdnFRl?= =?us-ascii?Q?Uyclyo+O1Q0t7/eQ7XDdian4dgxCJm8rCWDlDtLlRflhWbrpTqG0JnuvsrW+?= =?us-ascii?Q?1yqnX46I7rAoZpPegdmk5eSxQiNDmWAZy4cpA5uvI7RrzEG7IJXgVZ1jft6N?= =?us-ascii?Q?YB80C+agkEJApgDCbmkT/VJ4e29aegP1hqTEoNHMXaIv0UVj3X2W4C9Ka1zN?= =?us-ascii?Q?0r3uJqOkgV4c/A9yGM+I940uakRpkWqD5larCI2aRJ5JfGOI+0RiEZ7aBx9y?= =?us-ascii?Q?TrASgkSkv6nas3ECeIWvae3VVtOn1qn2yEGSBNHkV4j2W7XSGnD3DgFQm9wB?= =?us-ascii?Q?167cxh+o+y0ZnyjhQtxZFOso+3nrfhDVx26C9NM1ZyXT2huKjg96H8Kzft1X?= =?us-ascii?Q?yQrJ720grahrxQURwKh4KyJZXL/eoFp4FPwnD3OU0HfnQBENuWstmiqytTal?= =?us-ascii?Q?Uwumc8kcRoEDFkzUq8ujT/3UvuKZ9sYiMMSP+kuxBvCNBRTMPvKUdQfG8CnF?= =?us-ascii?Q?4LqIiMh3zXtp3pSFqg5o0dVi8MtFeRocdLklbVa1DQj/POTeSPLz9OIP+GvL?= =?us-ascii?Q?a56VJhHAF/nMcFLVumHVPLHd+jZ/sdDSOS/qAvM190yLYtwVexFKaMr+VaoI?= =?us-ascii?Q?M0MOCWRASLbCvyD4090aF4e+bXRxeKsoh6VnRYTRkkDLvF2lWH5Dg6Wco6Jy?= =?us-ascii?Q?hnVNLSo3YKZhmZiAVsFoitGXYncCpGXpngOkpyG3ZGxBINH8DOGTU6QoTAHz?= =?us-ascii?Q?apYYg4/0Yo9KJSsTNr9dNcMs7kkMge7Z87RGpRo8VYVpKqG1+M4nhMuJ0ILt?= =?us-ascii?Q?jN5QQZcZbWc6sA9B7XQCAwSF0Muf0ThtCX7oNfkwZhxbBrukAeqG0KKULjNh?= =?us-ascii?Q?MEQy0qfERjJtmQa4L+IERg7ZIW7EtufdLKK4JCvPs2KS7RT/ODRbfDUr/OPq?= =?us-ascii?Q?b20IdpIP6egTSJagiKyxu+b81yUNLqIxeJivYHUkDhDPAiGfETB1oKzmoiHE?= =?us-ascii?Q?rjRz?= X-OriginatorOrg: oss.nxp.com X-MS-Exchange-CrossTenant-AuthSource: AM0PR04MB5636.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Jan 2021 13:42:37.9337 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-Network-Message-Id: f3a8946f-1c03-40b0-1095-08d8b6ffece7 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: FbTZc7H8tilziRCeOzE9HTh1vfkWdhnfBiMuQbKAqBnD+YekZsTx5olsD7NXcmzIrCZ1aMRrrnTAC0KfQTCLZw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AM0PR04MB6436 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Using fwnode_get_id(), get the reg property value for DT node or get the _ADR object value for ACPI node. Signed-off-by: Calvin Johnson --- Changes in v3: - Modified to retrieve reg property value for ACPI as well - Resolved compilation issue with CONFIG_ACPI = n - Added more info into documentation Changes in v2: None drivers/base/property.c | 33 +++++++++++++++++++++++++++++++++ include/linux/property.h | 1 + 2 files changed, 34 insertions(+) diff --git a/drivers/base/property.c b/drivers/base/property.c index 35b95c6ac0c6..2d51108cb936 100644 --- a/drivers/base/property.c +++ b/drivers/base/property.c @@ -580,6 +580,39 @@ const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode) return fwnode_call_ptr_op(fwnode, get_name_prefix); } +/** + * fwnode_get_id - Get the id of a fwnode. + * @fwnode: firmware node + * @id: id of the fwnode + * + * This function provides the id of a fwnode which can be either + * DT or ACPI node. For ACPI, "reg" property value, if present will + * be provided or else _ADR value will be provided. + * Returns 0 on success or a negative errno. + */ +int fwnode_get_id(struct fwnode_handle *fwnode, u32 *id) +{ +#ifdef CONFIG_ACPI + unsigned long long adr; + acpi_status status; +#endif + int ret; + + ret = fwnode_property_read_u32(fwnode, "reg", id); + if (!(ret && is_acpi_node(fwnode))) + return ret; + +#ifdef CONFIG_ACPI + status = acpi_evaluate_integer(ACPI_HANDLE_FWNODE(fwnode), + METHOD_NAME__ADR, NULL, &adr); + if (ACPI_FAILURE(status)) + return -EINVAL; + *id = (u32)adr; +#endif + return 0; +} +EXPORT_SYMBOL_GPL(fwnode_get_id); + /** * fwnode_get_parent - Return parent firwmare node * @fwnode: Firmware whose parent is retrieved diff --git a/include/linux/property.h b/include/linux/property.h index 0a9001fe7aea..3f41475f010b 100644 --- a/include/linux/property.h +++ b/include/linux/property.h @@ -82,6 +82,7 @@ struct fwnode_handle *fwnode_find_reference(const struct fwnode_handle *fwnode, const char *fwnode_get_name(const struct fwnode_handle *fwnode); const char *fwnode_get_name_prefix(const struct fwnode_handle *fwnode); +int fwnode_get_id(struct fwnode_handle *fwnode, u32 *id); struct fwnode_handle *fwnode_get_parent(const struct fwnode_handle *fwnode); struct fwnode_handle *fwnode_get_next_parent( struct fwnode_handle *fwnode); -- 2.17.1