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Wed, 3 Aug 2022 07:27:08 -0500 From: Nipun Gupta To: , , , , , CC: , , , , Nipun Gupta Subject: [RFC PATCH 2/2] driver core: add compatible string in sysfs for platform devices Date: Wed, 3 Aug 2022 17:56:55 +0530 Message-ID: <20220803122655.100254-3-nipun.gupta@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220803122655.100254-1-nipun.gupta@amd.com> References: <20220803122655.100254-1-nipun.gupta@amd.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 0d0df5ff-af4e-424c-d4bd-08da754b7e6e X-MS-TrafficTypeDiagnostic: CY8PR12MB7340:EE_ 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:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230016)(4636009)(346002)(39860400002)(376002)(396003)(136003)(36840700001)(46966006)(40470700004)(44832011)(82310400005)(356005)(316002)(2906002)(86362001)(4326008)(8936002)(82740400003)(5660300002)(70206006)(70586007)(8676002)(81166007)(478600001)(2616005)(1076003)(40460700003)(426003)(36860700001)(6666004)(336012)(47076005)(26005)(41300700001)(186003)(40480700001)(36756003)(54906003)(110136005)(2101003)(36900700001);DIR:OUT;SFP:1101; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org For devices registered dynamically using platform_device_register API, this patch exposes the sysfs entry for the compatible string. Signed-off-by: Nipun Gupta --- drivers/base/platform.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 51bb2289865c..89949f88a0a1 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -1289,10 +1289,25 @@ static ssize_t driver_override_store(struct device *dev, } static DEVICE_ATTR_RW(driver_override); +static ssize_t compatible_show(struct device *dev, struct device_attribute *attr, + char *buf) +{ + const char *compat; + int ret; + + ret = device_property_read_string(dev, "compatible", &compat); + if (ret != 0) + return 0; + + return sysfs_emit(buf, "%s", compat); +} +static DEVICE_ATTR_RO(compatible); + static struct attribute *platform_dev_attrs[] = { &dev_attr_modalias.attr, &dev_attr_numa_node.attr, &dev_attr_driver_override.attr, + &dev_attr_compatible.attr, NULL, }; -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel