[RFC PATCH 2/2] driver core: add compatible string in sysfs for platform devices
From: Nipun Gupta <nipun.gupta@amd.com>
Date: 2022-08-03 12:27:41
Also in:
lkml
Subsystem:
driver core, kobjects, debugfs and sysfs, the rest · Maintainers:
Greg Kroah-Hartman, "Rafael J. Wysocki", Danilo Krummrich, Linus Torvalds
For devices registered dynamically using platform_device_register API, this patch exposes the sysfs entry for the compatible string. Signed-off-by: Nipun Gupta <nipun.gupta@amd.com> --- 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
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