From: Mario Limonciello <mario.limonciello@xxxxxxx>
Some drivers have static information that can be useful for userspace to
have, but maintaining a sysfs file is overkill. Add an optional callback
for drivers to be able to add their own uevent variables.
Cc: Richard Hughes <hughsient@xxxxxxxxx>
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
drivers/hid/hid-core.c | 6 ++++++
include/linux/hid.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 1b18e0dadbac..de95470066d9 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -2844,6 +2844,12 @@ static int hid_uevent(const struct device *dev, struct kobj_uevent_env *env)
hdev->firmware_version))
return -ENOMEM;
}
+ if (hdev->uevent) {
+ int ret = hdev->uevent(dev, env);
+
+ if (ret)
+ return ret;
+ }
return 0;
}
diff --git a/include/linux/hid.h b/include/linux/hid.h
index ffc81a8c7a49..36e3c167c7ff 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -680,6 +680,7 @@ struct hid_device {
void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
struct hid_usage *, __s32);
void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
+ int (*uevent)(const struct device *dev, struct kobj_uevent_env *env);
/* debugging support via debugfs */
unsigned short debug;
--
2.50.0
