driver core: add dev_groups to all drivers

Add the ability for the driver core to create and remove a list of
attribute groups automatically when the device is bound/unbound from a
specific driver.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Tested-by: Richard Gong <richard.gong@linux.intel.com>
Link: https://lore.kernel.org/r/20190731124349.4474-2-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index c330b75c6c57..98c00b71b598 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -262,6 +262,8 @@ enum probe_type {
  * @resume:     Called to bring a device from sleep mode.
  * @groups:     Default attributes that get created by the driver core
  *              automatically.
+ * @dev_groups: Additional attributes attached to device instance once the
+ *              it is bound to the driver.
  * @pm:         Power management operations of the device which matched
  *              this driver.
  * @coredump:   Called when sysfs entry is written to. The device driver
@@ -296,6 +298,7 @@ struct device_driver {
         int (*suspend) (struct device *dev, pm_message_t state);
         int (*resume) (struct device *dev);
         const struct attribute_group **groups;
+        const struct attribute_group **dev_groups;
 
         const struct dev_pm_ops *pm;
         void (*coredump) (struct device *dev);