[PATCH v4 1/2] PM / devfreq: Allow devfreq driver to add custom sysfs ABIs

[Jie Zhan]

Extend the devfreq_dev_profile to allow drivers optionally create
device-specific sysfs ABIs together with other common devfreq ABIs under
the devfreq device path.

Signed-off-by: Jie Zhan <zhanjie9 at hisilicon.com>
---
 drivers/devfreq/devfreq.c | 1 +
 include/linux/devfreq.h   | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 46f3a8053197..59f4656f5ed6 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -831,6 +831,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
 	mutex_lock(&devfreq->lock);
 	devfreq->dev.parent = dev;
 	devfreq->dev.class = devfreq_class;
+	devfreq->dev.groups = profile->dev_groups;
 	devfreq->dev.release = devfreq_dev_release;
 	INIT_LIST_HEAD(&devfreq->node);
 	devfreq->profile = profile;
diff --git a/include/linux/devfreq.h b/include/linux/devfreq.h
index d312ffbac4dd..dc1075dc3446 100644
--- a/include/linux/devfreq.h
+++ b/include/linux/devfreq.h
@@ -103,6 +103,8 @@ struct devfreq_dev_status {
  *
  * @is_cooling_device: A self-explanatory boolean giving the device a
  *                     cooling effect property.
+ * @dev_groups:		Optional device-specific sysfs attribute groups that to
+ *			be attached to the devfreq device.
  */
 struct devfreq_dev_profile {
 	unsigned long initial_freq;
@@ -119,6 +121,8 @@ struct devfreq_dev_profile {
 	unsigned int max_state;
 
 	bool is_cooling_device;
+
+	const struct attribute_group **dev_groups;
 };
 
 /**
-- 
2.33.0