[PATCH v3 4/4] PM / devfreq: Modify the device name as devfreq[X] for sysfs

From: Chanwoo Choi
Date: Mon Jan 16 2017 - 07:26:51 EST


This patch modifies the device name as devfreq[X] for sysfs by using the 'devfreq'
prefix word instead of separate device name. On user-space aspect, user would
find the some devfreq drvier with 'devfreq[X]' pattern. So, this patch modify the
device name as following:
- /sys/class/devfreq/[non-standard device name] -> /sys/class/devfreq/devfreq[X]

Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
---
drivers/devfreq/devfreq.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 8e5938c9c7d6..4bd7a8f71b07 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -527,6 +527,7 @@ struct devfreq *devfreq_add_device(struct device *dev,
{
struct devfreq *devfreq;
struct devfreq_governor *governor;
+ static atomic_t devfreq_no = ATOMIC_INIT(-1);
int err = 0;

if (!dev || !profile || !governor_name) {
@@ -568,7 +569,8 @@ struct devfreq *devfreq_add_device(struct device *dev,
mutex_lock(&devfreq->lock);
}

- dev_set_name(&devfreq->dev, "%s", dev_name(dev));
+ dev_set_name(&devfreq->dev, "devfreq%lu",
+ (unsigned long)atomic_inc_return(&devfreq_no));
err = device_register(&devfreq->dev);
if (err) {
mutex_unlock(&devfreq->lock);
--
1.9.1