Dear all,

Please ignore this patch because it has the my mistake. I'll send v3 patch.

Best Regards, Chanwoo Choi

On 11/25/19 9:47 AM, Chanwoo Choi wrote:

The commit 4585fbcb5331 ("PM / devfreq: Modify the device name as devfreq(X) for sysfs") changed the node name to devfreq(x). After this commit, it is not possible to get the device name through /sys/class/devfreq/devfreq(X)/*.

Add new name attribute in order to get device name.

Cc: stable@vger.kernel.org Fixes: 4585fbcb5331 ("PM / devfreq: Modify the device name as devfreq(X) for sysfs") Signed-off-by: Chanwoo Choi cw00.choi@samsung.com

---

Changes from v1:

• Update sysfs-class-devfreq documentation
• Show device name directly from 'devfreq->dev.parent'

Documentation/ABI/testing/sysfs-class-devfreq | 7 +++++++ drivers/devfreq/devfreq.c | 9 +++++++++ 2 files changed, 16 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-class-devfreq b/Documentation/ABI/testing/sysfs-class-devfreq index 01196e19afca..75897e2fde43 100644 --- a/Documentation/ABI/testing/sysfs-class-devfreq +++ b/Documentation/ABI/testing/sysfs-class-devfreq @@ -7,6 +7,13 @@ Description: The name of devfreq object denoted as ... is same as the name of device using devfreq. +What: /sys/class/devfreq/.../name +Date: November 2019 +Contact: Chanwoo Choi cw00.choi@samsung.com +Description:

• The /sys/class/devfreq/.../name shows the name of device
  

• of the corresponding devfreq object.
  

What: /sys/class/devfreq/.../governor Date: September 2011 Contact: MyungJoo Ham myungjoo.ham@samsung.com diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 61c3e2d08969..2e5f64ee1969 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -1476,7 +1476,16 @@ static ssize_t trans_stat_show(struct device *dev, } static DEVICE_ATTR_RO(trans_stat); +static ssize_t name_show(struct device *dev,

• 	struct device_attribute *attr, char *buf)
  

+{

• struct devfreq *devfreq = to_devfreq(dev);
• return sprintf(buf, "%s\n", dev_name(devfreq->dev.parent));

+} +static DEVICE_ATTR_RO(name);

static struct attribute *devfreq_attrs[] = {

• &dev_attr_name.attr, &dev_attr_governor.attr, &dev_attr_available_governors.attr, &dev_attr_cur_freq.attr,