Commit 2fee1a7c authored by Chanwoo Choi's avatar Chanwoo Choi
Browse files

PM / devfreq: Add new name attribute for sysfs 



The commit 4585fbcb ("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: 4585fbcb ("PM / devfreq: Modify the device name as devfreq(X) for sysfs")
Signed-off-by: default avatarChanwoo Choi <cw00.choi@samsung.com>
parent 5af744eb

Documentation/ABI/testing/sysfs-class-devfreq

+7 −0
Original line number Diff line number Diff line
@@ -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>

drivers/devfreq/devfreq.c

+9 −0
Original line number Diff line number Diff line
@@ -1259,6 +1259,14 @@ err_out: 
}

EXPORT_SYMBOL(devfreq_remove_governor);



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 ssize_t governor_show(struct device *dev,

			     struct device_attribute *attr, char *buf)

{
@@ -1592,6 +1600,7 @@ static ssize_t trans_stat_show(struct device *dev, 
static DEVICE_ATTR_RO(trans_stat);



static struct attribute *devfreq_attrs[] = {

	&dev_attr_name.attr,

	&dev_attr_governor.attr,

	&dev_attr_available_governors.attr,

	&dev_attr_cur_freq.attr,

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