diff options
| author | Chanwoo Choi <cw00.choi@samsung.com> | 2019-11-05 18:18:03 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-05 21:22:40 +0000 |
| commit | da1321fc1405e24b7ffb3fac670b67ae700bc5ce (patch) | |
| tree | b374455ff84c671038623b8b5e47a9a77473e769 | |
| parent | e9fac00465791b62eaf3bad5c36f85e59958c651 (diff) | |
PM / devfreq: Add new name attribute for sysfs
commit 2fee1a7cc6b1ce6634bb0f025be2c94a58dfa34d upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-class-devfreq | 7 | ||||
| -rw-r--r-- | drivers/devfreq/devfreq.c | 9 |
2 files changed, 16 insertions, 0 deletions
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 c64d20fdc187..174795ecbd3b 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -1112,6 +1112,14 @@ 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) { @@ -1440,6 +1448,7 @@ 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, |