korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-19 18:24:14 +08:00
Code Issues Packages Projects Releases Wiki Activity

pwm: Set class for exported channels in sysfs

Browse Source 
Notifications for devices without bus or class set get dropped by
dev_uevent_filter(). Adding the class to the exported child matches
what the GPIO subsystem is doing.

With this change exporting a channel triggers a udev event, which
gives userspace a chance to fixup permissions and makes it possible
for non-root users to make use of the PWM subsystem.

Signed-off-by: Gottfried Haider <gottfried.haider@gmail.com>
CC: Thierry Reding <thierry.reding@gmail.com>
CC: H Hartley Sweeten <hsweeten@visionengravers.com>
CC: linux-pwm@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-rpi-kernel@lists.infradead.org
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Gottfried Haider 2017-09-26 11:59:51 +00:00 committed by Thierry Reding
parent 4fbd8d194f
commit 7e5d1fd75c
1 changed files with 1 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/pwm/sysfs.c
View File

@ -263,6 +263,7 @@ static int pwm_export_child(struct device *parent, struct pwm_device *pwm)
export->pwm = pwm; export->pwm = pwm;
mutex_init(&export->lock); mutex_init(&export->lock);
export->child.class = parent->class;
export->child.release = pwm_export_release; export->child.release = pwm_export_release;
export->child.parent = parent; export->child.parent = parent;
export->child.devt = MKDEV(0, 0); export->child.devt = MKDEV(0, 0);