| Message ID | 1526980904-11041-1-git-send-email-fabrice.gasnier@st.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Revert "pwm: Set class for exported channels in sysfs" | expand |
diff --git a/drivers/pwm/sysfs.c b/drivers/pwm/sysfs.c index 7c71cdb..4726d43 100644 --- a/drivers/pwm/sysfs.c +++ b/drivers/pwm/sysfs.c @@ -263,7 +263,6 @@ static int pwm_export_child(struct device *parent, struct pwm_device *pwm) export->pwm = pwm; mutex_init(&export->lock); - export->child.class = parent->class; export->child.release = pwm_export_release; export->child.parent = parent; export->child.devt = MKDEV(0, 0);
This reverts commit 7e5d1fd75c3dde9fc10c4472b9368089d1b81d00 as it causes regression with multiple pwm chip. It creates a new entry in '/sys/class/pwm' every time a 'pwmX' is exported with 'echo X > export': - 1st time export will create an entry in /sys/class/pwm/pwmX - when another export happens on another pwmchip, it can't be created (e.g. -EEXIST) This also changes existing ABI (Documentation/ABI/testing/sysfs-class-pwm): - pmwX should be there: /sys/class/pwm/pwmchipN/pwmX Example on stm32 (stm32429i-eval) platform: $ ls /sys/class/pwm pwmchip0 pwmchip4 $ cd /sys/class/pwm/pwmchip0/ $ echo 0 > export $ ls /sys/class/pwm pwm0 pwmchip0 pwmchip4 $ cd /sys/class/pwm/pwmchip4/ $ echo 0 > export sysfs: cannot create duplicate filename '/class/pwm/pwm0' ...Exception stack follows... Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> --- drivers/pwm/sysfs.c | 1 - 1 file changed, 1 deletion(-)