PWM on 4.4.6

[julianhille]

My goal is to have 4 Pins enabled as PWMs. (P9_16, P9_14, P8_13, P8_19).
I only need to change the duty on them they could have all the same period.
Through Adafruit_BBIO on the 14.03 ubuntu image this worked fine,
now im trying to upgrade to 4.4.x but feel completely lost.

I flashed opne of your images:
https://rcn-ee.com/rootfs/2016-04-07/flasher/
BBB-eMMC-flasher-debian-8.4-console-armhf-2016-04-07-2gb.img.xz

And did install this repo and rebooted. This is my slots file after manually echoing the starts of the
dt into the slots file.

cat /sys/devices/platform/bone_capemgr/slots
 0: PF----  -1
 1: PF----  -1
 2: PF----  -1
 3: PF----  -1
 4: P-O-L-   0 Override Board Name,00A0,Override Manuf,am33xx_pwm
 8: P-O-L-   1 Override Board Name,00A0,Override Manuf,bone_pwm_P9_14

This creates here a folder

root@arm:/sys/firmware/devicetree/base/pwm_test_P9_14# ls -lah
total 0
drwxr-xr-x  2 root root  0 Apr 25 08:52 .
drwxr-xr-x 18 root root  0 Apr 25 08:52 ..
-r--r--r--  1 root root  9 Apr 25 08:52 compatible
-r--r--r--  1 root root  4 Apr 25 08:52 duty
-r--r--r--  1 root root  4 Apr 25 08:52 enabled
-r--r--r--  1 root root 15 Apr 25 08:52 name
-r--r--r--  1 root root  4 Apr 25 08:52 pinctrl-0
-r--r--r--  1 root root  8 Apr 25 08:52 pinctrl-names
-r--r--r--  1 root root 10 Apr 25 08:52 pwm-names
-r--r--r--  1 root root 16 Apr 25 08:52 pwms
-r--r--r--  1 root root  5 Apr 25 08:52 status

Im trying to enable this in any way:

root@arm:/sys/firmware/devicetree/base/pwm_test_P9_14# echo "1" > enabled
bash: enabled: Permission denied
root@arm:/sys/firmware/devicetree/base/pwm_test_P9_14# echo "10" > duty
bash: duty: Permission denied

root@arm:/sys/firmware/devicetree/base/pwm_test_P9_14# cat compatible
pwm_test

root@arm:/sys/firmware/devicetree/base/pwm_test_P9_14# cat duty

root@arm:/sys/firmware/devicetree/base/pwm_test_P9_14# cat enabled

root@arm:/sys/firmware/devicetree/base/pwm_test_P9_14# cat name
pwm_test_P9_14

root@arm:/sys/firmware/devicetree/base/pwm_test_P9_14# cat pinctrl-0
�

root@arm:/sys/firmware/devicetree/base/pwm_test_P9_14# cat pinctrl-names
default

root@arm:/sys/firmware/devicetree/base/pwm_test_P9_14# cat pwm-names
PWM_P9_14


root@arm:/sys/firmware/devicetree/base/pwm_test_P9_14# cat status
okay

How to start them? Or is this a bug?

I also tried to use the base of the bacone and compile my own device tree but still could not get all my 4 Pins working at the same time.