Duplicate of 1949276
** Changed in: linux-meta-raspi (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1949275
Title:
linux-image-raspi PWM not available
Status in linux-meta-raspi package in Ubuntu:
Invalid
Bug description:
I'm using Raspberry Pi 4b with Ubuntu 21.10.
Seems like all 5.13 kernels don't have PWM support.
Replication steps:
- Enable pwm in config.txt:
dtoverlay=pwm-2chan,pin=12,func=4,pin2=13,func2=4
- Check /sys/class/pwm
Expected result:
PWM exists
- What I get:
root@raspberrypi:~# ls -l /sys/class/pwm/
total 0
root@raspberrypi:~#
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Same output with 5.11.0-1021-raspi kernel:
root@raspberrypi:~# uname -a
Linux raspberrypi 5.11.0-1021-raspi #22-Ubuntu SMP PREEMPT Wed Oct 6 17:30:38
UTC 2021 aarch64 aarch64 aarch64 GNU/Linux
root@raspberrypi:~# ls -l /sys/class/pwm/
total 0
lrwxrwxrwx 1 root root 0 окт 31 00:49 pwmchip0 ->
../../devices/platform/soc/fe20c000.pwm/pwm/pwmchip0
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