Interfacing (DSI, CSI, I2C, etc.) • RPi5 lite pwm-pio fails

nasomv@rpi54:~ $ hostnamectl
Static hostname: rpi54
Icon name: computer
Machine ID: 9685ebdc7a574f2c80c6c42a0e165d63
Boot ID: 8b3b1eda449a48c8bbeffa1cca24862e
Operating System: Debian GNU/Linux 12 (bookworm)
Kernel: Linux 6.12.62+rpt-rpi-2712
Architecture: arm64

/boot/firmware/config.txt contains: dtoverlay=pwm-pio,gpio=27

/dev/pio0 exists

/sys/class/pwm/pwmclass0 exists but no pwmclass1 as I've seen on another RPi 5 with full trixie.

nasomv@rpi54:~ $ dmesg | grep pwm
[ 3.199249] pwm-pio-rp1 pwm_pio@1b: error -ENOENT: /pwm_pio@1b: could not open PIO
[ 3.207659] pwm-pio-rp1 pwm_pio@1b: probe with driver pwm-pio-rp1 failed with error -2

How to clear this dmesg error?

Thanks, Morris

Statistics: Posted by p26grinz — Fri Feb 06, 2026 6:46 pm — Replies 1 — Views 32

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