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Re: Using Raspberry POE+ hat with bullseye


On 11/29/21 00:36, Ryutaroh Matsumoto wrote:
I am using Debian Bullseye on a Raspberry PI 4 with a POE+ hat. So far I am
unable to get the fan on the POE+ hat working.
#uname -a
Linux host 5.10.0-9-arm64 #1 SMP Debian 5.10.70-1 (2021-09-30) aarch64 GNU/
#uname -a
Linux host 5.14.0-0.bpo.2-arm64 #1 SMP Debian 5.14.9-2~bpo11+1 (2021-10-10)
aarch64 GNU/Linux

* Debian arm64 (incl. images from raspi.debian.net) uses the plain upstream linux kernel.
* The plain kernel 5.10 does not have the RPi POE driver.
* 5.14 and later have the RPi POE driver, but the debian kernels do not enable it (so far).

I fixed that later part in git (https://deb.li/3Emxj). I don't have such a POE hat, so I cannot test if CONFIG_PWM_RASPBERRYPI_POE=m is enough to make that work. This should be included in the next upload to unstable (and probably also to backports).

Best regards

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