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### Describe the bug
Apparently hardware timestamping is somehow broken and applications don't get timestamps delivered.
### Steps to reproduce the behaviour
Run ptp4l in hardware timestampin…
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I need to add a new section to the site for bridges/switches/adapters... because I'm finding that at least one of the three I've purchased doesn't seem to work with the Pi at all, giving me `pcie: lin…
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So in order to provide the high res 4-lane CSI, the i2c pins are needed. The i2s interface is also needed for sound capture from HDMI. By counterpoint, the CM4 exposes ADC interfaces on the SOM connec…
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这个项目看上去是我们想要的样子：
https://github.com/neggles/cm4io-fan/blob/master/dkms.post_build
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### Describe the bug
When compiling the kernel, various warnings (e.g., interrupt_provider) pop up.
### Steps to reproduce the behaviour
Comile the kernel as per instructions
### Device (s)
Raspb…
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I'm using a Radxa CM3 module on a Raspberry Pi CM4 IO Board.
I built the image as described, and flashed it onto the internal eMMC.
The board starts U-Boot SPL, but then hangs after verifying the ch…
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Is there any way to let the kernel the control the fan using the fan header on the CM4 IO Board? The fan always spins because it's plugged into a power adapter.
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As with [the Radxa CM3](https://github.com/geerlingguy/raspberry-pi-pcie-devices/issues/327), I would also like to test Pine64's [SOQuartz](https://wiki.pine64.org/wiki/SOQuartz) with some CM4 boards,…
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I've been testing for a few days and can conclude that the VL805 does not like USB MIDI devices getting unplugged. It may reset the entire USB bus. This means that mass storage devices are unmounted a…
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### Describe the bug
Hi,
I switched from Raspberry Pi OS version 11 to version 12 on my Compute Module 4 IO Board, and noticed the SATA PCIe adapter I'm using now causes an almost consistent cra…