P33M

Can you build the kernel with debug info, then post an annotated disassembly of the function in question? Comparing gcc 12 vs 13 would also be useful.

This struct can be statically sized - the hardware supports a maximum of 16 channels. BCM283x is configured for 8. However zero-length variable arrays are used elsewhere in the driver...

The commands in the HTML docs are sufficient. Appendix C in the PDF guide duplicates instructions on how to build OpenOCD, and omits the installation step which will put the...

This isn't a bug report, it's a feature request. We are aware of this "bonus speed" of certain SD cards. It is non-standard, there is no publicly available information on...

http://www.distec1.be/gs/mediaobjects/Oregon%20Scientific/Manuals/S%20-%20Z/WMRS200_EN.pdf I see the minimum system requirements are "Windows 98" and "300MHz or above CPU speed". So this thing is from the stone age, which means ancient microcontroller doing USB...

With a suitable multimeter and the device plugged into the top USB2.0 port (after enumeration has failed), can you measure the voltages on the underside of the Pi 5 between...

Those are nominally correct voltages for low-speed device attach. In that case further debug isn't going to be useful without a bus analyzer trace. Most generic logic analysers can also...

This is a stab in the dark, but is there any difference if you run these two commands ``` sudo busybox devmem 0x1f0020c204 32 0x41102540 sudo busybox devmem 0x1f0030c204 32...

The non-RT latency tail is far too big for PCIe DMA/link effects to be significant contributors. With short transfer sizes such as these, the hardware is used in interrupt-driven FIFO...

> The SPI controllers in RP1 do support HW CS so it might be possible to use it instead. The hardware chipselects are badly implemented. If the TX FIFO empties...