jgarff / rpi_ws281x

I upgraded the firmware on a Pi Zero 2 running 64-bit Bullseye, and somehow the "warranty voided" bit got flipped on. Not a big deal, except then my LED code broke because it couldn't find that board revision anymore when using this library.

For 64 bit, I believe the warranty bit is not being masked (via /proc/device-tree/system/linux,revision). Here'e the relevant 2 lines of code that handle that in the 32 bit check.

rpi_ws281x/rpihw.c

Line 576 in 1ba8e38

// Take out warranty and manufacturer bits

And could be added here:

rpi_ws281x/rpihw.c

Line 536 in 1ba8e38

uint32_t hwver = rpi_hw_info[i].hwver;

Could this also be added to the 64 bit revision check as well? Thanks!

It's broadly my preference to just do away with this cursed hardware revision check nonsense once and for all.

I unfortunately don't have a lot of time to get lost in tweaking & testing the code- if you could figure out where this mask needs to be against your flipped board and raise a PR that would be very helpful.

Need to mask warranty bit when checking board revision for 64 bit as well