The AIO's pins sit on whichever /dev/gpiochip carries the Raspberry Pi's
40-pin header, and that number is no fact about the board: chip 0 on a
uConsole's CM4, chip 4 on a CM5 under its early kernels, chip 0 once
Raspberry Pi aliased the RP1 there, and another number again on some
later kernels. gpio_chip now defaults to -1, which asks each chip for its
label and takes the one called pinctrl-rp1, pinctrl-bcm2711 or
pinctrl-bcm2835, falling back to chip 0 where none is; a number in the
profile still pins it. The chip is settled once before the node starts,
so the node, every error and the lsof hint all name the same one.
The uConsole guide says CM4 and CM5 both work, that ClockworkPi's own
A-04, A-06 and R-01 cores are not supported, and explains which chip and
why; config.example.toml and the configuration guide say the same, and
the guide's test record now names the CM5 it has run on since 09-24.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Jean-Pierre MartineauandClaude Opus 5.5
22398128f5