Package Broken on Newer Versions of Rapberry Pi OS

[MatthewJones517]

As noted in PR #37, newer versions of Raspberry Pi OS are no longer naming GPIO chips sequentially. On my RPi 400 currently running the latest version of Raspian Lite, I have the following in /dev

• gpiochip0
• gpiochip1
• gpiochip4

The following line of code:

final chips = FlutterGpiod.instance.chips;

Now generates this error:

Could not open GPIO chip 2, path = /dev/gpiochip2

The thing is, I don't have a gpiochip2. Just 0, 1, and 4. I have yet to be able to find a workaround for this. I'm not sure that #37 will fix this, but it seems like the closest thing to my issue that I've found.

[ardera]

Thanks for the notice. I don't know why they would do that, but yeah, seems like we can say goodbye to the sequential chip numbers. For me on raspberry pi 5 there's even more jumps:

hannes@pi5:~ $ gpiodetect
gpiochip0 [pinctrl-rp1] (54 lines)
gpiochip10 [gpio-brcmstb@107d508500] (32 lines)
gpiochip11 [gpio-brcmstb@107d517c00] (17 lines)
gpiochip12 [gpio-brcmstb@107d517c20] (6 lines)
gpiochip13 [gpio-brcmstb@107d508520] (4 lines)
gpiochip14 [7inch-touchscreen-p] (2 lines)
gpiochip0 [pinctrl-rp1] (54 lines)

#37 does look like a good fix though, even though it will require a breaking change.

[MatthewJones517]

Yeah, it seems a little silly of Raspberry Pi OS's side. It's insane how much worse it is on the Rpi5.

Thanks for taking a look at the issue. I really like this package a lot. :)