On Wed, Apr 17, 2024 at 06:39:02AM -0700, Katu Txakur wrote: > Hi, > > I've built a, Yocto scarthgap, core-image-minimal for the > machine=beaglebone. When I booted what it's defined as gpio0 in the device > tree, it becomes /dev/gpiochip3. The rest are in order. > This also happened using the beaglebone-yocto machine. > This also happened using the beaglebone-yocto machine in Yocto kirkstone > branch.
man udev | udev supplies the system software with device events, manages permissions | of device nodes and may create additional symlinks in the /dev/ directory, | or renames network interfaces. The kernel usually just assigns unpredictable | device names based on the order of discovery. Meaningful symlinks or network | device names provide a way to reliably identify devices based on their | properties or current configuration. You can check which bus, device or address a specific dev node corresponds to: udevadm info /dev/gpiochip3 More details are in the corresponding entries of the virtual /sys filesystem. -- Denys
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