Add hack to handle BBB GPIO remapping #153
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As of Linux 5.15, the AM335x GPIO banks got reordered and this throws off the pin numbering. See comments for more details. The gist is that we hide it from existing programs to avoid the new mapping that's different from almost every Beaglebone doc on the web. This will make programs work with the caveat that anyone doing manual debugging of sysfs will notice it, be confused, and hopefully find this commit. The future has been to switch to cdev, but that's not happening in the v1.x branch so this is the workaround to allow Linux 5.15 and later.
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As of Linux 5.15, the AM335x GPIO banks got reordered and this throws off the pin numbering. See comments for more details. The gist is that we hide it from existing programs to avoid the new mapping that's different from almost every Beaglebone doc on the web. This will make programs work with the caveat that anyone doing manual debugging of sysfs will notice it, be confused, and hopefully find this commit.
The future has been to switch to cdev, but that's not happening in the v1.x branch so this is the workaround to allow Linux 5.15 and later.