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Many users are reluctant to use libgpiod instead of the deprecated /sys/class/gpio interface. The gpiod-sysfs-proxy project aims at making the transition easier by implementing a compatibility layer in user-space using FUSE and python3-gpiod. This way we can eat the cookie by disabling the sysfs ABI and have the users have it too by sticking to their existing scripts. The project itself is a very simple setuptools-based python package but the recipe is quite complex due to comprehensive distro integration. By default we use /run/gpio as mountpoint. For full backward compatibility with the kernel interface, the user must explicitly add the 'sys-class-mount' switch to PACKAGECONFIG. We do this because, depending on whether CONFIG_GPIO_SYSFS Kconfig option is enabled, /sys/class/gpio will either be non-empty or not exist at all. In the latter case, we need to somehow create the /sys/class/gpio and, since user-space is not allowed to mkdir() inside sysfs, we use overlayfs for that. As this is rather non-standard, we want the user to be aware of this. We support both systemd and sys V init managers. We also provide a ptest package which uses an external gpio-sysfs-compat-tests script. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org> Signed-off-by: Khem Raj <raj.khem@gmail.com>
22 lines
416 B
Bash
22 lines
416 B
Bash
#!/bin/sh
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ptestdir=$(dirname "$(readlink -f "$0")")
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testbin="gpio-sysfs-compat-tests"
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modprobe gpio-sim
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modprobe configfs
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mountpoint -q /sys/kernel/config
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if [ "$?" -ne "0" ]; then
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mount -t configfs configfs /sys/kernel/config
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fi
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cd $ptestdir/tests
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./$testbin -v --gpio-class @mountpoint@ --chown-user gpio-test > ./$testbin.out 2>&1
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if [ $? -ne 0 ]; then
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echo "FAIL: $testbin"
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else
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echo "PASS: $testbin"
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fi
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