The Linux Kernel
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GPIO
Character Device Userspace API
Obsolete Userspace APIs
Character Device Userspace API (v1)
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Linux Media Infrastructure userspace API
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Translations
The Linux Kernel
The Linux kernel user-space API guide
GPIO
Obsolete GPIO Userspace APIs
View page source
Obsolete GPIO Userspace APIs
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Character Device Userspace API (v1)
Sysfs Interface