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27 lines
666 B
27 lines
666 B
What: /dev/gpiochip[0-9]+ |
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Date: November 2015 |
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KernelVersion: 4.4 |
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Contact: [email protected] |
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Description: |
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The character device files /dev/gpiochip* are the interface |
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between GPIO chips and userspace. |
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The ioctl(2)-based ABI is defined and documented in |
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[include/uapi]<linux/gpio.h>. |
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The following file operations are supported: |
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open(2) |
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Currently the only useful flags are O_RDWR. |
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ioctl(2) |
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Initiate various actions. |
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See the inline documentation in [include/uapi]<linux/gpio.h> |
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for descriptions of all ioctls. |
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close(2) |
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Stops and free up the I/O contexts that was associated |
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with the file descriptor. |
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Users: TBD
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