threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
27 lines
653 B
Plaintext
27 lines
653 B
Plaintext
What: /dev/gpiochip[0-9]+
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Date: November 2015
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KernelVersion: 4.4
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Contact: linux-gpio@vger.kernel.org
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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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