tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
extcon: fix typos in sys-class-extcon
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
authored by
Peter Meerwald
and committed by
Greg Kroah-Hartman
f28d5a01
80732cc1
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Documentation/ABI/testing/sysfs-class-extcon
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Documentation/ABI/testing/sysfs-class-extcon
···
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accessory cables have such capability. For example,
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the 30-pin port of Nuri board (/arch/arm/mach-exynos)
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may have both HDMI and Charger attached, or analog audio,
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video, and USB cables attached simulteneously.
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video, and USB cables attached simultaneously.
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If there are cables mutually exclusive with each other,
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such binary relations may be expressed with extcon_dev's
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The /sys/class/extcon/.../state shows and stores the cable
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attach/detach information of the corresponding extcon object.
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If the extcon object has an optional callback "show_state"
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defined, the showing function is overriden with the optional
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defined, the showing function is overridden with the optional
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callback.
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If the default callback for showing function is used, the
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TA=1
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EAR_JACK=0
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#
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In this example, the extcon device have USB_OTG and TA
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In this example, the extcon device has USB_OTG and TA
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cables attached and HDMI and EAR_JACK cables detached.
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In order to update the state of an extcon device, enter a hex
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state number starting with 0x.
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echo 0xHEX > state
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state number starting with 0x:
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# echo 0xHEX > state
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This updates the whole state of the extcon dev.
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This updates the whole state of the extcon device.
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Inputs of all the methods are required to meet the
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mutually_exclusive contidions if they exist.
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mutually_exclusive conditions if they exist.
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It is recommended to use this "global" state interface if
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you need to enter the value atomically. The later state
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you need to set the value atomically. The later state
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interface associated with each cable cannot update
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multiple cable states of an extcon device simultaneously.
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···
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Date: February 2012
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Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
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Description:
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The /sys/class/extcon/.../cable.x/name shows and stores the
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The /sys/class/extcon/.../cable.x/state shows and stores the
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state of cable "x" (integer between 0 and 31) of an extcon
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device. The state value is either 0 (detached) or 1
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(attached).
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Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
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Description:
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Shows the relations of mutually exclusiveness. For example,
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if the mutually_exclusive array of extcon_dev is
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{0x3, 0x5, 0xC, 0x0}, the, the output is:
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if the mutually_exclusive array of extcon device is
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{0x3, 0x5, 0xC, 0x0}, then the output is:
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# ls mutually_exclusive/
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0x3
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0x5