1 What: /sys/class/extcon/.../
2 Date: February 2012
3 Contact: MyungJoo Ham <myungjoo.ham@sams
4 Description:
5 Provide a place in sysfs for t
6 This allows accessing extcon s
7 The name of extcon object deno
8 with extcon_dev_register.
9
10 One extcon device denotes a si
11 port. An external connector ma
12 attached simultaneously. Many
13 accessory cables have such cap
14 the 30-pin port of Nuri board
15 may have both HDMI and Charger
16 video, and USB cables attached
17
18 If there are cables mutually e
19 such binary relations may be e
20 mutually_exclusive array.
21
22 What: /sys/class/extcon/.../name
23 Date: February 2012
24 Contact: MyungJoo Ham <myungjoo.ham@sams
25 Description:
26 The /sys/class/extcon/.../name
27 object. If the extcon object h
28 "show_name" defined, the callb
29 this sysfs node.
30
31 What: /sys/class/extcon/.../state
32 Date: February 2012
33 Contact: MyungJoo Ham <myungjoo.ham@sams
34 Description:
35 The /sys/class/extcon/.../stat
36 attach/detach information of t
37 If the extcon object has an op
38 defined, the showing function
39 callback.
40
41 If the default callback for sh
42 format is like this::
43
44 # cat state
45 USB_OTG=1
46 HDMI=0
47 TA=1
48 EAR_JACK=0
49 #
50
51 In this example, the extcon de
52 cables attached and HDMI and E
53
54 In order to update the state o
55 state number starting with 0x:
56
57 # echo 0xHEX > state
58
59 This updates the whole state o
60 Inputs of all the methods are
61 mutually_exclusive conditions
62
63 It is recommended to use this
64 you need to set the value atom
65 interface associated with each
66 multiple cable states of an ex
67
68 What: /sys/class/extcon/.../cable.X/
69 Date: February 2012
70 Contact: MyungJoo Ham <myungjoo.ham@sams
71 Description:
72 The /sys/class/extcon/.../cabl
73 "X" (integer between 0 and 31)
74
75 What: /sys/class/extcon/.../cable.X/
76 Date: February 2012
77 Contact: MyungJoo Ham <myungjoo.ham@sams
78 Description:
79 The /sys/class/extcon/.../cabl
80 state of cable "X" (integer be
81 device. The state value is eit
82 (attached).
83
84 What: /sys/class/extcon/.../mutually
85 Date: December 2011
86 Contact: MyungJoo Ham <myungjoo.ham@sams
87 Description:
88 Shows the relations of mutuall
89 if the mutually_exclusive arra
90 {0x3, 0x5, 0xC, 0x0}, then the
91
92 # ls mutually_exclusive/
93 0x3
94 0x5
95 0xc
96 #
97
98 Note that mutually_exclusive i
99 device and the file names unde
100 directory show the mutually-ex
101 of the files.
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