1 What: /sys/class/backlight/<backligh
2 Date: July 2019
3 KernelVersion: 5.4
4 Contact: Daniel Thompson <daniel.thompso
5 Description:
6 Description of the scale of th
7
8 The human eye senses brightnes
9 hence linear changes in bright
10 non-linear. To achieve a linea
11 controls like sliders need to
12 backlights with a linear brigh
13
14 Possible values of the attribu
15
16 unknown
17 The scale of the brightness
18
19 linear
20 The brightness changes linea
21 controls should apply a loga
22 perception.
23
24 non-linear
25 The brightness changes non-l
26 controls should use a linear
27
28 What: /sys/class/backlight/<backligh
29 Date: Apr, 2010
30 KernelVersion: v2.6.35
31 Contact: Michael Hennerich <michael.henn
32 Description:
33 (RO) Get conversion value of t
34
35 The value is automatically upd
36 light sensor is enabled.
37
38 The value range is device-driv
39
40 For ADP8870:
41
42 It returns integer between 0
43 brightness).
44
45 For ADP8860:
46
47 It returns a 13-bits integer
48
49 What: /sys/class/backlight/<backligh
50 Date: Apr, 2010
51 KernelVersion: v2.6.35
52 Contact: Michael Hennerich <michael.henn
53 device-drivers-devel@blackfin.
54
55 Description:
56 (RW) Read or write the specifi
57 backlight operates.
58
59 The value meaning is device-dr
60
61 For ADP8860:
62
63 == ======================
64 0 Off: Backlight set to
65 1 Level 1: daylight
66 2 Level 2: bright
67 3 Level 3: dark
68 == ======================
69
70 For ADP8870:
71
72 == ======================
73 0 Off: Backlight set to
74 1 Level 1: daylight
75 2 Level 2: bright
76 3 Level 3: office
77 4 Level 4: indoor
78 5 Level 5: dark
79 == ======================
80
81 Writing 0 returns to normal/au
82 operation.
83
84 It can be enabled by writing t
85 /sys/class/backlight/<backligh
86 /sys/class/backlight/<backligh
87
88 What: /sys/class/backlight/<backligh
89 Date: Sep, 2009
90 KernelVersion: v2.6.32
91 Contact: device-drivers-devel@blackfin.
92 Description:
93 Control the maximum brightness
94 on this <backlight>. Values ar
95 will also show the brightness
96 <ambient light zone>.
97
98 The <ambient light zone> is de
99
100 For ADP5520 and ADP5501, <ambi
101
102 =========== =================
103 Ambient sysfs entry
104 light zone
105 =========== =================
106 daylight /sys/class/backli
107 office /sys/class/backli
108 dark /sys/class/backli
109 =========== =================
110
111 For ADP8860, <ambient light zo
112
113 =========== =================
114 Ambient sysfs entry
115 light zone
116 =========== =================
117 l1_daylight /sys/class/backli
118 l2_office /sys/class/backli
119 l3_dark /sys/class/backli
120 =========== =================
121
122 For ADP8870, <ambient light zo
123
124 =========== =================
125 Ambient sysfs entry
126 light zone
127 =========== =================
128 l1_daylight /sys/class/backli
129 l2_bright /sys/class/backli
130 l3_office /sys/class/backli
131 l4_indoor /sys/class/backli
132 l5_dark /sys/class/backli
133 =========== =================
134
135 See also: /sys/class/backlight
136
137 What: /sys/class/backlight/<backligh
138 Date: Sep, 2009
139 KernelVersion: v2.6.32
140 Contact: device-drivers-devel@blackfin.
141 Description:
142 Control the dim brightness for
143 on this <backlight>. Values ar
144 set to 0. Full off when the ba
145 This file will also show the d
146 this <ambient light zone>.
147
148 The <ambient light zone> is de
149
150 For ADP5520 and ADP5501, <ambi
151
152 =========== =================
153 Ambient sysfs entry
154 light zone
155 =========== =================
156 daylight /sys/class/backli
157 office /sys/class/backli
158 dark /sys/class/backli
159 =========== =================
160
161 For ADP8860, <ambient light zo
162
163 =========== =================
164 Ambient sysfs entry
165 light zone
166 =========== =================
167 l1_daylight /sys/class/backli
168 l2_office /sys/class/backli
169 l3_dark /sys/class/backli
170 =========== =================
171
172 For ADP8870, <ambient light zo
173
174 =========== =================
175 Ambient sysfs entry
176 light zone
177 =========== =================
178 l1_daylight /sys/class/backli
179 l2_bright /sys/class/backli
180 l3_office /sys/class/backli
181 l4_indoor /sys/class/backli
182 l5_dark /sys/class/backli
183 =========== =================
184
185 See also: /sys/class/backlight
186
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