Based on kernel version 6.8. Page generated on 2024-03-11 21:26 EST.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 | What: /sys/class/backlight/<backlight>/scale Date: July 2019 KernelVersion: 5.4 Contact: Daniel Thompson <daniel.thompson@linaro.org> Description: Description of the scale of the brightness curve. The human eye senses brightness approximately logarithmically, hence linear changes in brightness are perceived as being non-linear. To achieve a linear perception of brightness changes controls like sliders need to apply a logarithmic mapping for backlights with a linear brightness curve. Possible values of the attribute are: unknown The scale of the brightness curve is unknown. linear The brightness changes linearly with each step. Brightness controls should apply a logarithmic mapping for a linear perception. non-linear The brightness changes non-linearly with each step. Brightness controls should use a linear mapping for a linear perception. What: /sys/class/backlight/<backlight>/ambient_light_level Date: Apr, 2010 KernelVersion: v2.6.35 Contact: Michael Hennerich <michael.hennerich@analog.com> Description: (RO) Get conversion value of the light sensor. The value is automatically updated every 80 ms when the light sensor is enabled. The value range is device-driver specific: For ADP8870: It returns integer between 0 (dark) and 8000 (max ambient brightness). For ADP8860: It returns a 13-bits integer. What: /sys/class/backlight/<backlight>/ambient_light_zone Date: Apr, 2010 KernelVersion: v2.6.35 Contact: Michael Hennerich <michael.hennerich@analog.com>, device-drivers-devel@blackfin.uclinux.org Description: (RW) Read or write the specific brightness level at which the backlight operates. The value meaning is device-driver specific: For ADP8860: == ========================== 0 Off: Backlight set to 0 mA 1 Level 1: daylight 2 Level 2: bright 3 Level 3: dark == ========================== For ADP8870: == ========================== 0 Off: Backlight set to 0 mA 1 Level 1: daylight 2 Level 2: bright 3 Level 3: office 4 Level 4: indoor 5 Level 5: dark == ========================== Writing 0 returns to normal/automatic ambient light level operation. It can be enabled by writing the value stored in /sys/class/backlight/<backlight>/max_brightness to /sys/class/backlight/<backlight>/brightness. What: /sys/class/backlight/<backlight>/<ambient light zone>_max Date: Sep, 2009 KernelVersion: v2.6.32 Contact: device-drivers-devel@blackfin.uclinux.org Description: Control the maximum brightness for <ambient light zone> on this <backlight>. Values are between 0 and 127. This file will also show the brightness level stored for this <ambient light zone>. The <ambient light zone> is device-driver specific: For ADP5520 and ADP5501, <ambient light zone> can be: =========== ================================================ Ambient sysfs entry light zone =========== ================================================ daylight /sys/class/backlight/<backlight>/daylight_max office /sys/class/backlight/<backlight>/office_max dark /sys/class/backlight/<backlight>/dark_max =========== ================================================ For ADP8860, <ambient light zone> can be: =========== ================================================ Ambient sysfs entry light zone =========== ================================================ l1_daylight /sys/class/backlight/<backlight>/l1_daylight_max l2_office /sys/class/backlight/<backlight>/l2_office_max l3_dark /sys/class/backlight/<backlight>/l3_dark_max =========== ================================================ For ADP8870, <ambient light zone> can be: =========== ================================================ Ambient sysfs entry light zone =========== ================================================ l1_daylight /sys/class/backlight/<backlight>/l1_daylight_max l2_bright /sys/class/backlight/<backlight>/l2_bright_max l3_office /sys/class/backlight/<backlight>/l3_office_max l4_indoor /sys/class/backlight/<backlight>/l4_indoor_max l5_dark /sys/class/backlight/<backlight>/l5_dark_max =========== ================================================ See also: /sys/class/backlight/<backlight>/ambient_light_zone. What: /sys/class/backlight/<backlight>/<ambient light zone>_dim Date: Sep, 2009 KernelVersion: v2.6.32 Contact: device-drivers-devel@blackfin.uclinux.org Description: Control the dim brightness for <ambient light zone> on this <backlight>. Values are between 0 and 127, typically set to 0. Full off when the backlight is disabled. This file will also show the dim brightness level stored for this <ambient light zone>. The <ambient light zone> is device-driver specific: For ADP5520 and ADP5501, <ambient light zone> can be: =========== ================================================ Ambient sysfs entry light zone =========== ================================================ daylight /sys/class/backlight/<backlight>/daylight_dim office /sys/class/backlight/<backlight>/office_dim dark /sys/class/backlight/<backlight>/dark_dim =========== ================================================ For ADP8860, <ambient light zone> can be: =========== ================================================ Ambient sysfs entry light zone =========== ================================================ l1_daylight /sys/class/backlight/<backlight>/l1_daylight_dim l2_office /sys/class/backlight/<backlight>/l2_office_dim l3_dark /sys/class/backlight/<backlight>/l3_dark_dim =========== ================================================ For ADP8870, <ambient light zone> can be: =========== ================================================ Ambient sysfs entry light zone =========== ================================================ l1_daylight /sys/class/backlight/<backlight>/l1_daylight_dim l2_bright /sys/class/backlight/<backlight>/l2_bright_dim l3_office /sys/class/backlight/<backlight>/l3_office_dim l4_indoor /sys/class/backlight/<backlight>/l4_indoor_dim l5_dark /sys/class/backlight/<backlight>/l5_dark_dim =========== ================================================ See also: /sys/class/backlight/<backlight>/ambient_light_zone. |