Searched full:brightness (Results 1 – 25 of 88) sorted by relevance
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| /Documentation/devicetree/bindings/leds/backlight/ |
| D | common.yaml | 20 default-brightness:
22 The default brightness that should be applied to the LED by the operating
23 system on start-up. The brightness should not exceed the brightness the
27 max-brightness:
29 Normally the maximum brightness is determined by the hardware and this
31 on the brightness apart from what the driver says, as it could happen
36 brightness-levels:
38 Array of distinct brightness levels. The levels must be in the range
42 The 0 value means a 0% of brightness (darkest/off), while the last value
43 in the array represents a full 100% brightness (brightest).
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| D | pwm-backlight.yaml | 47 Number of interpolated steps between each value of brightness-levels
49 having to list out every possible value in the brightness-level array.
53 default-brightness-level: [brightness-levels]
54 num-interpolated-steps: [brightness-levels]
68 brightness-levels = <0 4 8 16 32 64 128 255>;
69 default-brightness-level = <6>;
83 brightness-levels = <0 2048 4096 8192 16384 65535>;
85 default-brightness-level = <4096>;
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| D | ti,lm3509.yaml | 32 ti,brightness-rate-of-change-us:
33 description: Brightness Rate of Change in microseconds.
66 default-brightness:
71 max-brightness:
100 ti,brightness-rate-of-change-us = <52000>;
109 default-brightness = <12>;
110 max-brightness = <31>;
128 default-brightness = <12>;
133 default-brightness = <15>;
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| D | lm3630a-backlight.yaml | 70 default-brightness:
71 description: Default brightness level on boot.
75 max-brightness:
76 description: Maximum brightness that is allowed during runtime.
113 default-brightness = <200>;
114 max-brightness = <255>;
132 default-brightness = <150>;
138 default-brightness = <225>;
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| D | mediatek,mt6370-backlight.yaml | 29 default-brightness:
32 max-brightness:
79 Enable the exponential mode of backlight brightness. If this property
103 default-brightness:
106 max-brightness:
111 default-brightness:
114 max-brightness:
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| D | kinetic,ktd2801.yaml | 28 default-brightness: true
29 max-brightness: true
44 max-brightness = <210>;
45 default-brightness = <100>;
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| D | qcom-wled.yaml | 33 default-brightness:
35 brightness value on boot.
39 max-brightness:
41 Maximum brightness level.
146 Selects the modulator used for brightness modulation.
157 Selects the CABC pin signal used for brightness modulation.
224 default-brightness:
228 max-brightness:
234 default-brightness:
238 max-brightness:
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| D | arcxcnn_bl.txt | 8 - default-brightness: brightness value on boot, value from: 0-4095
28 default-brightness = <500>;
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| /Documentation/ABI/testing/ |
| D | sysfs-class-led | 1 What: /sys/class/leds/<led>/brightness
6 Set the brightness of the LED.
8 Most LEDs don't have hardware brightness support, so will
9 just be turned on for non-zero brightness settings.
20 led_brightness = brightness * multi_intensity/max_brightness
31 top brightness trigger is going to use.
40 Maximum brightness level for this LED, default is 255 (LED_FULL).
42 If the LED does not support different brightness levels, this
49 Last hardware set brightness level for this LED. Some LEDs
55 the brightness.
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| D | sysfs-class-led-trigger-pattern | 6 the brightness for the specified duration with one software
7 timer. It can do gradual dimming and step change of brightness.
9 The pattern is given by a series of tuples, of brightness and
19 the brightness for the specified duration with one software
20 timer. It can do gradual dimming and step change of brightness.
30 supports autonomously controlling brightness over time, according
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| D | sysfs-class-backlight | 6 Description of the scale of the brightness curve.
8 The human eye senses brightness approximately logarithmically,
9 hence linear changes in brightness are perceived as being
10 non-linear. To achieve a linear perception of brightness changes
12 backlights with a linear brightness curve.
17 The scale of the brightness curve is unknown.
20 The brightness changes linearly with each step. Brightness
25 The brightness changes non-linearly with each step. Brightness
43 brightness).
56 (RW) Read or write the specific brightness level at which the
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| /Documentation/leds/ |
| D | leds-lm3556.rst | 26 LM3556 Flash can be controlled through /sys/class/leds/flash/brightness file
28 * if STROBE pin is enabled, below example control brightness only, and
35 #echo 0 > /sys/class/leds/flash/brightness
39 #echo 1 > /sys/class/leds/flash/brightness
45 #echo 16 > /sys/class/leds/flash/brightness
54 LM3556 torch can be controlled through /sys/class/leds/torch/brightness file.
55 * if TORCH pin is enabled, below example control brightness only,
62 #echo 0 > /sys/class/leds/torch/brightness
66 #echo 1 > /sys/class/leds/torch/brightness
72 #echo 8 > /sys/class/leds/torch/brightness
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| D | leds-class-multicolor.rst | 12 via brightness file.
35 -rw-r--r-- 1 root root 4096 Oct 19 16:16 brightness
40 Multicolor Class Brightness Control
42 The brightness level for each LED is calculated based on the color LED
44 the requested brightness.
46 led_brightness = brightness * multi_intensity/max_brightness
49 A user first writes the multi_intensity file with the brightness levels
68 The user can control the brightness of that multicolor LED group by writing the
69 global 'brightness' control. Assuming a max_brightness of 255 the user
71 128 to the global brightness file then the values written to each LED will be
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| D | leds-cht-wcove.rst | 31 The set pattern only controls the timing. For max brightness the last
32 set brightness is used and the max brightness can be changed
33 while breathing by writing the brightness attribute.
36 for both sw and hw blinking the brightness can also be changed
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| D | leds-blinkm.rst | 26 …brightness device max_brightness multi_index multi_intensity power subsystem trigger uevent
29 the brightness file.
38 brightness file.
49 brightness device max_brightness power subsystem trigger uevent
52 brightness device max_brightness power subsystem trigger uevent
55 brightness device max_brightness power subsystem trigger uevent
64 $ cat blinkm-6-9-blue/brightness
67 $ echo 200 > blinkm-6-9-blue/brightness
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| D | leds-mt6370-rgb.rst | 16 can increase or decrease the brightness of the RGB LED via an I2C interface.
27 milliseconds. And the brightness is controlled by
28 '/sys/class/leds/<led>/brightness'. The pattern doesn't include the brightness
30 depending on the current brightness setting.
34 "0 Tr1 0 Tr2 0 Tf1 0 Tf2 0 Ton 0 Toff" --> '0' for dummy brightness code
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| D | leds-class.rst | 6 userspace. LEDs appear in /sys/class/leds/. The maximum brightness of the
7 LED is defined in max_brightness file. The brightness file will set the brightness
9 brightness support so will just be turned on for non-zero brightness settings.
20 The timer trigger will periodically change the LED brightness between
21 LED_OFF and the current brightness setting. The "on" and "off" time can
23 You can change the brightness value of a LED independently of the timer
24 trigger. However, if you set the brightness value to LED_OFF it will
119 Brightness setting API
122 LED subsystem core exposes following API for setting brightness:
144 If the driver can detect hardware initiated brightness changes and thus
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| D | uleds.rst | 26 The current brightness is found by reading a single byte from the character
27 device. Values are unsigned: 0 to 255. Reading will block until the brightness
28 changes. The device node can also be polled to notify when the brightness value
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| /Documentation/devicetree/bindings/leds/ |
| D | leds-trigger-pattern.txt | 3 The pattern is given by a series of tuples, of brightness and duration (ms).
4 The LED is expected to traverse the series and each brightness value for the
5 specified duration. Duration of 0 means brightness should immediately change to
10 change of brightness, i.e. the subsequent brightness will be applied without
22 LED brightness
31 2. To make the LED go instantly from one brightness value to another, we should
32 use zero-time lengths (the brightness must be same as the previous tuple's). So
39 It will make the LED stay off for one second, then stay at max brightness for
42 LED brightness
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| D | leds-netxbig.txt | 18 - bright-addr: Brightness register address on gpio-ext bus.
19 - max-brightness: Maximum brightness value.
43 max-brightness = <7>;
52 max-brightness = <7>;
62 max-brightness = <7>;
71 max-brightness = <7>;
81 max-brightness = <7>;
90 max-brightness = <7>;
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| D | leds-pwm.yaml | 32 max-brightness:
34 Maximum brightness possible for the LED
39 - max-brightness
54 max-brightness = <127>;
61 max-brightness = <255>;
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| /Documentation/ABI/stable/ |
| D | sysfs-class-backlight | 13 What: /sys/class/backlight/<backlight>/brightness
18 Control the brightness for this <backlight>. Values
20 show the brightness level stored in the driver, which
21 may not be the actual brightness (see actual_brightness).
29 Show the actual brightness by querying the hardware.
37 Maximum brightness for <backlight>.
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| /Documentation/firmware-guide/acpi/ |
| D | video_extension.rst | 32 get the brightness level the firmware thinks it is at;
34 not implemented, will set the current brightness instead;
35 brightness:
36 on write, control method _BCM will run to set the requested brightness level;
43 brightness, actual_brightness and max_brightness. So if we have
68 corresponds to the 0x0A brightness value) to 9 (that corresponds to the
69 0x64 brightness value) inclusive. Each of those index values is regarded
70 as a "brightness level" indicator. Thus from the user space perspective
71 the range of available brightness levels is from 0 to 9 (max_brightness)
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| /Documentation/devicetree/bindings/mfd/ |
| D | ti-lmu.txt | 29 - ramp-up-us: Current ramping from one brightness level to
30 the a higher brightness level.
32 - ramp-down-us: Current ramping from one brightness level to
33 the a lower brightness level.
35 - ti,brightness-resolution - This determines whether to use 8 bit brightness
36 mode or 11 bit brightness mode. If this value is
38 8bit brightness mode per 7.3.4.1 of the data
42 have a common brightness register or individual
43 brightness registers.
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| /Documentation/driver-api/backlight/ |
| D | lp855x-driver.rst | 17 * Brightness control
19 Brightness can be controlled by the pwm input or the i2c command.
46 Initial value of backlight brightness.
49 Only valid when brightness is pwm input mode.
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