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/Documentation/devicetree/bindings/leds/backlight/
Dled-backlight.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/led-backlight.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: led-backlight
10 - Lee Jones <lee@kernel.org>
11 - Daniel Thompson <daniel.thompson@linaro.org>
12 - Jingoo Han <jingoohan1@gmail.com>
15 This binding is used to describe a basic backlight device made of LEDs. It
16 can also be used to describe a backlight device controlled by the output of
[all …]
Darcxcnn_bl.txt1 Binding for ArcticSand arc2c0608 LED driver
4 - compatible: should be "arc,arc2c0608"
5 - reg: slave address
8 - default-brightness: brightness value on boot, value from: 0-4095
9 - label: The name of the backlight device
11 - led-sources: List of enabled channels from 0 to 5.
14 - arc,led-config-0: setting for register ILED_CONFIG_0
15 - arc,led-config-1: setting for register ILED_CONFIG_1
16 - arc,dim-freq: PWM mode frequence setting (bits [3:0] used)
17 - arc,comp-config: setting for register CONFIG_COMP
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Dcommon.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/common.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Common backlight properties
10 - Lee Jones <lee@kernel.org>
11 - Daniel Thompson <daniel.thompson@linaro.org>
12 - Jingoo Han <jingoohan1@gmail.com>
15 Backlight devices provide backlight for different types of graphical
17 LED powered by a boost converter.
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Dkinetic,ktz8866.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/kinetic,ktz8866.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Kinetic Technologies KTZ8866 backlight
10 - Jianhua Lu <lujianhua000@gmail.com>
13 The Kinetic Technologies KTZ8866 is a high efficiency 6-channels-current-sinks
14 led backlight with dual lcd bias power.
15 https://www.kinet-ic.com/ktz8866/
18 - $ref: common.yaml#
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Dsky81452-backlight.txt1 SKY81452-backlight bindings
4 - compatible : Must be "skyworks,sky81452-backlight"
7 - name : Name of backlight device. Default is 'lcd-backlight'.
8 - gpios : GPIO to use to EN pin.
10 - led-sources : List of enabled channels from 0 to 5.
12 - skyworks,ignore-pwm : Ignore both PWM input
13 - skyworks,dpwm-mode : Enable DPWM dimming mode, otherwise Analog dimming.
14 - skyworks,phase-shift : Enable phase shift mode
15 - skyworks,short-detection-threshold-volt
17 - skyworks,current-limit-mA
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Dlm3630a-backlight.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/lm3630a-backlight.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: TI LM3630A High-Efficiency Dual-String White LED
10 - Lee Jones <lee@kernel.org>
11 - Daniel Thompson <daniel.thompson@linaro.org>
12 - Jingoo Han <jingoohan1@gmail.com>
15 The LM3630A is a current-mode boost converter which supplies the power and
26 '#address-cells':
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Dti,lm3509.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/ti,lm3509.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: TI LM3509 High Efficiency Boost for White LED's and/or OLED Displays
10 - Patrick Gansterer <paroga@paroga.com>
23 "#address-cells":
26 "#size-cells":
29 reset-gpios:
32 ti,brightness-rate-of-change-us:
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Drichtek,rt4831-backlight.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/richtek,rt4831-backlight.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Richtek RT4831 Backlight
10 - ChiYuan Huang <cy_huang@richtek.com>
14 and LCD backlight.
16 For the LCD backlight, it can provide four channel WLED driving capability.
20 https://www.richtek.com/assets/product_file/RT4831A/DS4831A-05.pdf
23 - $ref: common.yaml#
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Dkinetic,ktd253.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/kinetic,ktd253.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Kinetic Technologies KTD253 and KTD259 one-wire backlight
10 - Linus Walleij <linus.walleij@linaro.org>
13 The Kinetic Technologies KTD253 and KTD259 are white LED backlights
14 controlled by a single GPIO line. If you just turn on the backlight
15 it goes to maximum backlight then you can set the level of backlight
20 - $ref: common.yaml#
[all …]
Dkinetic,ktd2801.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/kinetic,ktd2801.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Kinetic Technologies KTD2801 one-wire backlight
10 - Duje Mihanović <duje.mihanovic@skole.hr>
13 The Kinetic Technologies KTD2801 is a LED backlight driver controlled
15 or by pulsing the GPIO line to set the backlight level. This is called
19 - $ref: common.yaml#
25 ctrl-gpios:
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Dmediatek,mt6370-backlight.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/mediatek,mt6370-backlight.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: MediaTek MT6370 Backlight
10 - ChiaEn Wu <chiaen_wu@richtek.com>
14 The MT6370 Backlight WLED driver supports up to a 29V output voltage for
21 - $ref: common.yaml#
26 - mediatek,mt6370-backlight
27 - mediatek,mt6372-backlight
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/Documentation/devicetree/bindings/mfd/
Dti-lmu.txt6 ------ ---------------------------------
7 LM3631 Backlight and regulator
8 LM3632 Backlight and regulator
9 LM3633 Backlight, LED and fault monitor
10 LM3695 Backlight
11 LM36274 Backlight and regulator
14 - compatible: Should be one of:
20 - reg: I2C slave address.
28 - enable-gpios: A GPIO specifier for hardware enable pin.
29 - ramp-up-us: Current ramping from one brightness level to
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Dmediatek,mt6370.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - ChiYuan Huang <cy_huang@richtek.com>
13 MT6370 is a highly-integrated smart power management IC, which includes a
14 single cell Li-Ion/Li-Polymer switching battery charger, a USB Type-C &
15 Power Delivery (PD) controller, dual flash LED current sources, a RGB LED
16 driver, a backlight WLED driver, a display bias driver and a general LDO for
26 wakeup-source: true
31 interrupt-controller: true
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Dsky81452.txt4 - compatible : Must be "skyworks,sky81452"
5 - reg : I2C slave address
8 - backlight : container node for backlight following the binding
9 in leds/backlight/sky81452-backlight.txt
10 - regulator : container node for regulators following the binding
11 in regulator/sky81452-regulator.txt
19 backlight {
20 compatible = "skyworks,sky81452-backlight";
21 name = "pwm-backlight";
22 led-sources = <0 1 2 3 6>;
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D88pm860x.txt4 - compatible : "marvell,88pm860x"
5 - reg : the I2C slave address for the 88pm860x chip
6 - interrupts : IRQ line for the 88pm860x chip
7 - interrupt-controller: describes the 88pm860x as an interrupt controller (has its own domain)
8 - #interrupt-cells : should be 1.
9 - The cell is the 88pm860x local IRQ number
12 - marvell,88pm860x-irq-read-clr: inicates whether interrupt status is cleared by read
13 - marvell,88pm860x-slave-addr: 88pm860x are two chips solution. <reg> stores the I2C address
17 88pm860x consists of a large and varied group of sub-devices:
20 ------ ------------ -----------
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/Documentation/devicetree/bindings/chrome/
Dgoogle,cros-kbd-led-backlight.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/chrome/google,cros-kbd-led-backlight.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: ChromeOS keyboard backlight LED driver.
10 - Tzung-Bi Shih <tzungbi@kernel.org>
14 const: google,cros-kbd-led-backlight
17 - compatible
22 - |
24 #address-cells = <1>;
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/Documentation/devicetree/bindings/leds/
Dleds-lm36274.txt1 * Texas Instruments LM36274 4-Channel LCD Backlight Driver w/Integrated Bias
3 The LM36274 is an integrated four-channel WLED driver and LCD bias supply.
4 The backlight boost provides the power to bias four parallel LED strings with
5 up to 29V total output voltage. The 11-bit LED current is programmable via
9 Documentation/devicetree/bindings/mfd/ti-lmu.txt
12 Documentation/devicetree/bindings/regulator/lm363x-regulator.txt
14 Required backlight properties:
15 - compatible:
16 "ti,lm36274-backlight"
17 - reg : 0
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Dleds-lm3697.txt1 * Texas Instruments - LM3697 Highly Efficient White LED Driver
3 The LM3697 11-bit LED driver provides high-
4 performance backlight dimming for 1, 2, or 3 series
5 LED strings while delivering up to 90% efficiency.
10 - compatible:
12 - reg : I2C slave address
13 - #address-cells : 1
14 - #size-cells : 0
17 - enable-gpios : GPIO pin to enable/disable the device
18 - vled-supply : LED supply
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Dqcom,pm8058-led.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/leds/qcom,pm8058-led.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Qualcomm PM8058 PMIC LED
10 - Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
13 The Qualcomm PM8058 contains an LED block for up to six LEDs:: three normal
14 LEDs, two "flash" LEDs and one "keypad backlight" LED. The names are quoted
15 because sometimes these LED drivers are used for wildly different things than
16 flash or keypad backlight:: their names are more of a suggestion than a
[all …]
Dleds-lm3532.txt1 * Texas Instruments - lm3532 White LED driver with ambient light sensing
4 The LM3532 provides the 3 high-voltage, low-side current sinks. The device is
5 programmable over an I2C-compatible interface and has independent
7 method allows for different LED currents in each current sink thus allowing
8 for a wide variety of backlight and keypad applications.
11 each with 32 internal voltage setting resistors, 8-bit logarithmic and linear
16 - compatible : "ti,lm3532"
17 - reg : I2C slave address
18 - #address-cells : 1
19 - #size-cells : 0
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Dleds-lp8860.txt1 * Texas Instruments - lp8860 4-Channel LED Driver
3 The LP8860-Q1 is an high-efficiency LED
4 driver with boost controller. It has 4 high-precision
9 - compatible :
11 - reg : I2C slave address
12 - #address-cells : 1
13 - #size-cells : 0
16 - enable-gpios : gpio pin to enable (active high)/disable the device.
17 - vled-supply : LED supply
20 - reg : 0
[all …]
/Documentation/admin-guide/laptops/
Dlg-laptop.rst1 .. SPDX-License-Identifier: GPL-2.0+
7 By Matan Ziv-Av <matan@svgalib.org>
11 -------
15 - FN-F1 (LG control panel) - Generates F15
16 - FN-F5 (Touchpad toggle) - Generates F21
17 - FN-F6 (Airplane mode) - Generates RFKILL
18 - FN-F9 (Reader mode) - Generates F14
24 -----------
26 Writing 0/1 to /sys/devices/platform/lg-laptop/reader_mode disables/enables
28 and the reader mode indicator LED (on F9 key) turns on.
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/Documentation/ABI/testing/
Dsysfs-class-led1 What: /sys/class/leds/<led>/brightness
6 Set the brightness of the LED.
9 just be turned on for non-zero brightness settings.
15 each color LED intensity is set to.
17 The percentage is calculated for each grouped LED via
23 Documentation/leds/leds-class-multicolor.rst.
26 /sys/class/leds/<led>/max_brightness.
30 Writing non-zero to this file while trigger is active changes the
35 What: /sys/class/leds/<led>/max_brightness
40 Maximum brightness level for this LED, default is 255 (LED_FULL).
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Dsysfs-class-backlight-lm36391 sysfs interface for Texas Instruments lm3639 backlight + flash led driver chip
2 ------------------------------------------------------------------------------
4 What: /sys/class/backlight/<backlight>/bled_mode
7 Contact: dri-devel@lists.freedesktop.org
9 (WO) Write to the backlight mapping mode. The backlight current
/Documentation/leds/
Dwell-known-leds.txt1 -*- org -*-
4 userland. LED devices have one problem there, and that is naming of
6 just know right "name" for given LED function, but situation got more
17 Notice there's a list of functions in include/dt-bindings/leds/common.h .
24 player. For example, a game controller with 4 LEDs, may be programmed with "x---"
25 to indicate player 1, "-x--" to indicate player 2 etcetera where "x" means on.
26 Input drivers can utilize the LED class to expose the individual player LEDs
31 Good: "input*:*:player-{1,2,3,4,5}
38 Legacy: "shift-key-light" (Motorola Droid 4, capslock)
45 Frontlight/backlight of main keyboard.
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