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/Documentation/devicetree/bindings/leds/
Dcommon.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/leds/common.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Common leds properties
10 - Jacek Anaszewski <jacek.anaszewski@gmail.com>
11 - Pavel Machek <pavel@ucw.cz>
25 led-sources:
30 $ref: /schemas/types.yaml#/definitions/uint32-array
35 from the header include/dt-bindings/leds/common.h. If there is no
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Dregulator-led.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/regulator-led.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Regulator LEDs
10 - Linus Walleij <linus.walleij@linaro.org>
13 Regulator LEDs are powered by a single regulator such that they can
20 - $ref: common.yaml#
24 pattern: '^led.*$'
27 const: regulator-led
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Dregister-bit-led.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/register-bit-led.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Register Bit LEDs
10 - Linus Walleij <linus.walleij@linaro.org>
13 Register bit leds are used with syscon multifunctional devices where single
14 bits in a certain register can turn on/off a single LED. The register bit LEDs
20 - $ref: /schemas/leds/common.yaml#
25 The unit-address is in the form of @<reg addr>,<bit offset>
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Dleds-qcom-lpg.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/leds-qcom-lpg.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Bjorn Andersson <bjorn.andersson@linaro.org>
20 - enum:
21 - qcom,pm660l-lpg
22 - qcom,pm8150b-lpg
23 - qcom,pm8150l-lpg
24 - qcom,pm8350c-pwm
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/Documentation/ABI/testing/
Dsysfs-class-led-trigger-pattern1 What: /sys/class/leds/<led>/pattern
5 Specify a software pattern for the LED, that supports altering
9 The pattern is given by a series of tuples, of brightness and
13 Documentation/devicetree/bindings/leds/leds-trigger-pattern.txt
15 What: /sys/class/leds/<led>/hr_pattern
18 Specify a software pattern for the LED, that supports altering
22 Unlike the /sys/class/leds/<led>/pattern, this attribute runs
23 a pattern on high-resolution timer (hrtimer).
25 What: /sys/class/leds/<led>/hw_pattern
29 Specify a hardware pattern for the LED, for LED hardware that
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/Documentation/leds/
Dleds-qcom-lpg.rst1 .. SPDX-License-Identifier: GPL-2.0
8 -----------
11 number of PWM channels, a programmable pattern lookup table and a RGB LED
15 individual LEDs, grouped together as RGB LEDs or otherwise be accessed as PWM
23 deeper idle states the LPG provides pattern support. This consists of a shared
25 range within the table to use, the rate and if the pattern should repeat.
27 The pattern for a channel can be programmed using the "pattern" trigger, using
30 /sys/class/leds/<led>/hw_pattern
31 --------------------------------
33 Specify a hardware pattern for a Qualcomm LPG LED.
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Dleds-mt6370-rgb.rst1 .. SPDX-License-Identifier: GPL-2.0
8 -----------
10 The MT6370 integrates a four-channel RGB LED driver, designed to provide a
12 includes a smart LED string controller and it can drive 3 channels of LEDs with
14 current up to 6mA. It provides three operation modes for RGB LEDs:
15 PWM Dimming mode, breath pattern mode, and constant current mode. The device
18 The breath pattern for a channel can be programmed using the "pattern" trigger,
21 /sys/class/leds/<led>/hw_pattern
22 --------------------------------
24 Specify a hardware breath pattern for a MT6370 RGB LED.
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/Documentation/admin-guide/laptops/
Dthinkpad-acpi.rst9 - Borislav Deianov <borislav@users.sf.net>
10 - Henrique de Moraes Holschuh <hmh@hmh.eng.br>
12 http://ibm-acpi.sf.net/
19 This driver used to be named ibm-acpi until kernel 2.6.21 and release
20 0.13-20070314. It used to be in the drivers/acpi tree, but it was
21 moved to the drivers/misc tree and renamed to thinkpad-acpi for kernel
25 The driver is named "thinkpad-acpi". In some places, like module
29 "tpacpi" is used as a shorthand where "thinkpad-acpi" would be too
33 ------
38 - Fn key combinations
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/Documentation/admin-guide/
Dkernel-parameters.txt16 force -- enable ACPI if default was off
17 on -- enable ACPI but allow fallback to DT [arm64,riscv64]
18 off -- disable ACPI if default was on
19 noirq -- do not use ACPI for IRQ routing
20 strict -- Be less tolerant of platforms that are not
22 rsdt -- prefer RSDT over (default) XSDT
23 copy_dsdt -- copy DSDT to memory
24 nospcr -- disable console in ACPI SPCR table as
41 If set to vendor, prefer vendor-specific driver
73 Documentation/firmware-guide/acpi/debug.rst for more information about
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