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/freebsd/sys/contrib/device-tree/Bindings/leds/backlight/
H A Dpwm-backlight.txt1 pwm-backlight bindings
4 - compatible: "pwm-backlight"
5 - pwms: OF device-tree PWM specification (see PWM binding[0])
6 - power-supply: regulator for supply voltage
9 - pwm-names: a list of names for the PWM devices specified in the
10 "pwms" property (see PWM binding[0])
11 - enable-gpios: contains a single GPIO specifier for the GPIO which enables
12 and disables the backlight (see GPIO binding[1])
13 - post-pwm-on-delay-ms: Delay in ms between setting an initial (non-zero) PWM
14 and enabling the backlight using GPIO.
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H A Dpwm-backlight.yaml1 # SPDX-License-Identifier: GPL-2.0-only
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/pwm-backligh
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H A Dmediatek,mt6370-backlight.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/mediate
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H A Dlp855x-backlight.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/leds/backlight/lp855x-backlight.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Texas Instruments LP855X backlight controllers
10 - Artur Weber <aweber.kernel@gmail.com>
15 - ti,lp8550
16 - ti,lp8551
17 - ti,lp8552
18 - ti,lp8553
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H A 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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H A D88pm860x.txt1 88pm860x-backlight bindings
4 - marvell,88pm860x-iset: Current supplies on backlight device.
5 - marvell,88pm860x-pwm: PWM frequency on backlight device.
10 backlight-0 {
11 marvell,88pm860x-iset = <4>;
12 marvell,88pm860x-pwm = <3>;
14 backlight-2 {
H A Dlp855x.txt4 - compatible: "ti,lp8550", "ti,lp8551", "ti,lp8552", "ti,lp8553",
6 - reg: I2C slave address (u8)
7 - dev-ctrl: Value of DEVICE CONTROL register (u8). It depends on the device.
10 - bl-name: Backlight device name (string)
11 - init-brt: Initial value of backlight brightness (u8)
12 - pwm-period: PWM period value. Set only PWM input mode used (u32)
13 - rom-addr: Register address of ROM area to be updated (u8)
14 - rom-val: Register value to be updated (u8)
15 - power-supply: Regulator which controls the 3V rail
16 - enable-supply: Regulator which controls the EN/VDDIO input
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H A 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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/freebsd/sys/contrib/device-tree/Bindings/pwm/
H A Dpwm.txt1 Specifying PWM information for devices
4 1) PWM user nodes
5 -----------------
7 PWM users should specify a list of PWM devices that they want to use
8 with a property containing a 'pwm-list':
10 pwm-list ::= <single-pwm> [pwm-list]
11 single-pwm ::= <pwm-phandle> <pwm-specifier>
12 pwm-phandle : phandle to PWM controller node
13 pwm-specifier : array of #pwm-cells specifying the given PWM
16 PWM properties should be named "pwms". The exact meaning of each pwms
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H A Dpwm-lp3943.txt1 TI/National Semiconductor LP3943 PWM controller
4 - compatible: "ti,lp3943-pwm"
5 - #pwm-cells: Should be 2. See pwm.yaml in this directory for a
9 - ti,pwm0 or ti,pwm1: Output pin number(s) for PWM channel 0 or 1.
17 PWM 0 is for RGB LED brightness control
18 PWM 1 is for brightness control of LP8557 backlight device
26 * PWM 0 : output 8, 9 and 10
27 * PWM 1 : output 15
29 pwm3943: pwm {
30 compatible = "ti,lp3943-pwm";
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H A Dpxa-pwm.txt1 Marvell PWM controller
4 - compatible: should be one or more of:
5 - "marvell,pxa250-pwm"
6 - "marvell,pxa270-pwm"
7 - "marvell,pxa168-pwm"
8 - "marvell,pxa910-pwm"
9 - reg: Physical base address and length of the registers used by the PWM channel
10 Note that one device instance must be created for each PWM that is used, so the
11 length covers only the register window for one PWM output, not that of the
12 entire PWM controller. Currently length is 0x10 for all supported devices.
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H A Datmel,hlcdc-pwm.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/pwm/atmel,hlcdc-pwm.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Atmel's HLCDC's PWM controller
10 - Nicolas Ferre <nicolas.ferre@microchip.com>
11 - Alexandre Belloni <alexandre.belloni@bootlin.com>
12 - Claudiu Beznea <claudiu.beznea@tuxon.dev>
15 The LCDC integrates a Pulse Width Modulation (PWM) Controller. This block
17 display's contrast by software. LCDC_PWM is an 8-bit PWM signal that can be
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/freebsd/sys/contrib/device-tree/Bindings/mfd/
H A Dnetronix,ntxec.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jonathan Neuschäfer <j.neuschaefer@gmx.net>
13 This EC is found in e-book readers of multiple brands (e.g. Kobo, Tolino), and
22 - description: The I2C address of the EC
24 system-power-controller:
26 description: See Documentation/devicetree/bindings/power/power-controller.txt
33 "#pwm-cells":
36 Number of cells in a PWM specifier.
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H A 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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H A 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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/freebsd/sys/contrib/device-tree/src/arm/rockchip/
H A Drk3288-veyron-edp.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
9 backlight_regulator: backlight-regulator {
10 compatible = "regulator-fixed";
11 enable-active-high;
13 pinctrl-names = "default";
14 pinctrl-0 = <&bl_pwr_en>;
15 regulator-name = "backlight_regulator";
16 vin-supply = <&vcc33_sys>;
17 startup-delay-us = <15000>;
20 panel_regulator: panel-regulator {
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/freebsd/sys/contrib/device-tree/src/arm/allwinner/
H A Dsun4i-a10-topwise-a721.dts1 // SPDX-License-Identifier: GPL-2.0+
6 /dts-v1/;
7 #include "sun4i-a10.dtsi"
8 #include "sunxi-common-regulators.dtsi"
10 #include <dt-bindings/gpio/gpio.h>
11 #include <dt-bindings/input/input.h>
12 #include <dt-bindings/interrupt-controller/irq.h>
13 #include <dt-bindings/pwm/pwm.h>
17 compatible = "topwise,a721", "allwinner,sun4i-a10";
23 backlight: backlight { label
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H A Dsun5i-a13-empire-electronix-d709.dts4 * This file is dual-licensed: you can use it either under the terms
43 /dts-v1/;
44 #include "sun5i-a13.dtsi"
45 #include "sunxi-common-regulators.dtsi"
46 #include <dt-bindings/gpio/gpio.h>
47 #include <dt-bindings/input/input.h>
48 #include <dt-bindings/interrupt-controller/irq.h>
49 #include <dt-bindings/pwm/pwm.h>
53 compatible = "empire-electronix,d709", "allwinner,sun5i-a13";
59 backlight: backlight { label
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/freebsd/usr.sbin/pwm/
H A Dpwm.827 .Nm pwm
28 .Nd configure PWM (Pulse Width Modulation) hardware
42 utility can be used to configure pwm hardware.
47 Some PWM hardware supports multiple output channels within a single
50 instance controls a single PWM channel.
54 .Pa /dev/pwm/pwmcX.Y ,
62 .Bl -tag -width "-f device"
66 .Pa /dev/pwm/pwmc0.0
69 .Pa /dev/pwm
72 Show the configuration of the PWM channel.
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/freebsd/sys/contrib/device-tree/src/arm/nvidia/
H A Dtegra20-medcom-wide.dts1 // SPDX-License-Identifier: GPL-2.0
2 /dts-v1/;
4 #include "tegra20-tamonten.dtsi"
7 model = "Avionic Design Medcom-Wide board";
8 compatible = "ad,medcom-wide", "ad,tamonten", "nvidia,tegra20";
15 stdout-path = "serial0:115200n8";
27 pwm@7000a000 {
35 interrupt-parent = <&gpio>;
38 gpio-controller;
39 #gpio-cells = <2>;
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H A Dtegra30-colibri-eval-v3.dts1 // SPDX-License-Identifier: GPL-2.0
2 /dts-v1/;
4 #include <dt-bindings/input/input.h>
5 #include "tegra30-colibri.dtsi"
9 compatible = "toradex,colibri_t30-eval-v3", "toradex,colibri_t30",
22 stdout-path = "serial0:115200n8";
35 hdmi-suppl
129 backlight: backlight { global() label
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H A Dtegra20-colibri-iris.dts1 // SPDX-License-Identifier: GPL-2.0
2 /dts-v1/;
4 #include <dt-bindings/input/input.h>
5 #include "tegra20-colibri.dtsi"
9 compatible = "toradex,colibri_t20-iris", "toradex,colibri_t20",
22 stdout-path = "serial0:115200n8";
35 hdmi-supply = <&reg_5v0>;
41 bl-o
181 backlight: backlight { global() label
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/freebsd/sys/contrib/device-tree/src/arm/st/
H A Dstm32mp157c-lxa-mc1.dts1 /* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause) */
3 * Copyright (C) 2020 STMicroelectronics - All Rights Reserved
7 /dts-v1/;
10 #include "stm32mp15xx-osd32.dtsi"
11 #include "stm32mp15xxac-pinctrl.dtsi"
13 #include <dt-bindings/gpio/gpio.h>
14 #include <dt-bindings/pwm/pwm.h>
17 model = "Linux Automation MC-1 board";
18 compatible = "lxa,stm32mp157c-mc1", "oct,stm32mp15xx-osd32", "st,stm32mp157";
27 backlight: backlight { label
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/freebsd/sys/dev/pwm/
H A Dpwm_backlight.c1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
52 #include <dev/backlight/backlight.h>
54 #include <dev/pwm/ofw_pwm.h>
78 { "pwm-backlight", 1 },
86 if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data) in pwm_backlight_probe()
89 device_set_desc(dev, "PWM Backlight"); in pwm_backlight_probe()
103 rv = pwm_get_by_ofw_propidx(dev, node, "pwms", 0, &sc->channel); in pwm_backlight_attach()
105 device_printf(dev, "Cannot map pwm channel %d\n", rv); in pwm_backlight_attach()
109 if (regulator_get_by_ofw_property(dev, 0, "power-supply", in pwm_backlight_attach()
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/freebsd/sys/contrib/device-tree/src/arm64/ti/
H A Dk3-am654-base-board-rocktech-rk101-panel.dtso1 // SPDX-License-Identifier: GPL-2.0-only OR MIT
3 * OLDI-LCD1EVM Rocktech integrated panel and touch DT overlay for AM654-EVM.
4 * Panel Link: https://www.digimax.it/en/tft-lcd/20881-RK101II01D-CT
7 * Copyright (C) 2023-2024 Texas Instruments Incorporated - https://www.ti.com/
10 /dts-v1/;
13 #include <dt-bindings/pwm/pwm.h>
14 #include <dt-bindings/gpio/gpio.h>
15 #include <dt-bindings/interrupt-controller/irq.h>
19 compatible = "rocktech,rk101ii01d-ct";
20 backlight = <&lcd_bl>;
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