19243f296SRob Herring# SPDX-License-Identifier: GPL-2.0-only 29243f296SRob Herring%YAML 1.2 39243f296SRob Herring--- 49243f296SRob Herring$id: http://devicetree.org/schemas/leds/leds-gpio.yaml# 59243f296SRob Herring$schema: http://devicetree.org/meta-schemas/core.yaml# 69243f296SRob Herring 79243f296SRob Herringtitle: LEDs connected to GPIO lines 89243f296SRob Herring 99243f296SRob Herringmaintainers: 109243f296SRob Herring - Jacek Anaszewski <jacek.anaszewski@gmail.com> 119243f296SRob Herring - Pavel Machek <pavel@ucw.cz> 129243f296SRob Herring 139243f296SRob Herringdescription: 149243f296SRob Herring Each LED is represented as a sub-node of the gpio-leds device. Each 159243f296SRob Herring node's name represents the name of the corresponding LED. 169243f296SRob Herring 179243f296SRob Herringproperties: 189243f296SRob Herring compatible: 199243f296SRob Herring const: gpio-leds 209243f296SRob Herring 219243f296SRob HerringpatternProperties: 229243f296SRob Herring # The first form is preferred, but fall back to just 'led' anywhere in the 239243f296SRob Herring # node name to at least catch some child nodes. 249243f296SRob Herring "(^led-[0-9a-f]$|led)": 259243f296SRob Herring type: object 263d21a460SRob Herring $ref: common.yaml# 27*fe469e83SKrzysztof Kozlowski unevaluatedProperties: false 289243f296SRob Herring 299243f296SRob Herring properties: 309243f296SRob Herring gpios: 319243f296SRob Herring maxItems: 1 329243f296SRob Herring 339243f296SRob Herring retain-state-suspended: 349243f296SRob Herring description: 359243f296SRob Herring The suspend state can be retained.Such as charge-led gpio. 369243f296SRob Herring type: boolean 379243f296SRob Herring 389243f296SRob Herring retain-state-shutdown: 399243f296SRob Herring description: 409243f296SRob Herring Retain the state of the LED on shutdown. Useful in BMC systems, for 419243f296SRob Herring example when the BMC is rebooted while the host remains up. 429243f296SRob Herring type: boolean 439243f296SRob Herring 449243f296SRob Herring required: 459243f296SRob Herring - gpios 469243f296SRob Herring 479243f296SRob HerringadditionalProperties: false 489243f296SRob Herring 499243f296SRob Herringexamples: 509243f296SRob Herring - | 519243f296SRob Herring 529243f296SRob Herring #include <dt-bindings/gpio/gpio.h> 539243f296SRob Herring #include <dt-bindings/leds/common.h> 549243f296SRob Herring 559243f296SRob Herring leds { 569243f296SRob Herring compatible = "gpio-leds"; 579243f296SRob Herring led-0 { 589243f296SRob Herring gpios = <&mcu_pio 0 GPIO_ACTIVE_LOW>; 599243f296SRob Herring linux,default-trigger = "disk-activity"; 609243f296SRob Herring function = LED_FUNCTION_DISK; 619243f296SRob Herring }; 629243f296SRob Herring 639243f296SRob Herring led-1 { 649243f296SRob Herring gpios = <&mcu_pio 1 GPIO_ACTIVE_HIGH>; 659243f296SRob Herring /* Keep LED on if BIOS detected hardware fault */ 669243f296SRob Herring default-state = "keep"; 679243f296SRob Herring function = LED_FUNCTION_FAULT; 689243f296SRob Herring }; 699243f296SRob Herring }; 709243f296SRob Herring 719243f296SRob Herring run-control { 729243f296SRob Herring compatible = "gpio-leds"; 739243f296SRob Herring led-0 { 749243f296SRob Herring gpios = <&mpc8572 6 GPIO_ACTIVE_HIGH>; 759243f296SRob Herring color = <LED_COLOR_ID_RED>; 769243f296SRob Herring default-state = "off"; 779243f296SRob Herring }; 789243f296SRob Herring led-1 { 799243f296SRob Herring gpios = <&mpc8572 7 GPIO_ACTIVE_HIGH>; 809243f296SRob Herring color = <LED_COLOR_ID_GREEN>; 819243f296SRob Herring default-state = "on"; 829243f296SRob Herring }; 839243f296SRob Herring }; 849243f296SRob Herring 859243f296SRob Herring... 86