1*3004e581SSebastian Reichel# SPDX-License-Identifier: GPL-2.0 2*3004e581SSebastian Reichel%YAML 1.2 3*3004e581SSebastian Reichel--- 4*3004e581SSebastian Reichel$id: "http://devicetree.org/schemas/power/supply/lego,ev3-battery.yaml#" 5*3004e581SSebastian Reichel$schema: "http://devicetree.org/meta-schemas/core.yaml#" 6*3004e581SSebastian Reichel 7*3004e581SSebastian Reicheltitle: LEGO MINDSTORMS EV3 Battery 8*3004e581SSebastian Reichel 9*3004e581SSebastian Reichelmaintainers: 10*3004e581SSebastian Reichel - David Lechner <david@lechnology.com> 11*3004e581SSebastian Reichel - Sebastian Reichel <sre@kernel.org> 12*3004e581SSebastian Reichel 13*3004e581SSebastian Reicheldescription: | 14*3004e581SSebastian Reichel LEGO MINDSTORMS EV3 has some built-in capability for monitoring the battery. 15*3004e581SSebastian Reichel It uses 6 AA batteries or a special Li-ion rechargeable battery pack that is 16*3004e581SSebastian Reichel detected by a key switch in the battery compartment. 17*3004e581SSebastian Reichel 18*3004e581SSebastian ReichelallOf: 19*3004e581SSebastian Reichel - $ref: power-supply.yaml# 20*3004e581SSebastian Reichel 21*3004e581SSebastian Reichelproperties: 22*3004e581SSebastian Reichel compatible: 23*3004e581SSebastian Reichel const: lego,ev3-battery 24*3004e581SSebastian Reichel 25*3004e581SSebastian Reichel io-channels: 26*3004e581SSebastian Reichel items: 27*3004e581SSebastian Reichel - description: ADC channel for battery voltage 28*3004e581SSebastian Reichel - description: ADC channel for battery current 29*3004e581SSebastian Reichel 30*3004e581SSebastian Reichel io-channel-names: 31*3004e581SSebastian Reichel items: 32*3004e581SSebastian Reichel - const: voltage 33*3004e581SSebastian Reichel - const: current 34*3004e581SSebastian Reichel 35*3004e581SSebastian Reichel rechargeable-gpios: 36*3004e581SSebastian Reichel maxItems: 1 37*3004e581SSebastian Reichel description: Rechargeable battery indication gpio 38*3004e581SSebastian Reichel 39*3004e581SSebastian Reichelrequired: 40*3004e581SSebastian Reichel - compatible 41*3004e581SSebastian Reichel - io-channels 42*3004e581SSebastian Reichel - io-channel-names 43*3004e581SSebastian Reichel - rechargeable-gpios 44*3004e581SSebastian Reichel 45*3004e581SSebastian ReicheladditionalProperties: false 46*3004e581SSebastian Reichel 47*3004e581SSebastian Reichelexamples: 48*3004e581SSebastian Reichel - | 49*3004e581SSebastian Reichel #include <dt-bindings/gpio/gpio.h> 50*3004e581SSebastian Reichel battery { 51*3004e581SSebastian Reichel compatible = "lego,ev3-battery"; 52*3004e581SSebastian Reichel io-channels = <&adc 4>, <&adc 3>; 53*3004e581SSebastian Reichel io-channel-names = "voltage", "current"; 54*3004e581SSebastian Reichel rechargeable-gpios = <&gpio 136 GPIO_ACTIVE_LOW>; 55*3004e581SSebastian Reichel }; 56