# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2 --- $id: http://devicetree.org/schemas/mfd/google,cros-ec.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: ChromeOS Embedded Controller maintainers: - Benson Leung - Enric Balletbo i Serra - Guenter Roeck description: Google's ChromeOS EC is a microcontroller which talks to the AP and implements various functions such as keyboard and battery charging. The EC can be connected through various interfaces (I2C, SPI, and others) and the compatible string specifies which interface is being used. properties: compatible: oneOf: - description: For implementations of the EC is connected through I2C. const: google,cros-ec-i2c - description: For implementations of the EC is connected through SPI. const: google,cros-ec-spi - description: For implementations of the EC is connected through RPMSG. const: google,cros-ec-rpmsg controller-data: description: SPI controller data, see bindings/spi/spi-samsung.txt type: object google,cros-ec-spi-pre-delay: description: This property specifies the delay in usecs between the assertion of the CS and the first clock pulse. allOf: - $ref: /schemas/types.yaml#/definitions/uint32 - default: 0 - minimum: 0 google,cros-ec-spi-msg-delay: description: This property specifies the delay in usecs between messages. allOf: - $ref: /schemas/types.yaml#/definitions/uint32 - default: 0 - minimum: 0 google,has-vbc-nvram: description: Some implementations of the EC include a small nvram space used to store verified boot context data. This boolean flag is used to specify whether this nvram is present or not. type: boolean mtk,rpmsg-name: description: Must be defined if the cros-ec is a rpmsg device for a Mediatek ARM Cortex M4 Co-processor. Contains the name pf the rpmsg device. Used to match the subnode to the rpmsg device announced by the SCP. $ref: "/schemas/types.yaml#/definitions/string" spi-max-frequency: description: Maximum SPI frequency of the device in Hz. reg: maxItems: 1 interrupts: maxItems: 1 wakeup-source: description: Button can wake-up the system. '#address-cells': const: 1 '#size-cells': const: 0 typec: $ref: "/schemas/chrome/google,cros-ec-typec.yaml#" ec-pwm: $ref: "/schemas/pwm/google,cros-ec-pwm.yaml#" keyboard-controller: $ref: "/schemas/input/google,cros-ec-keyb.yaml#" codecs: type: object additionalProperties: false properties: '#address-cells': const: 2 '#size-cells': const: 1 patternProperties: "^ec-codec@[a-f0-9]+$": type: object $ref: "/schemas/sound/google,cros-ec-codec.yaml#" required: - "#address-cells" - "#size-cells" patternProperties: "^i2c-tunnel[0-9]*$": type: object $ref: "/schemas/i2c/google,cros-ec-i2c-tunnel.yaml#" "^regulator@[0-9]+$": type: object $ref: "/schemas/regulator/google,cros-ec-regulator.yaml#" "^extcon[0-9]*$": type: object $ref: "/schemas/extcon/extcon-usbc-cros-ec.yaml#" required: - compatible if: properties: compatible: contains: enum: - google,cros-ec-i2c - google,cros-ec-rpmsg then: properties: google,cros-ec-spi-pre-delay: false google,cros-ec-spi-msg-delay: false spi-max-frequency: false additionalProperties: false examples: # Example for I2C - | #include #include i2c0 { #address-cells = <1>; #size-cells = <0>; cros-ec@1e { compatible = "google,cros-ec-i2c"; reg = <0x1e>; interrupts = <6 0>; interrupt-parent = <&gpio0>; }; }; # Example for SPI - | #include #include spi0 { #address-cells = <1>; #size-cells = <0>; cros-ec@0 { compatible = "google,cros-ec-spi"; reg = <0x0>; google,cros-ec-spi-msg-delay = <30>; google,cros-ec-spi-pre-delay = <10>; interrupts = <99 0>; interrupt-parent = <&gpio7>; spi-max-frequency = <5000000>; }; }; # Example for RPMSG - | scp0 { cros-ec { compatible = "google,cros-ec-rpmsg"; }; }; ...