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diff --git a/Bindings/mfd/google,cros-ec.yaml b/Bindings/mfd/google,cros-ec.yaml
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+# 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 <bleung@chromium.org>
+ - Guenter Roeck <groeck@chromium.org>
+
+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 connected through I2C.
+ const: google,cros-ec-i2c
+ - description:
+ For implementations of the EC connected through SPI.
+ const: google,cros-ec-spi
+ - description:
+ For implementations of the FPMCU connected through SPI.
+ items:
+ - const: google,cros-ec-fp
+ - const: google,cros-ec-spi
+ - description:
+ For implementations of the EC connected through RPMSG.
+ const: google,cros-ec-rpmsg
+ - description:
+ For implementations of the EC connected through UART.
+ const: google,cros-ec-uart
+
+ controller-data: true
+
+ 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.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 0
+
+ google,cros-ec-spi-msg-delay:
+ description:
+ This property specifies the delay in usecs between messages.
+ $ref: /schemas/types.yaml#/definitions/uint32
+ default: 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
+
+ mediatek,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 of 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: true
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ reset-gpios:
+ maxItems: 1
+
+ boot0-gpios:
+ maxItems: 1
+ description: Assert for bootloader mode.
+
+ vdd-supply: true
+
+ 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#
+ deprecated: true
+
+ pwm:
+ $ref: /schemas/pwm/google,cros-ec-pwm.yaml#
+
+ kbd-led-backlight:
+ $ref: /schemas/chrome/google,cros-kbd-led-backlight.yaml#
+
+ keyboard-controller:
+ $ref: /schemas/input/google,cros-ec-keyb.yaml#
+
+ proximity:
+ $ref: /schemas/iio/proximity/google,cros-ec-mkbp-proximity.yaml#
+
+ codecs:
+ type: object
+ additionalProperties: false
+
+ properties:
+ '#address-cells':
+ const: 2
+
+ '#size-cells':
+ const: 1
+
+ patternProperties:
+ "^ec-codec@[a-f0-9]+$":
+ type: object
+ $ref: /schemas/sound/google,cros-ec-codec.yaml#
+
+ required:
+ - "#address-cells"
+ - "#size-cells"
+
+ cbas:
+ type: object
+
+ description:
+ This device is used to signal when a detachable base is attached
+ to a Chrome OS tablet. This device cannot be detected at runtime.
+
+ properties:
+ compatible:
+ const: google,cros-cbas
+
+ required:
+ - compatible
+
+ additionalProperties: false
+
+patternProperties:
+ "^i2c-tunnel[0-9]*$":
+ 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
+
+allOf:
+ - if:
+ properties:
+ compatible:
+ not:
+ contains:
+ const: google,cros-ec-spi
+ then:
+ properties:
+ controller-data: false
+ google,cros-ec-spi-pre-delay: false
+ google,cros-ec-spi-msg-delay: false
+ spi-max-frequency: false
+ else:
+ $ref: /schemas/spi/spi-peripheral-props.yaml
+
+ - if:
+ properties:
+ compatible:
+ not:
+ contains:
+ const: google,cros-ec-rpmsg
+ then:
+ properties:
+ mediatek,rpmsg-name: false
+
+ - if:
+ properties:
+ compatible:
+ not:
+ contains:
+ enum:
+ - google,cros-ec-rpmsg
+ - google,cros-ec-uart
+ then:
+ required:
+ - reg
+ - interrupts
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: google,cros-ec-fp
+ then:
+ properties:
+ '#address-cells': false
+ '#size-cells': false
+ typec: false
+ ec-pwm: false
+ kbd-led-backlight: false
+ keyboard-controller: false
+ proximity: false
+ codecs: false
+ cbas: false
+
+ patternProperties:
+ "^i2c-tunnel[0-9]*$": false
+ "^regulator@[0-9]+$": false
+ "^extcon[0-9]*$": false
+
+ # Using additionalProperties: false here and
+ # listing true properties doesn't work
+
+ required:
+ - reset-gpios
+ - boot0-gpios
+ - vdd-supply
+ else:
+ properties:
+ reset-gpios: false
+ boot0-gpios: false
+ vdd-supply: false
+
+additionalProperties: false
+
+examples:
+ # Example for I2C
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ i2c {
+ #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 <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ spi {
+ #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>;
+
+ proximity {
+ compatible = "google,cros-ec-mkbp-proximity";
+ };
+
+ cbas {
+ compatible = "google,cros-cbas";
+ };
+ };
+ };
+
+ # Example for RPMSG
+ - |
+ scp0 {
+ cros-ec {
+ compatible = "google,cros-ec-rpmsg";
+ };
+ };
+
+ # Example for FPMCU
+ - |
+ spi {
+ #address-cells = <0x1>;
+ #size-cells = <0x0>;
+
+ ec@0 {
+ compatible = "google,cros-ec-fp", "google,cros-ec-spi";
+ reg = <0x0>;
+ interrupt-parent = <&gpio_controller>;
+ interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
+ spi-max-frequency = <3000000>;
+ reset-gpios = <&gpio_controller 5 GPIO_ACTIVE_LOW>;
+ boot0-gpios = <&gpio_controller 10 GPIO_ACTIVE_HIGH>;
+ vdd-supply = <&pp3300_fp_mcu>;
+ };
+ };
+
+ # Example for UART
+ - |
+ serial {
+ cros-ec {
+ compatible = "google,cros-ec-uart";
+ };
+ };
+...