| # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| |
| $id: http://devicetree.org/schemas/i2c/google,cros-ec-i2c-tunnel.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: I2C bus that tunnels through the ChromeOS EC (cros-ec) |
| |
| maintainers: |
| - Doug Anderson <dianders@chromium.org> |
| - Benson Leung <bleung@chromium.org> |
| |
| description: | |
| On some ChromeOS board designs we've got a connection to the EC |
| (embedded controller) but no direct connection to some devices on the |
| other side of the EC (like a battery and PMIC). To get access to |
| those devices we need to tunnel our i2c commands through the EC. |
| |
| The node for this device should be under a cros-ec node like |
| google,cros-ec-spi or google,cros-ec-i2c. |
| |
| allOf: |
| - $ref: i2c-controller.yaml# |
| |
| properties: |
| compatible: |
| const: google,cros-ec-i2c-tunnel |
| |
| google,remote-bus: |
| description: The EC bus we'd like to talk to. |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| |
| required: |
| - compatible |
| - google,remote-bus |
| |
| unevaluatedProperties: false |
| |
| examples: |
| - | |
| spi { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| cros-ec@0 { |
| compatible = "google,cros-ec-spi"; |
| reg = <0>; |
| spi-max-frequency = <5000000>; |
| interrupts = <99 0>; |
| |
| i2c-tunnel { |
| compatible = "google,cros-ec-i2c-tunnel"; |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| google,remote-bus = <0>; |
| |
| battery: sbs-battery@b { |
| compatible = "sbs,sbs-battery"; |
| reg = <0xb>; |
| sbs,poll-retry-count = <1>; |
| }; |
| }; |
| }; |
| }; |
