67 lines · yaml
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)2%YAML 1.23---4 5$id: http://devicetree.org/schemas/i2c/google,cros-ec-i2c-tunnel.yaml#6$schema: http://devicetree.org/meta-schemas/core.yaml#7 8title: I2C bus that tunnels through the ChromeOS EC (cros-ec)9 10maintainers:11 - Doug Anderson <dianders@chromium.org>12 - Benson Leung <bleung@chromium.org>13 14description: |15 On some ChromeOS board designs we've got a connection to the EC16 (embedded controller) but no direct connection to some devices on the17 other side of the EC (like a battery and PMIC). To get access to18 those devices we need to tunnel our i2c commands through the EC.19 20 The node for this device should be under a cros-ec node like21 google,cros-ec-spi or google,cros-ec-i2c.22 23allOf:24 - $ref: /schemas/i2c/i2c-controller.yaml#25 26properties:27 compatible:28 const: google,cros-ec-i2c-tunnel29 30 google,remote-bus:31 description: The EC bus we'd like to talk to.32 $ref: /schemas/types.yaml#/definitions/uint3233 34required:35 - compatible36 - google,remote-bus37 38unevaluatedProperties: false39 40examples:41 - |42 spi {43 #address-cells = <1>;44 #size-cells = <0>;45 46 cros-ec@0 {47 compatible = "google,cros-ec-spi";48 reg = <0>;49 spi-max-frequency = <5000000>;50 interrupts = <99 0>;51 52 i2c-tunnel {53 compatible = "google,cros-ec-i2c-tunnel";54 #address-cells = <1>;55 #size-cells = <0>;56 57 google,remote-bus = <0>;58 59 battery: sbs-battery@b {60 compatible = "sbs,sbs-battery";61 reg = <0xb>;62 sbs,poll-retry-count = <1>;63 };64 };65 };66 };67