67 lines
1.7 KiB
YAML
67 lines
1.7 KiB
YAML
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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/i2c/google,cros-ec-i2c-tunnel.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: I2C bus that tunnels through the ChromeOS EC (cros-ec)
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maintainers:
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- Doug Anderson <dianders@chromium.org>
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- Benson Leung <bleung@chromium.org>
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- Enric Balletbo i Serra <enric.balletbo@collabora.com>
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description: |
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On some ChromeOS board designs we've got a connection to the EC
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(embedded controller) but no direct connection to some devices on the
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other side of the EC (like a battery and PMIC). To get access to
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those devices we need to tunnel our i2c commands through the EC.
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The node for this device should be under a cros-ec node like
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google,cros-ec-spi or google,cros-ec-i2c.
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allOf:
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- $ref: /schemas/i2c/i2c-controller.yaml#
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properties:
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compatible:
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const: google,cros-ec-i2c-tunnel
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google,remote-bus:
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description: The EC bus we'd like to talk to.
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$ref: /schemas/types.yaml#/definitions/uint32
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required:
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- compatible
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- google,remote-bus
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unevaluatedProperties: false
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examples:
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- |
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spi0 {
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#address-cells = <1>;
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#size-cells = <0>;
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cros-ec@0 {
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compatible = "google,cros-ec-spi";
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reg = <0>;
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spi-max-frequency = <5000000>;
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i2c-tunnel {
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compatible = "google,cros-ec-i2c-tunnel";
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#address-cells = <1>;
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#size-cells = <0>;
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google,remote-bus = <0>;
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battery: sbs-battery@b {
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compatible = "sbs,sbs-battery";
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reg = <0xb>;
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sbs,poll-retry-count = <1>;
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};
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};
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};
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};
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