67 lines
1.7 KiB
YAML
67 lines
1.7 KiB
YAML
# 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>;
|
|
};
|
|
};
|
|
};
|
|
};
|