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dt-bindings: i2c: convert i2c-cros-ec-tunnel to json-schema

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Convert the google,cros-ec-i2c-tunnel binding to YAML and add it as a
property of google,cros-ec.yaml.

Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Ricardo Cañuelo <ricardo.canuelo@collabora.com>
Link: https://lore.kernel.org/r/20201021114308.25485-2-ricardo.canuelo@collabora.com
[robh: add ref to i2c-controller.yaml]
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Ricardo Cañuelo 2020-10-21 13:43:06 +02:00 committed by Rob Herring
parent ca05f33316
commit 1acd4577a6
3 changed files with 71 additions and 39 deletions
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66
Documentation/devicetree/bindings/i2c/google,cros-ec-i2c-tunnel.yaml Normal file
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@ -0,0 +1,66 @@
# 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>
- Enric Balletbo i Serra <enric.balletbo@collabora.com>
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:
- |
spi0 {
#address-cells = <1>;
#size-cells = <0>;
cros-ec@0 {
compatible = "google,cros-ec-spi";
reg = <0>;
spi-max-frequency = <5000000>;
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>;
};
};
};
};

39
Documentation/devicetree/bindings/i2c/i2c-cros-ec-tunnel.txt
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@ -1,39 +0,0 @@
I2C bus that tunnels through the ChromeOS EC (cros-ec)
======================================================
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.
Required properties:
- compatible: google,cros-ec-i2c-tunnel
- google,remote-bus: The EC bus we'd like to talk to.
Optional child nodes:
- One node per I2C device connected to the tunnelled I2C bus.
Example:
cros-ec@0 {
compatible = "google,cros-ec-spi";
...
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>;
};
};
}

5
Documentation/devicetree/bindings/mfd/google,cros-ec.yaml
View file

@ -71,6 +71,11 @@ properties:
wakeup-source:
description: Button can wake-up the system.
patternProperties:
"^i2c-tunnel[0-9]*$":
type: object
$ref: "/schemas/i2c/google,cros-ec-i2c-tunnel.yaml#"
required:
- compatible