iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

dt-bindings:i2c:i2c-gate: txt to yaml conversion

Browse Source 
This file provides very little in the way of actual schema but
does provide a convenient intro to what an i2c-gate node actually
represents.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Peter Rosin <peda@axentia.se>
Cc: Wolfram Sang <wsa@the-dreams.de>
Link: https://lore.kernel.org/r/20201031181801.742585-2-jic23@kernel.org
Link: https://lore.kernel.org/r/20201128173343.390165-2-jic23@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Jonathan Cameron 2020-11-28 17:33:41 +00:00 committed by Rob Herring
parent e5dddbedfe
commit 9c8421e298
2 changed files with 39 additions and 41 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
Documentation/devicetree/bindings/i2c/i2c-gate.txt
View File

@ -1,41 +0,0 @@
An i2c gate is useful to e.g. reduce the digital noise for RF tuners connected
to the i2c bus. Gates are similar to arbitrators in that you need to perform
some kind of operation to access the i2c bus past the arbitrator/gate, but
there are no competing masters to consider for gates and therefore there is
no arbitration happening for gates.
Common i2c gate properties.
- i2c-gate child node
Required properties for the i2c-gate child node:
- #address-cells = <1>;
- #size-cells = <0>;
Optional properties for i2c-gate child node:
- Child nodes conforming to i2c bus binding
Example :
/*
An Invensense mpu9150 at address 0x68 featuring an on-chip Asahi
Kasei ak8975 compass behind a gate.
*/
mpu9150@68 {
compatible = "invensense,mpu9150";
reg = <0x68>;
interrupt-parent = <&gpio1>;
interrupts = <18 1>;
i2c-gate {
#address-cells = <1>;
#size-cells = <0>;
ax8975@c {
compatible = "ak,ak8975";
reg = <0x0c>;
};
};
};

39
Documentation/devicetree/bindings/i2c/i2c-gate.yaml Normal file
View File

@ -0,0 +1,39 @@
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/i2c/i2c-gate.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Common i2c gate properties
maintainers:
- Peter Rosin <peda@axentia.se>
description: |
An i2c gate is useful to e.g. reduce the digital noise for RF tuners connected
to the i2c bus. Gates are similar to arbitrators in that you need to perform
some kind of operation to access the i2c bus past the arbitrator/gate, but
there are no competing masters to consider for gates and therefore there is
no arbitration happening for gates.
allOf:
- $ref: /schemas/i2c/i2c-controller.yaml
properties:
$nodename:
const: i2c-gate
additionalProperties: true
examples:
- |
i2c-gate {
#address-cells = <1>;
#size-cells = <0>;
ak8975@c {
compatible = "ak,ak8975";
reg = <0x0c>;
};
};
...