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dt-bindings: i2c: add support for tsd,mule-i2c-mux

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Theobroma Systems Mule is an MCU that emulates a set of I2C devices,
among which devices that are reachable through an I2C-mux. The devices
on the mux can be selected by writing the appropriate device number to
an I2C config register.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Farouk Bouabid <farouk.bouabid@cherry.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
This commit is contained in:
Farouk Bouabid 2024-09-06 17:54:12 +02:00 committed by Andi Shyti
parent 8f65c4552d
commit 4a875cf154
1 changed files with 69 additions and 0 deletions
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Documentation/devicetree/bindings/i2c/tsd,mule-i2c-mux.yaml Normal file
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/i2c/tsd,mule-i2c-mux.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Theobroma Systems Mule I2C multiplexer
maintainers:
- Farouk Bouabid <farouk.bouabid@cherry.de>
- Quentin Schulz <quentin.schulz@cherry.de>
description: |
Theobroma Systems Mule is an MCU that emulates a set of I2C devices, among
which devices that are reachable through an I2C-mux. The devices on the mux
can be selected by writing the appropriate device number to an I2C config
register.
+--------------------------------------------------+
| Mule |
0x18| +---------------+ |
-------->|Config register|----+ |
| +---------------+ | |
| V_ |
| | \ +--------+ |
| | \-------->| dev #0 | |
| | | +--------+ |
0x6f| | M |-------->| dev #1 | |
---------------------------->| U | +--------+ |
| | X |-------->| dev #2 | |
| | | +--------+ |
| | /-------->| dev #3 | |
| |__/ +--------+ |
+--------------------------------------------------+
allOf:
- $ref: /schemas/i2c/i2c-mux.yaml#
properties:
compatible:
const: tsd,mule-i2c-mux
required:
- compatible
unevaluatedProperties: false
examples:
- |
i2c-mux {
compatible = "tsd,mule-i2c-mux";
#address-cells = <1>;
#size-cells = <0>;
i2c@0 {
reg = <0x0>;
#address-cells = <1>;
#size-cells = <0>;
rtc@6f {
compatible = "isil,isl1208";
reg = <0x6f>;
};
};
};
...