linux-kernel - [PATCH v5 3/8] dt-bindings: i2c: add support for tsd,mule

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Message-Id: <20240708-dev-mule-i2c-mux-v5-3-71446d3f0b8d@cherry.de>
Date: Mon, 08 Jul 2024 18:12:14 +0200
From: Farouk Bouabid <farouk.bouabid@...rry.de>
To: Andi Shyti <andi.shyti@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Farouk Bouabid <farouk.bouabid@...rry.de>, 
 Quentin Schulz <quentin.schulz@...rry.de>, Peter Rosin <peda@...ntia.se>, 
 Jean Delvare <jdelvare@...e.com>, Guenter Roeck <linux@...ck-us.net>, 
 Heiko Stuebner <heiko@...ech.de>
Cc: linux-i2c@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-hwmon@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org
Subject: [PATCH v5 3/8] dt-bindings: i2c: add support for tsd,mule

Theobroma Systems Mule is an MCU that emulates a set of I2C devices,
among which is an amc6821 and other 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 (amc6821: reg 0xff)

Signed-off-by: Farouk Bouabid <farouk.bouabid@...rry.de>
---
 .../devicetree/bindings/i2c/tsd,mule.yaml          | 63 ++++++++++++++++++++++
 1 file changed, 63 insertions(+)

diff --git a/Documentation/devicetree/bindings/i2c/tsd,mule.yaml b/Documentation/devicetree/bindings/i2c/tsd,mule.yaml
new file mode 100644
index 000000000000..dbbabba8dd6f
--- /dev/null
+++ b/Documentation/devicetree/bindings/i2c/tsd,mule.yaml
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/i2c/tsd,mule.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Theobroma Systems Mule I2C device
+
+maintainers:
+  - Farouk Bouabid <farouk.bouabid@...rry.de>
+  - Quentin Schulz <quentin.schulz@...rry.de>
+
+description: |
+  Theobroma Systems Mule is an MCU that emulates a set of I2C devices, among
+  which is an amc6821 and other 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 (amc6821: reg 0xff)
+
+additionalProperties: true
+
+properties:
+  compatible:
+    contains:
+      enum:
+        - tsd,mule
+        - ti,amc6821
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        fan@18 {
+            compatible = "tsd,mule", "ti,amc6821";
+            reg = <0x18>;
+
+            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>;
+                    };
+                };
+            };
+        };
+    };
+...

-- 
2.34.1