[PATCH v2 1/2] dt-bindings: power: supply: Add GL.iNet GL-E750 MCU

[Serv Pol via B4 Relay <devnull+servpol.tuta.io@kernel.org>]

From: Serv Pol <servpol@tuta.io>

The GL.iNet GL-E750 (Mudi) travel router has a microcontroller on the SoC
UART. It drives the OLED status screen, monitors the battery and reports
when the power switch is turned off, a few seconds before it cuts the
power. Add a binding for it.

Assisted-by: Claude:claude-opus-5-5
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Serv Pol <servpol@tuta.io>
---
 .../bindings/power/supply/glinet,gl-e750-mcu.yaml  | 37 ++++++++++++++++++++++
 MAINTAINERS                                        |  6 ++++
 2 files changed, 43 insertions(+)

diff --git a/Documentation/devicetree/bindings/power/supply/glinet,gl-e750-mcu.yaml b/Documentation/devicetree/bindings/power/supply/glinet,gl-e750-mcu.yaml
new file mode 100644
index 000000000..a7ea4dde8
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/glinet,gl-e750-mcu.yaml
@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/glinet,gl-e750-mcu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: GL.iNet GL-E750 status MCU
+
+maintainers:
+  - Serv Pol <servpol@tuta.io>
+
+description:
+  The GL.iNet GL-E750 (Mudi) travel router has a microcontroller connected
+  to the SoC UART. It drives the OLED status screen, monitors the battery
+  and reports when the power switch is turned off, a few seconds before it
+  cuts the power.
+
+allOf:
+  - $ref: power-supply.yaml#
+  - $ref: /schemas/serial/serial-peripheral-props.yaml#
+
+properties:
+  compatible:
+    const: glinet,gl-e750-mcu
+
+required:
+  - compatible
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    serial {
+        mcu {
+            compatible = "glinet,gl-e750-mcu";
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 3a19da74d..247432449 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11105,6 +11105,12 @@ L:	platform-driver-x86@vger.kernel.org
 S:	Maintained
 F:	drivers/platform/x86/gigabyte-wmi.c
 
+GL.INET GL-E750 MCU BATTERY DRIVER
+M:	Serv Pol <servpol@tuta.io>
+L:	linux-pm@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/power/supply/glinet,gl-e750-mcu.yaml
+
 GNSS SUBSYSTEM
 M:	Johan Hovold <johan@kernel.org>
 S:	Maintained

-- 
2.47.3