[PATCH v3 1/2] dt-bindings: embedded-controller: Document Surface RT EC

Svyatoslav Ryhel
2026-05-03T16:56:48Z

Document Embedded Controller used in Microsoft Surface RT tablets for
monitoring battery properties and charger status.

Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
---
.../microsoft,surface-rt-ec.yaml | 63 +++++++++++++++++++
1 file changed, 63 insertions(+)
create mode 100644 Documentation/devicetree/bindings/embedded-controller/microsoft,surface-rt-ec.yaml

diff --git a/Documentation/devicetree/bindings/embedded-controller/microsoft,surface-rt-ec.yaml b/Documentation/devicetree/bindings/embedded-controller/microsoft,surface-rt-ec.yaml
new file mode 100644
index 000000000000..0fee574a3015
--- /dev/null
+++ b/Documentation/devicetree/bindings/embedded-controller/microsoft,surface-rt-ec.yaml
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/embedded-controller/microsoft,surface-rt-ec.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microsoft Surface RT fuel gauge and charger EC
+
+maintainers:
+ - Jonas Schwöbel <jonasschwoebel@yahoo.de>
+ - Svyatoslav Ryhel <clamor95@gmail.com>
+
+description:
+ An Embedded Controller used in Microsoft Surface RT for monitoring
+ battery properties and charger status.
+
+allOf:
+ - $ref: /schemas/power/supply/power-supply.yaml#
+
+properties:
+ compatible:
+ const: microsoft,surface-rt-ec
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ enable-gpios:
+ maxItems: 1
+
+ monitored-battery: true
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - enable-gpios
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ embedded-controller@a {
+ compatible = "microsoft,surface-rt-ec";
+ reg = <0x0a>;
+
+ interrupt-parent = <&gpio>;
+ interrupts = <74 IRQ_TYPE_EDGE_RISING>;
+
+ enable-gpios = <&gpio 88 GPIO_ACTIVE_HIGH>;
+ monitored-battery = <&battery>;
+ };
+ };
+...
--
2.51.0