linux-kernel - [PATCH 1/2] dt-bindings: power: supply: document Samsung S2MU005 battery fuel gauge

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Message-Id: <20260126-s2mu005-fuelgauge-v1-1-68a146ed0819@disroot.org>
Date: Mon, 26 Jan 2026 21:09:48 +0530
From: Kaustabh Chakraborty <kauschluss@...root.org>
To: Yassine Oudjana <y.oudjana@...tonmail.com>, 
 Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-pm@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Kaustabh Chakraborty <kauschluss@...root.org>
Subject: [PATCH 1/2] dt-bindings: power: supply: document Samsung S2MU005
 battery fuel gauge

Samsung S2MU005 is a PMIC device which has LED controllers, an MUIC and
a battery charger. The battery charger is paired with an independent
device connected via I2C which can be used to access various metrics of
the battery. Document the device as a schema.

Signed-off-by: Kaustabh Chakraborty <kauschluss@...root.org>
---
 .../power/supply/samsung,s2mu005-fuel-gauge.yaml   | 49 ++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/Documentation/devicetree/bindings/power/supply/samsung,s2mu005-fuel-gauge.yaml b/Documentation/devicetree/bindings/power/supply/samsung,s2mu005-fuel-gauge.yaml
new file mode 100644
index 0000000000000..5f945a5369dc8
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/samsung,s2mu005-fuel-gauge.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/samsung,s2mu005-fuel-gauge.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Battery Fuel Gauge for Samsung S2M series PMICs
+
+maintainers:
+  - Kaustabh Chakraborty <kauschluss@...root.org>
+
+allOf:
+  - $ref: power-supply.yaml#
+
+properties:
+  compatible:
+    enum:
+      - samsung,s2mu005-fuel-gauge
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      fuelgauge@3b {
+        compatible = "samsung,s2mu005-fuel-gauge";
+        reg = <0x3b>;
+
+        interrupt-parent = <&gpa0>;
+        interrupts = <3 IRQ_TYPE_EDGE_BOTH>;
+
+        monitored-battery = <&battery>;
+      };
+    };

-- 
2.52.0