From: Chris Morgan <macroalpha82@gmail.com>
To: linux-rockchip@lists.infradead.org
Cc: devicetree@vger.kernel.org,
	xsf@rock-chips.com,
	sre@kernel.org,
	heiko@sntech.de,
	conor+dt@kernel.org,
	krzk+dt@kernel.org,
	robh@kernel.org,
	Chris Morgan <macromorgan@hotmail.com>,
	Conor Dooley <conor.dooley@microchip.com>
Subject: [PATCH V8 1/4] dt-bindings: power: supply: sgm41542: document sgm41542
Date: Tue, 21 Jul 2026 12:09:04 -0500
Message-ID: <20260721170907.131731-2-macroalpha82@gmail.com>
In-Reply-To: <20260721170907.131731-1-macroalpha82@gmail.com>
References: <20260721170907.131731-1-macroalpha82@gmail.com>
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From: Chris Morgan <macromorgan@hotmail.com>

Document the SG Micro sgm41542 battery charger/boost converter.
The parameters of input-current-limit-microamp and
input-voltage-limit-microvolt are defined as such since they are in
common use among multiple bindings currently.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../power/supply/sgmicro,sgm41542.yaml        | 96 +++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/supply/sgmicro,sgm41542.yaml

diff --git a/Documentation/devicetree/bindings/power/supply/sgmicro,sgm41542.yaml b/Documentation/devicetree/bindings/power/supply/sgmicro,sgm41542.yaml
new file mode 100644
index 000000000000..af80fe528505
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/sgmicro,sgm41542.yaml
@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/sgmicro,sgm41542.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SGM41542 Battery Charger
+
+description:
+  The SGMicro SGM41542 is a single cell battery charger/boost controller.
+
+maintainers:
+  - Chris Morgan <macromorgan@hotmail.com>
+  - Xu Shengfei <xsf@rock-chips.com>
+
+allOf:
+  - $ref: power-supply.yaml#
+
+properties:
+  compatible:
+    const: sgmicro,sgm41542
+
+  input-current-limit-microamp:
+    default: 2400000
+    minimum: 100000
+    maximum: 3800000
+
+  input-voltage-limit-microvolt:
+    default: 4500000
+    minimum: 3900000
+    maximum: 12000000
+
+  interrupts:
+    maxItems: 1
+
+  monitored-battery:
+    description: |
+        The charger uses the following battery properties
+        constant-charge-current-max-microamp (default 2040000)
+        constant-charge-voltage-max-microvolt (default 4208000)
+        charge-term-current-microamp (default 180000)
+        precharge-current-microamp (default 180000)
+
+  reg:
+    maxItems: 1
+
+  regulators:
+    type: object
+    properties:
+      otg-vbus:
+        type: object
+        description: OTG boost regulator
+        $ref: /schemas/regulator/regulator.yaml
+        unevaluatedProperties: false
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    battery: battery {
+      compatible = "simple-battery";
+      constant-charge-current-max-microamp = <10000000>;
+      constant-charge-voltage-max-microvolt = <4350000>;
+      precharge-current-microamp = <180000>;
+      charge-term-current-microamp = <300000>;
+    };
+
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      charger@3b {
+        compatible = "sgmicro,sgm41542";
+        reg = <0x3b>;
+        input-current-limit-microamp = <3000000>;
+        input-voltage-limit-microvolt = <4500000>;
+        interrupt-parent = <&gpio0>;
+        interrupts = <26 IRQ_TYPE_EDGE_FALLING>;
+        monitored-battery = <&battery>;
+
+        regulators {
+          otg-vbus {
+            regulator-max-microvolt = <5000000>;
+            regulator-min-microvolt = <5000000>;
+          };
+        };
+      };
+    };
-- 
2.43.0