linux-kernel - [PATCH 1/4] dt-bindings: hwmon: Add qcom,bcl-hwmon yaml bindings

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Message-Id: <20260206-qcom-bcl-hwmon-v1-1-7b426f0b77a1@oss.qualcomm.com>
Date: Fri, 06 Feb 2026 02:44:05 +0530
From: Manaf Meethalavalappu Pallikunhi <manaf.pallikunhi@....qualcomm.com>
To: Guenter Roeck <linux@...ck-us.net>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>, amit.kucheria@....qualcomm.com,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Gaurav Kohli <gaurav.kohli@....qualcomm.com>
Cc: linux-hwmon@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Manaf Meethalavalappu Pallikunhi <manaf.pallikunhi@....qualcomm.com>
Subject: [PATCH 1/4] dt-bindings: hwmon: Add qcom,bcl-hwmon yaml bindings

Add devicetree binding documentation for Qualcomm PMIC Battery Current
Limiting (BCL) hardware monitor. The BCL hardware provides monitoring
and alarm functionality for battery overcurrent and battery/system
under voltage conditions.

Signed-off-by: Manaf Meethalavalappu Pallikunhi <manaf.pallikunhi@....qualcomm.com>
---
 .../devicetree/bindings/hwmon/qcom,bcl-hwmon.yaml  | 128 +++++++++++++++++++++
 1 file changed, 128 insertions(+)

diff --git a/Documentation/devicetree/bindings/hwmon/qcom,bcl-hwmon.yaml b/Documentation/devicetree/bindings/hwmon/qcom,bcl-hwmon.yaml
new file mode 100644
index 000000000000..a0e8eaf13eec
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/qcom,bcl-hwmon.yaml
@@ -0,0 +1,128 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/qcom,bcl-hwmon.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SPMI PMIC Battery Current Limiting (BCL) Hardware Monitor
+
+maintainers:
+  - Manaf Meethalavalappu Pallikunhi <manaf.pallikunhi@....qualcomm.com>
+
+description: |
+  SPMI PMIC Battery Current Limiting (BCL) hardware provides monitoring and
+  alarm functionality for battery overcurrent and battery or system under
+  voltage conditions. It monitors battery voltage and current, and
+  can trigger interrupts when configurable thresholds are exceeded.
+
+properties:
+  compatible:
+    oneOf:
+      - description: v1 based BCL
+        items:
+          - enum:
+              - qcom,pm7250b-bcl
+              - qcom,pm8250b-bcl
+          - const: qcom,bcl-v1
+
+      - description: v2 based BCL
+        items:
+          - enum:
+              - qcom,pm8350b-bcl
+              - qcom,pm8350c-bcl
+          - const: qcom,bcl-v2
+
+      - description: v3 bmx based BCL
+        items:
+          - enum:
+              - qcom,pm8550b-bcl
+              - qcom,pm7550ba-bcl
+          - const: qcom,bcl-v3-bmx
+
+      - description: v3 core based BCL
+        items:
+          - enum:
+              - qcom,pm8550-bc0l
+              - qcom,pm7550-bcl
+          - const: qcom,bcl-v3-core
+
+      - description: v3 wb based BCL
+        items:
+          - enum:
+              - qcom,pmw5100-bcl
+          - const: qcom,bcl-v3-wb
+
+      - description: v4 bmx based BCL
+        items:
+          - enum:
+              - qcom,pmih010-bcl
+          - const: qcom,bcl-v4-bmx
+
+      - description: v4 bmx with different scale based BCL
+        items:
+          - enum:
+              - qcom,pmv010-bcl
+          - const: qcom,bcl-v4-pmv010
+
+      - description: v4 core based BCL
+        items:
+          - enum:
+              - qcom,pmh010-bcl
+          - const: qcom,bcl-v4-core
+
+      - description: v4 wb based BCL
+        items:
+          - enum:
+              - qcom,pmw6100-bcl
+          - const: qcom,bcl-v4-wb
+
+  reg:
+    maxItems: 1
+    description: BCL base address in the SPMI PMIC register map
+
+  interrupts:
+    minItems: 2
+    maxItems: 2
+    description:
+      BCL alarm interrupts for different threshold levels
+
+  interrupt-names:
+    items:
+      - const: bcl-max-min
+      - const: bcl-critical
+
+  overcurrent-thresholds-milliamp:
+    description:
+      Current thresholds in milliamperes for the two configurable current
+      alarm levels (max and critical). These values are used to override
+      default thresholds if a platform has different battery ocp specification.
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    minItems: 2
+    maxItems: 2
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    pmic {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        bcl@...0 {
+            compatible = "qcom,pm7250b-bcl", "qcom,bcl-v1";
+            reg = <0x1d00>;
+            interrupts = <0x2 0x1d 0x0 IRQ_TYPE_EDGE_RISING>,
+                         <0x2 0x1d 0x1 IRQ_TYPE_EDGE_RISING>;
+            interrupt-names = "bcl-max-min",
+                              "bcl-critical";
+            overcurrent-thresholds-milliamp = <5500 6000>;
+        };
+    };

-- 
2.43.0