hwmon: Add Qualcomm PMIC BCL hardware monitor driver

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@oss.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>;
+
+        sensor@1d00 {
+            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>;
+        };
+    };

Documentation/devicetree/bindings/mfd/qcom,spmi-pmic.yaml

@@ -184,6 +184,10 @@ patternProperties:
     type: object
     $ref: /schemas/rtc/qcom-pm8xxx-rtc.yaml#
 
+  "^sensor@[0-9a-f]+$":
+    type: object
+    $ref: /schemas/hwmon/qcom,bcl-hwmon.yaml#
+
   "^temp-alarm@[0-9a-f]+$":
     type: object
     $ref: /schemas/thermal/qcom,spmi-temp-alarm.yaml#

MAINTAINERS

@@ -21056,6 +21056,15 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/net/qcom,bam-dmux.yaml
 F:	drivers/net/wwan/qcom_bam_dmux.c
 
+QUALCOMM BCL HARDWARE MONITOR DRIVER
+M:	Manaf Meethalavalappu Pallikunhi <manaf.pallikunhi@oss.qualcomm.com>
+L:	linux-hwmon@vger.kernel.org
+L:	linux-arm-msm@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/hwmon/qcom,bcl-hwmon.yaml
+F:	drivers/hwmon/qcom-bcl-hwmon.c
+F:	drivers/hwmon/qcom-bcl-hwmon.h
+
 QUALCOMM BLUETOOTH DRIVER
 L:	linux-arm-msm@vger.kernel.org
 S:	Maintained

arch/arm64/boot/dts/qcom/pm7250b.dtsi

@@ -202,6 +202,16 @@
 			interrupt-controller;
 			#interrupt-cells = <2>;
 		};
+
+		sensor@1d00 {
+			compatible = "qcom,pm7250b-bcl", "qcom,bcl-v1";
+			reg = <0x1d00>;
+			interrupts = <PM7250B_SID 0x1d 0x0 IRQ_TYPE_EDGE_RISING>,
+				     <PM7250B_SID 0x1d 0x1 IRQ_TYPE_EDGE_RISING>;
+			interrupt-names = "bcl-max-min",
+					  "bcl-critical";
+			overcurrent-thresholds-milliamp = <5500 6000>;
+		};
 	};
 
 	pmic@PM7250B_SID1 {

arch/arm64/boot/dts/qcom/pm8350c.dtsi

@@ -41,6 +41,15 @@
 			#pwm-cells = <2>;
 			status = "disabled";
 		};
+
+		sensor@4700 {
+			compatible = "qcom,pm8350c-bcl", "qcom,bcl-v2";
+			reg = <0x4700>;
+			interrupts = <0x2 0x47 0x0 IRQ_TYPE_EDGE_RISING>,
+				     <0x2 0x47 0x1 IRQ_TYPE_EDGE_RISING>;
+			interrupt-names = "bcl-max-min",
+					  "bcl-critical";
+		};
 	};
 };
 

arch/arm64/configs/qcom.config

@@ -54,6 +54,7 @@ CONFIG_STM_SOURCE_FTRACE=m
 CONFIG_STM_SOURCE_HEARTBEAT=m
 CONFIG_SENSORS_AMC6821=y
 CONFIG_SENSORS_EMC2305=y
+CONFIG_SENSORS_QCOM_BCL=y
 CONFIG_TRACE_MMIO_ACCESS=y
 CONFIG_UCLAMP_TASK_GROUP=y
 CONFIG_UCLAMP_TASK=y

drivers/hwmon/Kconfig

@@ -1893,6 +1893,15 @@ config SENSORS_PWM_FAN
 	  This driver can also be built as a module. If so, the module
 	  will be called pwm-fan.
 
+config SENSORS_QCOM_BCL
+	tristate "Qualcomm BCL hardware monitoring"
+	help
+	  Say yes here to enable support for Qualcomm battery over current
+	  and under voltage alarms monitor.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called qcom-bcl-hwmon.
+
 config SENSORS_QNAP_MCU_HWMON
 	tristate "QNAP MCU hardware monitoring"
 	depends on MFD_QNAP_MCU

drivers/hwmon/Makefile

@@ -196,6 +196,7 @@ obj-$(CONFIG_SENSORS_POWERZ)	+= powerz.o
 obj-$(CONFIG_SENSORS_POWR1220)  += powr1220.o
 obj-$(CONFIG_SENSORS_PT5161L)	+= pt5161l.o
 obj-$(CONFIG_SENSORS_PWM_FAN)	+= pwm-fan.o
+obj-$(CONFIG_SENSORS_QCOM_BCL)	+= qcom-bcl-hwmon.o
 obj-$(CONFIG_SENSORS_QNAP_MCU_HWMON)	+= qnap-mcu-hwmon.o
 obj-$(CONFIG_SENSORS_RASPBERRYPI_HWMON)	+= raspberrypi-hwmon.o
 obj-$(CONFIG_SENSORS_SA67MCU)	+= sa67mcu-hwmon.o