Staging/max77840 device driver

Documentation/devicetree/bindings/mfd/maxim,max77840.yaml

@@ -0,0 +1,91 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/maxim,max77840.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX77840 PMIC
+
+maintainers:
+  - Joan Na <joan.na@analog.com>
+
+
+properties:
+  compatible:
+    const: maxim,max77840
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  regulator:
+    type: object
+    $ref: ../regulator/maxim,max77840-regulator.yaml#
+
+  charger:
+    type: object
+    $ref: ../power/supply/maxim,max77840-charger.yaml#
+
+  fuelgauge:
+    type: object
+    $ref: ../power/supply/maxim,max77840-fuelgauge.yaml#
+
+  charger-detect:
+    type: object
+    properties:
+      compatible:
+        const: maxim,max77840-charger-detect
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/gpio/gpio.h>
+
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      max77840@66 {
+        compatible = "maxim,max77840";
+        reg = <0x66>;
+        interrupt-parent = <&gpio>;
+        interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
+        status = "okay";
+
+        regulator {
+          SAFEOUT1 {
+            regulator-boot-on;
+            regulator-always-on;
+          };
+        };
+
+        charger {
+          compatible = "maxim,max77840-charger";
+          fast_charge_timer = <0>;                  // disable
+          fast_charge_current = <1500>;             // mA
+          charge_termination_voltage = <4350>;      // mV
+          topoff_timer = <30>;                      // min
+          topoff_current = <150>;                   // mA
+          restart_threshold = <150>;                // mV
+          input_current_limit = <500>;              // mA
+        };
+
+        charger-detect {
+          compatible = "maxim,max77840-charger-detect";
+        };
+
+        fuelgauge {
+          compatible = "maxim,max77840-fuelgauge";
+        };
+      };
+    };

Documentation/devicetree/bindings/power/supply/maxim,max77840-charger-detect.yaml

@@ -0,0 +1,26 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/maxim,max77840-charger-detect.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX77840 Charger Detect
+
+maintainers:
+  - Joan Na <joan.na@analog.com>
+
+properties:
+  compatible:
+    const: maxim,max77840-charger-detect
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+        charger {
+                compatible = "maxim,max77840-charger-detect";
+        };
+

Documentation/devicetree/bindings/power/supply/maxim,max77840-charger.yaml

@@ -0,0 +1,60 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/maxim,max77840-charger.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX77840 Charger
+
+maintainers:
+  - Joan Na <joan.na@analog.com>
+
+properties:
+  compatible:
+    const: maxim,max77840-charger
+
+  fast_charge_timer:
+    description: Fast charge timer in hours
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  fast_charge_current:
+    description: Fast charge current in milliamps
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  charge_termination_voltage:
+    description: Charge termination (CV) voltage in millivolts
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  topoff_timer:
+    description: Top-off timer in minutes
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  topoff_current:
+    description: Top-off current in milliamps (mA)
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  restart_threshold:
+    description: Restart threshold in millivolts (mV)
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  input_current_limit:
+    description: Input current limit in milliamps (mA)
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+        charger {
+                compatible = "maxim,max77840-charger";
+                fast_charge_timer = <5>;
+                fast_charge_current = <1500>;
+                charge_termination_voltage = <4200>;
+                topoff_timer = <20>;
+                topoff_current = <100>;
+                restart_threshold = <100>;
+                input_current_limit = <500>;
+        };

Documentation/devicetree/bindings/power/supply/maxim,max77840-fuelgauge.yaml

@@ -0,0 +1,25 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/maxim,max77840-fuelgauge.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX77840 Fuel Gauge
+
+maintainers:
+  - Joan Na <joan.na@analog.com>
+
+properties:
+  compatible:
+    const: maxim,max77840-fuelgauge
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    fuelgauge {
+      compatible = "maxim,max77840-fuelgauge";
+    };

Documentation/devicetree/bindings/regulator/maxim,max77840-regulator.yaml

@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/maxim,max77840-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX77840 Regulator
+
+maintainers:
+  - Joan Na <joan.na@analog.com>
+
+properties:
+  compatible:
+    const: maxim,max77840-regulator
+
+  reg:
+    maxItems: 1
+
+  regulators:
+    type: object
+
+    properties:
+      SAFEOUT1:
+        $ref: regulator.yaml#
+
+    additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - regulators
+
+additionalProperties: false
+
+examples:
+  - |
+
+    regulators {
+      SAFEOUT1 {
+        regulator-name = "SAFEOUT1";
+        regulator-boot-on;
+        regulator-always-on;
+        };
+    };
+

Kconfig.adi

@@ -96,6 +96,9 @@ config KERNEL_ALL_ADI_DRIVERS
 	imply REGULATOR_MAX77857
 	imply REGULATOR_MAX77541
 	imply MFD_MAX77541
+	imply REGULATOR_MAX77840
+	imply CHARGER_MAX77840
+	imply MFD_MAX77840
         imply REGULATOR_ADP5055
 
 source "drivers/clk/Kconfig.adi"

drivers/mfd/Kconfig

@@ -894,6 +894,19 @@ config MFD_MAX77714
 	  drivers must be enabled in order to use each functionality of the
 	  device.
 
+config MFD_MAX77840
+	tristate "Maxim Integrated MAX77840 Charger Support"
+	depends on I2C
+	select MFD_CORE
+	select REGMAP_I2C
+	select REGMAP_IRQ
+	help
+	  Say yes here to add support for Maxim Integrated MAX77840.
+	  This is a 3A Switch Mode Charger with Fuel Gauge.
+	  This driver provides common support for accessing the device,
+	  additional drivers must be enabled in order to use the functionality
+	  of the device.
+
 config MFD_MAX77843
 	bool "Maxim Semiconductor MAX77843 PMIC Support"
 	depends on I2C=y

drivers/mfd/Makefile

@@ -163,6 +163,7 @@ obj-$(CONFIG_MFD_MAX77650)	+= max77650.o
 obj-$(CONFIG_MFD_MAX77686)	+= max77686.o
 obj-$(CONFIG_MFD_MAX77693)	+= max77693.o
 obj-$(CONFIG_MFD_MAX77714)	+= max77714.o
+obj-$(CONFIG_MFD_MAX77840)	+= max77840.o
 obj-$(CONFIG_MFD_MAX77843)	+= max77843.o
 obj-$(CONFIG_MFD_MAX8907)	+= max8907.o
 max8925-objs			:= max8925-core.o max8925-i2c.o