Add Richtek RT9467 5A Battery Charger support

new file mode 100644
index 0000000..92c5706
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/supply/richtek,rt9467-charger.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Richtek RT9467 Switching Battery Charger with Power Path Management
+
+maintainers:
+  - ChiYuan Huang <[email protected]>
+  - ChiaEn Wu <[email protected]>
+
+description: |
+  RT9467 is a switch-mode single cell Li-Ion/Li-Polymer battery charger for
+  portable applications. It integrates a synchronous PWM controller, power
+  MOSFETs, input current sensing and regulation, high-accuracy voltage
+  regulation, and charge termination. The charge current is regulated through
+  integrated sensing resistors.
+
+  The RT9467 also features USB On-The-Go (OTG) support. It also integrates
+  D+/D- pin for USB host/charging port detection.
+
+  Datasheet is available at
+  https://www.richtek.com/assets/product_file/RT9467/DS9467-01.pdf
+
+properties:
+  compatible:
+    const: richtek,rt9467-charger
+
+  reg:
+    maxItems: 1
+
+  wakeup-source: true
+
+  interrupts:
+    maxItems: 1
+
+  charge-enable-gpios:
+    description: GPIO is used to turn on and off charging.
+    maxItems: 1
+
+  usb-otg-vbus-regulator:
+    type: object
+    description: OTG boost regulator.
+    unevaluatedProperties: false
+    $ref: /schemas/regulator/regulator.yaml#
+
+    properties:
+      enable-gpios: true
+
+required:
+  - compatible
+  - reg
+  - wakeup-source
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/gpio/gpio.h>
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      charger@5b {
+        compatible = "richtek,rt9467-charger";
+        reg = <0x5b>;
+        wakeup-source;
+        interrupts-extended = <&gpio_intc 32 IRQ_TYPE_LEVEL_LOW>;
+        charge-enable-gpios = <&gpio26 1 GPIO_ACTIVE_LOW>;
+
+        rt9467_otg_vbus: usb-otg-vbus-regulator {
+          regulator-name = "rt9467-usb-otg-vbus";
+          regulator-min-microvolt = <4425000>;
+          regulator-max-microvolt = <5825000>;
+          regulator-min-microamp = <500000>;
+          regulator-max-microamp = <3000000>;
+        };
+      };
+    };

index 1aa8323..4779476 100644
@@ -772,6 +772,25 @@ config CHARGER_RT9455
 	help
 	  Say Y to enable support for Richtek RT9455 battery charger.
 
+config CHARGER_RT9467
+	tristate "Richtek RT9467 Battery Charger Driver"
+	depends on I2C && GPIOLIB && REGULATOR
+	select REGMAP_I2C
+	select REGMAP_IRQ
+	select LINEAR_RANGES
+	help
+	  Say Y here to enable RT9467 Battery Charger.
+	  RT9467 is a switch-mode single cell Li-Ion/Li-Polymer battery charger
+	  for portable applications. It integrates a synchronous PWM controller,
+	  power MOSFETs, input current sensing and regulation, high-accuracy
+	  voltage regulation, and charge termination. The charge current is
+	  regulated through integrated sensing resistors. It also features
+	  USB On-The-Go (OTG) support and integrates D+/D- pin for USB
+	  host/charging port detection.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called "rt9467-charger".
+
 config CHARGER_CROS_USBPD
 	tristate "ChromeOS EC based USBPD charger"
 	depends on CROS_USBPD_NOTIFY

index 7f02f36..ff1e9a0 100644
@@ -57,6 +57,7 @@ obj-$(CONFIG_BATTERY_MAX1721X)	+= max1721x_battery.o
 obj-$(CONFIG_BATTERY_Z2)	+= z2_battery.o
 obj-$(CONFIG_BATTERY_RT5033)	+= rt5033_battery.o
 obj-$(CONFIG_CHARGER_RT9455)	+= rt9455_charger.o
+obj-$(CONFIG_CHARGER_RT9467)	+= rt9467-charger.o
 obj-$(CONFIG_BATTERY_S3C_ADC)	+= s3c_adc_battery.o
 obj-$(CONFIG_BATTERY_TWL4030_MADC)	+= twl4030_madc_battery.o
 obj-$(CONFIG_CHARGER_88PM860X)	+= 88pm860x_charger.o

new file mode 100644
index 0000000..dd0b962
@@ -0,0 +1,19 @@
+What:		/sys/class/power_supply/rt9467-*/sysoff_enable
+Date:		Oct 2022
+KernelVersion:	6.0
+Contact:	ChiaEn Wu <[email protected]>
+Description:
+		This entry allows enabling the sysoff mode of rt9467 charger
+		devices.
+		If enabled and the input is removed, the internal battery FET
+		is turned off to reduce the leakage from the BAT pin. See
+		device datasheet for details. It's commonly used when the
+		product enter shipping stage. After entering shipping mode,
+		only 'VBUS' or 'Power key" pressed can make it leave this mode.
+		'Disable' also can help to leave it, but it's more like to
+		abort the action before the device really enter shipping mode.
+
+		Access: Read, Write
+		Valid values:
+		- 1: enabled
+		- 0: disabled