[RFC 1/5] dt-bindings: mfd: ti,bq25703a: Add TI BQ25703A Charger

[Chris Morgan <macroalpha82@gmail.com>]

From: Chris Morgan <macromorgan@hotmail.com>

Document the Texas instruments BQ25703 series of charger managers/
buck/boost regulators.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
 .../devicetree/bindings/mfd/ti,bq25703a.yaml  | 143 ++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/ti,bq25703a.yaml

diff --git a/Documentation/devicetree/bindings/mfd/ti,bq25703a.yaml b/Documentation/devicetree/bindings/mfd/ti,bq25703a.yaml
new file mode 100644
index 000000000000..e555aa60f9ad
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/ti,bq25703a.yaml
@@ -0,0 +1,143 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/ti,bq25703a.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: BQ25703 Charger Manager/Buck/Boost Converter
+
+maintainers:
+  - Chris Morgan <macromorgan@hotmail.com>
+
+properties:
+  compatible:
+    const: ti,bq25703a
+
+  reg:
+    const: 0x6b
+    description: I2C slave address
+
+  interrupts:
+    maxItems: 1
+
+  power-supplies:
+    description:
+      phandle of the power supply that provides input power
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+  ti,charge-current:
+    description:
+      maximum current to apply to charging the battery
+    minimum: 0
+    maximum: 8128000
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  ti,current-limit:
+    description:
+      maximum total input current allowed
+    minimum: 50000
+    maximum: 6400000
+    default: 3250000
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  ti,max-charge-voltage:
+    description:
+      maximum voltage to apply to charging the battery
+    minimum: 1024000
+    maximum: 19200000
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  ti,minimum-sys-voltage:
+    description:
+      minimum system voltage while on battery power, with default value
+      depending based on cell configuration
+    minimum: 1024000
+    maximum: 16128000
+    default:
+      enum: [3584000, 6144000, 9216000, 16128000]
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  regulators:
+    type: object
+    additionalProperties: false
+    description:
+      Boost converter regulator output of bq257xx
+
+    properties:
+      "usb-otg-vbus":
+        type: object
+        $ref: /schemas/regulator/regulator.yaml
+
+        properties:
+          regulator-name: true
+          regulator-min-microamp:
+            minimum: 0
+            maximum: 6350000
+          regulator-max-microamp:
+            minimum: 0
+            maximum: 6350000
+          regulator-min-microvolt:
+            minimum: 4480000
+            maximum: 20800000
+          regulator-max-microvolt:
+            minimum: 4480000
+            maximum: 20800000
+          enable-gpios:
+            description:
+              The BQ25703 may require both a register write and a GPIO
+              toggle to enable the boost regulator.
+
+        additionalProperties: true
+
+        required:
+          - regulator-name
+          - regulator-min-microamp
+          - regulator-max-microamp
+          - regulator-min-microvolt
+          - regulator-max-microvolt
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - power-supplies
+  - ti,charge-current
+  - ti,current-limit
+  - ti,max-charge-voltage
+  - ti,minimum-sys-voltage
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/pinctrl/rockchip.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        bq25703: bq25703@6b {
+            compatible = "ti,bq25703a";
+            reg = <0x6b>;
+            interrupt-parent = <&gpio0>;
+            interrupts = <RK_PD5 IRQ_TYPE_LEVEL_LOW>;
+            power-supplies = <&fusb302>;
+            ti,charge-current = <2500000>;
+            ti,current-limit = <5000000>;
+            ti,max-charge-voltage = <8750000>;
+            ti,minimum-sys-voltage = <7400000>;
+
+            regulators {
+                usb_otg_vbus: usb-otg-vbus {
+                    enable-gpios = <&gpio4 RK_PA6 GPIO_ACTIVE_HIGH>;
+                    regulator-max-microamp = <960000>;
+                    regulator-max-microvolt = <5088000>;
+                    regulator-min-microamp = <512000>;
+                    regulator-min-microvolt = <4992000>;
+                    regulator-name = "usb_otg_vbus";
+                };
+            };
+        };
+    };
+
+...
-- 
2.34.1