xref: /linux/Documentation/devicetree/bindings/power/supply/richtek,rt9455.yaml (revision da1d9caf95def6f0320819cf941c9fd1069ba9e1) 
1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: "http://devicetree.org/schemas/power/supply/richtek,rt9455.yaml#"
5$schema: "http://devicetree.org/meta-schemas/core.yaml#"
6
7title: Binding for Richtek rt9455 battery charger
8
9maintainers:
10  - Sebastian Reichel <sre@kernel.org>
11
12allOf:
13  - $ref: power-supply.yaml#
14
15properties:
16  compatible:
17    const: richtek,rt9455
18
19  reg:
20    maxItems: 1
21
22  interrupts:
23    maxItems: 1
24
25  richtek,output-charge-current:
26    $ref: /schemas/types.yaml#/definitions/uint32
27    description: output current from the charger to the battery, in uA.
28
29  richtek,end-of-charge-percentage:
30    $ref: /schemas/types.yaml#/definitions/uint32
31    description: |
32      percent of the output charge current. When the current in constant-voltage phase drops
33      below output_charge_current x end-of-charge-percentage, charge is terminated.
34
35  richtek,battery-regulation-voltage:
36    $ref: /schemas/types.yaml#/definitions/uint32
37    description: maximum battery voltage in uV.
38
39  richtek,boost-output-voltage:
40    $ref: /schemas/types.yaml#/definitions/uint32
41    description: |
42      maximum voltage provided to consumer devices, when the charger is in boost mode, in uV.
43
44  richtek,min-input-voltage-regulation:
45    $ref: /schemas/types.yaml#/definitions/uint32
46    description: |
47      input voltage level in uV, used to decrease voltage level when the over current of the
48      input power source occurs. This prevents input voltage drop due to insufficient
49      current provided by the power source. Defaults to 4500000 uV (4.5V).
50
51  richtek,avg-input-current-regulation:
52    $ref: /schemas/types.yaml#/definitions/uint32
53    description: |
54      input current value in uA drained by the charger from the power source.
55      Defaults to 500000 uA (500mA).
56
57required:
58  - compatible
59  - reg
60  - interrupts
61  - richtek,output-charge-current
62  - richtek,end-of-charge-percentage
63  - richtek,battery-regulation-voltage
64  - richtek,boost-output-voltage
65
66additionalProperties: false
67
68examples:
69  - |
70    #include <dt-bindings/interrupt-controller/irq.h>
71    i2c0 {
72      #address-cells = <1>;
73      #size-cells = <0>;
74
75      charger@22 {
76        compatible = "richtek,rt9455";
77        reg = <0x22>;
78
79        interrupt-parent = <&gpio1>;
80        interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
81
82        richtek,output-charge-current	    = <500000>;
83        richtek,end-of-charge-percentage    = <10>;
84        richtek,battery-regulation-voltage  = <4200000>;
85        richtek,boost-output-voltage	    = <5050000>;
86
87        richtek,min-input-voltage-regulation = <4500000>;
88        richtek,avg-input-current-regulation = <500000>;
89      };
90    };
91