1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/power/supply/sc27xx-fg.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Spreadtrum SC27XX PMICs Fuel Gauge Unit Power Supply
8
9 maintainers:
10 - Sebastian Reichel <sre@kernel.org>
11
12 allOf:
13 - $ref: power-supply.yaml#
14
15 properties:
16 compatible:
17 enum:
18 - sprd,sc2720-fgu
19 - sprd,sc2721-fgu
20 - sprd,sc2723-fgu
21 - sprd,sc2730-fgu
22 - sprd,sc2731-fgu
23
24 reg:
25 maxItems: 1
26
27 battery-detect-gpios:
28 maxItems: 1
29
30 interrupts:
31 maxItems: 1
32
33 io-channels:
34 items:
35 - description: Battery Temperature ADC
36 - description: Battery Charge Voltage ADC
37
38 io-channel-names:
39 items:
40 - const: bat-temp
41 - const: charge-vol
42
43 nvmem-cells:
44 maxItems: 1
45 description: Calibration cells provided by eFuse device
46
47 nvmem-cell-names:
48 const: fgu_calib
49
50 sprd,calib-resistance-micro-ohms:
51 description: real resistance of coulomb counter chip in micro Ohms
52
53 monitored-battery: true
54
55 required:
56 - compatible
57 - reg
58 - battery-detect-gpios
59 - interrupts
60 - io-channels
61 - io-channel-names
62 - nvmem-cells
63 - nvmem-cell-names
64 - sprd,calib-resistance-micro-ohms
65 - monitored-battery
66
67 additionalProperties: false
68
69 examples:
70 - |
71 #include <dt-bindings/gpio/gpio.h>
72 bat: battery {
73 compatible = "simple-battery";
74 charge-full-design-microamp-hours = <1900000>;
75 constant-charge-voltage-max-microvolt = <4350000>;
76 ocv-capacity-celsius = <20>;
77 ocv-capacity-table-0 = <4185000 100>, <4113000 95>, <4066000 90>,
78 <4022000 85>, <3983000 80>, <3949000 75>,
79 <3917000 70>, <3889000 65>, <3864000 60>,
80 <3835000 55>, <3805000 50>, <3787000 45>,
81 <3777000 40>, <3773000 35>, <3770000 30>,
82 <3765000 25>, <3752000 20>, <3724000 15>,
83 <3680000 10>, <3605000 5>, <3400000 0>;
84 // ...
85 };
86
87 pmic {
88 #address-cells = <1>;
89 #size-cells = <0>;
90
91 battery@a00 {
92 compatible = "sprd,sc2731-fgu";
93 reg = <0xa00>;
94 battery-detect-gpios = <&pmic_eic 9 GPIO_ACTIVE_HIGH>;
95 interrupt-parent = <&sc2731_pmic>;
96 interrupts = <4>;
97 io-channels = <&pmic_adc 5>, <&pmic_adc 14>;
98 io-channel-names = "bat-temp", "charge-vol";
99 nvmem-cells = <&fgu_calib>;
100 nvmem-cell-names = "fgu_calib";
101 monitored-battery = <&bat>;
102 sprd,calib-resistance-micro-ohms = <21500>;
103 };
104 };
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