1MediaTek MT6397/MT6323 Multifunction Device Driver
2
3MT6397/MT6323 is a multifunction device with the following sub modules:
4- Regulator
5- RTC
6- Audio codec
7- GPIO
8- Clock
9- LED
10- Keys
11
12It is interfaced to host controller using SPI interface by a proprietary hardware
13called PMIC wrapper or pwrap. MT6397/MT6323 MFD is a child device of pwrap.
14See the following for pwarp node definitions:
15Documentation/devicetree/bindings/soc/mediatek/pwrap.txt
16
17This document describes the binding for MFD device and its sub module.
18
19Required properties:
20compatible: "mediatek,mt6397" or "mediatek,mt6323"
21
22Optional subnodes:
23
24- rtc
25	Required properties:
26		- compatible: "mediatek,mt6397-rtc"
27- regulators
28	Required properties:
29		- compatible: "mediatek,mt6397-regulator"
30	see Documentation/devicetree/bindings/regulator/mt6397-regulator.txt
31		- compatible: "mediatek,mt6323-regulator"
32	see Documentation/devicetree/bindings/regulator/mt6323-regulator.txt
33- codec
34	Required properties:
35		- compatible: "mediatek,mt6397-codec"
36- clk
37	Required properties:
38		- compatible: "mediatek,mt6397-clk"
39- led
40	Required properties:
41		- compatible: "mediatek,mt6323-led"
42	see Documentation/devicetree/bindings/leds/leds-mt6323.txt
43
44- keys
45	Required properties:
46		- compatible: "mediatek,mt6397-keys" or "mediatek,mt6323-keys"
47	see Documentation/devicetree/bindings/input/mtk-pmic-keys.txt
48
49Example:
50	pwrap: pwrap@1000f000 {
51		compatible = "mediatek,mt8135-pwrap";
52
53		...
54
55		pmic {
56			compatible = "mediatek,mt6397";
57
58			codec: mt6397codec {
59				compatible = "mediatek,mt6397-codec";
60			};
61
62			regulators {
63				compatible = "mediatek,mt6397-regulator";
64
65				mt6397_vpca15_reg: buck_vpca15 {
66					regulator-compatible = "buck_vpca15";
67					regulator-name = "vpca15";
68					regulator-min-microvolt = <850000>;
69					regulator-max-microvolt = <1400000>;
70					regulator-ramp-delay = <12500>;
71					regulator-always-on;
72				};
73
74				mt6397_vgp4_reg: ldo_vgp4 {
75					regulator-compatible = "ldo_vgp4";
76					regulator-name = "vgp4";
77					regulator-min-microvolt = <1200000>;
78					regulator-max-microvolt = <3300000>;
79					regulator-enable-ramp-delay = <218>;
80				};
81			};
82		};
83	};
84