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