tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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- Power controller
12
13It is interfaced to host controller using SPI interface by a proprietary hardware
14called PMIC wrapper or pwrap. MT6397/MT6323 MFD is a child device of pwrap.
15See the following for pwarp node definitions:
16../soc/mediatek/mediatek,pwrap.yaml
17
18This document describes the binding for MFD device and its sub module.
19
20Required properties:
21compatible:
22 "mediatek,mt6323" for PMIC MT6323
23 "mediatek,mt6331" for PMIC MT6331 and MT6332
24 "mediatek,mt6357" for PMIC MT6357
25 "mediatek,mt6358" for PMIC MT6358 and MT6366
26 "mediatek,mt6359" for PMIC MT6359
27 "mediatek,mt6397" for PMIC MT6397
28
29Optional subnodes:
30
31- rtc
32 Required properties: Should be one of follows
33 - compatible: "mediatek,mt6323-rtc"
34 - compatible: "mediatek,mt6331-rtc"
35 - compatible: "mediatek,mt6358-rtc"
36 - compatible: "mediatek,mt6397-rtc"
37 For details, see ../rtc/rtc-mt6397.txt
38- regulators
39 Required properties:
40 - compatible: "mediatek,mt6323-regulator"
41 see ../regulator/mt6323-regulator.txt
42 - compatible: "mediatek,mt6358-regulator"
43 see ../regulator/mt6358-regulator.txt
44 - compatible: "mediatek,mt6397-regulator"
45 see ../regulator/mt6397-regulator.txt
46- codec
47 Required properties:
48 - compatible: "mediatek,mt6397-codec" or "mediatek,mt6358-sound"
49- clk
50 Required properties:
51 - compatible: "mediatek,mt6397-clk"
52- led
53 Required properties:
54 - compatible: "mediatek,mt6323-led"
55 see ../leds/leds-mt6323.txt
56
57- keys
58 Required properties: Should be one of the following
59 - compatible: "mediatek,mt6323-keys"
60 - compatible: "mediatek,mt6331-keys"
61 - compatible: "mediatek,mt6397-keys"
62 see ../input/mtk-pmic-keys.txt
63
64- power-controller
65 Required properties:
66 - compatible: "mediatek,mt6323-pwrc"
67 For details, see ../power/reset/mt6323-poweroff.txt
68
69- pin-controller
70 Required properties:
71 - compatible: "mediatek,mt6397-pinctrl"
72 For details, see ../pinctrl/pinctrl-mt65xx.txt
73
74Example:
75 pwrap: pwrap@1000f000 {
76 compatible = "mediatek,mt8135-pwrap";
77
78 ...
79
80 pmic {
81 compatible = "mediatek,mt6397";
82
83 codec: mt6397codec {
84 compatible = "mediatek,mt6397-codec";
85 };
86
87 regulators {
88 compatible = "mediatek,mt6397-regulator";
89
90 mt6397_vpca15_reg: buck_vpca15 {
91 regulator-compatible = "buck_vpca15";
92 regulator-name = "vpca15";
93 regulator-min-microvolt = <850000>;
94 regulator-max-microvolt = <1400000>;
95 regulator-ramp-delay = <12500>;
96 regulator-always-on;
97 };
98
99 mt6397_vgp4_reg: ldo_vgp4 {
100 regulator-compatible = "ldo_vgp4";
101 regulator-name = "vgp4";
102 regulator-min-microvolt = <1200000>;
103 regulator-max-microvolt = <3300000>;
104 regulator-enable-ramp-delay = <218>;
105 };
106 };
107 };
108 };