Documentation/devicetree/bindings/mfd/mt6397.txt

   1 MediaTek MT6397/MT6323 Multifunction Device Driver
   2
   3 MT6397/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
  13 It is interfaced to host controller using SPI interface by a proprietary hardware
  14 called PMIC wrapper or pwrap. MT6397/MT6323 MFD is a child device of pwrap.
  15 See the following for pwarp node definitions:
  16 ../soc/mediatek/pwrap.txt
  17
  18 This document describes the binding for MFD device and its sub module.
  19
  20 Required properties:
  21 compatible: "mediatek,mt6397" or "mediatek,mt6323"
  22
  23 Optional subnodes:
  24
  25 - rtc
  26         Required properties: Should be one of follows
  27                 - compatible: "mediatek,mt6323-rtc"
  28                 - compatible: "mediatek,mt6397-rtc"
  29         For details, see ../rtc/rtc-mt6397.txt
  30 - regulators
  31         Required properties:
  32                 - compatible: "mediatek,mt6397-regulator"
  33         see ../regulator/mt6397-regulator.txt
  34                 - compatible: "mediatek,mt6323-regulator"
  35         see ../regulator/mt6323-regulator.txt
  36 - codec
  37         Required properties:
  38                 - compatible: "mediatek,mt6397-codec"
  39 - clk
  40         Required properties:
  41                 - compatible: "mediatek,mt6397-clk"
  42 - led
  43         Required properties:
  44                 - compatible: "mediatek,mt6323-led"
  45         see ../leds/leds-mt6323.txt
  46
  47 - keys
  48         Required properties:
  49                 - compatible: "mediatek,mt6397-keys" or "mediatek,mt6323-keys"
  50         see ../input/mtk-pmic-keys.txt
  51
  52 - power-controller
  53         Required properties:
  54                 - compatible: "mediatek,mt6323-pwrc"
  55         For details, see ../power/reset/mt6323-poweroff.txt
  56
  57 Example:
  58         pwrap: pwrap@1000f000 {
  59                 compatible = "mediatek,mt8135-pwrap";
  60
  61                 ...
  62
  63                 pmic {
  64                         compatible = "mediatek,mt6397";
  65
  66                         codec: mt6397codec {
  67                                 compatible = "mediatek,mt6397-codec";
  68                         };
  69
  70                         regulators {
  71                                 compatible = "mediatek,mt6397-regulator";
  72
  73                                 mt6397_vpca15_reg: buck_vpca15 {
  74                                         regulator-compatible = "buck_vpca15";
  75                                         regulator-name = "vpca15";
  76                                         regulator-min-microvolt = <850000>;
  77                                         regulator-max-microvolt = <1400000>;
  78                                         regulator-ramp-delay = <12500>;
  79                                         regulator-always-on;
  80                                 };
  81
  82                                 mt6397_vgp4_reg: ldo_vgp4 {
  83                                         regulator-compatible = "ldo_vgp4";
  84                                         regulator-name = "vgp4";
  85                                         regulator-min-microvolt = <1200000>;
  86                                         regulator-max-microvolt = <3300000>;
  87                                         regulator-enable-ramp-delay = <218>;
  88                                 };
  89                         };
  90                 };
  91         };