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