Documentation/devicetree/bindings/mfd/mt6397.txt

   1 MediaTek MT6397 Multifunction Device Driver
   2
   3 MT6397 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 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"
  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 - codec
  30         Required properties:
  31                 - compatible: "mediatek,mt6397-codec"
  32 - clk
  33         Required properties:
  34                 - compatible: "mediatek,mt6397-clk"
  35
  36 Example:
  37         pwrap: pwrap@1000f000 {
  38                 compatible = "mediatek,mt8135-pwrap";
  39
  40                 ...
  41
  42                 pmic {
  43                         compatible = "mediatek,mt6397";
  44
  45                         codec: mt6397codec {
  46                                 compatible = "mediatek,mt6397-codec";
  47                         };
  48
  49                         regulators {
  50                                 compatible = "mediatek,mt6397-regulator";
  51
  52                                 mt6397_vpca15_reg: buck_vpca15 {
  53                                         regulator-compatible = "buck_vpca15";
  54                                         regulator-name = "vpca15";
  55                                         regulator-min-microvolt = <850000>;
  56                                         regulator-max-microvolt = <1400000>;
  57                                         regulator-ramp-delay = <12500>;
  58                                         regulator-always-on;
  59                                 };
  60
  61                                 mt6397_vgp4_reg: ldo_vgp4 {
  62                                         regulator-compatible = "ldo_vgp4";
  63                                         regulator-name = "vgp4";
  64                                         regulator-min-microvolt = <1200000>;
  65                                         regulator-max-microvolt = <3300000>;
  66                                         regulator-enable-ramp-delay = <218>;
  67                                 };
  68                         };
  69                 };
  70         };