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