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