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:
  22         "mediatek,mt6323" for PMIC MT6323
  23         "mediatek,mt6358" for PMIC MT6358
  24         "mediatek,mt6397" for PMIC MT6397
  25
  26 Optional subnodes:
  27
  28 - rtc
  29         Required properties: Should be one of follows
  30                 - compatible: "mediatek,mt6323-rtc"
  31                 - compatible: "mediatek,mt6358-rtc"
  32                 - compatible: "mediatek,mt6397-rtc"
  33         For details, see ../rtc/rtc-mt6397.txt
  34 - regulators
  35         Required properties:
  36                 - compatible: "mediatek,mt6323-regulator"
  37         see ../regulator/mt6323-regulator.txt
  38                 - compatible: "mediatek,mt6358-regulator"
  39         see ../regulator/mt6358-regulator.txt
  40                 - compatible: "mediatek,mt6397-regulator"
  41         see ../regulator/mt6397-regulator.txt
  42 - codec
  43         Required properties:
  44                 - compatible: "mediatek,mt6397-codec" or "mediatek,mt6358-sound"
  45 - clk
  46         Required properties:
  47                 - compatible: "mediatek,mt6397-clk"
  48 - led
  49         Required properties:
  50                 - compatible: "mediatek,mt6323-led"
  51         see ../leds/leds-mt6323.txt
  52
  53 - keys
  54         Required properties:
  55                 - compatible: "mediatek,mt6397-keys" or "mediatek,mt6323-keys"
  56         see ../input/mtk-pmic-keys.txt
  57
  58 - power-controller
  59         Required properties:
  60                 - compatible: "mediatek,mt6323-pwrc"
  61         For details, see ../power/reset/mt6323-poweroff.txt
  62
  63 - pin-controller
  64         Required properties:
  65                 - compatible: "mediatek,mt6397-pinctrl"
  66         For details, see ../pinctrl/pinctrl-mt65xx.txt
  67
  68 Example:
  69         pwrap: pwrap@1000f000 {
  70                 compatible = "mediatek,mt8135-pwrap";
  71
  72                 ...
  73
  74                 pmic {
  75                         compatible = "mediatek,mt6397";
  76
  77                         codec: mt6397codec {
  78                                 compatible = "mediatek,mt6397-codec";
  79                         };
  80
  81                         regulators {
  82                                 compatible = "mediatek,mt6397-regulator";
  83
  84                                 mt6397_vpca15_reg: buck_vpca15 {
  85                                         regulator-compatible = "buck_vpca15";
  86                                         regulator-name = "vpca15";
  87                                         regulator-min-microvolt = <850000>;
  88                                         regulator-max-microvolt = <1400000>;
  89                                         regulator-ramp-delay = <12500>;
  90                                         regulator-always-on;
  91                                 };
  92
  93                                 mt6397_vgp4_reg: ldo_vgp4 {
  94                                         regulator-compatible = "ldo_vgp4";
  95                                         regulator-name = "vgp4";
  96                                         regulator-min-microvolt = <1200000>;
  97                                         regulator-max-microvolt = <3300000>;
  98                                         regulator-enable-ramp-delay = <218>;
  99                                 };
 100                         };
 101                 };
 102         };