arch/arm/boot/dts/overlays/i2c-fan-overlay.dts

   1 // Definitions for I2C based sensors using the Industrial IO or HWMON interface.
   2 /dts-v1/;
   3 /plugin/;
   4
   5 #include <dt-bindings/thermal/thermal.h>
   6
   7 / {
   8         compatible = "brcm,bcm2835";
   9
  10         fragment@0 {
  11                 target = <&i2cbus>;
  12                 __dormant__ {
  13                         #address-cells = <1>;
  14                         #size-cells = <0>;
  15                         status = "okay";
  16
  17                         emc2301: emc2301@2f {
  18                                 compatible = "microchip,emc2301";
  19                                 reg = <0x2f>;
  20                                 status = "okay";
  21                                 #cooling-cells = <0x02>;
  22                         };
  23                 };
  24         };
  25
  26         frag100: fragment@100 {
  27                 target = <&i2c_arm>;
  28                 i2cbus: __overlay__ {
  29                         status = "okay";
  30                 };
  31         };
  32
  33         fragment@101 {
  34                 target = <&i2c0if>;
  35                 __dormant__ {
  36                         status = "okay";
  37                 };
  38         };
  39
  40         fragment@102 {
  41                 target = <&i2c0mux>;
  42                 __dormant__ {
  43                         status = "okay";
  44                 };
  45         };
  46
  47         fragment@103 {
  48                 target = <&cpu_thermal>;
  49                 polling-delay = <2000>; /* milliseconds */
  50                 __overlay__ {
  51                         trips {
  52                                 fanmid0: fanmid0 {
  53                                         temperature = <50000>;
  54                                         hysteresis = <2000>;
  55                                         type = "active";
  56                                 };
  57                                 fanmax0: fanmax0 {
  58                                         temperature = <75000>;
  59                                         hysteresis = <2000>;
  60                                         type = "active";
  61                                 };
  62                         };
  63                         cooling-maps {
  64                                 map0: map0 {
  65                                         trip = <&fanmid0>;
  66                                         cooling-device = <&emc2301 2 6>;
  67                                 };
  68                                 map1: map1 {
  69                                         trip = <&fanmax0>;
  70                                         cooling-device = <&emc2301 7 THERMAL_NO_LIMIT>;
  71                                 };
  72                         };
  73                 };
  74         };
  75
  76         __overrides__ {
  77                 i2c0 =          <&frag100>,"target:0=",<&i2c0>;
  78                 i2c_csi_dsi =   <&frag100>,"target:0=",<&i2c_csi_dsi>,
  79                                 <0>,"+101+102";
  80                 i2c3 = <&frag100>, "target?=0",
  81                        <&frag100>, "target-path=i2c3";
  82                 i2c4 = <&frag100>, "target?=0",
  83                        <&frag100>, "target-path=i2c4";
  84                 i2c5 = <&frag100>, "target?=0",
  85                        <&frag100>, "target-path=i2c5";
  86                 i2c6 = <&frag100>, "target?=0",
  87                        <&frag100>, "target-path=i2c6";
  88                 addr =          <&emc2301>,"reg:0";
  89                 minpwm =        <&emc2301>,"emc2305,pwm-min;0";
  90                 maxpwm =        <&emc2301>,"emc2305,pwm-max;0";
  91                 midtemp =       <&fanmid0>,"temperature:0";
  92                 midtemp_hyst =  <&fanmid0>,"hysteresis:0";
  93                 maxtemp =       <&fanmax0>,"temperature:0";
  94                 maxtemp_hyst =  <&fanmax0>,"hysteresis:0";
  95
  96                 emc2301 =       <0>,"+0",
  97                                 <&map0>,"cooling-device:0=",<&emc2301>,
  98                                 <&map1>,"cooling-device:0=",<&emc2301>;
  99         };
 100 };