arch/arm/boot/dts/overlays/rpi-poe-overlay.dts

   1 /*
   2  * Overlay for the Raspberry Pi POE HAT.
   3  */
   4 /dts-v1/;
   5 /plugin/;
   6
   7 / {
   8         compatible = "brcm,bcm2835";
   9
  10         fragment@0 {
  11                 target-path = "/";
  12                 __overlay__ {
  13                         fan: pwm-fan {
  14                                 compatible = "pwm-fan";
  15                                 cooling-levels = <0 1 10 100 255>;
  16                                 #cooling-cells = <2>;
  17                                 pwms = <&fwpwm 0 80000>;
  18                         };
  19                 };
  20         };
  21
  22         fragment@1 {
  23                 target = <&cpu_thermal>;
  24                 __overlay__ {
  25                         trips {
  26                                 trip0: trip0 {
  27                                         temperature = <40000>;
  28                                         hysteresis = <2000>;
  29                                         type = "active";
  30                                 };
  31                                 trip1: trip1 {
  32                                         temperature = <45000>;
  33                                         hysteresis = <2000>;
  34                                         type = "active";
  35                                 };
  36                                 trip2: trip2 {
  37                                         temperature = <50000>;
  38                                         hysteresis = <2000>;
  39                                         type = "active";
  40                                 };
  41                                 trip3: trip3 {
  42                                         temperature = <55000>;
  43                                         hysteresis = <5000>;
  44                                         type = "active";
  45                                 };
  46                         };
  47                         cooling-maps {
  48                                 map0 {
  49                                         trip = <&trip0>;
  50                                         cooling-device = <&fan 0 1>;
  51                                 };
  52                                 map1 {
  53                                         trip = <&trip1>;
  54                                         cooling-device = <&fan 1 2>;
  55                                 };
  56                                 map2 {
  57                                         trip = <&trip2>;
  58                                         cooling-device = <&fan 2 3>;
  59                                 };
  60                                 map3 {
  61                                         trip = <&trip3>;
  62                                         cooling-device = <&fan 3 4>;
  63                                 };
  64                         };
  65                 };
  66         };
  67
  68         fragment@2 {
  69                 target-path = "/__overrides__";
  70                 params: __overlay__ {
  71                         poe_fan_temp0 =         <&trip0>,"temperature:0";
  72                         poe_fan_temp0_hyst =    <&trip0>,"hysteresis:0";
  73                         poe_fan_temp1 =         <&trip1>,"temperature:0";
  74                         poe_fan_temp1_hyst =    <&trip1>,"hysteresis:0";
  75                         poe_fan_temp2 =         <&trip2>,"temperature:0";
  76                         poe_fan_temp2_hyst =    <&trip2>,"hysteresis:0";
  77                         poe_fan_temp3 =         <&trip3>,"temperature:0";
  78                         poe_fan_temp3_hyst =    <&trip3>,"hysteresis:0";
  79                         poe_fan_i2c =           <&fwpwm>,"status=disabled",
  80                                                 <&poe_mfd>,"status=okay",
  81                                                 <&fan>,"pwms:0=",<&poe_mfd_pwm>;
  82                 };
  83         };
  84
  85         fragment@3 {
  86                 target = <&firmware>;
  87                 __overlay__ {
  88                         fwpwm: pwm {
  89                                 compatible = "raspberrypi,firmware-poe-pwm";
  90                                 #pwm-cells = <2>;
  91                         };
  92                 };
  93         };
  94
  95         fragment@4 {
  96                 target = <&i2c0>;
  97                 i2c_bus: __overlay__ {
  98                         #address-cells = <1>;
  99                         #size-cells = <0>;
 100
 101                         poe_mfd: poe@51 {
 102                                 compatible = "raspberrypi,poe-core";
 103                                 reg = <0x51>;
 104                                 status = "disabled";
 105
 106                                 poe_mfd_pwm: poe_pwm@f0 {
 107                                         compatible = "raspberrypi,poe-pwm";
 108                                         reg = <0xf0>;
 109                                         status = "okay";
 110                                         #pwm-cells = <2>;
 111                                 };
 112                         };
 113                 };
 114         };
 115
 116         fragment@5 {
 117                 target = <&i2c0if>;
 118                 __dormant__ {
 119                         status = "okay";
 120                 };
 121         };
 122
 123         fragment@6 {
 124                 target = <&i2c0mux>;
 125                 __dormant__ {
 126                         status = "okay";
 127                 };
 128         };
 129
 130         __overrides__ {
 131                 poe_fan_temp0 =         <&trip0>,"temperature:0";
 132                 poe_fan_temp0_hyst =    <&trip0>,"hysteresis:0";
 133                 poe_fan_temp1 =         <&trip1>,"temperature:0";
 134                 poe_fan_temp1_hyst =    <&trip1>,"hysteresis:0";
 135                 poe_fan_temp2 =         <&trip2>,"temperature:0";
 136                 poe_fan_temp2_hyst =    <&trip2>,"hysteresis:0";
 137                 poe_fan_temp3 =         <&trip3>,"temperature:0";
 138                 poe_fan_temp3_hyst =    <&trip3>,"hysteresis:0";
 139                 i2c =                   <0>, "+5+6",
 140                                         <&fwpwm>,"status=disabled",
 141                                         <&i2c_bus>,"status=okay",
 142                                         <&poe_mfd>,"status=okay",
 143                                         <&fan>,"pwms:0=",<&poe_mfd_pwm>;
 144         };
 145 };