arch/arm/boot/dts/overlays/papirus-overlay.dts

   1 /* PaPiRus ePaper Screen by Pi Supply */
   2
   3 /dts-v1/;
   4 /plugin/;
   5
   6 / {
   7         compatible = "brcm,bcm2835";
   8
   9         fragment@0 {
  10                 target = <&i2c_arm>;
  11                 __overlay__ {
  12                         #address-cells = <1>;
  13                         #size-cells = <0>;
  14                         status = "okay";
  15
  16                         display_temp: lm75@48 {
  17                                 compatible = "lm75b";
  18                                 reg = <0x48>;
  19                                 status = "okay";
  20                                 #thermal-sensor-cells = <0>;
  21                         };
  22                 };
  23         };
  24
  25         fragment@1 {
  26                 target-path = "/thermal-zones";
  27                 __overlay__ {
  28                         display {
  29                                 polling-delay-passive = <0>;
  30                                 polling-delay = <0>;
  31                                 thermal-sensors = <&display_temp>;
  32                         };
  33                 };
  34         };
  35
  36         fragment@2 {
  37                 target = <&spidev0>;
  38                 __overlay__ {
  39                         status = "disabled";
  40                 };
  41         };
  42
  43         fragment@3 {
  44                 target = <&gpio>;
  45                 __overlay__ {
  46                         repaper_pins: repaper_pins {
  47                                 brcm,pins = <14 15 23 24 25>;
  48                                 brcm,function = <1 1 1 1 0>; /* out out out out in */
  49                         };
  50                 };
  51         };
  52
  53         fragment@4 {
  54                 target = <&spi0>;
  55                 __overlay__ {
  56                         /* needed to avoid dtc warning */
  57                         #address-cells = <1>;
  58                         #size-cells = <0>;
  59                         status = "okay";
  60
  61                         repaper: repaper@0{
  62                                 compatible = "not_set";
  63                                 reg = <0>;
  64                                 pinctrl-names = "default";
  65                                 pinctrl-0 = <&repaper_pins>;
  66
  67                                 spi-max-frequency = <8000000>;
  68
  69                                 panel-on-gpios = <&gpio 23 0>;
  70                                 border-gpios = <&gpio 14 0>;
  71                                 discharge-gpios = <&gpio 15 0>;
  72                                 reset-gpios = <&gpio 24 0>;
  73                                 busy-gpios = <&gpio 25 0>;
  74
  75                                 repaper-thermal-zone = "display";
  76                         };
  77                 };
  78         };
  79
  80         __overrides__ {
  81                 panel = <&repaper>, "compatible";
  82                 speed = <&repaper>, "spi-max-frequency:0";
  83         };
  84 };