arch/arm/boot/dts/overlays/pitft22-overlay.dts

   1 /*
   2  * Device Tree overlay for pitft by Adafruit
   3  *
   4  */
   5
   6 /dts-v1/;
   7 /plugin/;
   8
   9 / {
  10         compatible = "brcm,bcm2835";
  11
  12         fragment@0 {
  13                 target = <&spidev0>;
  14                 __overlay__ {
  15                         status = "disabled";
  16                 };
  17         };
  18
  19         fragment@1 {
  20                 target = <&spidev1>;
  21                 __overlay__ {
  22                         status = "disabled";
  23                 };
  24         };
  25
  26         fragment@2 {
  27                 target = <&gpio>;
  28                 __overlay__ {
  29                         pitft_pins: pitft_pins {
  30                                 brcm,pins = <25>;
  31                                 brcm,function = <1>; /* out */
  32                                 brcm,pull = <0>; /* none */
  33                         };
  34                 };
  35         };
  36
  37         fragment@3 {
  38                 target = <&spi0>;
  39                 __overlay__ {
  40                         /* needed to avoid dtc warning */
  41                         #address-cells = <1>;
  42                         #size-cells = <0>;
  43                         status = "okay";
  44
  45                         pitft: pitft@0{
  46                                 compatible = "ilitek,ili9340";
  47                                 reg = <0>;
  48                                 pinctrl-names = "default";
  49                                 pinctrl-0 = <&pitft_pins>;
  50
  51                                 spi-max-frequency = <32000000>;
  52                                 rotate = <90>;
  53                                 fps = <25>;
  54                                 bgr;
  55                                 buswidth = <8>;
  56                                 dc-gpios = <&gpio 25 0>;
  57                                 debug = <0>;
  58                         };
  59
  60                 };
  61         };
  62
  63         __overrides__ {
  64                 speed =   <&pitft>,"spi-max-frequency:0";
  65                 rotate =  <&pitft>,"rotate:0";
  66                 fps =     <&pitft>,"fps:0";
  67                 debug =   <&pitft>,"debug:0";
  68         };
  69 };