arch/arm/boot/dts/overlays/piscreen2r-overlay.dts

   1  /*
   2  * Device Tree overlay for PiScreen2 3.5" TFT with resistive touch  by Ozzmaker.com
   3  *
   4  */
   5
   6 /dts-v1/;
   7 /plugin/;
   8
   9 / {
  10         compatible = "brcm,bcm2835";
  11
  12         fragment@0 {
  13                 target = <&spi0>;
  14                 __overlay__ {
  15                         status = "okay";
  16                 };
  17         };
  18
  19         fragment@1 {
  20                 target = <&spidev0>;
  21                 __overlay__ {
  22                         status = "disabled";
  23                 };
  24         };
  25
  26         fragment@2 {
  27                 target = <&spidev1>;
  28                 __overlay__ {
  29                         status = "disabled";
  30                 };
  31         };
  32
  33         fragment@3 {
  34                 target = <&gpio>;
  35                 __overlay__ {
  36                         piscreen2_pins: piscreen2_pins {
  37                                 brcm,pins = <17 25 24 22>;
  38                                 brcm,function = <0 1 1 1>; /* in out out out */
  39                         };
  40                 };
  41         };
  42
  43         fragment@4 {
  44                 target = <&spi0>;
  45                 __overlay__ {
  46                         /* needed to avoid dtc warning */
  47                         #address-cells = <1>;
  48                         #size-cells = <0>;
  49
  50                         piscreen2: piscreen2@0{
  51                                 compatible = "ilitek,ili9486";
  52                                 reg = <0>;
  53                                 pinctrl-names = "default";
  54                                 pinctrl-0 = <&piscreen2_pins>;
  55                                 bgr;
  56                                 spi-max-frequency = <64000000>;
  57                                 rotate = <90>;
  58                                 fps = <30>;
  59                                 buswidth = <8>;
  60                                 regwidth = <16>;
  61                                 txbuflen = <32768>;
  62                                 reset-gpios = <&gpio 25 1>;
  63                                 dc-gpios = <&gpio 24 0>;
  64                                 led-gpios = <&gpio 22 0>;
  65                                 debug = <0>;
  66
  67                                 init = <0x10000b0 0x00
  68                                         0x1000011
  69                                         0x20000ff
  70                                         0x100003a 0x55
  71                                         0x1000036 0x28
  72                                         0x10000c0 0x11 0x09
  73                                         0x10000c1 0x41
  74                                         0x10000c5 0x00 0x00 0x00 0x00
  75                                         0x10000b6 0x00 0x02
  76                                         0x10000f7 0xa9 0x51 0x2c 0x2
  77                                         0x10000be 0x00 0x04
  78                                         0x10000e9 0x00
  79                                         0x1000011
  80                                         0x1000029>;
  81
  82                         };
  83
  84                         piscreen2_ts: piscreen2-ts@1 {
  85                                 compatible = "ti,ads7846";
  86                                 reg = <1>;
  87
  88                                 spi-max-frequency = <2000000>;
  89                                 interrupts = <17 2>; /* high-to-low edge triggered */
  90                                 interrupt-parent = <&gpio>;
  91                                 pendown-gpio = <&gpio 17 0>;
  92                                 ti,swap-xy;
  93                                 ti,x-plate-ohms = /bits/ 16 <100>;
  94                                 ti,pressure-max = /bits/ 16 <255>;
  95                         };
  96                 };
  97         };
  98         __overrides__ {
  99                 speed =         <&piscreen2>,"spi-max-frequency:0";
 100                 rotate =        <&piscreen2>,"rotate:0";
 101                 fps =           <&piscreen2>,"fps:0";
 102                 debug =         <&piscreen2>,"debug:0";
 103                 xohms =         <&piscreen2_ts>,"ti,x-plate-ohms;0";
 104         };
 105 };
 106