arch/arm/boot/dts/overlays/hy28a-overlay.dts

   1 /*
   2  * Device Tree overlay for HY28A display
   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                         hy28a_pins: hy28a_pins {
  37                                 brcm,pins = <17 25 18>;
  38                                 brcm,function = <0 1 1>; /* in 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                         hy28a: hy28a@0{
  51                                 compatible = "ilitek,ili9320";
  52                                 reg = <0>;
  53                                 pinctrl-names = "default";
  54                                 pinctrl-0 = <&hy28a_pins>;
  55
  56                                 spi-max-frequency = <32000000>;
  57                                 spi-cpol;
  58                                 spi-cpha;
  59                                 rotate = <270>;
  60                                 bgr;
  61                                 fps = <50>;
  62                                 buswidth = <8>;
  63                                 startbyte = <0x70>;
  64                                 reset-gpios = <&gpio 25 1>;
  65                                 led-gpios = <&gpio 18 1>;
  66                                 debug = <0>;
  67                         };
  68
  69                         hy28a_ts: hy28a-ts@1 {
  70                                 compatible = "ti,ads7846";
  71                                 reg = <1>;
  72
  73                                 spi-max-frequency = <2000000>;
  74                                 interrupts = <17 2>; /* high-to-low edge triggered */
  75                                 interrupt-parent = <&gpio>;
  76                                 pendown-gpio = <&gpio 17 0>;
  77                                 ti,x-plate-ohms = /bits/ 16 <100>;
  78                                 ti,pressure-max = /bits/ 16 <255>;
  79                         };
  80                 };
  81         };
  82         __overrides__ {
  83                 speed =         <&hy28a>,"spi-max-frequency:0";
  84                 rotate =        <&hy28a>,"rotate:0";
  85                 fps =           <&hy28a>,"fps:0";
  86                 debug =         <&hy28a>,"debug:0";
  87                 xohms =         <&hy28a_ts>,"ti,x-plate-ohms;0";
  88                 resetgpio =     <&hy28a>,"reset-gpios:4",
  89                                 <&hy28a_pins>, "brcm,pins:4";
  90                 ledgpio =       <&hy28a>,"led-gpios:4",
  91                                 <&hy28a_pins>, "brcm,pins:8";
  92         };
  93 };