arch/arm/boot/dts/overlays/hy28b-overlay.dts

   1 /*
   2  * Device Tree overlay for HY28b display shield by Texy
   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                         hy28b_pins: hy28b_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                         hy28b: hy28b@0{
  51                                 compatible = "ilitek,ili9325";
  52                                 reg = <0>;
  53                                 pinctrl-names = "default";
  54                                 pinctrl-0 = <&hy28b_pins>;
  55
  56                                 spi-max-frequency = <48000000>;
  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
  67                                 gamma = "04 1F 4 7 7 0 7 7 6 0\n0F 00 1 7 4 0 0 0 6 7";
  68
  69                                 init = <0x10000e7 0x0010
  70                                         0x1000000 0x0001
  71                                         0x1000001 0x0100
  72                                         0x1000002 0x0700
  73                                         0x1000003 0x1030
  74                                         0x1000004 0x0000
  75                                         0x1000008 0x0207
  76                                         0x1000009 0x0000
  77                                         0x100000a 0x0000
  78                                         0x100000c 0x0001
  79                                         0x100000d 0x0000
  80                                         0x100000f 0x0000
  81                                         0x1000010 0x0000
  82                                         0x1000011 0x0007
  83                                         0x1000012 0x0000
  84                                         0x1000013 0x0000
  85                                         0x2000032
  86                                         0x1000010 0x1590
  87                                         0x1000011 0x0227
  88                                         0x2000032
  89                                         0x1000012 0x009c
  90                                         0x2000032
  91                                         0x1000013 0x1900
  92                                         0x1000029 0x0023
  93                                         0x100002b 0x000e
  94                                         0x2000032
  95                                         0x1000020 0x0000
  96                                         0x1000021 0x0000
  97                                         0x2000032
  98                                         0x1000050 0x0000
  99                                         0x1000051 0x00ef
 100                                         0x1000052 0x0000
 101                                         0x1000053 0x013f
 102                                         0x1000060 0xa700
 103                                         0x1000061 0x0001
 104                                         0x100006a 0x0000
 105                                         0x1000080 0x0000
 106                                         0x1000081 0x0000
 107                                         0x1000082 0x0000
 108                                         0x1000083 0x0000
 109                                         0x1000084 0x0000
 110                                         0x1000085 0x0000
 111                                         0x1000090 0x0010
 112                                         0x1000092 0x0000
 113                                         0x1000093 0x0003
 114                                         0x1000095 0x0110
 115                                         0x1000097 0x0000
 116                                         0x1000098 0x0000
 117                                         0x1000007 0x0133
 118                                         0x1000020 0x0000
 119                                         0x1000021 0x0000
 120                                         0x2000064>;
 121                                 debug = <0>;
 122                         };
 123
 124                         hy28b_ts: hy28b-ts@1 {
 125                                 compatible = "ti,ads7846";
 126                                 reg = <1>;
 127
 128                                 spi-max-frequency = <2000000>;
 129                                 interrupts = <17 2>; /* high-to-low edge triggered */
 130                                 interrupt-parent = <&gpio>;
 131                                 pendown-gpio = <&gpio 17 0>;
 132                                 ti,x-plate-ohms = /bits/ 16 <100>;
 133                                 ti,pressure-max = /bits/ 16 <255>;
 134                         };
 135                 };
 136         };
 137         __overrides__ {
 138                 speed =         <&hy28b>,"spi-max-frequency:0";
 139                 rotate =        <&hy28b>,"rotate:0";
 140                 fps =           <&hy28b>,"fps:0";
 141                 debug =         <&hy28b>,"debug:0";
 142                 xohms =         <&hy28b_ts>,"ti,x-plate-ohms;0";
 143                 resetgpio =     <&hy28b>,"reset-gpios:4",
 144                                 <&hy28b_pins>, "brcm,pins:4";
 145                 ledgpio =       <&hy28b>,"led-gpios:4",
 146                                 <&hy28b_pins>, "brcm,pins:8";
 147         };
 148 };