arch/arm/boot/dts/overlays/hy28b-2017-overlay.dts

   1 /*
   2  * Device Tree overlay for HY28b display shield by Texy.
   3  * Modified for 2017 version with ILI9325 D chip
   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                                 init = <0x10000e5 0x78F0
  68                                         0x1000001 0x0100
  69                                         0x1000002 0x0700
  70                                         0x1000003 0x1030
  71                                         0x1000004 0x0000
  72                                         0x1000008 0x0207
  73                                         0x1000009 0x0000
  74                                         0x100000a 0x0000
  75                                         0x100000c 0x0000
  76                                         0x100000d 0x0000
  77                                         0x100000f 0x0000
  78                                         0x1000010 0x0000
  79                                         0x1000011 0x0007
  80                                         0x1000012 0x0000
  81                                         0x1000013 0x0000
  82                                         0x1000007 0x0001
  83                                         0x2000032
  84                                         0x2000032
  85                                         0x2000032
  86                                         0x2000032
  87                                         0x1000010 0x1090
  88                                         0x1000011 0x0227
  89                                         0x2000032
  90                                         0x1000012 0x001f
  91                                         0x2000032
  92                                         0x1000013 0x1500
  93                                         0x1000029 0x0027
  94                                         0x100002b 0x000d
  95                                         0x2000032
  96                                         0x1000020 0x0000
  97                                         0x1000021 0x0000
  98                                         0x2000032
  99                                         0x1000030 0x0000
 100                                         0x1000031 0x0707
 101                                         0x1000032 0x0307
 102                                         0x1000035 0x0200
 103                                         0x1000036 0x0008
 104                                         0x1000037 0x0004
 105                                         0x1000038 0x0000
 106                                         0x1000039 0x0707
 107                                         0x100003c 0x0002
 108                                         0x100003d 0x1d04
 109                                         0x1000050 0x0000
 110                                         0x1000051 0x00ef
 111                                         0x1000052 0x0000
 112                                         0x1000053 0x013f
 113                                         0x1000060 0xa700
 114                                         0x1000061 0x0001
 115                                         0x100006a 0x0000
 116                                         0x1000080 0x0000
 117                                         0x1000081 0x0000
 118                                         0x1000082 0x0000
 119                                         0x1000083 0x0000
 120                                         0x1000084 0x0000
 121                                         0x1000085 0x0000
 122                                         0x1000090 0x0010
 123                                         0x1000092 0x0600
 124                                         0x1000007 0x0133>;
 125                                 debug = <0>;
 126                         };
 127
 128                         hy28b_ts: hy28b-ts@1 {
 129                                 compatible = "ti,ads7846";
 130                                 reg = <1>;
 131
 132                                 spi-max-frequency = <2000000>;
 133                                 interrupts = <17 2>; /* high-to-low edge triggered */
 134                                 interrupt-parent = <&gpio>;
 135                                 pendown-gpio = <&gpio 17 0>;
 136                                 ti,x-plate-ohms = /bits/ 16 <100>;
 137                                 ti,pressure-max = /bits/ 16 <255>;
 138                         };
 139                 };
 140         };
 141         __overrides__ {
 142                 speed =         <&hy28b>,"spi-max-frequency:0";
 143                 rotate =        <&hy28b>,"rotate:0";
 144                 fps =           <&hy28b>,"fps:0";
 145                 debug =         <&hy28b>,"debug:0";
 146                 xohms =         <&hy28b_ts>,"ti,x-plate-ohms;0";
 147                 resetgpio =     <&hy28b>,"reset-gpios:4",
 148                                 <&hy28b_pins>, "brcm,pins:4";
 149                 ledgpio =       <&hy28b>,"led-gpios:4",
 150                                 <&hy28b_pins>, "brcm,pins:8";
 151         };
 152 };