arch/arm/boot/dts/overlays/adafruit-st7735r-overlay.dts

   1 /*
   2  * adafruit-st7735r-overlay.dts
   3  *
   4  * ST7735R based SPI LCD displays. Either
   5  * Adafruit 1.8" 160x128
   6  *   or
   7  * Okaya 1.44" 128x128
   8  */
   9
  10 /dts-v1/;
  11 /plugin/;
  12
  13 #include <dt-bindings/gpio/gpio.h>
  14
  15 / {
  16         compatible = "brcm,bcm2835";
  17
  18         fragment@0 {
  19                 target = <&spidev0>;
  20                 __overlay__ {
  21                         status = "disabled";
  22                 };
  23         };
  24
  25         fragment@1 {
  26                 target = <&gpio>;
  27                 __overlay__ {
  28                         adafruit_pins: adafruit_pins {
  29                                 brcm,pins = <25 24>;
  30                                 brcm,function = <1>; /* out */
  31                         };
  32                         backlight_pins: backlight_pins {
  33                                 brcm,pins = <18>;
  34                                 brcm,function = <1>; /* out */
  35                         };
  36                 };
  37         };
  38
  39         fragment@2 {
  40                 target-path = "/";
  41                 __overlay__ {
  42                         af18_backlight: backlight {
  43                                 compatible = "gpio-backlight";
  44                                 gpios = <&gpio 18 GPIO_ACTIVE_HIGH>;
  45                                 pinctrl-names = "default";
  46                                 pinctrl-0 = <&backlight_pins>;
  47                         };
  48                 };
  49         };
  50
  51         fragment@3 {
  52                 target = <&spi0>;
  53                 __overlay__ {
  54                         /* needed to avoid dtc warning */
  55                         #address-cells = <1>;
  56                         #size-cells = <0>;
  57                         status = "okay";
  58
  59                         af18: adafruit18@0 {
  60                                 compatible = "jianda,jd-t18003-t01";
  61                                 reg = <0>;
  62                                 spi-max-frequency = <32000000>;
  63                                 dc-gpios = <&gpio 24 GPIO_ACTIVE_HIGH>;
  64                                 reset-gpios = <&gpio 25 GPIO_ACTIVE_HIGH>;
  65                                 rotation = <90>;
  66                                 pinctrl-names = "default";
  67                                 pinctrl-0 = <&adafruit_pins>;
  68                                 backlight = <&af18_backlight>;
  69                         };
  70                 };
  71         };
  72
  73         __overrides__ {
  74                 128x128 = <&af18>, "compatible=okaya,rh128128t";
  75                 speed = <&af18>,"spi-max-frequency:0";
  76                 rotate = <&af18>,"rotation:0";
  77                 dc_pin = <&af18>,"dc-gpios:4", <&adafruit_pins>,"brcm,pins:4";
  78                 reset_pin = <&af18>,"reset-gpios:4",
  79                             <&adafruit_pins>,"brcm,pins:0";
  80                 led_pin = <&af18_backlight>,"gpios:4",
  81                           <&backlight_pins>,"brcm,pins:0";
  82         };
  83 };