target/linux/brcm2708/patches-4.4/0109-dts-Added-overlay-for-Adafruit-PiTFT-2.8-capacitive-.patch

   1 From 1a4fac1ea6bb33a963b06406f6f44b527daa3a90 Mon Sep 17 00:00:00 2001
   2 From: Ondrej Wisniewski <ondrej.wisniewski@gmail.com>
   3 Date: Fri, 6 Nov 2015 15:01:28 +0100
   4 Subject: [PATCH 109/170] dts: Added overlay for Adafruit PiTFT 2.8" capacitive
   5  touch screen
   6
   7 ---
   8  arch/arm/boot/dts/overlays/Makefile                |  1 +
   9  arch/arm/boot/dts/overlays/README                  | 22 ++++++
  10  .../dts/overlays/pitft28-capacitive-overlay.dts    | 88 ++++++++++++++++++++++
  11  3 files changed, 111 insertions(+)
  12  create mode 100644 arch/arm/boot/dts/overlays/pitft28-capacitive-overlay.dts
  13
  14 --- a/arch/arm/boot/dts/overlays/Makefile
  15 +++ b/arch/arm/boot/dts/overlays/Makefile
  16 @@ -36,6 +36,7 @@ dtb-$(RPI_DT_OVERLAYS) += mmc-overlay.dt
  17  dtb-$(RPI_DT_OVERLAYS) += mz61581-overlay.dtb
  18  dtb-$(RPI_DT_OVERLAYS) += piscreen-overlay.dtb
  19  dtb-$(RPI_DT_OVERLAYS) += piscreen2r-overlay.dtb
  20 +dtb-$(RPI_DT_OVERLAYS) += pitft28-capacitive-overlay.dtb
  21  dtb-$(RPI_DT_OVERLAYS) += pitft28-resistive-overlay.dtb
  22  dtb-$(RPI_DT_OVERLAYS) += pps-gpio-overlay.dtb
  23  dtb-$(RPI_DT_OVERLAYS) += pwm-overlay.dtb
  24 --- a/arch/arm/boot/dts/overlays/README
  25 +++ b/arch/arm/boot/dts/overlays/README
  26 @@ -439,6 +439,28 @@ Params: speed                    Display
  27          xohms                    Touchpanel sensitivity (X-plate resistance)
  28
  29
  30 +Name:   pitft28-capacitive
  31 +Info:   Adafruit PiTFT 2.8" capacitive touch screen
  32 +Load:   dtoverlay=pitft28-capacitive,<param>=<val>
  33 +Params: speed                    Display SPI bus speed
  34 +
  35 +        rotate                   Display rotation {0,90,180,270}
  36 +
  37 +        fps                      Delay between frame updates
  38 +
  39 +        debug                    Debug output level {0-7}
  40 +
  41 +        touch-sizex              Touchscreen size x (default 240)
  42 +
  43 +        touch-sizey              Touchscreen size y (default 320)
  44 +
  45 +        touch-invx               Touchscreen inverted x axis
  46 +
  47 +        touch-invy               Touchscreen inverted y axis
  48 +
  49 +        touch-swapxy             Touchscreen swapped x y axis
  50 +
  51 +
  52  Name:   pitft28-resistive
  53  Info:   Adafruit PiTFT 2.8" resistive touch screen
  54  Load:   dtoverlay=pitft28-resistive,<param>=<val>
  55 --- /dev/null
  56 +++ b/arch/arm/boot/dts/overlays/pitft28-capacitive-overlay.dts
  57 @@ -0,0 +1,88 @@
  58 +/*
  59 + * Device Tree overlay for Adafruit PiTFT 2.8" capacitive touch screen
  60 + *
  61 + */
  62 +
  63 +/dts-v1/;
  64 +/plugin/;
  65 +
  66 +/ {
  67 +        compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
  68 +
  69 +        fragment@0 {
  70 +                target = <&spi0>;
  71 +                __overlay__ {
  72 +                        status = "okay";
  73 +
  74 +                        spidev@0{
  75 +                                status = "disabled";
  76 +                        };
  77 +                };
  78 +        };
  79 +
  80 +        fragment@1 {
  81 +                target = <&gpio>;
  82 +                __overlay__ {
  83 +                        pitft_pins: pitft_pins {
  84 +                                brcm,pins = <24 25>;
  85 +                                brcm,function = <0 1>; /* in out */
  86 +                                brcm,pull = <2 0>; /* pullup none */
  87 +                        };
  88 +                };
  89 +        };
  90 +
  91 +        fragment@2 {
  92 +                target = <&spi0>;
  93 +                __overlay__ {
  94 +                        /* needed to avoid dtc warning */
  95 +                        #address-cells = <1>;
  96 +                        #size-cells = <0>;
  97 +
  98 +                        pitft: pitft@0{
  99 +                                compatible = "ilitek,ili9340";
 100 +                                reg = <0>;
 101 +                                pinctrl-names = "default";
 102 +                                pinctrl-0 = <&pitft_pins>;
 103 +
 104 +                                spi-max-frequency = <32000000>;
 105 +                                rotate = <90>;
 106 +                                fps = <25>;
 107 +                                bgr;
 108 +                                buswidth = <8>;
 109 +                                dc-gpios = <&gpio 25 0>;
 110 +                                debug = <0>;
 111 +                        };
 112 +                };
 113 +        };
 114 +
 115 +        fragment@3 {
 116 +                target = <&i2c1>;
 117 +                __overlay__ {
 118 +                        /* needed to avoid dtc warning */
 119 +                        #address-cells = <1>;
 120 +                        #size-cells = <0>;
 121 +
 122 +                        ft6236: ft6236@38 {
 123 +                                compatible = "focaltech,ft6236";
 124 +                                reg = <0x38>;
 125 +
 126 +                                interrupt-parent = <&gpio>;
 127 +                                interrupts = <24 2>;
 128 +                                touchscreen-size-x = <240>;
 129 +                                touchscreen-size-y = <320>;
 130 +                        };
 131 +                };
 132 +        };
 133 +
 134 +        __overrides__ {
 135 +                speed =   <&pitft>,"spi-max-frequency:0";
 136 +                rotate =  <&pitft>,"rotate:0";
 137 +                fps =     <&pitft>,"fps:0";
 138 +                debug =   <&pitft>,"debug:0";
 139 +                touch-sizex = <&ft6236>,"touchscreen-size-x?";
 140 +                touch-sizey = <&ft6236>,"touchscreen-size-y?";
 141 +                touch-invx  = <&ft6236>,"touchscreen-inverted-x?";
 142 +                touch-invy  = <&ft6236>,"touchscreen-inverted-y?";
 143 +                touch-swapxy = <&ft6236>,"touchscreen-swapped-x-y?";
 144 +        };
 145 +};