target/linux/brcm2708/patches-4.4/0511-Add-Adafruit-pitft35-touchscreen-support-1657.patch

   1 From 877d2ad66da4c7aba2db0ecb394a07a19ac2e374 Mon Sep 17 00:00:00 2001
   2 From: Scott Ellis <scott@jumpnowtek.com>
   3 Date: Tue, 27 Sep 2016 04:29:00 -0400
   4 Subject: [PATCH] Add Adafruit pitft35 touchscreen support (#1657)
   5
   6 The dts comes from the Adafruit repository
   7
   8   https://github.com/adafruit/Adafruit-Pi-Kernel-o-Matic/blob/pitft/pitft35r-overlay.dts
   9
  10 Reformatted slightly to match conventions in the pitft28-resistive-overlay.
  11
  12 Signed-off-by: Scott Ellis <scott@jumpnowtek.com>
  13 ---
  14  arch/arm/boot/dts/overlays/Makefile                |   1 +
  15  arch/arm/boot/dts/overlays/README                  |  12 ++
  16  .../dts/overlays/pitft35-resistive-overlay.dts     | 121 +++++++++++++++++++++
  17  arch/arm/configs/bcm2709_defconfig                 |   1 +
  18  arch/arm/configs/bcmrpi_defconfig                  |   1 +
  19  5 files changed, 136 insertions(+)
  20  create mode 100644 arch/arm/boot/dts/overlays/pitft35-resistive-overlay.dts
  21
  22 --- a/arch/arm/boot/dts/overlays/Makefile
  23 +++ b/arch/arm/boot/dts/overlays/Makefile
  24 @@ -65,6 +65,7 @@ dtbo-$(RPI_DT_OVERLAYS) += piscreen2r.dt
  25  dtbo-$(RPI_DT_OVERLAYS) += pitft22.dtbo
  26  dtbo-$(RPI_DT_OVERLAYS) += pitft28-capacitive.dtbo
  27  dtbo-$(RPI_DT_OVERLAYS) += pitft28-resistive.dtbo
  28 +dtbo-$(RPI_DT_OVERLAYS) += pitft35-resistive.dtbo
  29  dtbo-$(RPI_DT_OVERLAYS) += pps-gpio.dtbo
  30  dtbo-$(RPI_DT_OVERLAYS) += pwm.dtbo
  31  dtbo-$(RPI_DT_OVERLAYS) += pwm-2chan.dtbo
  32 --- a/arch/arm/boot/dts/overlays/README
  33 +++ b/arch/arm/boot/dts/overlays/README
  34 @@ -854,6 +854,18 @@ Params: speed                   Display
  35          debug                   Debug output level {0-7}
  36
  37
  38 +Name:   pitft35-resistive
  39 +Info:   Adafruit PiTFT 3.5" resistive touch screen
  40 +Load:   dtoverlay=pitft35-resistive,<param>=<val>
  41 +Params: speed                   Display SPI bus speed
  42 +
  43 +        rotate                  Display rotation {0,90,180,270}
  44 +
  45 +        fps                     Delay between frame updates
  46 +
  47 +        debug                   Debug output level {0-7}
  48 +
  49 +
  50  Name:   pps-gpio
  51  Info:   Configures the pps-gpio (pulse-per-second time signal via GPIO).
  52  Load:   dtoverlay=pps-gpio,<param>=<val>
  53 --- /dev/null
  54 +++ b/arch/arm/boot/dts/overlays/pitft35-resistive-overlay.dts
  55 @@ -0,0 +1,121 @@
  56 +/*
  57 + * Device Tree overlay for Adafruit PiTFT 3.5" resistive touch screen
  58 + *
  59 + */
  60 +
  61 +/dts-v1/;
  62 +/plugin/;
  63 +
  64 +/ {
  65 +       compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
  66 +
  67 +       fragment@0 {
  68 +               target = <&spi0>;
  69 +               __overlay__ {
  70 +                       status = "okay";
  71 +               };
  72 +       };
  73 +
  74 +       fragment@1 {
  75 +               target = <&spidev0>;
  76 +               __overlay__ {
  77 +                       status = "disabled";
  78 +               };
  79 +       };
  80 +
  81 +       fragment@2 {
  82 +               target = <&spidev1>;
  83 +               __overlay__ {
  84 +                       status = "disabled";
  85 +               };
  86 +       };
  87 +
  88 +       fragment@3 {
  89 +               target = <&gpio>;
  90 +               __overlay__ {
  91 +                       pitft_pins: pitft_pins {
  92 +                               brcm,pins = <24 25>;
  93 +                               brcm,function = <0 1>; /* in out */
  94 +                               brcm,pull = <2 0>; /* pullup none */
  95 +                       };
  96 +               };
  97 +       };
  98 +
  99 +       fragment@4 {
 100 +               target = <&spi0>;
 101 +               __overlay__ {
 102 +                       /* needed to avoid dtc warning */
 103 +                       #address-cells = <1>;
 104 +                       #size-cells = <0>;
 105 +
 106 +                       pitft: pitft@0{
 107 +                               compatible = "himax,hx8357d";
 108 +                               reg = <0>;
 109 +                               pinctrl-names = "default";
 110 +                               pinctrl-0 = <&pitft_pins>;
 111 +
 112 +                               spi-max-frequency = <32000000>;
 113 +                               rotate = <90>;
 114 +                               fps = <25>;
 115 +                               bgr;
 116 +                               buswidth = <8>;
 117 +                               dc-gpios = <&gpio 25 0>;
 118 +                               debug = <0>;
 119 +                       };
 120 +
 121 +                       pitft_ts@1 {
 122 +                               #address-cells = <1>;
 123 +                               #size-cells = <0>;
 124 +                               compatible = "st,stmpe610";
 125 +                               reg = <1>;
 126 +
 127 +                               spi-max-frequency = <500000>;
 128 +                               irq-gpio = <&gpio 24 0x2>; /* IRQF_TRIGGER_FALLING */
 129 +                               interrupts = <24 2>; /* high-to-low edge triggered */
 130 +                               interrupt-parent = <&gpio>;
 131 +                               interrupt-controller;
 132 +
 133 +                               stmpe_touchscreen {
 134 +                                       compatible = "st,stmpe-ts";
 135 +                                       st,sample-time = <4>;
 136 +                                       st,mod-12b = <1>;
 137 +                                       st,ref-sel = <0>;
 138 +                                       st,adc-freq = <2>;
 139 +                                       st,ave-ctrl = <3>;
 140 +                                       st,touch-det-delay = <4>;
 141 +                                       st,settling = <2>;
 142 +                                       st,fraction-z = <7>;
 143 +                                       st,i-drive = <0>;
 144 +                               };
 145 +
 146 +                               stmpe_gpio: stmpe_gpio {
 147 +                                       #gpio-cells = <2>;
 148 +                                       compatible = "st,stmpe-gpio";
 149 +                                       /*
 150 +                                        * only GPIO2 is wired/available
 151 +                                        * and it is wired to the backlight
 152 +                                        */
 153 +                                       st,norequest-mask = <0x7b>;
 154 +                               };
 155 +                       };
 156 +               };
 157 +       };
 158 +
 159 +       fragment@5 {
 160 +               target-path = "/soc";
 161 +               __overlay__ {
 162 +                       backlight {
 163 +                               compatible = "gpio-backlight";
 164 +                               gpios = <&stmpe_gpio 2 0>;
 165 +                               default-on;
 166 +                       };
 167 +               };
 168 +       };
 169 +
 170 +       __overrides__ {
 171 +               speed =   <&pitft>,"spi-max-frequency:0";
 172 +               rotate =  <&pitft>,"rotate:0";
 173 +               fps =     <&pitft>,"fps:0";
 174 +               debug =   <&pitft>,"debug:0";
 175 +       };
 176 +};
 177 --- a/arch/arm/configs/bcm2709_defconfig
 178 +++ b/arch/arm/configs/bcm2709_defconfig
 179 @@ -1116,6 +1116,7 @@ CONFIG_FB_TFT_BD663474=m
 180  CONFIG_FB_TFT_HX8340BN=m
 181  CONFIG_FB_TFT_HX8347D=m
 182  CONFIG_FB_TFT_HX8353D=m
 183 +CONFIG_FB_TFT_HX8357D=m
 184  CONFIG_FB_TFT_ILI9163=m
 185  CONFIG_FB_TFT_ILI9320=m
 186  CONFIG_FB_TFT_ILI9325=m
 187 --- a/arch/arm/configs/bcmrpi_defconfig
 188 +++ b/arch/arm/configs/bcmrpi_defconfig
 189 @@ -1123,6 +1123,7 @@ CONFIG_FB_TFT_BD663474=m
 190  CONFIG_FB_TFT_HX8340BN=m
 191  CONFIG_FB_TFT_HX8347D=m
 192  CONFIG_FB_TFT_HX8353D=m
 193 +CONFIG_FB_TFT_HX8357D=m
 194  CONFIG_FB_TFT_ILI9163=m
 195  CONFIG_FB_TFT_ILI9320=m
 196  CONFIG_FB_TFT_ILI9325=m