target/linux/brcm2708/patches-4.14/950-0431-Add-hy28b-2017-model-device-tree-overlay-2721.patch

   1 From a3d3b80d8a028e7cec393c02c1a96c5e632e7b30 Mon Sep 17 00:00:00 2001
   2 From: Hans-Wilhelm Warlo <5417271+hanswilw@users.noreply.github.com>
   3 Date: Tue, 16 Oct 2018 18:20:48 +0200
   4 Subject: [PATCH 431/454] Add hy28b 2017 model device tree overlay (#2721)
   5
   6 The 2017 version of the hy28b display requires a different
   7 initialisation sequence.
   8
   9 Signed-off-by: Hans-Wilhelm Warlo <hw@warlo.no>
  10 ---
  11  arch/arm/boot/dts/overlays/Makefile           |   1 +
  12  arch/arm/boot/dts/overlays/README             |  19 +++
  13  .../boot/dts/overlays/hy28b-2017-overlay.dts  | 152 ++++++++++++++++++
  14  3 files changed, 172 insertions(+)
  15  create mode 100644 arch/arm/boot/dts/overlays/hy28b-2017-overlay.dts
  16
  17 --- a/arch/arm/boot/dts/overlays/Makefile
  18 +++ b/arch/arm/boot/dts/overlays/Makefile
  19 @@ -51,6 +51,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  20         hifiberry-digi-pro.dtbo \
  21         hy28a.dtbo \
  22         hy28b.dtbo \
  23 +       hy28b-2017.dtbo \
  24         i2c-bcm2708.dtbo \
  25         i2c-gpio.dtbo \
  26         i2c-mux.dtbo \
  27 --- a/arch/arm/boot/dts/overlays/README
  28 +++ b/arch/arm/boot/dts/overlays/README
  29 @@ -792,6 +792,25 @@ Params: speed                   Display
  30          ledgpio                 GPIO used to control backlight
  31
  32
  33 +Name:   hy28b-2017
  34 +Info:   HY28B 2017 version - 2.8" TFT LCD Display Module by HAOYU Electronics
  35 +        Default values match Texy's display shield
  36 +Load:   dtoverlay=hy28b-2017,<param>=<val>
  37 +Params: speed                   Display SPI bus speed
  38 +
  39 +        rotate                  Display rotation {0,90,180,270}
  40 +
  41 +        fps                     Delay between frame updates
  42 +
  43 +        debug                   Debug output level {0-7}
  44 +
  45 +        xohms                   Touchpanel sensitivity (X-plate resistance)
  46 +
  47 +        resetgpio               GPIO used to reset controller
  48 +
  49 +        ledgpio                 GPIO used to control backlight
  50 +
  51 +
  52  Name:   i2c-bcm2708
  53  Info:   Fall back to the i2c_bcm2708 driver for the i2c_arm bus.
  54  Load:   dtoverlay=i2c-bcm2708
  55 --- /dev/null
  56 +++ b/arch/arm/boot/dts/overlays/hy28b-2017-overlay.dts
  57 @@ -0,0 +1,152 @@
  58 +/*
  59 + * Device Tree overlay for HY28b display shield by Texy.
  60 + * Modified for 2017 version with ILI9325 D chip
  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 +       };
  75 +
  76 +       fragment@1 {
  77 +               target = <&spidev0>;
  78 +               __overlay__ {
  79 +                       status = "disabled";
  80 +               };
  81 +       };
  82 +
  83 +       fragment@2 {
  84 +               target = <&spidev1>;
  85 +               __overlay__ {
  86 +                       status = "disabled";
  87 +               };
  88 +       };
  89 +
  90 +       fragment@3 {
  91 +               target = <&gpio>;
  92 +               __overlay__ {
  93 +                       hy28b_pins: hy28b_pins {
  94 +                               brcm,pins = <17 25 18>;
  95 +                               brcm,function = <0 1 1>; /* in out out */
  96 +                       };
  97 +               };
  98 +       };
  99 +
 100 +       fragment@4 {
 101 +               target = <&spi0>;
 102 +               __overlay__ {
 103 +                       /* needed to avoid dtc warning */
 104 +                       #address-cells = <1>;
 105 +                       #size-cells = <0>;
 106 +
 107 +                       hy28b: hy28b@0{
 108 +                               compatible = "ilitek,ili9325";
 109 +                               reg = <0>;
 110 +                               pinctrl-names = "default";
 111 +                               pinctrl-0 = <&hy28b_pins>;
 112 +
 113 +                               spi-max-frequency = <48000000>;
 114 +                               spi-cpol;
 115 +                               spi-cpha;
 116 +                               rotate = <270>;
 117 +                               bgr;
 118 +                               fps = <50>;
 119 +                               buswidth = <8>;
 120 +                               startbyte = <0x70>;
 121 +                               reset-gpios = <&gpio 25 0>;
 122 +                               led-gpios = <&gpio 18 1>;
 123 +
 124 +                               init = <0x10000e5 0x78F0
 125 +                                       0x1000001 0x0100
 126 +                                       0x1000002 0x0700
 127 +                                       0x1000003 0x1030
 128 +                                       0x1000004 0x0000
 129 +                                       0x1000008 0x0207
 130 +                                       0x1000009 0x0000
 131 +                                       0x100000a 0x0000
 132 +                                       0x100000c 0x0000
 133 +                                       0x100000d 0x0000
 134 +                                       0x100000f 0x0000
 135 +                                       0x1000010 0x0000
 136 +                                       0x1000011 0x0007
 137 +                                       0x1000012 0x0000
 138 +                                       0x1000013 0x0000
 139 +                                       0x1000007 0x0001
 140 +                                       0x2000032
 141 +                                       0x2000032
 142 +                                       0x2000032
 143 +                                       0x2000032
 144 +                                       0x1000010 0x1090
 145 +                                       0x1000011 0x0227
 146 +                                       0x2000032
 147 +                                       0x1000012 0x001f
 148 +                                       0x2000032
 149 +                                       0x1000013 0x1500
 150 +                                       0x1000029 0x0027
 151 +                                       0x100002b 0x000d
 152 +                                       0x2000032
 153 +                                       0x1000020 0x0000
 154 +                                       0x1000021 0x0000
 155 +                                       0x2000032
 156 +                                       0x1000030 0x0000
 157 +                                       0x1000031 0x0707
 158 +                                       0x1000032 0x0307
 159 +                                       0x1000035 0x0200
 160 +                                       0x1000036 0x0008
 161 +                                       0x1000037 0x0004
 162 +                                       0x1000038 0x0000
 163 +                                       0x1000039 0x0707
 164 +                                       0x100003c 0x0002
 165 +                                       0x100003d 0x1d04
 166 +                                       0x1000050 0x0000
 167 +                                       0x1000051 0x00ef
 168 +                                       0x1000052 0x0000
 169 +                                       0x1000053 0x013f
 170 +                                       0x1000060 0xa700
 171 +                                       0x1000061 0x0001
 172 +                                       0x100006a 0x0000
 173 +                                       0x1000080 0x0000
 174 +                                       0x1000081 0x0000
 175 +                                       0x1000082 0x0000
 176 +                                       0x1000083 0x0000
 177 +                                       0x1000084 0x0000
 178 +                                       0x1000085 0x0000
 179 +                                       0x1000090 0x0010
 180 +                                       0x1000092 0x0600
 181 +                                       0x1000007 0x0133>;
 182 +                               debug = <0>;
 183 +                       };
 184 +
 185 +                       hy28b_ts: hy28b-ts@1 {
 186 +                               compatible = "ti,ads7846";
 187 +                               reg = <1>;
 188 +
 189 +                               spi-max-frequency = <2000000>;
 190 +                               interrupts = <17 2>; /* high-to-low edge triggered */
 191 +                               interrupt-parent = <&gpio>;
 192 +                               pendown-gpio = <&gpio 17 0>;
 193 +                               ti,x-plate-ohms = /bits/ 16 <100>;
 194 +                               ti,pressure-max = /bits/ 16 <255>;
 195 +                       };
 196 +               };
 197 +       };
 198 +       __overrides__ {
 199 +               speed =         <&hy28b>,"spi-max-frequency:0";
 200 +               rotate =        <&hy28b>,"rotate:0";
 201 +               fps =           <&hy28b>,"fps:0";
 202 +               debug =         <&hy28b>,"debug:0";
 203 +               xohms =         <&hy28b_ts>,"ti,x-plate-ohms;0";
 204 +               resetgpio =     <&hy28b>,"reset-gpios:4",
 205 +                               <&hy28b_pins>, "brcm,pins:4";
 206 +               ledgpio =       <&hy28b>,"led-gpios:4",
 207 +                               <&hy28b_pins>, "brcm,pins:8";
 208 +       };
 209 +};