target/linux/brcm2708/patches-4.14/950-0164-overlays-Add-EETI-EXC3000-overlay.patch

   1 From e141a75b9cc36a09eb8bda90b530d97a9bb1f21e Mon Sep 17 00:00:00 2001
   2 From: Ahmet Inan <inan@aicodix.de>
   3 Date: Fri, 1 Sep 2017 15:18:01 +0200
   4 Subject: [PATCH 164/454] overlays: Add EETI EXC3000 overlay
   5
   6 Add support for I2C connected EETI EXC3000 multiple touch controller
   7 using GPIO 4 (pin 7 on GPIO header) for interrupt.
   8
   9 Signed-off-by: Ahmet Inan <inan@aicodix.de>
  10 ---
  11  arch/arm/boot/dts/overlays/Makefile           |  1 +
  12  arch/arm/boot/dts/overlays/README             | 12 +++++
  13  .../arm/boot/dts/overlays/exc3000-overlay.dts | 48 +++++++++++++++++++
  14  3 files changed, 61 insertions(+)
  15  create mode 100644 arch/arm/boot/dts/overlays/exc3000-overlay.dts
  16
  17 --- a/arch/arm/boot/dts/overlays/Makefile
  18 +++ b/arch/arm/boot/dts/overlays/Makefile
  19 @@ -26,6 +26,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  20         dwc2.dtbo \
  21         enc28j60.dtbo \
  22         enc28j60-spi2.dtbo \
  23 +       exc3000.dtbo \
  24         fe-pi-audio.dtbo \
  25         goodix.dtbo \
  26         googlevoicehat-soundcard.dtbo \
  27 --- a/arch/arm/boot/dts/overlays/README
  28 +++ b/arch/arm/boot/dts/overlays/README
  29 @@ -468,6 +468,18 @@ Params: int_pin                 GPIO use
  30          speed                   SPI bus speed (default 12000000)
  31
  32
  33 +Name:   exc3000
  34 +Info:   Enables I2C connected EETI EXC3000 multiple touch controller using
  35 +        GPIO 4 (pin 7 on GPIO header) for interrupt.
  36 +Load:   dtoverlay=exc3000,<param>=<val>
  37 +Params: interrupt               GPIO used for interrupt (default 4)
  38 +        sizex                   Touchscreen size x (default 4096)
  39 +        sizey                   Touchscreen size y (default 4096)
  40 +        invx                    Touchscreen inverted x axis
  41 +        invy                    Touchscreen inverted y axis
  42 +        swapxy                  Touchscreen swapped x y axis
  43 +
  44 +
  45  Name:   fe-pi-audio
  46  Info:   Configures the Fe-Pi Audio Sound Card
  47  Load:   dtoverlay=fe-pi-audio
  48 --- /dev/null
  49 +++ b/arch/arm/boot/dts/overlays/exc3000-overlay.dts
  50 @@ -0,0 +1,48 @@
  51 +// Device tree overlay for I2C connected EETI EXC3000 multiple touch controller
  52 +/dts-v1/;
  53 +/plugin/;
  54 +
  55 +/ {
  56 +       compatible = "brcm,bcm2708";
  57 +
  58 +       fragment@0 {
  59 +               target = <&gpio>;
  60 +               __overlay__ {
  61 +                       exc3000_pins: exc3000_pins {
  62 +                               brcm,pins = <4>; // interrupt
  63 +                               brcm,function = <0>; // in
  64 +                               brcm,pull = <2>; // pull-up
  65 +                       };
  66 +               };
  67 +       };
  68 +
  69 +       fragment@1 {
  70 +               target = <&i2c1>;
  71 +               __overlay__ {
  72 +                       #address-cells = <1>;
  73 +                       #size-cells = <0>;
  74 +                       status = "okay";
  75 +
  76 +                       exc3000: exc3000@2a {
  77 +                               compatible = "eeti,exc3000";
  78 +                               reg = <0x2a>;
  79 +                               pinctrl-names = "default";
  80 +                               pinctrl-0 = <&exc3000_pins>;
  81 +                               interrupt-parent = <&gpio>;
  82 +                               interrupts = <4 8>; // active low level-sensitive
  83 +                               touchscreen-size-x = <4096>;
  84 +                               touchscreen-size-y = <4096>;
  85 +                       };
  86 +               };
  87 +       };
  88 +
  89 +       __overrides__ {
  90 +               interrupt = <&exc3000_pins>,"brcm,pins:0",
  91 +                       <&exc3000>,"interrupts:0";
  92 +               sizex = <&exc3000>,"touchscreen-size-x:0";
  93 +               sizey = <&exc3000>,"touchscreen-size-y:0";
  94 +               invx = <&exc3000>,"touchscreen-inverted-x?";
  95 +               invy = <&exc3000>,"touchscreen-inverted-y?";
  96 +               swapxy = <&exc3000>,"touchscreen-swapped-x-y?";
  97 +       };
  98 +};