target/linux/brcm2708/patches-4.19/950-0364-BCM2708-Add-core-Device-Tree-support-ilitek251x.patch

   1 From c0dfc87e355a7c6e434122e1a4fcc69729970610 Mon Sep 17 00:00:00 2001
   2 From: Samuel Hsu <hsu@distec.de>
   3 Date: Mon, 8 Apr 2019 17:06:44 +0200
   4 Subject: [PATCH] BCM2708: Add core Device Tree support, ilitek251x
   5
   6 Signed-off-by: Samuel Hsu <hsu@distec.de>
   7 ---
   8  arch/arm/boot/dts/overlays/Makefile           |  1 +
   9  arch/arm/boot/dts/overlays/README             | 11 +++++
  10  .../boot/dts/overlays/ilitek251x-overlay.dts  | 45 +++++++++++++++++++
  11  3 files changed, 57 insertions(+)
  12  create mode 100644 arch/arm/boot/dts/overlays/ilitek251x-overlay.dts
  13
  14 --- a/arch/arm/boot/dts/overlays/Makefile
  15 +++ b/arch/arm/boot/dts/overlays/Makefile
  16 @@ -67,6 +67,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  17         i2c0-bcm2708.dtbo \
  18         i2c1-bcm2708.dtbo \
  19         i2s-gpio28-31.dtbo \
  20 +       ilitek251x.dtbo \
  21         iqaudio-dac.dtbo \
  22         iqaudio-dacplus.dtbo \
  23         iqaudio-digi-wm8804-audio.dtbo \
  24 --- a/arch/arm/boot/dts/overlays/README
  25 +++ b/arch/arm/boot/dts/overlays/README
  26 @@ -1146,6 +1146,17 @@ Load:   dtoverlay=i2s-gpio28-31
  27  Params: <None>
  28
  29
  30 +Name:   ilitek251x
  31 +Info:   Enables I2C connected Ilitek 251x multiple touch controller using
  32 +        GPIO 4 (pin 7 on GPIO header) for interrupt.
  33 +Load:   dtoverlay=ilitek251x,<param>=<val>
  34 +Params: interrupt               GPIO used for interrupt (default 4)
  35 +        sizex                   Touchscreen size x, horizontal resolution of
  36 +                                touchscreen (in pixels)
  37 +        sizey                   Touchscreen size y, vertical resolution of
  38 +                                touchscreen (in pixels)
  39 +
  40 +
  41  Name:   iqaudio-dac
  42  Info:   Configures the IQaudio DAC audio card
  43  Load:   dtoverlay=iqaudio-dac,<param>
  44 --- /dev/null
  45 +++ b/arch/arm/boot/dts/overlays/ilitek251x-overlay.dts
  46 @@ -0,0 +1,45 @@
  47 +// Device tree overlay for I2C connected Ilitek multiple touch controller
  48 +/dts-v1/;
  49 +/plugin/;
  50 +
  51 + / {
  52 +       compatible = "brcm,bcm2708";
  53 +
  54 +       fragment@0 {
  55 +               target = <&gpio>;
  56 +               __overlay__ {
  57 +                       ili251x_pins: ili251x_pins {
  58 +                               brcm,pins = <4>; // interrupt
  59 +                               brcm,function = <0>; // in
  60 +                               brcm,pull = <2>; // pull-up //
  61 +                       };
  62 +               };
  63 +       };
  64 +
  65 +       fragment@1 {
  66 +               target = <&i2c1>;
  67 +               __overlay__ {
  68 +                       #address-cells = <1>;
  69 +                       #size-cells = <0>;
  70 +                       status = "okay";
  71 +
  72 +                       ili251x: ili251x@41 {
  73 +                               compatible = "ilitek,ili251x";
  74 +                               reg = <0x41>;
  75 +                               pinctrl-names = "default";
  76 +                               pinctrl-0 = <&ili251x_pins>;
  77 +                               interrupt-parent = <&gpio>;
  78 +                               interrupts = <4 8>; // high-to-low edge triggered
  79 +                               touchscreen-size-x = <16384>;
  80 +                               touchscreen-size-y = <9600>;
  81 +                       };
  82 +               };
  83 +       };
  84 +
  85 +       __overrides__ {
  86 +               interrupt = <&ili251x_pins>,"brcm,pins:0",
  87 +                       <&ili251x>,"interrupts:0";
  88 +               sizex = <&ili251x>,"touchscreen-size-x:0";
  89 +               sizey = <&ili251x>,"touchscreen-size-y:0";
  90 +       };
  91 +};