target/linux/bcm27xx/patches-5.15/950-0648-overlays-Add-overlay-for-Azoteq-IQS550.patch

   1 From 7c9c2e970b0a047ae2a747752fdd12e31dbb2451 Mon Sep 17 00:00:00 2001
   2 From: Jeff LaBundy <jeff@labundy.com>
   3 Date: Mon, 28 Jan 2019 23:11:47 -0600
   4 Subject: [PATCH] overlays: Add overlay for Azoteq IQS550
   5
   6 This patch adds a device tree overlay for the Azoteq IQS550
   7 trackpad/touchscreen controller.
   8
   9 Signed-off-by: Jeff LaBundy <jeff@labundy.com>
  10 ---
  11  arch/arm/boot/dts/overlays/Makefile           |  1 +
  12  arch/arm/boot/dts/overlays/README             | 13 ++++++
  13  arch/arm/boot/dts/overlays/iqs550-overlay.dts | 46 +++++++++++++++++++
  14  3 files changed, 60 insertions(+)
  15  create mode 100644 arch/arm/boot/dts/overlays/iqs550-overlay.dts
  16
  17 --- a/arch/arm/boot/dts/overlays/Makefile
  18 +++ b/arch/arm/boot/dts/overlays/Makefile
  19 @@ -106,6 +106,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  20         iqaudio-dac.dtbo \
  21         iqaudio-dacplus.dtbo \
  22         iqaudio-digi-wm8804-audio.dtbo \
  23 +       iqs550.dtbo \
  24         irs1125.dtbo \
  25         jedec-spi-nor.dtbo \
  26         justboom-both.dtbo \
  27 --- a/arch/arm/boot/dts/overlays/README
  28 +++ b/arch/arm/boot/dts/overlays/README
  29 @@ -1991,6 +1991,19 @@ Params: card_name               Override
  30                                  dai stream name.
  31
  32
  33 +Name:   iqs550
  34 +Info:   Enables I2C connected Azoteq IQS550 trackpad/touchscreen controller
  35 +        using GPIO 4 (pin 7 on GPIO header) for interrupt.
  36 +Load:   dtoverlay=iqs550,<param>=<val>
  37 +Params: interrupt               GPIO used for interrupt (default 4)
  38 +        reset                   GPIO used for reset (optional)
  39 +        sizex                   Touchscreen size x (default 800)
  40 +        sizey                   Touchscreen size y (default 480)
  41 +        invx                    Touchscreen inverted x axis
  42 +        invy                    Touchscreen inverted y axis
  43 +        swapxy                  Touchscreen swapped x y axis
  44 +
  45 +
  46  Name:   irs1125
  47  Info:   Infineon irs1125 TOF camera module.
  48          Uses Unicam 1, which is the standard camera connector on most Pi
  49 --- /dev/null
  50 +++ b/arch/arm/boot/dts/overlays/iqs550-overlay.dts
  51 @@ -0,0 +1,46 @@
  52 +// SPDX-License-Identifier: GPL-2.0-or-later
  53 +// Definitions for Azoteq IQS550 trackpad/touchscreen controller
  54 +/dts-v1/;
  55 +/plugin/;
  56 +#include <dt-bindings/gpio/gpio.h>
  57 +#include <dt-bindings/interrupt-controller/irq.h>
  58 +
  59 +/ {
  60 +       compatible = "brcm,bcm2835";
  61 +
  62 +       fragment@0 {
  63 +               target = <&i2c1>;
  64 +               __overlay__ {
  65 +                       #address-cells = <1>;
  66 +                       #size-cells = <0>;
  67 +                       status = "okay";
  68 +
  69 +                       iqs550: iqs550@74 {
  70 +                               compatible = "azoteq,iqs550";
  71 +                               reg = <0x74>;
  72 +                               interrupt-parent = <&gpio>;
  73 +                               interrupts = <4 IRQ_TYPE_LEVEL_HIGH>;
  74 +                               touchscreen-size-x = <800>;
  75 +                               touchscreen-size-y = <480>;
  76 +                       };
  77 +               };
  78 +       };
  79 +
  80 +       fragment@1 {
  81 +               target = <&iqs550>;
  82 +               iqs550_reset: __dormant__ {
  83 +                       reset-gpios = <&gpio 255 (GPIO_ACTIVE_LOW |
  84 +                                                 GPIO_PUSH_PULL)>;
  85 +               };
  86 +       };
  87 +
  88 +       __overrides__ {
  89 +               interrupt = <&iqs550>,"interrupts:0";
  90 +               reset = <0>,"+1", <&iqs550_reset>,"reset-gpios:4";
  91 +               sizex = <&iqs550>,"touchscreen-size-x:0";
  92 +               sizey = <&iqs550>,"touchscreen-size-y:0";
  93 +               invx = <&iqs550>,"touchscreen-inverted-x?";
  94 +               invy = <&iqs550>,"touchscreen-inverted-y?";
  95 +               swapxy = <&iqs550>,"touchscreen-swapped-x-y?";
  96 +       };
  97 +};