git.openwrt.org Git - openwrt/staging/linusw.git/blob

   1 From e7972981794db2cfa349aa5d34171f83d4ffe830 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Fri, 6 Nov 2020 18:52:25 +0000
   4 Subject: [PATCH] dtoverlays: Add an overlay for the EDT FT5406
   5  touchscreen
   6
   7 This touchscreen controller is used by the 7" DSI panel, and
   8 this overlay configures it for when it is NOT being polled by
   9 the firmware.
  10
  11 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  12 ---
  13  arch/arm/boot/dts/overlays/Makefile           |  1 +
  14  arch/arm/boot/dts/overlays/README             | 14 +++++++
  15  .../boot/dts/overlays/edt-ft5406-overlay.dts  | 42 +++++++++++++++++++
  16  3 files changed, 57 insertions(+)
  17  create mode 100644 arch/arm/boot/dts/overlays/edt-ft5406-overlay.dts
  18
  19 --- a/arch/arm/boot/dts/overlays/Makefile
  20 +++ b/arch/arm/boot/dts/overlays/Makefile
  21 @@ -40,6 +40,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  22         draws.dtbo \
  23         dwc-otg.dtbo \
  24         dwc2.dtbo \
  25 +       edt-ft5406.dtbo \
  26         enc28j60.dtbo \
  27         enc28j60-spi2.dtbo \
  28         exc3000.dtbo \
  29 --- a/arch/arm/boot/dts/overlays/README
  30 +++ b/arch/arm/boot/dts/overlays/README
  31 @@ -733,6 +733,20 @@ Params: dr_mode                 Dual rol
  32  [ The ds1307-rtc overlay has been deleted. See i2c-rtc. ]
  33
  34
  35 +Name:   edt-ft5406
  36 +Info:   Overlay for the EDT FT5406 touchscreen on the CSI/DSI I2C interface.
  37 +        This works with the Raspberry Pi 7" touchscreen when not being polled
  38 +        by the firmware.
  39 +        You MUST use either "disable_touchscreen=1" or "ignore_lcd=1" in
  40 +        config.txt to stop the firmware polling the touchscreen.
  41 +Load:   dtoverlay=edt-ft5406,<param>=<val>
  42 +Params: sizex                   Touchscreen size x (default 800)
  43 +        sizey                   Touchscreen size y (default 480)
  44 +        invx                    Touchscreen inverted x axis
  45 +        invy                    Touchscreen inverted y axis
  46 +        swapxy                  Touchscreen swapped x y axis
  47 +
  48 +
  49  Name:   enc28j60
  50  Info:   Overlay for the Microchip ENC28J60 Ethernet Controller on SPI0
  51  Load:   dtoverlay=enc28j60,<param>=<val>
  52 --- /dev/null
  53 +++ b/arch/arm/boot/dts/overlays/edt-ft5406-overlay.dts
  54 @@ -0,0 +1,42 @@
  55 +/*
  56 + * Device Tree overlay for RaspberryPi 7" Touchscreen panel
  57 + *
  58 + */
  59 +
  60 +/dts-v1/;
  61 +/plugin/;
  62 +
  63 +/ {
  64 +       compatible = "brcm,bcm2835";
  65 +
  66 +       fragment@0 {
  67 +               target = <&i2c_csi_dsi>;
  68 +               __overlay__ {
  69 +                       #address-cells = <1>;
  70 +                       #size-cells = <0>;
  71 +                       status = "okay";
  72 +                       ft5406: ts@38 {
  73 +                               compatible = "edt,edt-ft5406";
  74 +                               reg = <0x38>;
  75 +
  76 +                               touchscreen-size-x = < 800 >;
  77 +                               touchscreen-size-y = < 480 >;
  78 +                       };
  79 +               };
  80 +       };
  81 +
  82 +       fragment@1 {
  83 +               target = <&i2c0if>;
  84 +               __overlay__ {
  85 +                       status = "okay";
  86 +               };
  87 +       };
  88 +
  89 +       __overrides__ {
  90 +               sizex = <&ft5406>,"touchscreen-size-x:0";
  91 +               sizey = <&ft5406>,"touchscreen-size-y:0";
  92 +               invx = <&ft5406>,"touchscreen-inverted-x?";
  93 +               invy = <&ft5406>,"touchscreen-inverted-y?";
  94 +               swapxy = <&ft5406>,"touchscreen-swapped-x-y?";
  95 +       };
  96 +};