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

   1 From 3fa2fbb7f6e60b85086e454403c5eab1af63b1aa Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Wed, 14 Jun 2023 13:43:58 +0100
   4 Subject: [PATCH] dtoverlays: Add i2c bus overrides to edt-ft5406 overlay
   5
   6 Adds the option for the touch controller to be connected to any
   7 of the I2C ports.
   8
   9 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  10 ---
  11  arch/arm/boot/dts/overlays/README             | 17 +++++++++++++++-
  12  .../boot/dts/overlays/edt-ft5406-overlay.dts  | 20 +++++++++++++++++++
  13  arch/arm/boot/dts/overlays/edt-ft5406.dtsi    |  9 ++++++++-
  14  3 files changed, 44 insertions(+), 2 deletions(-)
  15
  16 --- a/arch/arm/boot/dts/overlays/README
  17 +++ b/arch/arm/boot/dts/overlays/README
  18 @@ -1040,9 +1040,11 @@ Params: dr_mode                 Dual rol
  19
  20
  21  Name:   edt-ft5406
  22 -Info:   Overlay for the EDT FT5406 touchscreen on the CSI/DSI I2C interface.
  23 +Info:   Overlay for the EDT FT5406 touchscreen.
  24          This works with the Raspberry Pi 7" touchscreen when not being polled
  25          by the firmware.
  26 +        By default the overlay uses the i2c_csi_dsi I2C interface, but this
  27 +        can be overridden
  28          You MUST use either "disable_touchscreen=1" or "ignore_lcd=1" in
  29          config.txt to stop the firmware polling the touchscreen.
  30  Load:   dtoverlay=edt-ft5406,<param>=<val>
  31 @@ -1051,6 +1053,19 @@ Params: sizex                   Touchscr
  32          invx                    Touchscreen inverted x axis
  33          invy                    Touchscreen inverted y axis
  34          swapxy                  Touchscreen swapped x y axis
  35 +        i2c0                    Choose the I2C0 bus on GPIOs 0&1
  36 +        i2c1                    Choose the I2C1 bus on GPIOs 2&3
  37 +        i2c3                    Choose the I2C3 bus (configure with the i2c3
  38 +                                overlay - BCM2711 only)
  39 +        i2c4                    Choose the I2C4 bus (configure with the i2c4
  40 +                                overlay - BCM2711 only)
  41 +        i2c5                    Choose the I2C5 bus (configure with the i2c5
  42 +                                overlay - BCM2711 only)
  43 +        i2c6                    Choose the I2C6 bus (configure with the i2c6
  44 +                                overlay - BCM2711 only)
  45 +        addr                    Sets the address for the touch controller. Note
  46 +                                that the device must be configured to use the
  47 +                                specified address.
  48
  49
  50  Name:   enc28j60
  51 --- a/arch/arm/boot/dts/overlays/edt-ft5406-overlay.dts
  52 +++ b/arch/arm/boot/dts/overlays/edt-ft5406-overlay.dts
  53 @@ -23,4 +23,24 @@
  54                         status = "okay";
  55                 };
  56         };
  57 +
  58 +       __overrides__ {
  59 +               i2c0 = <&frag13>,"target:0=",<&i2c0>;
  60 +               i2c1 = <&frag13>, "target?=0",
  61 +                      <&frag13>, "target-path=i2c1",
  62 +                      <0>,"-0-1";
  63 +               i2c3 = <&frag13>, "target?=0",
  64 +                      <&frag13>, "target-path=i2c3",
  65 +                      <0>,"-0-1";
  66 +               i2c4 = <&frag13>, "target?=0",
  67 +                      <&frag13>, "target-path=i2c4",
  68 +                      <0>,"-0-1";
  69 +               i2c5 = <&frag13>, "target?=0",
  70 +                      <&frag13>, "target-path=i2c5",
  71 +                      <0>,"-0-1";
  72 +               i2c6 = <&frag13>, "target?=0",
  73 +                      <&frag13>, "target-path=i2c6",
  74 +                      <0>,"-0-1";
  75 +               addr = <&ft5406>,"reg:0";
  76 +       };
  77  };
  78 --- a/arch/arm/boot/dts/overlays/edt-ft5406.dtsi
  79 +++ b/arch/arm/boot/dts/overlays/edt-ft5406.dtsi
  80 @@ -23,7 +23,7 @@
  81         };
  82
  83         fragment@12 {
  84 -               target = <&i2c_csi_dsi>;
  85 +               target = <&i2cbus>;
  86                 __overlay__ {
  87                         #address-cells = <1>;
  88                         #size-cells = <0>;
  89 @@ -37,6 +37,13 @@
  90                 };
  91         };
  92
  93 +       frag13: fragment@13 {
  94 +               target = <&i2c_csi_dsi>;
  95 +               i2cbus: __overlay__ {
  96 +                       status = "okay";
  97 +               };
  98 +       };
  99 +
 100         __overrides__ {
 101                 sizex = <&ft5406>,"touchscreen-size-x:0";
 102                 sizey = <&ft5406>,"touchscreen-size-y:0";