target/linux/brcm2708/patches-4.4/0238-BCM270X_DT-Add-dpi24-overlay.patch

   1 From d2d72085169d260835028620d0ca430c34b73bac Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Tue, 5 Apr 2016 13:01:54 +0100
   4 Subject: [PATCH] BCM270X_DT: Add dpi24 overlay
   5
   6 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
   7 ---
   8  arch/arm/boot/dts/overlays/Makefile          |  1 +
   9  arch/arm/boot/dts/overlays/README            |  8 +++++++
  10  arch/arm/boot/dts/overlays/dpi24-overlay.dts | 31 ++++++++++++++++++++++++++++
  11  3 files changed, 40 insertions(+)
  12  create mode 100644 arch/arm/boot/dts/overlays/dpi24-overlay.dts
  13
  14 --- a/arch/arm/boot/dts/overlays/Makefile
  15 +++ b/arch/arm/boot/dts/overlays/Makefile
  16 @@ -15,6 +15,7 @@ endif
  17  dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
  18  dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
  19  dtbo-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor.dtbo
  20 +dtbo-$(RPI_DT_OVERLAYS) += dpi24.dtbo
  21  dtbo-$(RPI_DT_OVERLAYS) += dwc2.dtbo
  22  dtbo-$(RPI_DT_OVERLAYS) += dwc-otg.dtbo
  23  dtbo-$(RPI_DT_OVERLAYS) += dht11.dtbo
  24 --- a/arch/arm/boot/dts/overlays/README
  25 +++ b/arch/arm/boot/dts/overlays/README
  26 @@ -213,6 +213,14 @@ Params: gpiopin                 GPIO con
  27                                  (default 4)
  28
  29
  30 +Name:   dpi24
  31 +Info:   Overlay for a generic 24-bit DPI display
  32 +        This uses GPIOs 0-27 (so no I2C, uart etc.), and activates the output
  33 +        2-3 seconds after the kernel has started.
  34 +Load:   dtoverlay=dpi24
  35 +Params: <None>
  36 +
  37 +
  38  Name:   dwc-otg
  39  Info:   Selects the dwc_otg USB controller driver which has fiq support. This
  40          is the default on all except the Pi Zero which defaults to dwc2.
  41 --- /dev/null
  42 +++ b/arch/arm/boot/dts/overlays/dpi24-overlay.dts
  43 @@ -0,0 +1,31 @@
  44 +/dts-v1/;
  45 +/plugin/;
  46 +
  47 +/{
  48 +       compatible = "brcm,bcm2708";
  49 +
  50 +       // There is no DPI driver module, but we need a platform device
  51 +       // node (that doesn't already use pinctrl) to hang the pinctrl
  52 +       // reference on - leds will do
  53 +
  54 +       fragment@0 {
  55 +               target = <&leds>;
  56 +               __overlay__ {
  57 +                       pinctrl-names = "default";
  58 +                       pinctrl-0 = <&dpi24_pins>;
  59 +               };
  60 +       };
  61 +
  62 +       fragment@1 {
  63 +               target = <&gpio>;
  64 +               __overlay__ {
  65 +                       dpi24_pins: dpi24_pins {
  66 +                               brcm,pins = <0 1 2 3 4 5 6 7 8 9 10 11
  67 +                                            12 13 14 15 16 17 18 19 20
  68 +                                            21 22 23 24 25 26 27>;
  69 +                               brcm,function = <6>; /* alt2 */
  70 +                               brcm,pull = <0>; /* no pull */
  71 +                       };
  72 +               };
  73 +       };
  74 +};