target/linux/brcm2708/patches-4.14/950-0226-overlays-Add-overlay-for-missing-AUX-interrupt-contr.patch

   1 From 8134311059a478a79f7c9c9d08163bafa972fd39 Mon Sep 17 00:00:00 2001
   2 From: Alexander Graf <agraf@suse.de>
   3 Date: Tue, 20 Feb 2018 17:36:21 +0100
   4 Subject: [PATCH 226/454] overlays: Add overlay for missing AUX interrupt
   5  controller support (#2391)
   6
   7 Upstream Linux today does not support the AUX interrupt controller
   8 yet. To make sure it can use our device tree, add an overlay that
   9 reverts it to something upstream understands again.
  10
  11 See: https://github.com/raspberrypi/firmware/issues/943
  12
  13 Signed-off-by: Alexander Graf <agraf@suse.de>
  14 ---
  15  arch/arm/boot/dts/overlays/Makefile           |  1 +
  16  arch/arm/boot/dts/overlays/README             |  7 ++++
  17  .../upstream-aux-interrupt-overlay.dts        | 33 +++++++++++++++++++
  18  3 files changed, 41 insertions(+)
  19  create mode 100644 arch/arm/boot/dts/overlays/upstream-aux-interrupt-overlay.dts
  20
  21 --- a/arch/arm/boot/dts/overlays/Makefile
  22 +++ b/arch/arm/boot/dts/overlays/Makefile
  23 @@ -122,6 +122,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  24         tinylcd35.dtbo \
  25         uart0.dtbo \
  26         uart1.dtbo \
  27 +       upstream-aux-interrupt.dtbo \
  28         vc4-fkms-v3d.dtbo \
  29         vc4-kms-v3d.dtbo \
  30         vga666.dtbo \
  31 --- a/arch/arm/boot/dts/overlays/README
  32 +++ b/arch/arm/boot/dts/overlays/README
  33 @@ -1721,6 +1721,13 @@ Params: txd1_pin                GPIO pin
  34          rxd1_pin                GPIO pin for RXD1 (15, 33 or 41 - default 15)
  35
  36
  37 +Name:   upstream-aux-interrupt
  38 +Info:   Allow usage of downstream .dtb with upstream kernel by binding AUX
  39 +        devices directly to the shared AUX interrupt line.
  40 +Load:   dtoverlay=upstream-aux-interrupt
  41 +Params: <None>
  42 +
  43 +
  44  Name:   vc4-fkms-v3d
  45  Info:   Enable Eric Anholt's DRM VC4 V3D driver on top of the dispmanx
  46          display stack.
  47 --- /dev/null
  48 +++ b/arch/arm/boot/dts/overlays/upstream-aux-interrupt-overlay.dts
  49 @@ -0,0 +1,33 @@
  50 +// Overlay for missing AUX interrupt controller
  51 +// Instead we bind all AUX devices to the generic AUX interrupt line
  52 +/dts-v1/;
  53 +/plugin/;
  54 +
  55 +/ {
  56 +    compatible = "brcm,bcm2708";
  57 +
  58 +    fragment@0 {
  59 +        target = <&uart1>;
  60 +        __overlay__ {
  61 +            interrupt-parent = <&intc>;
  62 +            interrupts = <0x1 0x1d>;
  63 +        };
  64 +    };
  65 +
  66 +    fragment@1 {
  67 +        target = <&spi1>;
  68 +        __overlay__ {
  69 +            interrupt-parent = <&intc>;
  70 +            interrupts = <0x1 0x1d>;
  71 +        };
  72 +    };
  73 +
  74 +    fragment@2 {
  75 +        target = <&spi2>;
  76 +        __overlay__ {
  77 +            interrupt-parent = <&intc>;
  78 +            interrupts = <0x1 0x1d>;
  79 +        };
  80 +    };
  81 +};
  82 +