target/linux/brcm2708/patches-4.19/950-0176-overlays-Add-gpio-no-bank0-irq-overlay.patch

   1 From deb8928a66ab048325b52a00c36bd8a69cd63bea Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Wed, 18 Jul 2018 17:25:00 +0100
   4 Subject: [PATCH 176/703] overlays: Add gpio-no-bank0-irq overlay
   5
   6 See: https://github.com/raspberrypi/linux/issues/2590
   7
   8 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
   9 ---
  10  arch/arm/boot/dts/overlays/Makefile                |  1 +
  11  arch/arm/boot/dts/overlays/README                  |  9 +++++++++
  12  .../dts/overlays/gpio-no-bank0-irq-overlay.dts     | 14 ++++++++++++++
  13  3 files changed, 24 insertions(+)
  14  create mode 100755 arch/arm/boot/dts/overlays/gpio-no-bank0-irq-overlay.dts
  15
  16 --- a/arch/arm/boot/dts/overlays/Makefile
  17 +++ b/arch/arm/boot/dts/overlays/Makefile
  18 @@ -37,6 +37,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  19         gpio-ir.dtbo \
  20         gpio-ir-tx.dtbo \
  21         gpio-key.dtbo \
  22 +       gpio-no-bank0-irq.dtbo \
  23         gpio-no-irq.dtbo \
  24         gpio-poweroff.dtbo \
  25         gpio-shutdown.dtbo \
  26 --- a/arch/arm/boot/dts/overlays/README
  27 +++ b/arch/arm/boot/dts/overlays/README
  28 @@ -597,6 +597,15 @@ Params: gpio                    GPIO pin
  29          keycode                 Set the key code for the button
  30
  31
  32 +Name:   gpio-no-bank0-irq
  33 +Info:   Use this overlay to disable GPIO interrupts for GPIOs in bank 0 (0-27),
  34 +        which can be useful for UIO drivers.
  35 +        N.B. Using this overlay will trigger a kernel WARN during booting, but
  36 +        this can safely be ignored - the system should work as expected.
  37 +Load:   dtoverlay=gpio-no-bank0-irq
  38 +Params: <None>
  39 +
  40 +
  41  Name:   gpio-no-irq
  42  Info:   Use this overlay to disable all GPIO interrupts, which can be useful
  43          for user-space GPIO edge detection systems.
  44 --- /dev/null
  45 +++ b/arch/arm/boot/dts/overlays/gpio-no-bank0-irq-overlay.dts
  46 @@ -0,0 +1,14 @@
  47 +/dts-v1/;
  48 +/plugin/;
  49 +
  50 +/ {
  51 +       compatible = "brcm,bcm2835";
  52 +
  53 +       fragment@0 {
  54 +               // Configure the gpio pin controller
  55 +               target = <&gpio>;
  56 +               __overlay__ {
  57 +                           interrupts = <255 255>, <2 18>;
  58 +               };
  59 +       };
  60 +};