target/linux/brcm2708/patches-4.14/950-0316-overlays-Add-gpio-no-irq-overlay.patch

   1 From 174a2e7f83a033252da488edd3072f446f82325d Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Tue, 19 Jun 2018 15:04:45 +0100
   4 Subject: [PATCH 316/454] overlays: Add gpio-no-irq overlay
   5
   6 An overlay to disable all GPIO interrupts.
   7
   8 See: https://github.com/raspberrypi/linux/issues/2550
   9
  10 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  11 ---
  12  arch/arm/boot/dts/overlays/Makefile                |  1 +
  13  arch/arm/boot/dts/overlays/README                  |  7 +++++++
  14  arch/arm/boot/dts/overlays/gpio-no-irq-overlay.dts | 14 ++++++++++++++
  15  3 files changed, 22 insertions(+)
  16  create mode 100644 arch/arm/boot/dts/overlays/gpio-no-irq-overlay.dts
  17
  18 --- a/arch/arm/boot/dts/overlays/Makefile
  19 +++ b/arch/arm/boot/dts/overlays/Makefile
  20 @@ -35,6 +35,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  21         gpio-ir.dtbo \
  22         gpio-ir-tx.dtbo \
  23         gpio-key.dtbo \
  24 +       gpio-no-irq.dtbo \
  25         gpio-poweroff.dtbo \
  26         gpio-shutdown.dtbo \
  27         hifiberry-amp.dtbo \
  28 --- a/arch/arm/boot/dts/overlays/README
  29 +++ b/arch/arm/boot/dts/overlays/README
  30 @@ -583,6 +583,13 @@ Params: gpio                    GPIO pin
  31          keycode                 Set the key code for the button
  32
  33
  34 +Name:   gpio-no-irq
  35 +Info:   Use this overlay to disable all GPIO interrupts, which can be useful
  36 +        for user-space GPIO edge detection systems.
  37 +Load:   dtoverlay=gpio-no-irq
  38 +Params: <None>
  39 +
  40 +
  41  Name:   gpio-poweroff
  42  Info:   Drives a GPIO high or low on poweroff (including halt). Enabling this
  43          overlay will prevent the ability to boot by driving GPIO3 low.
  44 --- /dev/null
  45 +++ b/arch/arm/boot/dts/overlays/gpio-no-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;
  58 +               };
  59 +       };
  60 +};