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From 174a2e7f83a033252da488edd3072f446f82325d Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 19 Jun 2018 15:04:45 +0100
Subject: [PATCH 316/454] overlays: Add gpio-no-irq overlay
An overlay to disable all GPIO interrupts.
See: https://github.com/raspberrypi/linux/issues/2550
Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 7 +++++++
arch/arm/boot/dts/overlays/gpio-no-irq-overlay.dts | 14 ++++++++++++++
3 files changed, 22 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/gpio-no-irq-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -35,6 +35,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
gpio-ir.dtbo \
gpio-ir-tx.dtbo \
gpio-key.dtbo \
+ gpio-no-irq.dtbo \
gpio-poweroff.dtbo \
gpio-shutdown.dtbo \
hifiberry-amp.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -583,6 +583,13 @@ Params: gpio GPIO pin
keycode Set the key code for the button
+Name: gpio-no-irq
+Info: Use this overlay to disable all GPIO interrupts, which can be useful
+ for user-space GPIO edge detection systems.
+Load: dtoverlay=gpio-no-irq
+Params: <None>
+
+
Name: gpio-poweroff
Info: Drives a GPIO high or low on poweroff (including halt). Enabling this
overlay will prevent the ability to boot by driving GPIO3 low.
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/gpio-no-irq-overlay.dts
@@ -0,0 +1,14 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835";
+
+ fragment@0 {
+ // Configure the gpio pin controller
+ target = <&gpio>;
+ __overlay__ {
+ interrupts;
+ };
+ };
+};
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