From afe88750090d60d94b365250968e116ec88448c1 Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Wed, 18 Jul 2018 17:25:00 +0100
Subject: [PATCH] overlays: Add gpio-no-bank0-irq overlay

See: https://github.com/raspberrypi/linux/issues/2590

Signed-off-by: Phil Elwell <phil@raspberrypi.org>
---
 arch/arm/boot/dts/overlays/Makefile                |  1 +
 arch/arm/boot/dts/overlays/README                  |  9 +++++++++
 .../dts/overlays/gpio-no-bank0-irq-overlay.dts     | 14 ++++++++++++++
 3 files changed, 24 insertions(+)
 create mode 100755 arch/arm/boot/dts/overlays/gpio-no-bank0-irq-overlay.dts

--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -37,6 +37,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	gpio-ir.dtbo \
 	gpio-ir-tx.dtbo \
 	gpio-key.dtbo \
+	gpio-no-bank0-irq.dtbo \
 	gpio-no-irq.dtbo \
 	gpio-poweroff.dtbo \
 	gpio-shutdown.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -597,6 +597,15 @@ Params: gpio                    GPIO pin
         keycode                 Set the key code for the button
 
 
+Name:   gpio-no-bank0-irq
+Info:   Use this overlay to disable GPIO interrupts for GPIOs in bank 0 (0-27),
+        which can be useful for UIO drivers.
+        N.B. Using this overlay will trigger a kernel WARN during booting, but
+        this can safely be ignored - the system should work as expected.
+Load:   dtoverlay=gpio-no-bank0-irq
+Params: <None>
+
+
 Name:   gpio-no-irq
 Info:   Use this overlay to disable all GPIO interrupts, which can be useful
         for user-space GPIO edge detection systems.
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/gpio-no-bank0-irq-overlay.dts
@@ -0,0 +1,14 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		// Configure the gpio pin controller
+		target = <&gpio>;
+		__overlay__ {
+			    interrupts = <255 255>, <2 18>;
+		};
+	};
+};