overlays: Add gpio-no-bank0-irq overlay

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

Signed-off-by: Phil Elwell <phil@raspberrypi.org>

diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile
index 9933835..bcfde48 100644 (file)
--- 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 \

diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
index ab70c05..fda97eb 100644 (file)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -597,6 +597,15 @@ Params: gpio                    GPIO pin to trigger on (default 3)
         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.

diff --git a/arch/arm/boot/dts/overlays/gpio-no-bank0-irq-overlay.dts b/arch/arm/boot/dts/overlays/gpio-no-bank0-irq-overlay.dts
new file mode 100755 (executable)
index 0000000..96cbe80
--- /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>;
+               };
+       };
+};