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61 lines
1.9 KiB
Diff
61 lines
1.9 KiB
Diff
From afe88750090d60d94b365250968e116ec88448c1 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Wed, 18 Jul 2018 17:25:00 +0100
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Subject: [PATCH 176/806] overlays: Add gpio-no-bank0-irq overlay
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See: https://github.com/raspberrypi/linux/issues/2590
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 9 +++++++++
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.../dts/overlays/gpio-no-bank0-irq-overlay.dts | 14 ++++++++++++++
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3 files changed, 24 insertions(+)
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create mode 100755 arch/arm/boot/dts/overlays/gpio-no-bank0-irq-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -37,6 +37,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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gpio-ir.dtbo \
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gpio-ir-tx.dtbo \
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gpio-key.dtbo \
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+ gpio-no-bank0-irq.dtbo \
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gpio-no-irq.dtbo \
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gpio-poweroff.dtbo \
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gpio-shutdown.dtbo \
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -597,6 +597,15 @@ Params: gpio GPIO pin
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keycode Set the key code for the button
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+Name: gpio-no-bank0-irq
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+Info: Use this overlay to disable GPIO interrupts for GPIOs in bank 0 (0-27),
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+ which can be useful for UIO drivers.
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+ N.B. Using this overlay will trigger a kernel WARN during booting, but
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+ this can safely be ignored - the system should work as expected.
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+Load: dtoverlay=gpio-no-bank0-irq
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+Params: <None>
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+
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+
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Name: gpio-no-irq
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Info: Use this overlay to disable all GPIO interrupts, which can be useful
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for user-space GPIO edge detection systems.
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/gpio-no-bank0-irq-overlay.dts
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@@ -0,0 +1,14 @@
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+/dts-v1/;
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+/plugin/;
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+
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+/ {
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+ compatible = "brcm,bcm2835";
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+
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+ fragment@0 {
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+ // Configure the gpio pin controller
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+ target = <&gpio>;
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+ __overlay__ {
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+ interrupts = <255 255>, <2 18>;
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+ };
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+ };
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+};
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