From 00a2e04120a68c286d7fd86ed28ea9214d7c110e Mon Sep 17 00:00:00 2001 From: Phil Elwell Date: Wed, 18 Jul 2018 17:25:00 +0100 Subject: [PATCH 176/773] overlays: Add gpio-no-bank0-irq overlay See: https://github.com/raspberrypi/linux/issues/2590 Signed-off-by: Phil Elwell --- 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: + + 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>; + }; + }; +};