This is a note to let you know that I've just added the patch titled
ARM: dts: armada-38x: Fix irq type for pca955
to the 4.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
arm-dts-armada-38x-fix-irq-type-for-pca955.patch
and it can be found in the queue-4.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8d4514173211586c6238629b1ef1e071927735f5 Mon Sep 17 00:00:00 2001
From: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
Date: Wed, 12 Jul 2017 13:23:11 +0200
Subject: ARM: dts: armada-38x: Fix irq type for pca955
From: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
commit 8d4514173211586c6238629b1ef1e071927735f5 upstream.
As written in the datasheet the PCA955 can only handle low level irq and
not edge irq.
Without this fix the interrupt is not usable for pca955: the gpio-pca953x
driver already set the irq type as low level which is incompatible with
edge type, then the kernel prevents using the interrupt:
"irq: type mismatch, failed to map hwirq-18 for
/soc/internal-regs/gpio@18100!"
Fixes: 928413bd859c ("ARM: mvebu: Add Armada 388 General Purpose
Development Board support")
Signed-off-by: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/arm/boot/dts/armada-388-gp.dts | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/arm/boot/dts/armada-388-gp.dts
+++ b/arch/arm/boot/dts/armada-388-gp.dts
@@ -75,7 +75,7 @@
pinctrl-names = "default";
pinctrl-0 = <&pca0_pins>;
interrupt-parent = <&gpio0>;
- interrupts = <18 IRQ_TYPE_EDGE_FALLING>;
+ interrupts = <18 IRQ_TYPE_LEVEL_LOW>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
@@ -87,7 +87,7 @@
compatible = "nxp,pca9555";
pinctrl-names = "default";
interrupt-parent = <&gpio0>;
- interrupts = <18 IRQ_TYPE_EDGE_FALLING>;
+ interrupts = <18 IRQ_TYPE_LEVEL_LOW>;
gpio-controller;
#gpio-cells = <2>;
interrupt-controller;
Patches currently in stable-queue which might be from gregory.clement@xxxxxxxxxxxxxxxxxx are
queue-4.12/arm-mvebu-use-__pa_symbol-in-the-mv98dx3236-platform-smp-code.patch
queue-4.12/arm-dts-armada-38x-fix-irq-type-for-pca955.patch
queue-4.12/arm64-dts-marvell-armada-37xx-fix-the-number-of-gpio-on-south-bridge.patch