Patch "ARM: dts: armada-38x: Fix irq type for pca955" has been added to the 4.9-stable tree

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 4.9-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-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Gregory CLEMENT <[email protected]>
Date: Wed, 12 Jul 2017 13:23:11 +0200
Subject: ARM: dts: armada-38x: Fix irq type for pca955

From: Gregory CLEMENT <[email protected]>

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!"

Development Board support")

---
 arch/arm/boot/dts/armada-388-gp.dts |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

@@ -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 [email protected] are

queue-4.9/arm-dts-armada-38x-fix-irq-type-for-pca955.patch