From mboxrd@z Thu Jan  1 00:00:00 1970
From: szemzo.andras@gmail.com (Andras Szemzo)
Date: Fri, 2 Sep 2016 08:51:39 +0200
Subject: irq_create_fwspec_mapping() in 4.8-rc2
Message-ID: <483F737F-9868-4E8A-A831-AA3F6F410AFF@gmail.com>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

Hi,

I try to use 4.8-rc2 on my armv7m board, and I have a problem with GPIO IRQ.
In my device-tree, I define the ethernet PHY IRQ like this:

 pioC: gpio at 0x400e1200 {
    compatible = "atmel,at91sam9x5-gpio", "atmel,at91rm9200-gpio";
    reg = <0x400e1200 0x200>;
    interrupts = <12>;
    #gpio-cells = <2>;
    gpio-controller;
    interrupt-controller;
    #interrupt-cells = <2>;
    clocks = <&pioC_clk>;
};
...
ethernet-phy at 1 {
     reg = <1>;
     interrupt-parent = <&pioC>;
     interrupts = <11 IRQ_TYPE_EDGE_FALLING>;
     reset-gpios = <&pioC 10 GPIO_ACTIVE_HIGH>;
};

with the 4.8-rc2 kernel at boot it fails with error:

irq: type mismatch, failed to map hwirq-11 for /soc/pinctrl at 0x400e0e00/gpio at 0x400e1200!

This error comes from kernel/irq/irq_domain.c, irq_create_fwspec_mapping().

My quick hack was to replace this function from 4.6.0 (where with the same device-tree, same kernel config it works) 
and everything works as expected.

Maybe this hack is hiding a problem from somewhere else, but I can?t figure out what I missed.

Thanks,
Andras