* Jon Hunter <jon-hunter@xxxxxx> [120612 17:45]:
> When booting with device-tree on an OMAP2420H4, the kernel is hanging when
> initialising the interrupts and following kernel dumps is seen ...
>
> [ 0.000000] ------------[ cut here ]------------
> [ 0.000000] WARNING: at arch/arm/mach-omap2/irq.c:271 omap_intc_of_init+0x50/0xb4()
> [ 0.000000] unable to get intc registers
> [ 0.000000] Modules linked in:
> [ 0.000000] [<c001befc>] (unwind_backtrace+0x0/0xf4) from [<c0040c34>] (warn_slowpath_common+0x4c/0x64)
> [ 0.000000] [<c0040c34>] (warn_slowpath_common+0x4c/0x64) from [<c0040ce0>] (warn_slowpath_fmt+0x30/0x40)
> [ 0.000000] [<c0040ce0>] (warn_slowpath_fmt+0x30/0x40) from [<c066b8a4>] (omap_intc_of_init+0x50/0xb4)
> [ 0.000000] [<c066b8a4>] (omap_intc_of_init+0x50/0xb4) from [<c0688b70>] (of_irq_init+0x144/0x288)
> [ 0.000000] [<c0688b70>] (of_irq_init+0x144/0x288) from [<c0663294>] (init_IRQ+0x14/0x1c)
> [ 0.000000] [<c0663294>] (init_IRQ+0x14/0x1c) from [<c06607fc>] (start_kernel+0x198/0x304)
> [ 0.000000] [<c06607fc>] (start_kernel+0x198/0x304) from [<80008044>] (0x80008044)
> [ 0.000000] ---[ end trace 1b75b31a2719ed1c ]---
> [ 0.000000] of_irq_init: children remain, but no parents
>
> The OMAP2 interrupt controller binding is missing the number of interrupts and
> interrupt controller register address. Adding these fixes the problem.
Thanks this is a good one, applying into fixes.
Tony
>
> This is based upon latest linux-omap master (3.5-rc1) git tree.
>
> Signed-off-by: Jon Hunter <jon-hunter@xxxxxx>
> ---
> arch/arm/boot/dts/omap2.dtsi | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm/boot/dts/omap2.dtsi b/arch/arm/boot/dts/omap2.dtsi
> index f2ab4ea..581cb08 100644
> --- a/arch/arm/boot/dts/omap2.dtsi
> +++ b/arch/arm/boot/dts/omap2.dtsi
> @@ -44,6 +44,8 @@
> compatible = "ti,omap2-intc";
> interrupt-controller;
> #interrupt-cells = <1>;
> + ti,intc-size = <96>;
> + reg = <0x480FE000 0x1000>;
> };
>
> uart1: serial@4806a000 {
> --
> 1.7.9.5
>
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