Re: [PATCH v3] ARM: pxa: fix pxa interrupts handling in DT

From: Robert Jarzmik
Date: Mon Feb 23 2015 - 16:42:09 EST

Robert Jarzmik <robert.jarzmik@xxxxxxx> writes:

> The commit "ARM: pxa: arbitrarily set first interrupt number" changed
> the first pxa interrupt to 16.
> As a consequence, device-tree builds got broken, because :
> - pxa_mask_irq() and pxa_unmask_irq() are using IRQ_BIT()
> - IRQ_BIT(x) calculates the interrupts as : x - PXA_IRQ(0)
> Before the commit, the first interrupt shift, PXA_IRQ(0) was 0,
> therefore IRQ_BIT(x) was x. After the change, it is necessary that the
> same shift of 16 is applied between the virtual interrupt number and the
> hardware irq number.
> This situation comes from the common irq_chip shared between legacy
> platform builds and device-tree builds.
> Fix the broken interrupts in DT case by adding this shift in the DT case
> too.
> As a consequence of the IRQ_BIT() is removed alltogether from interrupts
> handling, even in the platform data types of platforms :
> - a legacy irq domain is used
> - the irq_chip handles hardware interrupts
> - the virtual to hardware interrupt conversion is fully handled by irq
> domain mechanics
> Signed-off-by: Robert Jarzmik <robert.jarzmik@xxxxxxx>
Queued in pxa/fixes.

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