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SubjectRe: [PATCH v3 1/6] irqchip: add support for Marvell Orion SoCs
On 06/11/13 15:30, Thomas Gleixner wrote:
> On Tue, 11 Jun 2013, Thomas Gleixner wrote:
>
>> On Thu, 6 Jun 2013, Sebastian Hesselbarth wrote:
>>
>>> This patch adds an irqchip driver for the main interrupt controller found
>>> on Marvell Orion SoCs (Kirkwood, Dove, Orion5x, Discovery Innovation).
>>> Corresponding device tree documentation is also added.
>>>
>>> Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
>>
>> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
>
> Second thoughts:
>
>> +static void orion_bridge_irq_handler(unsigned int irq, struct irq_desc *desc)
>> +{
>> + struct irq_domain *d = irq_get_handler_data(irq);
>> + struct irq_chip_generic *gc = irq_get_domain_generic_chip(d, irq);
>> + u32 stat = readl_relaxed(gc->reg_base + ORION_BRIDGE_IRQ_CAUSE) &
>> + gc->mask_cache;
>
> In init you map the first irq of that chip and install the chain
> handler for it. Now if that first irq fires, isn't that set in the
> cause register as well? And what acks that first irq?

It is "acked" by acking all unmasked bridge irqs.

Sebastian



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