Re: [PATCH] mfd/mc13783: near complete rewrite

[Mark Brown <broonie@opensource.wolfsonmicro.com>]

On Mon, Nov 02, 2009 at 03:32:29PM +0100, Uwe Kleine-König wrote:

> On mc13783 the 1HZ irq triggers immediately after unmasking provided
> that it has power for more than 1s.  Because of locking the irq isn't
> recognized as 1HZ as the irqhandler tries to take the lock that the rtc
> probe function is holding and only releasing after the irq is masked.
> So for me it's just a spurious irq.

Hrm, I can't see that in the RTC driver code?  I'd have expected that if
there is a lock it'd ensure that the handler is in place before the
interrupt is unmasked.

Looking at the IRQ handler I do notice that you require all the handlers
to explicitly ack their interrupts - are there circumstances where a
handler wouldn't want to do the ack?  If there aren't it'd seem like
it'd save work to have the core driver do the acks.