On Friday 17 August 2007, Hennerich, Michael wrote:
> What Mike wants to point out is that a external IRQ is first a GPIO and
> needs to be configured like an INPUT GPIO and then a specific bit needs
> to be set unmask it as IRQ.
>
> So why not use the GPIO infrastructure to setup this pin as GPIO?
My comments about the advantages of using that infrastructure
for *early* binding captured the key points ... it's "failfast".
For IRQs you're probably on decently firm ground, since it's
extremely rare that people not handle request_irq() errors.
Remember, I just pointed out that the "late fail" strategy
is unusual. That doesn't mean it's wrong ... just it'll be
a bit of surprise, some cognitive dissonance to developers
picking up a Blackfin project, potentially more error prone.
- Dave
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