[PATCH 05/33] gpio: add generic single-register fixed-direction GPIO driver

[Russell King - ARM Linux]

On Fri, Sep 02, 2016 at 11:21:12PM +0200, Robert Jarzmik wrote:
> It looks that I have an ordering problem :
>  - I want gpio-pxa.probe() to be called at device initcall time
>  - pxa_cplds_irqs.probe() cannot complete before gpio-pxa.probe() because it
>    needs GPIO0 as its interrupt source
>    => it might need to honor -EPROBE_DEFER
>  - sa1111.sa1111_probe() cannot complete before pxa_cplds_irqs.probe() because
>    it needs IRQ305 as its source
>    => it might need to honor -EPROBE_DEFER

I wonder if we can work around that by adding this to sa1111_probe():

	if (!irq_get_chip(irq))
		return -EPROBE_DEFER;

It's not particularly nice, but it should at least ensure that things
happen in the right order.

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