Am 29.07.2013 13:30, schrieb Alexander Holler:
So I think the driver has to be changed independently of the approach
for auto request GPIO used.
Maybe, but that isn't much effort. I had done that in 3 minutes (ok,
without the would be necessary #ifdef CONFIG_OF_GPIO). But you have a
chicken and egg situation here, because you can't change drivers without
the new patch and you can't introduce the new patch without changes to
drivers.
As I had mentioned before, another approach could be to map the irq when
gpio_to_irq() is called. I think that would be downward compatible
without the need for some changes in a dts.
Having send that, I had another idea: introduce a config option to
enable/disable the new behaviour. That would make it possible to change
drivers while not breaking compatibility, and when all are changed, the
config option could go away.
Regards,
Alexander Holler
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