On Tuesday 04 November 2008, Grant Likely wrote:
> At this point, instead of #ifdeffing the function signature, I would
> much rather see this generalized as something like
> 'mdio_gpio_setup()'. Then move the OF and non-OF specific bits into
> two new functions; mdio_ofgpio_probe() and mdio_gpio_probe(). The two
> new functions should be placed with the appropriate bus binding in the
> #ifdef/#else block at the bottom of the file.
Or if possible something that creates a single #ifdef that
ensures dead code elimination will remove the "other" branch,
but ensures all platforms will build both versions:
#ifdef OF
#define using_of true
#else
#define using_of false
#endif
...
static int __init mdio_gpio_init(void)
{
if (using_of)
return register mdio_ofgpio driver;
else
return register mdio_gpio driver;
}
subsys_initcall(mdio_gpio_init);
...
That's generally the preferred way to handle #ifdeffery.
But I could imagine OF isn't (yet?) set up to handle it.
- Dave
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