[U-Boot] [PATCH v2 2/9] sunxi: initial sun7i pinmux and gpio support

[Marek Vasut]

On Wednesday, March 26, 2014 at 09:33:01 AM, Ian Campbell wrote:
> On Mon, 2014-03-24 at 21:54 +0100, Marek Vasut wrote:
> > > +int sunxi_gpio_set_cfgpin(u32 pin, u32 val);
> > > +int sunxi_gpio_get_cfgpin(u32 pin);
> > > +int sunxi_gpio_set_drv(u32 pin, u32 val);
> > > +int sunxi_gpio_set_pull(u32 pin, u32 val);
> > > +int name_to_gpio(const char *name);
> > > +#define name_to_gpio name_to_gpio
> > 
> > What is this ugly define doing here ?
> 
> common/cmd_gpio.c uses the #ifndef name_to_gpio pattern to provide (or
> not) a default fallback implementation. I think this is a reasonably
> (but not very) common idiom for such cases where the non-default variant
> is not best expressed as a macro.

This should be fixed, the name_to_gpio() there should be replaced by a __weak 
function. (patch is welcome)

Nonetheless, in your case, please don't do #define FOO FOO, but choose some 
sensible name for the function.

Best regards,
Marek Vasut