[U-Boot] [PATCH 3/5] ppc4xx: Move gpio.h to ppc4xx-gpio.h since its ppc4xx specific

[Stefan Roese]

Hi Detlev,

On Thursday 16 September 2010 15:00:05 Detlev Zundel wrote:
> > Please note that I plan to stay with this "asm/ppc4xx-gpio.h" name
> > instead of "asm/gpio.h", since there are many other PowerPC variants out
> > there.
> 
> I have to admit that I don't like this.
> 
> Hm, while you are doing something here, why not follow the Blackfin
> example which I like a lot and move towards the Linux gpio interface
> (see end of ./arch/blackfin/include/asm/gpio.h).  It will be just lovely
> to only generically request a gpio in common driver code.
> 
> Going down this route, code using gpios will only include "asm/gpio.h"
> and use the generic functions.  Doesn't that sound like a worthwhile
> target? ;)

Sure. I'm all for this idea, all platforms implementing this common GPIO 
framework. The current 4xx GPIO implementation out-dates the Linux framework, 
since I added this quite some time ago. Perhaps I'll find some time in the 
future to move to this common platform for PPC4xx as well. I won't complain if 
somebody beats me at though. ;)

Back to the subject: This patch right now was simply meant as part of a header 
cleanup patch, moving a 4xx specific header with stuff like this:

/* GPIO controller */
struct ppc4xx_gpio {
        u32 or;         /* Output Control */
        u32 tcr;        /* Tri-State Control */
...

to a "better" name. Even though the common gpio framework should be the "final 
target", I think it makes sense to make this header name move right now.

Cheers,
Stefan

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