[U-Boot] [PATCH 1/4] gpio: Adds GPIO driver support for Armada100

[Wolfgang Denk]

Dear Ajay Bhargav,

In message <794341286.33968.1311143785027.JavaMail.root at ahm.einfochips.com> you wrote:
> 
> > Is there any specific reason for not using u32 for the padding as
> > well?
> > 
> nothing specific. It makes easy to find number of bytes than words.

If there is no specific reason (which I could not think of either),
then please use u32 consistently.

If you think in number of bytes, feel free to write

	u32	reserved[128/sizeof(u32)];

> > Why would you need this BASE + OFFSET notation when using a C struct
> > for the registers? Thi smakes little sense to me.
> 
> Well I did use the C struct method, if you see my patches submitted earlier
> but according to Prafulla and Lie structure size is too big. so they want me

Who cares about the size of the struct?  We never alocate any memory
for such a structure - it is just an overlay over the existing
register space, so nobody cares if this is 16 kB of 16 MB.

> to use a mix of C struct and BASE + OFFSET notation. so I thought to break the big
> C struct into smaller grouped structures pointing each group with GPIO base + group
> offset. I would be glad if you can suggest me something better or smarter.

This may make sense of you have separate, logically independent IP
blocks.  But the reason for such a desicion is if the data belong
together in any way or not.

The "size" of such a structure is completely irrelevant.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Pray to God, but keep rowing to shore. - Russian Proverb