Re: Purpose of MMC_DATA_MULTI?

[Russell King <rmk+lkml@arm.linux.org.uk>]

On Thu, Feb 02, 2006 at 10:49:51AM +0100, Pierre Ossman wrote:
> Russell King wrote:
> >In short, it's defined to be whatever AT91_MCI_TRTYP_MULTIPLE means in
> >the AT91RM9200 MMC host driver, which appears to be set for any of the
> >multiple block commands.  They currently are doing:
> 
> That's a bit fuzzy and bound to give problems. Why not settle for the 
> first case and change their code to check the block count in the 
> request?

Mainly because I don't know if that's sufficient, and until I get around
to finding and reading the AT91RM9200 data sheet, I won't know if it is.
What I do know is that the addition of that flag provides the exact
information which the driver wants.

> >and using that as a lookup table by command for the value to put into
> >the command register.  I want to eliminate that, and not passing the
> >MULTI flag prevents elimination of this table.
> 
> Seems to be a common theme in the more recent drivers. Don't they teach 
> people proper layering in the schools anymore? :)

>From the evidence to date, it would appear not.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/