[U-Boot] [PATCH] [DFU] Implement NAND dfu support

[Scott Wood <scottwood@freescale.com>]

On 12/10/2012 07:16:50 PM, Tom Rini wrote:
> On Mon, Dec 10, 2012 at 07:09:55PM -0600, Scott Wood wrote:
> > On 12/10/2012 09:24:32 AM, Pantelis Antoniou wrote:
> > >+	sprintf(cmd_buf, "nand %s %p %llx %llx",
> > >+		op == DFU_OP_READ ? "read" : "write",
> > >+		 buf, start, count);
> > >+
> > >+	debug("%s: %s 0x%p\n", __func__, cmd_buf, cmd_buf);
> > >+	ret = run_command(cmd_buf, 0);
> >
> > Why not use the C interface to NAND?
> >
> > >+	/* find out how much actual bytes have been written */
> > >+	/* the difference is the amount of skip we must add from now on
> > >*/
> > >+	actual = nand_extent_skip_bad(&nand_info[dev], start, count);
> >
> > ...especially since you already need to interact with it here?
> 
> I've been talking with Pantelis about this as well and in short, this
> series adds NAND support ala MMC (which is to say, (ab)using the  
> command
> interface).  I think he was thinking we need a bit more generic help  
> to
> avoid having to duplicate the code the command interface also uses
> (state, sanity checking), iirc.

Some elaboration on what exactly he's relying on from the command line  
interface would be nice.

-Scott