[PATCH] adding ROM chips to device tree: respin
Vitaly Wool
vwool at ru.mvista.com
Wed Nov 8 08:44:22 EST 2006
В Ср, 08/11/2006 в 00:25 +0300, Sergei Shtylyov пишет:
> Hello.
>
> Vitaly Wool wrote:
> >>>+ - memory_space : Offset and length of the register set for the device.
> >>
> >> NAK. There's no need to define an extra property where "reg" should be used.
>
> > The register set is actually not there and depends on flash chip type.
> > So using regs here is misleading.
>
> This is an I/O resource on the parent bus and using the property other
> than "reg" will be misleading. That's the way this spec has it -- "reg" is
> used even for the PHY chip numbering on MDIO bus...
So what? Lemme remind you that the actual registers *doesn't start* at
the specified "start" so using regs is really a bad idea IMHO.
> >>>+
> >>>+ /*
> >>>+ * We care only about physmap devices now as there's no
> >>>+ * description defined for other ROM types yet
> >>>+ */
>
> >> Not true. The description only says that it's *most probably* compatible
> >>with "physmap", that's all. I don't see why we have to limit ourselves here.
>
> > Effectively we care about NOR chips and similar which are
> > memory-mapped.
>
> So what? How "physmap" follows from this?
Okay, probably we can go you way naming of_device by what it's
compatible with. So that "physmap" compatible would be called
"physmap-flash", "nand"-compatible would be called "nand-flash" etc.
Does that work for you?
Vitaly
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